inolab 740 with terminal 740

Transcription

1 RUN ENTER AR inolab Operating manual with terminal 740 Cond 730 measuring system with active multifunction boxes and 740 terminal ba75446e04 06/2007

2 Accuracy when going to press The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions. Warranty We guarantee the instrument described for 3 years from the date of purchase. The instrument warranty covers manufacturing faults that are discovered within the warranty period. The warranty does not cover components that are replaced during maintenance work, e. g. batteries. The warranty claim extends to restoring the instrument to readiness for use but not, however, to any further claim for damages. Improper handling or unauthorized opening of the instrument invalidates any warranty claim. To ascertain the warranty liability, return the instrument and proof of purchase together with the date of purchase freight paid or prepaid. Copyright Weilheim 2007, WTW GmbH Reprinting - even as excerpts - is only allowed with the explicit written authorization of WTW GmbH, Weilheim. Printed in Germany. 2 ba75446e04 06/2007

3 Contents - Contents 1 Overview Measuring module Terminal Display Keys Sockets on the terminal Firmware Safety Authorized use General safety instructions Commissioning Scope of delivery Preparing the measuring system Switching on the measuring system Settings Updating the terminal software (firmware) Checking the version no. of the terminal firmware Starting the update of the terminal firmware Basic principles of operation Display Status display indicators Softkey functions Symbols in the Menu mode Display of measured values Keys Keys on the terminal Keys on the measuring module IBM PC keyboard Barcode reader Menu Output of measured data Measured data display on the screen Measured data output on the integrated printer Outputting measured data to the RS232/REC interface ba75446e04 06/2007 3

4 Contents 5 System settings Date and time Changing the language Display settings Display contrast Display illumination Acoustic signals Temperature Temperature unit Measuring the temperature User profiles Opening the Administration menu Opening the Administration window Creating, editing, or deleting a user profile Printing the list of user profiles Password for user names Changing the password Assigning a password Forgotten the password? Modules ph Settings for ph Displaying ph/ise or measured voltage values Setting the ph display Measured value resolution of voltage display Measured value resolution of ph display Resetting to default settings Calibrating ph measurements Buffer sets Calibration settings Calibration Measuring the ph value Measuring the ORP voltage Ion concentration Settings for ISE Displaying ph/ise or measured voltage values Setting up the ISE display Determining the measuring range Measured value resolution of voltage display Resetting to default settings Advanced settings for ISE Units of the ISE display Blank value correction (Bw Corr) Reference measurement (Ref Meas) Criterion for AutoRead (AutoRead) ba75446e04 06/2007

5 Contents 7.3 Calibration for ion-selective measurements Two-point and three-point calibration Four-point to six-point calibration Measuring the ion concentration Select the measuring method Standard Addition (Std Add) Double Standard Addition (Std Add ++) Standard Subtraction (Std Sub) Sample Addition (Smp Add) Sample Subtraction (Smp Sub) Standard addition with blank value correction (Bw Add) Dissolved oxygen (D. O.) Settings for D. O. measurements Determining the measuring range Displaying the air pressure Salinity correction Resetting to default settings Calibrating for D. O. measurements Settings Calibrating with the air calibration vessel Calibrating via a comparison measurement Measuring the D. O. content Selecting the measured value display Drift control (AutoRead) BOD General information Operation with the StirrOx G oxygen sensor Operation with a barcode reader BOD measurement Procedure Start measurement Stopping the BOD measurement End measurement BOD result Displaying, editing and printing the measurement result Deleting BOD measurement results Routines Setting up routines Starting a measurement with routine Deleting routines ba75446e04 06/2007 5

6 Contents 10 Conductivity Settings for conductivity measurements Determining the measuring range Entering the reference temperature Displaying the conductivity or specific resistance Setting the temperature compensation Reset (Reset) Determining/setting up the cell constant Determining the cell constant (calibration) Setting the cell constant Measuring the conductivity General information Displaying the conductivity, dry filtrate residue or salinity Drift control (AutoRead) Data storage Storage of measurement data records Saving individual measurement data records Automatically storing measurement data records Displaying stored measurement data records Deleting stored measurement data records Storage of system configurations Saving the system configuration Recalling a system configuration Deleting a system configuration Storage of calibration records Data output Data output to the display Numerical display Graphical display Outputting data to the integrated printer General information Switching on the integrated printer Data output to the integrated printer Printing Outputting data to an external printer/pc Outputting data to the RS232/REC interface Setting the baud rate Determining the data format Setting the print interval Outputting data to an external printer or PC Outputting data to the external recorder ba75446e04 06/2007

7 Contents 13 Maintenance, cleaning, disposal Maintenance Replacing the batteries Changing the roll of paper Maintenance of the probes Cleaning Disposal What to do if Terminal messages Printer messages ph/voltage system messages Ion concentration system messages Oxygen system messages Conductivity system messages Technical data Terminal Measuring module ph/electromotive force of the electrode: Ion concentration Dissolved oxygen Conductivity Lists Abbreviations Glossary Index ba75446e04 06/2007 7

8 Contents 8 ba75446e04 06/2007

9 RUN ENTER AR inolab Overview 1 Overview The measuring system is suitable for operating with an terminal and also with a PC. This manual contains a description of the operation of with terminal. Terminal Measuring module (active multifunction box) Cond 730 Note The operation of measuring modules on the PC with the MultiLab pilot software is described in a separate operating manual. The newest software version of MultiLab pilot is available on the Internet under Note Information on other accessories is given in the WTW catalog, LABORATORY AND FIELD INSTRUMENTATION, or is available via the Internet. ba75446e04 06/2007 9

10 Overview 1.1 Measuring module The measuring system works together with the following active multifunction boxes: ph, ph/ion, Oxi, BSB/BOD, Cond, ph/cond and Multi. Each measuring module has its own fixed software in order to process the probe signals and to communicate with the terminal. Measuring module A detailed description of the operating elements on the measuring module can be found in chapter 4 BASIC PRINCIPLES OF OPERATION. 10 ba75446e04 06/2007

11 Overview 1.2 Terminal The terminal is both the display and entry unit of the system. The settings for the measurement and display of the measured values are menu-driven via the display. The terminal is optionally equipped with an integrated printer. The terminal recognizes the type of measuring module connected and the probe operated with the measuring module via the connection cable Display The display of the terminal shows: 1 Menu line to select the measuring and display settings 2 Type of temperature measurement, i.e. manual entry, external or integrated temperature probe 3 Status line that displays the active functions and settings 4 Softkey functions 5 Current measured temperature value 6 Current measured value 7 Selected measured variable The measured value, active functions or settings and available menu items that are displayed always correspond to the active probe and the selected measured variable. ba75446e04 06/

12 Overview Keys The measuring system has a keypad on the terminal and one on the measuring module. The terminal keys operate the entire measuring system. Using the g and a keys on the measuring module, you can also operate the AutoRead function (drift control) on the measuring module. The LED on the measuring module shows the AutoRead status. Terminal Measuring module RUN ENTER AR The topmost row of keys on the terminal consists of softkeys. Each softkey carries out the softkey function that is displayed directly above the key. A detailed diagram and description of the keys and softkeys is given in chapter 4 BASIC PRINCIPLES OF OPERATION. 12 ba75446e04 06/2007

13 Overview Sockets on the terminal Connections: 4 1 Plug-in power supply unit 2 measuring module 3 RS 232 interface/analog output 4 IBM PC keyboard (via adapter cable AK T-K PS2) Warning The line voltage on site must lie within the input voltage range of the original plug-in power supply unit. Use original plug-in power supplies only (see chapter 15 TECHNICAL DATA). ba75446e04 06/

14 Overview Firmware The terminal software (firmware) can be updated. You can always install the newest software version for the terminal via a connected PC and a special update program. The details of the update are given insection 3.5 and in the installation program for the update. Note Further information on the latest software version is available from WTW or on the Internet under The addresses and telephone numbers of the WTW subsidiaries are given on the cover of this operating manual. 14 ba75446e04 06/2007

15 Safety 2 Safety Target group Symbols used This operating manual contains basic instructions that must be followed in the commissioning, operation and maintenance of the (terminal and measuring module) measuring system. Consequently, all responsible personnel must read this operating manual carefully before working with the measuring system. The operating manual must always be available within the vicinity of the measuring system. The measuring system was developed for use in the laboratory. Thus, we assume that, as a result of their professional training and experience, the operators will know the necessary safety precautions to take when handling chemicals. Warning indicates safety instructions that must be followed to prevent damage to persons and property. Note indicates notes that draw your attention to special features. Note indicates cross-references to other documents, e.g. application reports, operating manuals of probes, etc. ba75446e04 06/

16 Safety 2.1 Authorized use This measuring system is authorized exclusively for potentiometric, conductimetric or amperometric measurements in the laboratory. The technical specifications as given in chapter 15 TECHNICAL DATA must be observed. Only the operation and running of the measuring instrument according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized. Function and operating safety 2.2 General safety instructions This measuring system is constructed and tested in compliance with the EN safety regulations for electronic measuring instruments. It left the factory in a safe and secure technical condition. The smooth functioning and operational safety of the measuring system can only be guaranteed if the generally applicable safety measures and the specific safety instructions in this operating manual are followed during operation. The smooth functioning and operational safety of the instrument can only be guaranteed under the environmental and electrical operating conditions that are in specified in chapter 15 TECHNICAL DATA. If the measuring system was transported from a cold environment to a warm environment, the formation of condensate can impair the functioning of the measuring system. In this event, wait until the temperature of the measuring system reaches room temperature before putting the measuring system back into operation. Warning The measuring system is only allowed to be opened by personnel authorized by WTW. 16 ba75446e04 06/2007

17 Safety Safe operation If safe operation is no longer possible, the measuring system must be taken out of service and secured against inadvertent operation! Safe operation is no longer possible if the measuring system (terminal or measuring module):! has been damaged in transport! has been stored under adverse conditions for a lengthy period of time! is visibly damaged! no longer operates as described in this manual. If you are in any doubt, please contact the supplier of the measuring system. Obligations of the purchaser The purchaser of this measuring system must ensure that the following laws and guidelines are observed when using dangerous substances:! EEC directives for protective labor legislation! National protective labor legislation! Safety regulations! Safety datasheets of the chemical manufacturers. ba75446e04 06/

18 Safety 18 ba75446e04 06/2007

19 Commissioning 3 Commissioning 3.1 Scope of delivery! The Set includes: terminal, 740 measuring module and probe (depending on the composition of the set)! Operating and display instrument terminal Plug-in power supply with country-specific adapters (for Great Britain, United States of America, Europe and Australia) RS 232 interface cable, AK T-PC (for data transmission on the PC and software update).! Measuring module (active multifunction box) measuring module (depending on how the set is made up) Connecting cable (AK M-T) from the measuring module to the terminal Stand rod Probe holder Locking holder for non-active probes for BSB/BOD measuring module: Adapter cable AK T-K PS2 for connecting a barcode reader or an IBM-PC keyboard to the measuring module! Software MultiLab pilot on CD-ROM! Connecting cable AK M-PC from the measuring module to the PC! Operating manual for terminal and measuring module ba75446e04 06/

20 inolab Commissioning 3.2 Preparing the measuring system A measuring module that is ready for operation looks as follows: AR RUN ENTER Cable holder 2 Stand rod 3 Opening to the cable shaft 4 Connection cable to the terminal (AK M-T) 6 Locking holder 7 Beaker with test solution 8 Probe 9 Freely adjustable probe holder 10 Locking key for probe holder 11 Connection cable: Probe - measuring module 20 ba75446e04 06/2007

21 Commissioning Perform the following activities before commissioning the system:! Prepare the measuring module! Connect the probe! Connect the terminal! Connect the plug-in power supply! Connect the system upgrades Preparing the module 1 Place the measuring module on a flat surface and protect it from intense light and heat. 2 Insert the stand rod (2) into the measuring module. 3 Fix the probe holder (9) onto the stand rod. 4 Adjust the height of the probe holder (9) using the locking key (10). Connecting the probe 5 Place the probe (8) into the probe holder (9). 6 Place the cable (11) of the probe (8) into the cable holder (1) on the stand rod. Connections depending on the measuring module: 12 ph/orp electrode or ion-selective electrode 13 D. O. probe or conductivity cell 14 Oxygen probe with integrated stirrer (StirrOx G) 15 Reference electrode 16 Temperature probe ba75446e04 06/

22 Commissioning 7 Plug the probe (8) on the measuring module into the respective socket (12 or 13). 8 If necessary, insert the plug for the temperature probe of the electrode into the socket (16). 9 Prepare the beaker with the test solution (7). 10 Adjust the height of the probe holder (9) by pressing the locking key (10) so that the probe is immersed in the test solution. 11 For ph, ORP or ISE electrodes with a separate reference electrode: Plug the reference electrode into the socket (15). 12 Place the probe cable (11) into the cable shaft (3) so that it is stored safely. Connecting the terminal 13 Plug the connecting cable to the terminal (AK M-T) into the socket (17) Place the terminal on a flat surface near the measuring module and protect it from intense light and heat Plug the connecting cable from the measuring module to the terminal (AK M-T) into the socket (18). 22 ba75446e04 06/2007

23 Commissioning System upgrades 16 Plug the external temperature probes into the sockets (15 and 16). 17 Plug the StirrOx G oxygen probe with integrated stirrer into socket (14). 18 Plug external printer/pc or recorder into socket (19). 19 Connect the external PC keyboard or barcode reader via the adapter cable AK T-K PS2 to socket (20). 20 Attach the rubber sleeve (6) onto the measuring module. Connecting the plug-in power supply The plug-in power supply unit supplies the terminal and the measuring module with low voltage. Warning The line voltage on site must lie within the input voltage range of the original plug-in power supply unit. Use original plug-in power supplies only (see chapter 15 TECHNICAL DATA) ba75446e04 06/

24 Commissioning 1 Insert the plug (22) into the socket (21) of the terminal. 2 Fit the country-specific adapter (23) onto the plug-in power supply (24). 3 Plug in the original WTW plug-in power supply (24) to an easily accessible wall socket. The system is in the standby mode. The display shows the date and time. 24 ba75446e04 06/2007

25 Commissioning 3.3 Switching on the measuring system After the plug-in power supply unit is connected and the initializing period is over, the measuring system switches to standby mode (Standby and the date and time are displayed). 1 Place the terminal and measuring module on a flat surface and protect them from intense light and heat. 2 Press the e key or [Online] on the terminal. The measuring module and probe are initialized. 3 As soon as the measuring module and probe have been initialized, a selection of user names is displayed. 4 Select a user name with 82.! Anonymous Login without password! Admin Login with password 5 Confirm the user profile with OK. 6 If necessary, enter the password with 82 and 46 and start the login with [OK]. 7 As soon as the measuring module and probe are initialized, a measured value appears on the display, e.g. the ph value. ba75446e04 06/

26 Commissioning 3.4 Settings To obtain the best results and to make use of the entire range of functions of the measuring system, the measuring system must be configured and calibrated. You can adapt the configuration to your measuring environment and your requirements via system settings and probe-dependent settings. System settings Probe-dependent settings The system settings include the following settings:! Date and time (chapter 5 SYSTEM SETTINGS)! Display options (chapter 5 SYSTEM SETTINGS)! Language selection(chapter 5 SYSTEM SETTINGS)! Data storage settings (chapter 11 DATA STORAGE)! Printer settings (chapter 12 DATA OUTPUT)! Temperature unit (section TEMPERATURE UNIT) Probe-dependent settings include, e.g.:! Selection of the measuring range! Selection of the display of various measured variables More detailed information is given in the descriptions of the individual measured quantities in the section SETTINGS (chapter 6 to chapter 10). Calibration More detailed information is given in the descriptions of the individual measured quantities in the section CALIBRATION (chapter 6 to chapter 10). 26 ba75446e04 06/2007

27 Commissioning 3.5 Updating the terminal software (firmware) The program "Firmware Update inolab Terminal 740 Vx.x" is used to update the firmware of the terminal. The newest firmware version can be downloaded from the Internet under Prerequisites:! PC with Windows 95, 98, or NT operating system! Minimum of 2 MB free storage! A free (serial) COM-interface! Interface cable, AK T-PC (see section 3.1 SCOPE OF DELIVERY) Note The update takes approx. 20 min Checking the version no. of the terminal firmware 1 Swap to offline mode with [Offline]. 2 Swap to the menu with [Menu]. 3 Select the Opt menu with Confirm the Opt menu with g. 5 Select the Setup menu with Confirm the Setup menu with g. 7 Select the Info... menu with Confirm the Info... menu with g. The Info window opens. The version number of the firmware appears next to Terminal : here "1.2". ba75446e04 06/

28 Commissioning Starting the update of the terminal firmware 1 Unplug the plug-in power supply and measuring module (active multifunction box) from the terminal. 2 Download the installation program for the firmware update, e.g. from the Internet. 3 Start the installation program for the firmware update. The program creates an entry in the Windows start bar (in the standard installation under Start / Programme / Firmware Update inolab Terminal V x.x..) 4 Start the update program. The Terminal Programming window opens and displays instructions for the update. 5 Select the required language for the installation program in the Language menu. 6 Change the COM interface displayed in the V24Parameter menu if necessary. 7 Plug the AK T-PC serial cable into the "RS232/REC" socket (19) on the terminal and connect with the interface (COM ) of the PC selected in the V24Parameter menu. 8 Plug the power supply into the terminal again. The Standby display appears. 28 ba75446e04 06/2007

29 Commissioning 9 Press g and hold it down. 10 Press [Offline]. 11 Release both keys. The Terminal Programming window shows the current status of the update (in %). 12 Wait for display to reach 100%. The firmware update has been carried out. 13 Briefly unplug the terminal from the supply voltage and plug it again. The Standby display appears. The instrument is ready for operation. ba75446e04 06/

30 Commissioning 30 ba75446e04 06/2007

31 Basic principles of operation 4 Basic principles of operation This section provides basic information on the operation of the measuring system and the display of the measured values. The terminal has two operating modes:! Display mode The display shows the current measured value. Change to the Menu mode using the [menu] softkey.! Menu mode The display shows open menus and submenus. For example, you can operate or set up the following functions here: - measuring functions - calibration functions - memory functions - printer/interface functions - general and system settings Return to the Display mode by pressing m or by pressing the [ESC] softkey several times. The measuring system is operated via the terminal. The AutoRead function and starting a measurement with AutoRead can also be operated from the measuring module. ba75446e04 06/

32 Basic principles of operation 4.1 Display The display shows measured values, active functions/settings, available softkey functions and a selection of measuring and display settings in the menu. Menu Measured variable, measured value, measured temperature value, temperature probe Status display indicators Softkey functions Below the display there are three softkeys to perform the displayed softkey functions Status display indicators Status display indicators show active functions/settings. h h flashes i jd jt B L x U v z y The AutoRead function is active A measurement with AutoRead is active AutoRange is active Automatic ph calibration with standard buffer solutions, prepared according to DIN 19267, is active Automatic ph calibration with technical buffer solutions is active Conventional ph calibration with buffer solutions is active Calibration of the conductivity set Calibration of an oxygen measuring set Calibration of the ion-sensitive measuring system Temperature probe is being used ph measurement only: Integrated temperature probe of a conductivity measuring cell is being used ph measurement only: Integrated temperature probe of a D. O. probe is being used 32 ba75446e04 06/2007

33 Basic principles of operation k n q D. O. measurement only: The salt content is taken into consideration. The salt content refers to the salinity according to the IOT table Conductivity measurement only: Temperature compensation "nlf" is active Conductivity measurement only: Temperature compensation "lin" is active 7 Conductivity measurement only: No temperature compensation "TC off" 3 Only when the StirrOxG D. O. probe with integrated stirrer is connected: Operating with the integrated stirrer 1 Only when the StirrOxG D. O. probe with integrated stirrer is connected: Displays an error on the socket of the stirrer (see also section 14.5) 0 Conductivity measurement only: T Ref = 20 C is selected as the reference temperature 5 Conductivity measurement only: T Ref = 25 C is selected as the reference temperature + With ion selective measurements only: Reference measurement active - With ion selective measurements only: Blank value correction active ba75446e04 06/

34 Basic principles of operation Softkey functions The currently available softkey functions are displayed above the corresponding softkeys. Softkeys are displayed in italics and in square brackets, e.g. [Menu]. p [Menu] [ESC] [Tab] [Next] [Ident] [RCL menu] [Open] [Start] [Ok] [X] Prints the current display contents (right-hand softkey only) Switches to the Menu mode (left-hand softkey only) Switches to the next higher menu level in the Menu mode, or quits the Menu mode (left-hand softkey only) Swaps between different displays that are open at the same time (e.g. graphical display - numerical measured value) Switches between the different input fields in an input window To input the ID of a measured value Opens a selection menu for stored measured values Opens a storage for input/output Starts a measurement Completes the entries Deletes the selected entry 34 ba75446e04 06/2007

35 Basic principles of operation Symbols in the Menu mode White script on a black background White script: (example: Baud rate 1200) Function/setting selected Black script on a white background Black script: (example: Baud rate 2400) Selectable function/setting; the function/setting can be selected by pressing 82 Tick Tick (example: Baud rate 4800 ) Active ( ) setting Arrow Arrow (example: Setup) After selecting and confirming by pressing g, a submenu with more functions/settings opens. Dots... Dots... (Example Cal Prot....) exists for this menu item:! A display with input field(s) (e.g. to enter the calibration interval), or! A special display (e. g. calibration records) ba75446e04 06/

36 Basic principles of operation Display of measured values The display shows measured values clearly by:! Detailed display of a measured value! Simultaneous display of two measured values! Graphical representation of the course of a series of measurements! Digital recorder display Display of a measured value Example: Display of the ph value. Display of two measured values (multiparameter measuring instruments) Example: Simultaneous display of ph and measured oxygen value. [Tab] The solid frame indicates the active measured value to which the active menu, submenu, functions and settings refer. You can alternately activate the measured value displayed on the left or on the right with [Tab]. 36 ba75446e04 06/2007

37 Basic principles of operation Graphical display Example: Graphical display of a ph graph. Digital recorder display Measurement datasets that you have stored with the AutoStore function (see section ) can be displayed in the form of a graph. Sections of the graph can be zoomed. You can print out the current display. Example: Digital recorder for measurement of the ph value. The digital recorder, like an analog recorder, records the current measured values continuously. The measured values are displayed graphically and numerically. ba75446e04 06/

38 Basic principles of operation 4.2 Keys The measuring system has a keypad on the terminal and one on the measuring module. The two keys mentioned below are located both on the terminal and on the measuring module:! a key to activate the AutoRead function! g key to start a measurement with AutoRead. An LED indicates whether the AutoRead function is active. If the measuring system is in the Display mode, the functions of the two keys on the terminal and on the measuring module are identical. In addition, you can also plug an IBM PC keyboard into the terminal. 38 ba75446e04 06/2007

39 Basic principles of operation Keys on the terminal Three softkeys (display-dependent function keys). The currently available function of the key appears on the display above the key. 2 Switches from the Menu to the Display mode or selects a measured variable 3 Starts a calibration procedure 4 Print LED (only on the terminal with integrated printer) red: printer off (offline) or malfunction green: printer ready for operation (online) 5 Switches the printer on/off (only on the terminal with integrated printer) 6 Paper feed/line feed (only on the terminal with integrated printer) 7 Increases or reduces values; Selects functions/settings in the Menu mode 8 Makes a selection in the Menu mode and confirms inputs in input fields 9 Saves a measured value manually 10 Activates/deactivates the AutoRead function 11 Switches the measuring system on/off 12 Displays/transmits measured values ba75446e04 06/

40 Basic principles of operation Keys on the measuring module RUN ENTER AR Status indicator of the AutoRead function LED off: AutoRead function is deactivated LED lights up: AutoRead function is activated LED flashes: AutoRead measurement has been started 14 Starts the AutoRead measurement (if the AutoRead function is activated) 15 Activates/deactivates the AutoRead function 40 ba75446e04 06/2007

41 Basic principles of operation IBM PC keyboard You can also operate the measuring system via an external keyboard. This enables the input of letters, e.g. for assigning names as identification (ID). The keys on the terminal are positioned to correspond to the keys on the function block of an IBM PC keyboard. Keyboard on the terminal Keys of an IBM PC keyboard In addition, the following keys of the PC keyboard have been allocated to the following functions on the terminal: PC keyboard Enter Tab Esc Terminal g Softkey [TAB] Softkey [ESC] Note To connect a PC keyboard to the terminal, you require the adapter cable AK T-K PS2. Switching the integrated printer on or off is only possible via the o key on the terminal (not via the PC keyboard). ba75446e04 06/

42 Basic principles of operation Barcode reader The entry of letters, e.g. for assignment of names as identification (ID) is also possible with a barcode reader. To connect a barcode reader to the terminal, you require the adapter cable AK T-K PS Menu The main menu line of the display contains four main menus.! The main Meas. menu contains the settings for measuring with the connected measuring module and sensor.! The main Cal menu contains the settings for calibrating the connected measuring module and probe.! The main Mem menu contains functions to store and display measured values and system configurations.! The main Opt menu contains general settings, e.g. for the temperature unit or time, and configurations of the terminal, e.g. of the display. Calling up the menu 1 Switch on the measuring system (see section 3.3). The display mode is active. The display shows a measured value (e.g. ph value). The [Menu] and p softkeys are available. 2 Change to the Menu mode with [Menu]. The last main menu used, e.g. Opt, is opened and the last menu item used, e.g. Setup, is selected. The [ESC] softkey is available. 42 ba75446e04 06/2007

43 Basic principles of operation Active ( ) function Selectable function A submenu with further settings is available Using a menu Action Key Switch to the next higher menu Press [ESC] Select a different main menu Press 46 Confirm the selected menu item Press g Select another menu item Press 82 Quitting a menu Action Switch to the next higher menu Switch to the Display mode Key Press [ESC] Press m How to operate the menu is explained in detail in the following example. ba75446e04 06/

44 Basic principles of operation Example Setting the temperature unit Starting point: ph measurement in the Display mode 1 Change to the Menu mode with [Menu]. 2 Use 46 to select the main Opt menu. 3 Select the Setup menu item with Confirm the Setup menu item with g. 5 Select the Temp Unit menu item with ba75446e04 06/2007

45 Basic principles of operation 6 Confirm the Temp Unit menu item with g. 7 Using 82, confirm the Celsius or Fahren setting. 8 Confirm the selected temperature unit with g. The selected temperature unit is active ( ). 9 Terminate the Menu mode with m. The temperature unit is shown on the display. ba75446e04 06/

46 Basic principles of operation 4.4 Output of measured data You can display measured values on the display graphically and numerically, and output them to a printer, an analog recorder, or a PC Measured data display on the screen Sample display Representation Numerical display Display of the current measured value and the measured temperature value. Graphical display Display of the measured data records stored with AutoStore in the form of graphs. The graph can be output to a printer (see chapter 12 DATA OUTPUT). Numerical display Display of the measured data records stored with AutoStore in the form of lists. The values can be output to a printer (see chapter 12 DATA OUTPUT). Digital recorder The digital recorder shows the current measured values in the form of a graph on the display (and the internal printer). 46 ba75446e04 06/2007

47 Basic principles of operation Measured data output on the integrated printer On a terminal with integrated printer, you can output all displays directly to the internal printer. In order to print measured data records, it is necessary to configure the printer. The detailed settings of the menu can be found in chapter 12 DATA OUTPUT. If the internal printer is switched on, start the output of individual measured data records with the p softkey. Printing data from the memory is started via Print functions in the menu. If the digital recorder is on, the course of the measurement is shown as a graph on the display. Simultaneously, you can output the graphical display on the integrated printer Outputting measured data to the RS232/REC interface Via the RS 232 interface, you can output numerical measuring data to an external printer, an analog recorder or a PC. Note If you output the data to a PC, you can easily transfer the data to a database (see section ). ba75446e04 06/

48 Basic principles of operation 48 ba75446e04 06/2007

49 System settings 5 System settings 5.1 Date and time A real-time clock is integrated in the system. The date and time appear both on the display and in printouts. The clock is buffered against power failures by two batteries (for information on how to change the batteries, see section 13.1 MAINTENANCE). 1 Switch to the Menu mode. 2 Select the main Opt menu with Select the Setup menu item with Confirm the Setup menu item with g. 5 Select the Time... menu item with Confirm the Time... menu item with g. The Date/Time window appears on the display. The input field for hours is marked in the Time line. 7 Option: Switch between the individual digits with Increase or decrease the number with Press [Next] to change to the next input field (hour - minute - day - month - year). 10 Complete the input of time and date. 11 Terminate the Menu mode with [ESC]. ba75446e04 06/

50 System settings 5.2 Changing the language 1 Switch to the Menu mode. 2 Select the main Opt menu with Select the Setup menu item with Confirm the Setup menu item with g. 5 Select the Language menu item with Confirm the Language menu item with g. 7 Select the English or German language with Confirm the language selection with g. The language is activated ( ). 9 Terminate the Menu mode with m. 10 Switch off the terminal with o. 11 Switch on the terminal again with o. Display texts appear in the selected language. 50 ba75446e04 06/2007

51 System settings 5.3 Display settings To adjust the quality of the display to the ambient light, you can adjust the contrast of the display in 10 steps and switch on a background display illumination if necessary Display contrast Setting the display contrast 1 Switch to the Menu mode. 2 Select the main Opt menu with Select the Setup menu item with Confirm the Setup menu item with g. 5 Select the Display menu item with Confirm the Display menu item with g. 7 Select the Contrast... menu item with Confirm the Contrast... menu item with g. The Display Contrast input window appears on the display. The input field Input: 0-9 is selected. 9 Increase or decrease the number to the required contrast with Confirm the input with g. The display contrast has been set up. 11 Terminate the input with [ESC]. The Menu mode is terminated. ba75446e04 06/

52 System settings Display illumination Switching the display illumination on/off 1 Switch to the Menu mode. 2 Select the main Opt menu with Select the Setup menu item with Confirm the Setup menu item with g. 5 Select the Display menu item with Confirm the Display menu item with g. 7 Select the BckLight menu item with Confirm the BckLight menu item with g. The display illumination is switched on ( ). 9 To switch off the display illumination: Confirm the BckLight menu item with g. The display illumination is off. The symbol behind BckLight disappears. 10 Terminate the Menu mode with m. 52 ba75446e04 06/2007

53 System settings 5.4 Acoustic signals You can select which events are to trigger an acoustic signal:! Warning messages (Signal)! When measuring range limits are exceeded (Limit)! Each time a key with no function is pressed (no func) You can select several options at the same time. Selecting acoustic signals 1 Switch to the Menu mode. 2 Select the main Opt menu with Select the Setup menu item with Confirm the Setup menu item with g. 5 Select the Signal menu item with Confirm the Signal menu item with g. 7 Select the Signal, Limit or no func menu item with Confirm the selected menu item with g. The selected acoustic signal is active ( ). 9 Option: Activate further acoustic signals ( ). 10 Leave the Menu mode with [ESC]. ba75446e04 06/

54 System settings 5.5 Temperature The temperature is very important for the reproducibility of measured values. You can select the unit of the temperature display. The temperature is determined automatically via an external temperature probe or a temperature probe integrated in the probe. It is also possible to enter measured temperature values manually Temperature unit You can display temperature values in C (degrees Celsius) or F (degrees Fahrenheit). 1 Switch to the Menu mode. 2 Select the main Opt menu with Select the Setup menu item with Confirm the Setup menu item with g. 5 Select the Temp Unit menu item with Confirm the Temp Unit menu item with g. 7 Use 82 to select the required temperature unit Celsius or Fahren. menu item with Confirm the selected menu item with g. The selected temperature unit is active ( ). 9 Terminate the Menu mode with m. 54 ba75446e04 06/2007

55 System settings Measuring the temperature For reproducible measurements, it is imperative to determine the respective temperature values. The measuring system obtains the temperature value from:! a temperature sensor integrated in the sensor,! a temperature sensor integrated in another sensor (applies to the modules, ph/oxi, ph/cond, Multi),! an external NTC30 or Pt1000 temperature sensor (Pt1000 for the ph and Cond modules only), or! by entering a measured temperature value manually. The temperature probe that is used is indicated on the display by v, y, or z. Using the temperature probe integrated in the probe Using the temperature probe of another probe (multi-parameter measuring instruments) When you use probes with an integrated temperature probe, the measured parameter and temperature are always measured simultaneously. If the integrated temperature probe is identified, the measured temperature value and the status v appears on the display. If no temperature probe is available for ph/ise measurements, the temperature can be measured by the integrated temperature probe of another probe (oxygen probe or conductivity measuring cell). To do so, proceed as follows: 1 Immerse the D. O. probe or conductivity measuring cell into the test sample. 2 Switch to the Menu mode. 3 Select the main Meas menu with Select the ph setup menu item with Confirm the ph setup menu item with g. 6 Select the O2/Cond TP menu item with Confirm the O2/Cond TP menu item with g. The temperature measurement is active ( ). ba75446e04 06/

56 System settings 8 Terminate the Menu mode with m. y or z appears on the display so you can check your setting. Using an external temperature probe If you want to measure the temperature using an external temperature probe, proceed as follows: 1 Connect the temperature probe to the measuring module. 2 Immerse the temperature probe in the test sample. The measured temperature value is displayed. Entering the temperature value manually If you want to enter the temperature manually instead of measuring it automatically, proceed as follows: 1 Measure the current temperature of the test sample. 2 Call up the Display mode with m. 3 Call up the ph measured variable with Call up the entry field for the temperature value with Option: Switch between the individual digits with Set up the temperature value with Confirm the temperature value with g. 8 Terminate the input with [ESC]. The display shows the temperature value that was selected. 56 ba75446e04 06/2007

57 System settings 5.6 User profiles All documented measurement or calibration data are output together with the user name of the provider. User profiles contain the user name and the authorization assigned to the user. Name Access Authorization Admin Anonymous Selfcreated user profiles protected by a password free protected by a password! to measure all measured variables! to calibrate all measured variables! to change all settings! to save all settings! to enable/disable the login with the user name, Anonymous! to set up/delete user profiles! to measure all measured variables! to calibrate all measured variables! to change all settings! to save all settings Setting: none! to measure all measured variables! to calibrate all measured variables! to change all settings! to save all settings Setting: ! to measure one measured variable! to calibrate one measured variable! to change the setting of one measured variable. The administration of user profiles is only possible if a user logs in with the user name, Admin. Note The user name Anonymous provides rapid access to the ba75446e04 06/

58 System settings measuring system without having to enter a password. The administrator can disable or enable this access (see section 5.6.3). The password "0001" is the default setting for the user name Admin when the instrument is delivered. The administrator (login with the user name Admin) administrates user names and authorizations (see section 5.6.3):! enabling/disabling the login with the user name, Anonymous! creating a user profile! changing a user profile! deleting a user profile! printing out the list of user profiles 58 ba75446e04 06/2007

59 System settings Opening the Administration menu 1 Swap to standby mode with e. 2 Swap to offline mode with [Offline]. 3 Select the user name Admin with Confirm the user name with [OK]. 5 Input the password for the user name with 82 and Confirm the password with [OK]. Access to the settings in the offline mode is opened. 7 Switch to the menu mode with Menu. 8 Select the Opt menu with Select the User menu item with Confirm the User menu item with g Opening the Administration window 1 Open the User menu (see section 5.6.1). 2 Select the Administration menu item with Confirm the Administration menu item with [OK]. The Administration window opens. ba75446e04 06/

60 System settings Creating, editing, or deleting a user profile Enabling/disabling the user profile, Anonymous 1 Open the Administration window (see section 5.6.2). 2 Select the user name Anonymous with Select the user name Anonymous with [OK]. A prompt appears for changing the present setting. 4 Select Yes with [Next]. 5 Confirm the change with g. The OFF status appears in the field next to Anonymous in the Administration window. The login with the user name Anonymous is disabled. Creating a user profile 1 Open the Administration window (see section 5.6.2). 2 Select the??? entry with Confirm the??? entry with [OK]. A dialog for the input of a new user profile opens. 4 Enter a user name. 5 Swap to the Setting field with [Next]. 6 Select one of the settings None or with Confirm the Name and Setting with [OK]. The new user profile appears in the Administration window. Note If no setting with the selected number is yet stored, a message appears when the user profile is stored. Save a setting (see section 11.2). It is not possible to log in with a user name without a valid setting. Changing a user profile 1 Open the Administration window (see section 5.6.2). 2 Select a user name with Confirm the user name with [OK]. A dialog opens for changing the Name or Setting of the user profile. 4 Swap to the Setting field with [Next]. 60 ba75446e04 06/2007

61 System settings 5 Select one of the settings with Confirm the Name and Setting with [OK]. The changed user profile appears in the Administration window. Deleting a user profile 1 Open the Administration window (see section 5.6.2). 2 Select a user name with Delete the user profile with [X]. A security prompt opens for deleting the user profile. 4 Select Yes with [Next]. 5 Confirm the deletion with g. The user name is deleted from the list of user names in the Administration window Printing the list of user profiles The administrator (login with the user name, Admin) can print out a list of current user profiles or all user profiles. The list of current user profiles (Current) contains the user profiles which can be used for login. The list of all user profiles (Complete) contains all current and all deleted user profiles, which have been used for at least one login. 1 Open the User menu (see section 5.6.1). 2 Select the Print menu item with Confirm the Print menu item with [OK]. The list of user profiles is printed. 4 Use 82 to select the Current or Complete menu item. 5 Confirm the selection with [OK]. The list of user profiles is printed. Note A consecutive number for each user profile is also assigned internally. ba75446e04 06/

62 System settings 5.7 Password for user names The login with the user name Admin and all self-created user names is protected by a password. Each terminal is delivered with the password "0001" for the user name, Admin. Change this password as soon as possible Changing the password The password has 4 numerical digits. The password "0000" is not allowed. 1 Swap to standby mode. 2 Swap to the selection of the user name with [Online] or [Offline]. 3 Select a user name with Confirm the selection of the user name with [OK]. The dialog for the password input opens. 5 Swap to the Change current field with [Next]. 6 Input the current password with 82 and Swap to the Change new field with [Next]. 8 Input a new four-digit password with 82 and Confirm the new password with [OK]. The display swaps to the online or offline display. The password is changed. 62 ba75446e04 06/2007

63 System settings Assigning a password As long as no login has yet been made with a new user name, this user name is displayed in brackets in the list of user names. The user specifies the password when he first logs in with the new user name. Note No access to this user profile is possible without this password. 1 Swap to standby mode. 2 Swap to the selection of the user name with [Online] or [Offline]. 3 Select the new user name (name in brackets) with Confirm the selection of the user name with [OK]. The dialog for the password input opens. 5 Input a four-digit password with 82 and 46. Note The password has 4 numerical digits. The password "0000" is not allowed. 6 Confirm the password with g. The display swaps to the online or offline display Forgotten the password? Self-created user profile It is not possible to log in with this user name without a password. The administrator can delete and recreate the user profile (see section 5.6.3). Admin In emergencies, it is also possible to log in with the user name Admin using a special enabling code obtained from WTW GmbH. The address and telephone number of WTW GmbH is given on the cover page of this operating manual. ba75446e04 06/

64 System settings 5.8 Modules The calibration data can only be assigned to a user name if the calibration data were recorded with the current combination of terminal and module. As a result of the registration of the modules, the terminal recognizes whether the calibration data were stored in the module with this or another terminal. The registration of a module to a terminal is made automatically in the first calibration of a module at a terminal. If a module is registered at a terminal, the user name with which the calibration was performed appears on the display during the prompt of a calibration protocol, and the module appears in the Registered modules list. This list contains all registered modules with the module type and serial number. If a module is not registered at a terminal, a note together with unknown as the user name appears on the display during the prompt of a calibration protocol. Note The maximum number of registered modules is 16. Further modules are not registered. Calibrations are nevertheless possible. Anonymous appears as the user name. Viewing, printing out and editing the list of Registered modules is only possible during login with the user name Admin. 1 Open the Administration menu (see section 5.6.1). 2 Select the Module menu item with Confirm the Module menu item with [OK]. The Module register window opens. 64 ba75446e04 06/2007

65 System settings Deleting a module 4 Select a Module menu item with Delete the selected Module with [X] or Print out the list of registered modules 6 Print out the list of Modules with [PRINT]. ba75446e04 06/

66 System settings 66 ba75446e04 06/2007

67 ph 6 ph Measuring modules for the : ph, ph/ion, ph/cond and Multi. 6.1 Settings for ph We recommend checking the current settings and correcting them if necessary before a measurement Displaying ph/ise or measured voltage values For ph measurements, the enables rapid switching between the display of the ph value (ph) and the voltage (U). 1 Activate the Display mode. 2 Switch to the display of the ph value with m. 3 Switch between the measured value display of the ph value (ph) and voltage (U) with Setting the ph display ph electrodes are connected to the same connector on the measuring module. The selection of the measured variable ISE or ph is made in the main Meas menu. The active ph or ISE setting is marked with. Measured variable, ph 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ph menu item with 82. ba75446e04 06/

68 ph 4 Confirm the ph menu item with g. The ph display is active ( ). 5 Terminate the Menu mode with m. The ph value appears on the display Measured value resolution of voltage display Using the U-AutoRng function, you can select the resolution of the voltage measurement:! If U-AutoRng is not active, voltages in the range of to mv are measured with a resolution of 1 mv.! If U-AutoRng is active, voltages in the range of mv to mv are measured with a resolution of 0.1 mv. The rest of the measuring range remains unchanged. Note If you expect voltages outside the range mv to mv and want to connect a recorder, deactivate U-AutoRange. Otherwise, the recorder scaling at the range limits will change. Measured value resolution, U 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ph setup menu item with Confirm the ph setup menu item with g. 5 Select the U-AutoRng menu item with Confirm the U-AutoRng menu item with g. The U-AutoRng function is active ( ). Voltages in the range between and are displayed with a resolution of 0.1 mv. 7 Terminate the Menu mode with m. 68 ba75446e04 06/2007

69 ph Measured value resolution of ph display You can select the resolution for the ph value:! If the high resolution (ph high resol. ) is switched on, measurement is carried out over the entire ph range with a resolution of ! If the high resolution (ph high resol.) is switched off, measurement is carried out over the entire ph range with a resolution of Measured value resolution, ph 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ph setup menu item with Confirm the ph setup menu item with g. 5 Select the ph high resol. menu item with Confirm the ph high resol. menu item with. The resolution is active ( ). 7 Terminate the Menu mode with m. ba75446e04 06/

70 ph Resetting to default settings You can reset (initialize) the settings for the ph measurement to the default settings. In a reset, the following functions for the ph measurement are reset to the default settings: Measuring mode Asymmetry U Asy in mv Slope S (k) in mv Calibration procedures ph 0 mv mv AutoCal TEC Temperature, manual 25 C ph reset With the reset ph function, all the settings for ph measurements are reset to the default values. 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Reset ph menu item with Confirm the selected menu item with g. The default settings for ph measurements have been restored. The Menu mode is terminated. 70 ba75446e04 06/2007

71 ph Why calibrate? When to calibrate? AutoCal ConCal AutoRead Calibration record 6.2 Calibrating ph measurements ph electrodes age. This changes the asymmetry and slope of the ph electrode. This may cause the measuring system to ignore the limits of a calibrated system. Calibration determines the current values of the asymmetry and slope and stores them in the measuring module. Calibration must be performed at regular intervals.! After connecting another electrode! When the sensor symbol flashes: after expiry of the calibration interval after a voltage interruption, e.g. battery change You can choose between two calibration procedures: AutoCal and ConCal: is a fully automatic calibration using the datasets selected for buffer solutions in the ph buffer menu. The buffer solutions are automatically recognized by the measuring instrument. Depending on the instrument setting (see page 74), the instrument displays the relevant buffer nominal value or the current electrode voltage in mv. The calibration can be terminated after the first buffer solution. This corresponds to a single-point calibration. is the conventional two-point calibration method using two buffer solutions (ph 7.0 ± 0.5 and any other buffer solution) or a single-point calibration using any buffer solution that is used as a high-speed method. When calibrating with AutoCal, the AutoRead function is automatically activated. The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing g. The calibration record contains the calibration data of the current calibration. You can call up the calibration record by outputting the data storage (section 11.3). Note You can automatically print a calibration record following calibration. To do so, switch on the printer before calibrating (print LED lights up green). After a valid calibration, the record is printed. ba75446e04 06/

72 ph Sample printout: ph calibration Cal Date: Cal Time: 22:46 Cal Interval: 7 days AutoCal TEC Tman AR Buffer Buffer Buffer Buffer C mv 25 C C mv 25 C C1 0.2 mv 25 C C mv 25 C S -58.2mV/pH ASY 0 mv Sensor +++ User: xxxxxx Calibration evaluation After the calibration, the measuring module automatically evaluates the current status of the system. The asymmetry and slope are evaluated separately. The displayed probe symbol shows the worse-case evaluation of both variables.. Display Asymmetry [mv] Slope [mv/ph] or Clean the electrode according to the electrode operating manual or E3 Eliminate the error according to chapter 14 WHAT TO DO IF... < -30 or > or ba75446e04 06/2007

73 ph Buffer sets Before each calibration, it is necessary to inspect the selected calibration procedure and the buffer sets used. You can use the following buffer sets at the specified temperatures for an automatic calibration. * Buffer set Menu designation ph values at temp WTW technical buffer solutions Buffer TEC * 25 C Standard buffer solutions according to DIN Merck company Titrisole buffers and buffer solutions Riedel de Haen company Fixanale buffers and buffer solutions Merck company Titrisole buffers and buffer solutions Riedel de Haen company Fixanale buffers and buffer solutions Merck company ready-made buffer solutions Buffer DIN Buffer Mrk Buffer Mrk Buffer Mrk C 20 C 20 C 20 C * The calibration for ph is optimized for the WTW technical buffer solution TEP 10 Trace or TPL 10 Trace. Other buffer solutions can lead to an erroneous calibration. The correct buffer solutions are given in the WTW catalog or in the Internet. ba75446e04 06/

74 ph Calibration settings Selecting the calibration procedure The following calibration procedures can be selected:! AutoCal AutoCal [mv] displays the current electrode voltage in mv during calibration AutoCal [ph] displays the respective nominal buffer value during calibration! ConCal 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the ph caltype menu item with Confirm the ph caltype menu item with g. 5 Use 82 to select the AutoCal, AutoCal [ph] or ConCal menu item. 6 Confirm the selected menu item with g. The selected calibration procedure is active ( ). Selecting the buffer data record For each calibration procedure, you can select between the buffer datasets TEC, DIN and Mrk: 7 Select the ph Buffer menu item with Confirm the ph Buffer menu item with g. 9 Select the Buffer TEC, Buffer DIN or Buffer Mrk menu item with ba75446e04 06/2007

75 ph 10 Confirm the selected buffer data record with g. The selected setting is active ( ). 11 Terminate the Menu mode with m. Calibration interval The calibration interval determines the time interval between regular system calibrations. The terminal reminds you to calibrate regularly by the flashing probe symbol on the display. The calibration interval is set to 7 days in the factory. You can change the interval (1-999 days). For most applications, we recommend a shorter calibration interval. 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Use 82 to select the Cal Int.... menu item. 4 Use g to confirm the Cal Int.... menu item. The Calibration interval entry window appears. 5 Option: Switch between the individual digits with Increase or reduce the value with Confirm the value for the calibration interval with g. 8 Use [ESC] to terminate the Menu mode. ba75446e04 06/

76 ph Selecting the unit for the slope The slope determined during calibration can be displayed in the unit, mv/ph or %. The display in % refers to the Nernst slope, 59.2 mv/ph (100 x the slope determined/nernst slope). 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Use 82 to select the ph Caltyp menu item. 4 Use g to confirm the ph Caltyp menu item. 5 Use 82 to select the Slo[%] menu item. 6 Use g to confirm the Stg[%] menu item. The display of the slope in % is active ( ). 7 Use m to terminate the Menu mode. 76 ba75446e04 06/2007

77 ph Calibration Preparatory activities 1 Use m and/or 46 to display the ph value. 2 Connect the ph electrode to the measuring module. 3 Keep the buffer solutions ready (up to 5 solutions, depending on the selected calibration procedure). 4 Adjust the temperature of the solutions and measure the temperature if measurement is made without a temperature probe. Note During calibration without a temperature probe, set the current temperature of the respective buffer solution manually (see section 5.5.1). If you use a temperature probe, it is not necessary to enter the temperature manually. AutoCal calibration For the AutoCal procedure, use buffer solutions according to the buffer table (see section 6.2.1). During calibration, the display shows both the calibration procedure and the number of the next buffer solution before a new buffer solution is used. The display, e.g. ct1 here, has the following meaning: c:the calibration has been started. t: Selected buffer dataset t = Technical buffer or d = DIN buffer or m = Merck buffer Possible values: t, d, m 1: No. of the next buffer solution 1 = 1st buffer solution 2 = 2nd buffer solution 3 =..., etc. Possible values: The following example covers the autocalibration procedure using WTW technical buffer solutions. If you use other buffer solutions, e. g. DIN buffers or buffer solutions of the Merck company, the displays before using the next buffer will be different. Note During calibration, always use the ph buffer solutions in ascending order. ba75446e04 06/

78 ph 1 Select the AutoCal calibration procedure (see section 6.2.2). 2 Select the buffer data record (see section 6.2.1). 3 Perform the preparatory activities (see section 6.2.3). 4 Start the calibration procedure with c. ct1 appears on the display. 5 If necessary, set the temperature of the first buffer solution with 82 (see section 5.5.2). 6 Immerse the electrode and the temperature probe in the first buffer solution. 7 Start the measurement with g. The h display indicator flashes. The electrode voltage (U in mv) appears on the display. As soon as a stable value is reached, the display h no longer flashes. ct2 appears on the display. 8 Thoroughly rinse the electrode with deionized water. 9 If necessary, set the temperature of the second buffer solution with 82 (see section 5.5.1). 10 Immerse the electrode and the temperature probe in the second buffer solution. 78 ba75446e04 06/2007

79 ph 11 Start the measurement with g. The h display indicator flashes. The electrode voltage (mv) appears on the display. As soon as a stable value is reached, h disappears. The slope value (mv/ph) and the asymmetry value (mv) appear on the display. The probe symbol shows the calibration evaluation after the two-point calibration. 12 Use g to go on to the three-point calibration (ct3 appears on the display) or terminate after the two-point calibration with m (the current calibration data are stored). Three-point calibration 13 Thoroughly rinse the electrode with deionized water. 14 If necessary, set the temperature of the third buffer solution with 82 (see section 5.5.1). 15 Immerse the electrode and the temperature probe in the third buffer solution. 16 Press the g key. The h display indicator flashes. The electrode voltage (mv) appears on the display. As soon as a stable value is reached, h disappears. The probe symbol shows the calibration evaluation after the three-point calibration. The value of the slope S (in mv/ph) and the value of the asymmetry (in mv) appear on the display. ba75446e04 06/

80 ph 17 Use g to go on to the four-point calibration (ct4 appears on the display) or terminate after the three-point calibration with m (the current calibration data are stored). Four-point calibration 18 Thoroughly rinse the electrode with deionized water. 19 If necessary, set the temperature of the fourth buffer solution with 82 (see section 5.5.1). 20 Immerse the electrode and the temperature probe in the fourth buffer solution. 21 Press the g key. The h display indicator flashes. The electrode voltage (mv) appears on the display. As soon as a stable value is reached, h disappears. The probe symbol shows the calibration evaluation after the four-point calibration. The value of the slope S (in mv/ph) and the value of the asymmetry U Asy (in mv) appear on the display. 22 Press the g key. The ph value and the probe symbol appear on the display. The system is calibrated for ph measurements. 80 ba75446e04 06/2007

81 ph Note The calibration line is determined by linear regression. After the calibration is finished, the calibration record is automatically printed if the printer is ready for operation. Information on setting up a printer and on the printout of further calibration protocols is given in chapter 12 DATA OUTPUT and section PRINTING. ConCal single-point calibration ConCal two-point calibration Only one buffer solution is required for single-point calibration. The ph value should lie as close as possible to the expected measured value. Only the electrode asymmetry is then newly determined. The slope of the last two-point calibration is retained. Use the following buffer solutions:! ph 7.0 ± 0.5! Any other buffer solution so that the measuring range is covered as well as possible Note The ConCal calibration procedure has no temperature compensation. The buffer solutions must have the correct temperature. If you use a temperature probe, it is not necessary to enter the temperature manually. 1 Select the ConCal calibration procedure (section 6.2.1). 2 Perform the preparatory activities (see section 6.2.3). 3 Start the calibration procedure with c. 4 Immerse the electrode and the temperature probe in the ph 7.0 ± 0.5 buffer solution. 5 If necessary, set the temperature of the first buffer solution with Use [Adj. Asy.] to call up the input field for the nominal ph value of the buffer solution. 7 Use 82 (and 46) to select the nominal ph value of the buffer solution (at the current temperature). 8 Confirm the nominal ph value with g. 9 Use [ESC] to leave the input field for the nominal ph value. 10 Use g to display the slope (mv/ph), the asymmetry (mv), and the calibration evaluation (probe symbol). ba75446e04 06/

82 ph 11 Use g to go on to the two-point calibration or terminate after the single-point calibration with m (the present calibration data remain stored). Two-point calibration 12 Thoroughly rinse the electrode with deionized water. 13 Immerse the electrode and the temperature probe in the second buffer solution. 14 If necessary, set the measured temperature value of the second buffer solution with Use [Adj. Asy.] to call up the input field for the nominal ph value of the buffer solution. 16 Use 82 (and 46) to select the nominal ph value of the buffer solution (at the current temperature). 17 Confirm the nominal ph value with g. 18 Use [ESC] to leave the input field for the nominal ph value. 19 Press the g key. The slope S (in mv/ph), asymmetry U Asy (in mv) and calibration valuation (probe symbol) appear on the display. 20 Press the g key. The calibration is finished. 82 ba75446e04 06/2007

83 ph Note After the calibration is finished, the calibration record is automatically printed if the printer is ready for operation. Information on setting up a printer and on the printout of further calibration protocols is given in chapter 12 DATA OUTPUT and section PRINTING. Preparatory activities 6.3 Measuring the ph value Perform the following preparatory activities when you want to measure: 1 Connect the electrode to the measuring module. 2 Call up the Display mode with m. 3 Call up the ph measured value display with Adjust the temperature of the solutions and measure the current temperature if the measurement is made without a temperature probe. 5 With manual temperature input: Use 82 to call up the temperature input field and adjust the temperature. Use [ESC] to terminate the temperature input. 6 Calibrate or check the measuring system with the electrode. 7 Switch to the measuring mode with m. Note Incorrect calibration of ph electrodes leads to incorrect measured values. Calibrate regularly. The measuring system has to be calibrated before measuring. Temperature probe You can measure with or without a temperature probe. If a temperature probe is connected, it is indicated on the display by v. Note If you use a ph electrode without temperature probe, you can also use the temperature probe of a D. O. probe or a conductivity measuring cell (see section MEASURING THE TEMPERATURE). If you use the temperature probe of a D. O. probe or a conductivity measuring cell, y or z appears on the display. 1 Perform the preparatory activities. 2 Immerse the ph electrode in the test sample. The display shows the current measured value. ba75446e04 06/

84 ph AutoRead (drift control) The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable effect on the reproducibility of the measured value. With identical measuring conditions, the maximum deviation is Call up the Display mode with m. 2 Call up the ph measured variable with Immerse the ph electrode in the test sample. 4 Activate the AutoRead function with a. The h display indicator appears. The current measured value is frozen (hold function). 5 Start the AutoRead measurement with g. The h AR display indicator flashes. When a stable signal is reached, an acoustic signal is heard and h stops flashing. 6 If necessary, start the next AutoRead measurement with g. 7 To terminate the AutoRead function: Press the a key. Note In order to accept the current measured value without waiting for the end of the AutoRead function, press g on the terminal or on the measuring module. You can only change to another measured variable after completion of the AutoRead function. 84 ba75446e04 06/2007

85 ph 6.4 Measuring the ORP voltage The measuring system can measure the ORP voltage of a solution in conjunction with a ORP electrode, e.g. SenTix ORP. 1 Call up the Display mode with m. 2 Call up the measured variable U with Submerse the ORP electrode in the sample. 4 Wait for a stable measured value. Note Note that, when measuring voltages, it can take a long time (even several hours) until the measured value becomes stable. ORP electrodes are not calibrated. However, you can check ORP electrodes using a test solution. ba75446e04 06/

86 ph 86 ba75446e04 06/2007

87 Ion concentration 7 Ion concentration For the measuring modules: ph, ph/ion, ph/cond and Multi. 7.1 Settings for ISE We recommend checking the current settings and correcting them if necessary before a measurement Displaying ph/ise or measured voltage values In ph/ise measurements, enables a rapid changeover between the display of the ph/ise value (ph) and voltage (U). 1 Activate the Display mode. 2 Switch to the display of the ph/ise value with m. 3 Switch between the measured value display of the ph/ise value (ph) and voltage (U) with Setting up the ISE display Ion-selective electrodes are connected to the ph/u connector of the measuring module. The selection of the measured variable ISE or ph is made in the main Meas menu. The active ph or ISE setting is marked with. Measured variable, ISE 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ISE menu item with Confirm the ISE menu item with g. The ISE display is active ( ). 5 Terminate the Menu mode with m. The ion concentration appears on the display (mg/l). ba75446e04 06/

88 Ion concentration Determining the measuring range You can select the measuring range manually or have it selected automatically. We recommend setting the measuring range manually when the intended measurement is output to a recorder at the same time. You can determine the measuring range for measuring the conductivity as follows:! Automatic selection of the measuring range (AutoRange)! Manual selection between the following measuring ranges: Concentration [mg/l] Measuring range 1 (Resolution) (0.001) Measuring range 2 (Resolution) (0.01) Measuring range 3 (Resolution) (0.1) Measuring range 4 (Resolution) (1) Note If you are using a recorder, we recommend deactivating the AutoRange function. Specify the expected measuring range manually. Otherwise, the recorder scaling will change to a different range due to the switchover. Manual selection of the measuring range The AutoRng function has to be switched off for the manual selection of the measuring range. 1 Switch to the Display mode. 2 Use 46 to select the required measuring range. 88 ba75446e04 06/2007

89 Ion concentration Automatic switch-over of the measuring range 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ISE setup menu item with Confirm the ISE setup menu item with g. 5 Select the AutoRng menu item with Confirm the AutoRng menu item with g. i appears on the display. 7 Terminate the Menu mode with m Measured value resolution of voltage display See section Resetting to default settings No default settings are specified for ion-selective measurements. ba75446e04 06/

90 Ion concentration 7.2 Advanced settings for ISE For the ph/ion measuring module Units of the ISE display You can select the units of the measured value: 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ISE menu item with Select the ISE setup menu item with Confirm the ISE setup menu item with g. 6 Select the Unit menu item with Confirm the Unit menu item with g. 8 Select a Unit with Confirm the Unit with g. The selected Unit is active ( ). 10 If mg/l was selected: Continue with step If mol/l was selected: Select a Ion type with 82. Continue with step If mg/kg, ppm, % was selected: Enter the density of the sample with 82. Continue with step Confirm the entry with g or [ESC]. The units change over. 14 Switch to the measured value display. 90 ba75446e04 06/2007

91 Ion concentration Blank value correction (Bw Corr) If the ion concentration in the sample is so small that it does not lie in the linear range of the electrode, you can increase the ion concentration in the linear range with the blank value correction by the addition of a blank value solution. The displayed measured value is the difference between the actual measured value and the determined blank value. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ISE menu item with Confirm the ISE menu item with g. 5 Select the ISE setup menu item with Confirm the ISE setup menu item with g. 7 Select the Bw Corr menu item with Confirm the Bw Corr menu item with g. The Bw Corr function is active ( ). The flashing - symbol appears on the measured value display. 9 Perform a calibration (see section 7.3). 10 Use m to finish the calibration. The prompt for the measurement of the blank value appears. 11 Thoroughly rinse the electrode with deionized water. 12 Immerse the electrode in the blank value solution. 13 Select Yes with [Next]. 14 Confirm Yes with g. 15 Terminate the blank value determination with [ESC]. The - symbol no longer flashes. The displayed measured value is reduced by the blank value. The blank value correction is active until the blank value is switched off. ba75446e04 06/

92 Ion concentration Reference measurement (Ref Meas) A reference measurement enables you to assign the voltage value 0 mv to the calibration curve of your electrode for a specific ion concentration (reference concentration). Prerequisite:! The measured value display must show the voltage.! A valid calibration must be available. 1 Switch to the Display mode. 2 Only if no valid calibration is available (no sensor symbol on the measured value display): Perform a calibration (see section 7.3). 3 Switch to the display of the voltage (U) with m. 4 Switch to the Menu mode. 5 Use 46 to select the main Meas menu. 6 Select the ISE menu item with Confirm the ISE menu item with g. 8 Select the ISE setup menu item with Confirm the ISE setup menu item with g. 10 Select the Ref Mess menu item with Confirm the Ref Meas menu item with g. The Ref Mess function is active ( ). The - symbol flashes on the measured value display. 12 Switch to the measured value display with m. 13 Open the input field for temperature and reference concentration with Select the input field R with [Next]. 15 Enter the reference concentration R with Use [ESC] to leave the input field. The measured voltage value is referred to the new reference concentration. 92 ba75446e04 06/2007

93 Ion concentration Criterion for AutoRead (AutoRead) The AutoRead criteria affect the reproducibility of the measured values. The following criteria can be adjusted:! high: highest reproducibility! medium: medium reproducibility! low: lowest reproducibility Note Increasing reproducibility also causes the response time to increase until a measured value is evaluated as stable. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the ISE menu item with Confirm the ISE menu item with g. 5 Select the ISE setup menu item with Confirm the ISE setup menu item with g. 7 Select the AutoRead... menu item with Confirm the AutoRead... menu item with g. The setting of the criterion for AutoRead opens. 9 Select the setting for AutoRead with Leave the setting for AutoRead with [ESC]. The setting of the criterion for AutoRead is active. ba75446e04 06/

94 Ion concentration Why calibrate? 7.3 Calibration for ion-selective measurements Ion-selective electrodes age and are temperature-dependent. This changes the slope. Calibration determines the current slope of the electrode and stores it in the measuring system. Thus, you should calibrate before each measurement and at regular intervals. Note For calibration, use tempered standard solutions with a temperature that differs by a max. of ± 2 C from the temperature of the test sample. When to calibrate? ISECal AutoRead Display ISE temp? Calibration record! Before any concentration measurement if possible! After connecting another electrode! When the sensor symbol flashes after a voltage disconnection, e.g. battery change This is the conventional two-point or three-point calibration procedure that uses 2 or 3 freely selectable standard solutions. The concentration expected in the measurement determines the concentration of the calibration standards to be selected. The calibration procedure automatically activates the AutoRead function. In order to accept the current measured value without waiting for the end of the AutoRead function, simply press g. If you are using a temperature probe, any temperature deviation (± 2 C) of the standard solutions that is too large is signaled by the display indicator, ISE temp?. The calibration record contains the calibration data of the current calibration. You can call up the calibration record by outputting the data storage (section 11.3). Note You can automatically print a calibration record following calibration. To do so, switch on the printer before calibrating (print LED lights up green). After a valid calibration, the record is printed. Sample printout: Calibration ISE Cal Date: Cal Time: 22:46 ISE Cal Tman Std mg/l Std mg/l C mv 23 C C mv 23 C S 58.7mV Sensor +++ User: xxxxx 94 ba75446e04 06/2007

95 Ion concentration Electrode evaluation After the calibration, the measuring system evaluates the current status of the electrode. At the same time, the slope S (in mv) is evaluated. The evaluation appears on the display as the electrode evaluation. Display Slope [mv] E3 Eliminate the error according to chapter 6 WHAT TO DO IF... Preparatory activities Perform the following preparatory activities: 1 Switch on the measuring system with e. 2 Connect the electrode to the measuring module. 3 Connect a temperature probe to the measuring system so that any temperature differences that are too high will be indicated during calibration. 4 Keep the standard solutions ready. 5 Adjust the temperature of the standard solutions. 6 Switch to the Menu mode. 7 Use 46 to select the main Meas menu. 8 Confirm the ISE menu item with Confirm the ISE menu item with g. The measured variable ISE appears on the display ( ). Note For calibration, use tempered standard solutions with a temperature that differs by a max. of ± 2 C from the temperature of the test sample. ba75446e04 06/

96 Ion concentration Calibration Use two or three different standard solutions. For the three-point calibration, the standard solutions have to be selected in either increasing or decreasing order. Standard solution Values [mg/l] Std ; 0.02; 0.05; 0.1; 0.2; 0.5; 1; 2; 5; 10; 20; 50; 100; Std 2 200; 500; 1000 If Std 2 > Std 1, Std 3 must be > Std 2 Std 3 If Std 2 < Std 1, Std 3 must be < Std 2 Note The measurement precision is also dependent on the selected standard solutions. Therefore, the selected standard solutions should cover the expected value range of the subsequent concentration measurement. 96 ba75446e04 06/2007

97 Ion concentration Two-point and three-point calibration Two-point calibration 1 Perform the preparatory activities. 2 Switch to the ISE display with m and/or Press the c key. A field to select the concentration of the first standard solution is displayed. 4 Use 82 to enter the concentration of the first standard solution. 5 Immerse the electrode in standard solution 1. 6 Press the g key. The electrode voltage is displayed and the h display indicator flashes. 7 If necessary, set the temperature of the standard solution with 82 (see section 5.5.2). 8 As soon as a stable value is reached, h stops flashing and the field to input the concentration of the second standard solution appears. ba75446e04 06/

98 Ion concentration 9 Use 82 to enter the concentration of standard solution Thoroughly rinse the electrode with deionized water. 11 Immerse the electrode in standard solution Press the g key. The electrode voltage is displayed and the h display indicator flashes. 13 If necessary, set the temperature of the standard solution with 82 (see section 5.5.2). 14 As soon as a stable value is reached, h stops flashing. The slope (mv) of the electrode is displayed after the two-point calibration. The probe symbol shows the electrode evaluation after the two-point calibration. 15 Use m to finish the calibration. or Continue to the three-point calibration with g. Note The calibration curve after the two-point calibration is determined by linear regression. The values of the two-point calibration are then stored. Three-point calibration 16 Press the g key. The previously set up concentration of the third standard solution appears on the display. 98 ba75446e04 06/2007

99 Ion concentration 17 Use 82 to enter the concentration of standard solution Thoroughly rinse the electrode with deionized water. 19 Immerse the electrode in standard solution Press the g key. The electrode voltage is displayed and the h display indicator flashes. 21 If necessary, set the temperature of the standard solution with 82 (see section 5.5.2). 22 As soon as a stable value is reached, h stops flashing. The slope (mv) of the electrode is displayed. The probe symbol shows the electrode evaluation after the previous calibration. 23 Use m to finish the calibration. or In the case of the ph/ion measuring module: Continue to the four-point to six-point calibration with g (see section 7.3.2). ba75446e04 06/

100 Ion concentration Note In the ph/ion measuring module, the calibration curve is determined by spline interpolation. In all other measuring modules with the ISE function, the calibration curve is determined by linear regression Four-point to six-point calibration For the ph/ion measuring module. Beyond the three-point calibration, a four-point, five-point or six-point calibration is also possible in the ph/ion measuring module. Use different standard solutions for this. The standard solutions have to be selected in either increasing or decreasing order. Standard solution Values [mg/l] Std ; 0.02; 0.05; 0.1; 0.2; 0.5; 1; 2; 5; 10; 20; 50; 100; 200; 500; 1000 If Std 2 > Std 1, Std 3-6 must be > Std 2 If Std 2 < Std 1, Std 3-6 must be < Std 2 Note The measurement precision is also dependent on the selected standard solutions. Therefore, the selected standard solutions should cover the expected value range of the subsequent concentration measurement. 1 Perform a three-point calibration (see section 7.3). 2 Continue to the four-point to six-point calibration with g. The previously set up concentration of the next standard solution appears on the display. 3 Use 82 to enter the concentration of the fourth standard solution. 100 ba75446e04 06/2007

101 Ion concentration 4 Thoroughly rinse the electrode with deionized water. 5 Immerse the electrode in the next standard solution. 6 Press the g key. The electrode voltage is displayed and the h display indicator flashes. 7 If necessary, set the temperature of the standard solution with 82 (see section 5.5.2). 8 As soon as a stable value is reached, h stops flashing. The slope (mv) of the electrode is displayed. The probe symbol shows the electrode evaluation after the previous calibration. 9 For carrying out a multipoint calibration: Repeat steps To return to the measuring mode: Press the m key. Note You can also terminate the calibration prematurely with m. The values of the previous calibration the remain stored. The calibration curve is determined by spline interpolation. ba75446e04 06/

102 Ion concentration Preparatory activities 7.4 Measuring the ion concentration Perform the following preparatory activities when you want to measure the concentration using ion-sensitive electrodes: 1 Connect the electrode to the measuring module. 2 Adjust the temperature of the solutions, or measure the temperature if the measurement is made without a temperature probe. 3 Select the ISE measuring mode. 4 Calibrate or check the measuring system using the ionsensitive electrode. Note Incorrect calibration of ion-sensitive electrodes will result in incorrect measured values. Calibrate regularly before measuring. Temperature probe The temperature measurement is absolutely essential for a reproducible measurement. You can perform concentration measurements using an NTC30 or Pt1000 external temperature probe using the integrated temperature probe of another probe, or without a temperature probe. The temperature probe that is used is indicated on the display by v, y, or z. Note The measuring system automatically recognizes the type of the temperature probe used. If the measurement is made without a temperature probe, proceed as follows: 1 Measure the current temperature of the test sample. 2 Adjust the temperature of the test sample and the calibration standards to the same temperature (maximum deviation: ±2 C). Measuring the concentration Measure the concentration as follows: 1 Perform the preparatory activities according to section Immerse the electrode in the test sample. 3 Press the m key until ISE appears. The concentration value appears on the display. 102 ba75446e04 06/2007

103 Ion concentration AutoRead (drift control) The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable effect on the reproducibility of the measured value. The ph/ion measuring module allows a setting of the AutoRead criterion (see section 7.2.4). 1 Call up the ISE measuring mode with m. 2 Immerse the electrode in the test sample. 3 Activate the AutoRead function with a. The current measured value is frozen. 4 Start AutoRead with g. h flashes until a stable measured value is reached. The stable measured value is transmitted to the printer or interface. 5 If necessary, start the next AutoRead measurement with g. 6 To terminate the AutoRead function: Press the a key. Note Before accepting a measured value, make sure that it is stable for a longer period of time. In order to accept the current measured value without waiting for the end of the AutoRead function, press g Select the measuring method For the ph/ion measuring module. The following methods are supported:! Standard Addition (Std Add)! Double Standard Addition (Std Add ++)! Standard Subtraction (Std Sub)! Sample Addition (Smp Add)! Sample Subtraction (Smp Sub)! Blank value Addition (Bw Add) ba75446e04 06/

104 Ion concentration 1 Switch on the measuring system with e. 2 Connect the electrode to the measuring module. 3 Connect a temperature probe to the measuring system so that any temperature differences that are too high will be indicated during calibration. 4 Keep the standard solutions ready. 5 Adjust the temperature of the standard solutions. 6 Switch to the Menu mode. 7 Use 46 to select the main Meas menu. 8 Select the ISE menu item with Confirm the ISE menu item with g. The ISE measured variable appears on the display ( ). 10 Select the ISE Adv. menu item with Confirm the ISE Adv. menu item with g. The menu with the measuring methods opens. 12 Select a method with Confirm the method with g. Measurement with the selected method begins. 104 ba75446e04 06/2007

105 Ion concentration Standard Addition (Std Add) In the "Standard addition" procedure, a known amount of standard solution is added to the sample. The ion concentration in the sample is calculated from the change in potential. 1 Select the measuring method (see section 7.4.1). 2 Prepare two standard calibration solutions. 3 Perform a two-point calibration according to the user guidance. 4 As soon as a stable value for the second standard calibration solution is reached, the display indicator h stops flashing. The slope (mv) of the electrode is displayed after the two-point calibration. The probe symbol shows the electrode evaluation after the two-point calibration. Measuring 5 Start the measurement with [Start]. A window for the entry of data opens. 6 Enter Sample volume and ISA/TISAB volume with 82 and [Next]. 7 Thoroughly rinse the electrode with deionized water. 8 Immerse the electrode in the sample. 9 Start the measurement with [Start]. ba75446e04 06/

106 Ion concentration 10 Add the standard solution to the sample. 11 Start the measurement with [Start]. A window for the entry of data opens. 12 Enter Standard volume, Standard concentration and Ion type with 82 and [Next]. 13 Terminate the measurement with [Start]. 14 Start a new measurement with [Next]. 15 Repeat steps 7-13 for all samples. 16 Terminate the measurement with [ESC]. A security prompt appears. 17 Select Yes with [Next]. 18 Confirm Yes with g. Terminate the measurement. 106 ba75446e04 06/2007

107 Ion concentration Double Standard Addition (Std Add ++) In the "Double Standard Addition" procedure, a known amount of standard solution is added to the sample in two steps. The ion concentration in the sample is calculated from the change in potential between the first and second addition of standard solution. To ensure reproducibility, the second addition of standard solution must use a volume that is twice as big as the volume used in the first addition. Measuring 1 Start the measurement with [Start]. A window for the entry of data opens. 2 Enter Sample volume and ISA/TISAB volume with 82 and [Next]. 3 Thoroughly rinse the electrode with deionized water. 4 Immerse the electrode in the sample. 5 Start the measurement with [Start]. 6 Add standard solution (1 Vol.% of the sample solution). 7 Start the measurement with [Start]. A window for the entry of data opens. ba75446e04 06/

108 Ion concentration 8 Enter Standard volume, Standard concentration and Ion type with 82 and [Next]. 9 Continue the measurement with [Start]. 10 Add the standard solution (2 Vol% of the sample solution). 11 Continue the measurement with [Start]. 12 Start a new measurement with [Next]. 13 Repeat steps 1-12 for all samples. 14 Terminate the measurement with [ESC]. A security prompt appears 15 Select Yes with [Next]. 16 Confirm Yes with g. The measurement is terminated. 108 ba75446e04 06/2007

109 Ion concentration Standard Subtraction (Std Sub) In the "Standard Subtraction" procedure, a known amount of standard solution is added to the sample (as complexing agent or precipitating agent) and, thus, the ion concentration lowered. The ion concentration in the sample is calculated from the change in potential. 1 Select the measuring method (see section 7.4.1). 2 Prepare two standard calibration solutions. 3 Perform a two-point calibration according to the user guidance. 4 As soon as a stable value for the second standard calibration solution is reached, the display indicator h stops flashing. The slope (mv) of the electrode is displayed after the two-point calibration. The probe symbol shows the electrode evaluation after the two-point calibration. Measuring 5 Start the measurement with [Start]. A window for the entry of data opens. 6 Enter Sample volume and ISA/TISAB volume with 82 and [Next]. 7 Thoroughly rinse the electrode with deionized water. 8 Immerse the electrode in the sample. ba75446e04 06/

110 Ion concentration 9 Start the measurement with [Start]. 10 Add the standard solution to the sample. 11 Start the measurement with [Start]. A window for the entry of data opens. 12 Enter Standard volume, Standard concentration and Ion type for the sample (#1) and standard solution (#2) with 82 and [Next]. 13 For the entry of a self-defining type of ion (??):! Select the?? entry for the ion in the sample (#1) with 82.! Set the valency and molecular weight for the ion in the sample with [Next] and 82.! Select the?? entry for the ion in the standard solution (#2) with [Next] and 82.! Set the valency and molecular weight for the ion in the standard solution with [Next] and Terminate the measurement with [Start]. 110 ba75446e04 06/2007

111 Ion concentration 15 Start a new measurement with [Next]. 16 Repeat steps for all samples. 17 Terminate the measurement with [ESC]. A security prompt appears 18 Select Yes with [Next]. 19 Confirm Yes with g. The measurement is terminated Sample Addition (Smp Add) In the "Sample addition" procedure, a known amount of sample is added to the standard solution. The ion concentration in the sample is calculated from the change in potential. 1 Select the measuring method (see section 7.4.1). 2 Prepare two standard calibration solutions. 3 Perform a two-point calibration according to the user guidance. 4 As soon as a stable value for the second standard calibration solution is reached, the display indicator h stops flashing. The slope (mv) of the electrode is displayed after the two-point calibration. The probe symbol shows the electrode evaluation after the two-point calibration. ba75446e04 06/

112 Ion concentration Measuring 5 Start the measurement with [Start]. The entry window for Standard volume, Standard concentration and ISA volume opens. 6 Enter Standard volume, Standard concentration and ISA volume with 82 and [Next]. 7 Thoroughly rinse the electrode with deionized water. 8 Immerse the electrode in the standard. 9 Start the measurement with [Start]. 10 Add the sample to the standard solution. 11 Start the measurement with [Start]. 112 ba75446e04 06/2007

113 Ion concentration 12 Enter Standard volume, Standard concentration and ISA volume with 82 and [Next]. 13 Terminate the measurement with [Start]. 14 Start a new measurement with [Next]. 15 Repeat steps 5-14 for all samples. 16 Terminate the measurement with [ESC]. A security prompt appears 17 Select Yes with [Next]. 18 Confirm Yes with g. The measurement is terminated Sample Subtraction (Smp Sub) In the "Sample Subtraction" procedure, a known amount of sample is added to the standard solution. The ion concentration in the sample is calculated from the change in potential. The sample subtraction is one method for the indirect determination of ions. It is used for the determination of ions for which no direct determination is possible. A sample addition of 1% of the volume of the standard solution prevents the sample matrix having an interfering influence on the ba75446e04 06/

114 Ion concentration measurement. 1 Select the measuring method (see section 7.4.1). 2 Prepare two standard calibration solutions. 3 Perform a two-point calibration according to user guidance. 4 As soon as a stable value for the second standard calibration solution is reached, the display indicator h stops flashing. The slope (mv) of the electrode is displayed after the two-point calibration. The probe symbol shows the electrode evaluation after the two-point calibration. Measuring 5 Start the measurement with [Start]. The entry for Standard volume, Standard concentration and ISA volume opens. 6 Enter Standard volume, Standard concentration and ISA volume with 82 and [Next]. 7 Thoroughly rinse the electrode with deionized water. 8 Immerse the electrode in the standard solution. 9 Start the measurement with [Start]. 114 ba75446e04 06/2007

115 Ion concentration 10 Add the standard solution to the sample. 11 Start the measurement with [Start]. 12 Enter the Standard volume, and the Ion type for the sample (#1) and standard solution (#2) with 82 and [Next]. 13 For the entry of a self-defining type of ion (??):! Select the?? entry for the ion in the sample (#1) with 82.! Set the valency and molecular weight for the ion in the sample with [Next] and 82.! Select the?? entry for the ion in the standard solution (#2) with [Next] and 82.! Set the valency and molecular weight for the ion in the standard solution with [Next] and Terminate the measurement with [Start]. 15 Start a new measurement with [Next]. ba75446e04 06/

116 Ion concentration 16 Repeat steps 5-15 for all samples. 17 Terminate the measurement with [ESC]. A security prompt appears 18 Select Yes with [Next]. 19 Confirm Yes with g. The measurement is terminated. 116 ba75446e04 06/2007

117 Ion concentration Standard addition with blank value correction (Bw Add) In the "Standard addition with blank value correction" procedure, a known amount of standard solution is added to the sample in two steps. The ion concentration in the linear range of the electrode characteristic curve is increased with the first addition. The second addition is equivalent to the standard addition. The ion concentration in the sample is calculated from the change in potential. 1 Select the measuring method (see section 7.4.1). 2 Prepare two standard calibration solutions. 3 Perform a two-point calibration according to the user guidance. 4 As soon as a stable value for the second standard calibration solution is reached, the display indicator h stops flashing. The slope (mv) of the electrode is displayed after the two-point calibration. The probe symbol shows the electrode evaluation after the two-point calibration. Measuring 5 Start the measurement with [Start]. A window for the entry of data opens. ba75446e04 06/

118 Ion concentration 6 Enter the volume of the sample (Smp Vol), volume of the ISA solution (ISA Vol), volume of the blank value solution (Bw Vol) and concentration of the blank value solution (Bw Conc) with 82 and [Next]. 7 Thoroughly rinse the electrode with deionized water. 8 Immerse the electrode in the sample increased with the blank value. 9 Start the measurement with [Start]. 10 Add the standard solution to the sample. 11 Start the measurement with [Start]. 12 Enter the volume of the standard solution (Std volume), concentration of the standard solution (Std conc.) and Ion typewith 82 and [Next]. 13 Terminate the measurement with [Start]. 118 ba75446e04 06/2007

119 Ion concentration 14 Start a new measurement with [Next]. 15 Repeat steps 5-14 for all samples. 16 Terminate the measurement with [ESC]. A security prompt appears 17 Select Yes with [Next]. 18 Confirm Yes with g. The measurement is terminated. ba75446e04 06/

120 Ion concentration 120 ba75446e04 06/2007

121 Dissolved oxygen (D. O.) 8 Dissolved oxygen (D. O.) Measuring modules for the : Oxi, BSB/BOD and Multi. 8.1 Settings for D. O. measurements In order to achieve comparable and reproducible measuring results, we recommend checking the current settings before measuring Determining the measuring range For D. O. measurements, two measuring ranges with different resolutions are available.! Range from 0 to mg/l dissolved oxygen. Standard range for all aqueous test samples.! Range from 0 to 90.0 mg/l dissolved oxygen. This range may be necessary for non-aqueous test samples (measuring ranges: see chapter 15 TECHNICAL DATA). Note When connecting a recorder, deactivate the AutoRange function if measured values are also expected outside the range of mg/ l. Otherwise, the recorder scaling at the range limits will change. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the Oxi setup menu item with Confirm the Oxi setup menu item with g. 5 Select the AutoRng menu item with Confirm the AutoRng menu item with g. The i display indicator appears on the display. 7 Terminate the Menu mode with m. ba75446e04 06/

122 Dissolved oxygen (D. O.) Displaying the air pressure You can display the current air pressure in mbar. Note The value always shows the absolute air pressure. It does not refer to altitude above sea level. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the Oxi setup menu item with Confirm the Oxi setup menu item with g. 5 Using 82 select the menu item Atm. press. 6 Using g confirm the menu item Atm. press. The atmospheric pressure is displayed. 7 Press [ESC] to close the air pressure display and terminate the Menu mode Salinity correction When measuring the concentration of test samples with a salt content of more than 1 g/l, a salinity correction is required. To do this, you have to enter the salinity equivalent of the test sample (range ) and to switch on the salinity correction. Entering the salinity 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Set Sal... menu item with Confirm the selected menu item with g. The input field for the salinity appears on the display. 122 ba75446e04 06/2007

123 Dissolved oxygen (D. O.) 5 Option: Select a digit with Increase or reduce the salinity value with Use [ESC] to terminate the input. Switching the salinity correction on/ off You can switch the salinity correction on/off. The k display indicator appears on the display when the salinity correction is switched on. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the Include sal menu item with Confirm the Include sal menu item with g. The salinity correction is active ( ). k appears on the display. 5 Terminate the Menu mode with m. ba75446e04 06/

124 Dissolved oxygen (D. O.) Resetting to default settings You can reset (initialize) the settings for the D. O. measurement to the default settings. The following functions are reset: Measuring mode D. O. concentration Relative slope (S Rel ) 1.00 Salinity (value) 0.0 Salinity (function) off Reset O2 With the O2 reset, all the settings for D. O. measurements are reset to the default values. 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Reset O2 menu item with Confirm the selected menu item with g. The default settings for D. O. measurements are restored. The Menu mode is terminated. 124 ba75446e04 06/2007

125 Dissolved oxygen (D. O.) Why calibrate? When to calibrate? Calibration procedures AutoRead Calibration record 8.2 Calibrating for D. O. measurements D. O. probes age. This changes the slope of the D. O. probe. As a result, an inexact measured value is displayed. Calibration determines the current slope of the probe and stores this value in the instrument. After calibrating the D. O. probe in the air calibration vessel, the measuring system displays a value of approx. 102% oxygen saturation. If the value of the oxygen saturation obtained by checking the probe in the air calibration vessel is different from this, it is necessary to calibrate or clean the probe. If possible, check the probe signal in the air calibration vessel before each series of measurements.! At regular intervals (14 days)! After connecting another D. O. probe The following calibration procedures are provided:! Calibration in water vapor-saturated air. To calibrate the CellOx 325, use the OxiCal -SL air calibration vessel (accessory), to calibrate the DurOx 325, use the OxiCal -D air calibration vessel (contained in the scope of delivery of the sensor).! Calibration via a comparison measurement* (e. g. Winkler titration according to DIN EN or ISO 5813). At the same time, the relative slope is adapted to the comparison measurement by a correction factor. The calibration procedure automatically activates the AutoRead function. The h display indicator flashes. The calibration process is finished when h stops flashing. The calibration record contains the calibration data of the current calibration. You can call up the calibration record by outputting the data storage (section 11.3). Note You can automatically print a calibration record after the calibration. To do so, switch on the printer before calibrating (print LED lights up green). After a valid calibration, the record is printed. Sample printout: Calibration O2 Cal Date: Cal Time: 22:46 Cal Interval: 14 days OxiCal Rel. slope 0.73 Sensor +++ User: xxxxx * for the inolab Oxi 740 and BSB/BOD 740 measuring modules ba75446e04 06/

126 Dissolved oxygen (D. O.) Probe evaluation After the calibration, the measuring module evaluates the current status, i. e. the relative slope, of the probe. The evaluation appears on the display. Low values indicate that the electrolytic solution will soon be depleted and the probe will have to be regenerated. Display Relative slope S = S = S = E3 Eliminate the error according to chapter 14 WHAT TO DO IF... S < 0.6 or S > ba75446e04 06/2007

127 Dissolved oxygen (D. O.) Settings Calibration interval The calibration interval is used to determine after how many days you want to be reminded that a D. O. calibration is due. 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Cal Int.... menu item with Confirm the Cal Int.... menu item with g. The input field for the calibration interval appears. Select calibration procedure * * 5 Option: Select a digit with Set the required interval (days) with Confirm the calibration interval entered with g. 8 Use [ESC] to leave the input field. 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Use 82 to select the Oxi Caltype. 4 Confirm the OxiCaltype menu item with g. 5 Use 82 to select the menu item OxiCal or OxiTitr. * for the inolab Oxi 740 and BSB/BOD 740 measuring modules ba75446e04 06/

128 Dissolved oxygen (D. O.) Calibrating with the air calibration vessel Proceed as follows to calibrate the measuring system: Preparatory activities 1 Connect the D. O. probe to the measuring module. 2 Keep the OxiCal -SL air calibration vessel ready. Note The sponge in the air calibration vessel must be moist (not wet). Follow the instructions in the OxiCal -SL operating manual. 3 Put the D. O. probe into the air calibration vessel. 4 Press the c key. 5 Press the g key. h flashes until a stable value is reached. The probe symbol shows the relative slope that has been determined and the probe evaluation (see page 126). 6 Use g to finish the calibration. Note In the measuring mode, the system should display an oxygen saturation of approx. 102% in the air calibration vessel. 128 ba75446e04 06/2007

129 Dissolved oxygen (D. O.) Calibrating via a comparison measurement * 1 Connect the D. O. probe to the measuring instrument. 2 Press the c key. 3 Immerse the D. O. probe in the calibrating solution. 4 Press the g key. The AutoRead measurement begins. When the measured value is stable, the input field for the Fac. correction factor opens. 5 Perform a comparison measurement, e. g. Winkler titration, with the calibrating solution (determine the nominal value). Leave the measuring instrument switched on until the nominal value is determined. 6 Increase/reduce the correction factor with 82 (and 46), until the displayed measured value corresponds to the nominal value. 7 Use m or [ESC] to leave the input field and finish the calibration. 8 Remove the D. O. probe from the calibrating solution. * for the inolab Oxi 740 and BSB/BOD 740 measuring modules ba75446e04 06/

130 Dissolved oxygen (D. O.) 8.3 Measuring the D. O. content You can display the following measured parameters:! D. O. concentration! Oxygen saturation! Oxygen partial pressure Preparatory activities Preparatory activities before the measurement: 1 Connect the D. O. probe to the measuring module. The measuring system identifies the probe and displays a measured value for oxygen. If the oxygen probe is already plugged in, press m several times until a measured value for oxygen appears on the display. 2 Calibrate or check the measuring system with the probe (see section 8.2). Note An incorrect calibration of the measuring system with D. O. probes will cause incorrect measured values. Calibrate at regular intervals. Temperature probe Probe with stirrer Salinity correction The D. O. probe has an integrated temperature probe that always measures the current temperature of the test sample. The StirrOx G D. O. probe has a temperature probe and stirrer integrated in it. Using the key on the probe, switch the stirrer on and off. When the stirrer is switched on, 3 appears on the display. When measuring the concentration in test samples with a salt content of more than 1 g/l, a salinity correction is required. Displaying the D. O. content 1 Perform the preparatory activities according to section Immerse the D. O. probe in the test sample. The measured variable last selected appears on the display. 130 ba75446e04 06/2007

131 Dissolved oxygen (D. O.) Selecting the measured value display D. O. concentration 1 Press the 46 key repeatedly until the oxygen concentration appears on the display in mg/l. D. O. saturation 2 Press the 46 key repeatedly until the saturation in % appears on the display. D. O. partial pressure 3 Press the 46 key repeatedly until the D. O. partial pressure in mbar appears on the display. ba75446e04 06/

132 Dissolved oxygen (D. O.) Drift control (AutoRead) The AutoRead function checks the stability of the measurement signal. The stability has a considerable impact on the reproducibility of the measured values. When using a probe with integrated stirrer (StirrOx G), the measurement with AutoRead can be started using the key on the probe. As soon as a stable measured value is reached, the stirrer switches itself off. 1 Use m to call up the Display mode. 2 Call up the oxygen measured variable with m. 3 Immerse the D. O. probe in the test sample. 4 Activate the AutoRead function with a. The h display indicator appears on the display. The measured value is frozen (hold function). 5 Start the measurement with AutoRead by pressing g or the key on the StirrOx G probe. The h display indicator flashes. If the StirrOx G probe is used: 3 flashes. When a stable signal is reached, an acoustic signal is heard and h stops flashing. If the StirrOx G probe is used: The 3 display indicator disappears. 6 If necessary, start the next measurement with AutoRead by pressing g or the key on the StirrOx G probe. 7 To terminate the AutoRead function: Press the a key. Note In order to accept the current measured value without waiting for the end of the AutoRead function, simply press g on the terminal or measuring module or the key on the StirrOx G probe. 132 ba75446e04 06/2007

133 Dissolved oxygen (D. O.) Reproducibility criteria With identical measurement conditions, the following applies: Measured parameter Reproducibility Response time D. O. concentration better than 0.05 mg/l > 10 seconds Oxygen saturation index Oxygen partial pressure better than 0.6 % better than 0.6 mbar > 10 seconds > 10 seconds ba75446e04 06/

134 BOD 9 BOD For the BSB/BOD measuring module. 9.1 General information For BOD measurements, the inolab BSB/BOD enables:! The administration of a maximum of 30 samples.! The use of a maximum of 18 sample dilutions per sample.! The use of a maximum of 5 blank value solutions (for determination of the blank value).! The setting of the incubation time (5 to 30 days).! The assignment of names to the blank value solutions, samples, sample dilutions and routines (max. 12 characters for each name and max. 7 routines).! The simplification of entries by the use of an external IBM-PC keyboard (see section 4.2.3).! Automation by the use of BOD routines (see section 9.4); This enables BOD measurements to be automated by pressing a key for each measurement.! Automation by using the StirrOx G oxygen sensor with integrated stirrer; This enables measurement routines to be carried out simply with the key on the sensor.! Automation through the use of a barcode reader (see section 9.1.2); This makes the entry of the names of samples, sample dilutions and blank value solutions unnecessary.! The editing and printout of the measurement results (see section 9.3.1). Preparatory activities Preparatory activities before the measurement: 1 Prepare blank value solutions and sample dilutions. 2 Calibrate or check the measuring system with the probe (see section 8.2). Note An incorrect calibration of the measuring system with D. O. probes will cause incorrect measured values. Perform a calibration at regular time intervals (see section 8.2). Note The drift control (AutoRead) function corresponds to the AutoRead function in section BOD measurements are automatic AutoRead measurements. 134 ba75446e04 06/2007

135 BOD Operation with the StirrOx G oxygen sensor Use the key on the StirrOx G to switch on the stirrer and start a measurement with AutoRead at the same time. This enables the automation of the BOD measurements. When the stirrer is switched on, 3 appears on the display Operation with a barcode reader Using a barcode reader makes it possible to fill out name fields on the display automatically using the barcode reader. In addition, it is possible to start a measurement automatically after reading in a name field with the barcode by activating Scanner Automatic. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the BOD setup menu item with Confirm the BOD setup menu item with g. 7 Select the Scanner menu item with Confirm the Scanner menu item with g. The selection field for the scanner setting appears. 9 Select the required use of the barcode reader (automatic or manual) with Confirm the settings with [ESC]. Note If the scanner is set to automatic, always check all the data shown on the display during a measurement first, and then terminate the entries by reading in the name in the name field. After reading in the barcode, the BOD measurement starts automatically. ba75446e04 06/

136 BOD 9.2 BOD measurement Procedure BOD measurements run according to the following sequence:! Start measurement at the beginning of the incubation period Measurement of the blank value solutions Measurement of the sample dilutions! End measurement after expiry of the incubation period Measurement of the blank value solutions Measurement of the sample dilutions! Editing and output of the measurement results Names for samples, sample dilutions and blank value solutions are entered via the keys on the terminal, an external keyboard or via a barcode reader (see section 9.1.2) Start measurement Have the following data ready before the measurement:! Number of blank value solutions (max. 5)! Number of sample dilutions (max. 18)! Amount of sample (in ml) and total volume (in ml) of each sample dilution! Incubation period (5 to 30 days)! Names for blank value solutions, samples, sample dilutions and routines (each with a max. of 12 characters) Note The expiry of a start measurement with routine corresponds to the start measurement without routine. Entry fields are filled out with the default values of the routine. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the Start Meas menu item with Confirm the Start Meas menu item with g. The Start measurement window appears.! To start a measurement without routine, continue at step 7.! To start a measurement with routine, continue at step ba75446e04 06/2007

137 BOD Start measurement without routine 7 Select No in the With routine field using 82. The entry field New dilution water appears. 8 Swap between the entry fields with [Next]. 9 Select Yes or No in the New dilution water field with 82.! If New dilution water No was selected: The Number entry field disappears. The measurement of the blank value solutions is skipped. The blank value solutions last measured are used for the BOD determination.! If New dilution water Yes was selected: The Number entry field appears. A new blank value solution is measured to determine the BOD value. 10 Swap between the entry fields with [Next]. 11 Only for New dilution water Yes: Enter the number of the blank value solutions to be measured in the Number field with Only for New dilution water Yes: Swap between the entry fields with [Next]. 13 Select the incubation period (in days) in the BOD field with Confirm the settings with [Start].! If New dilution water No was selected: The Start measurement Sample window opens. Continue with step 28.! For New dilution water Yes: The Start measurement Dilution water window opens. Continue with step 22. ba75446e04 06/

138 BOD Start measurement with routine 15 Check the data on the display.! If the data is correct: Continue with step 17.! To change the data: Continue with step Select Yes in the With routine field with 82. The New dilution water entry field disappears. 17 Start the measurement with [Start]. The Samples window opens. 18 Select a routine name with Swap between the entry fields with [Next]. 20 Select Yes or No in the Dilution water field with 82.! If New dilution water No was selected: The Number entry field disappears. The measurement of the blank value solutions is skipped. The blank value solutions last measured are used for the BOD determination.! If New dilution water Yes was selected: The Number entry field appears. 21 Confirm the settings with [Start].! If New dilution water No was selected: The Start measurement Sample window opens. Continue with step 28.! For New dilution water Yes: The Start measurement Dilution water window opens. Continue with step ba75446e04 06/2007

139 BOD Measurement of blank value solutions 22 Check the data on the display.! If the data is correct: Continue with step 24.! To change the data: Continue with step Enter a name with 82, external keyboard or barcode reader. 24 Immerse the sensor in the blank value solution. 25 Start the measurement with [Start]. 26 Wait for the end of the measurement. 27 Repeat from step 22 to step 26 until all blank value solutions are measured. Subsequently, the Start measurement Sample window opens. Measurement of sample dilutions 28 Check the data on the display.! If the data is correct: Continue with step 32.! To change the data: Continue with step Enter a name for the sample dilution with 82, an external keyboard or via the barcode reader. 30 Swap between the entry fields with [Next]. 31 Enter the number of the sample dilutions in the Number field with 82 or an external keyboard. 32 Confirm the settings with [Start]. The Start measurement Dilution 1 window appears. ba75446e04 06/

140 BOD 33 Check the data on the display.! If the data is correct: Continue with step 40.! To change the data: Continue with step Enter a name with 82, an external keyboard or via the barcode reader. 35 Swap between the entry fields with [Next]. 36 Enter the volume of the sample in the Vol. sample field with 82 or an external keyboard. 37 Swap between the entry fields with [Next]. 38 Enter the total volume of the sample dilution in the Vol.Total field with 82 or an external keyboard. 39 Immerse the sensor in the sample dilution. 40 Start the measurement with [Start]. The sample dilution is measured. 41 Wait for the end of the measurement. 140 ba75446e04 06/2007

141 BOD 42 Repeat from step 33 to step 42 for all sample dilutions. Subsequently, the Routine STORE window opens. 43 Select Save Routine YES or No in the field with 82. If Save Routine YES was selected, the routine is saved under a routine name. 44 Confirm the settings with [Ok].! If Save Routine NO was selected, the start measurement is ended.! If Save Routine YES was selected, an entry field for the routine name appears. Saving the routine 45 Swap between the entry fields with [Next]. 46 Enter a name for the routine with 82 or an external keyboard. 47 Confirm the entry with [Ok]. The start measurement is completed and the data are stored as a routine using the name entered. ba75446e04 06/

142 BOD Stopping the BOD measurement You can stop the measurement process at any time during a start measurement or end measurement. 1 Initiate the stopping of the measurement with [ESC] or with m. A security prompt appears 2 Select Yes for the security prompt with [Next]. 3 Confirm the stopping with g. The entries and measurements made up to now are deleted. Note The data of the start measurement are retained when an end measurement is stopped End measurement The end measurement is carried out after the incubation period expires. Note Normally, you can confirm all windows and settings in the end measurement by simply pressing [Start]. The settings and values offered correspond to the values that were entered in the start measurement. 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the menu item BOD end meas with Confirm the BOD end meas menu item with g. The Select sample window opens. 142 ba75446e04 06/2007

143 BOD 7 Select a sample in the name field with 82. The status field shows the status of the sample: : incubation period still running : performing end measurement : end measurement already performed. : incubation period exceeded 8 Check the data on the display.! If the data is correct: Continue with step 11.! To change the data: Continue with step 9. 9 Swap between the selection fields with [Next]. 10 Select Yes or No in the KnownDil.Water (use known dilution water) field with 82.! Skip the end measurement of the blank value solutions with Yes. The end measurements of the known blank value solutions are used for calculating the BOD.! Use No to carry out the end measurements also for the blank value solutions. 11 Begin the end measurement with [Start].! If KnownDil.Water Yes was selected, continue with step 19.! If KnownDil.Water No was selected, the End measurement window for the first blank value solution opens. Note In the case of an end measurement with barcode reader, any order of the measurement of blank value solutions and sample dilutions is acceptable. Reading in the identification automatically causes the correct assignment of the start measurement to the measured value. In an end measurement without a barcode reader, follow the prescribed order of the measurements. ba75446e04 06/

144 BOD 12 Check the data on the display.! If the data is correct: Continue with step 16.! To change the data: Continue with step Swap between the selection fields with [Next]. 14 Select Yes or No in the Remove field with 82.! If Remove No was selected, the (default) values from the start measurement are adopted.! If Remove Yes was selected, no end measurement is performed for this blank value solution. The value appears on the report marked by *. This value is not used for calculating the BOD value. 15 Immerse the sensor in the blank value solution. 16 Confirm the settings with [Start].! If Remove Yes was selected, a security prompt appears before the removal. After confirmation with Yes, the next blank value solution is offered for the end measurement (see step 12).! If Remove No was selected, the measurement of the blank value solution begins. 17 Wait for the end of the measurement. 18 Repeat from step 12 to step 18 for all blank value solutions. Subsequently, the End measurement window opens for the sample dilutions. 144 ba75446e04 06/2007

145 BOD 19 Check the data on the display.! If the data is correct: Continue with step 23.! To change the data: Continue with step Swap between the selection fields with [Next]. 21 Select Yes or No in the Remove field with 82.! If Remove No was selected, the end measurement is carried out.! If Remove Yes was selected, the end measurement is not carried out. The value appears on the report marked by *. This value is not used for calculating the BOD value. 22 Immerse the sensor in the sample dilution. 23 Confirm the data with [Start].! If Remove Yes was selected, a security prompt appears before the removal. After confirming with Yes the next sample dilution is offered (see step 19).! If Remove No was selected, the measurement of the sample dilution begins. 24 Wait for the end of the measurement. 25 Repeat from step 19 to step 24 for all sample dilutions. Subsequently, the End status BOD window opens. 26 Display and edit the measurement result with [Open] (see section 9.3.1) or Terminate the end measurement with [ESC]. ba75446e04 06/

146 BOD 9.3 BOD result Displaying, editing and printing the measurement result After the end measurement is completed, you can display, edit and print out the measurement result. The editing is restricted to the IDs of blank value solutions and sample dilutions that are not included in the calculation. Displaying the measurement result 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the BOD result menu item with Confirm the BOD result menu item with g. 7 Select a sample name with 82. The status field shows the status of the sample: : incubation period still running : performing end measurement : end measurement already performed : incubation period exceeded 8 Display the result with [Open]. 9 View the measured data with 82 (a small arrow on the left edge of the display shows the selected line). 146 ba75446e04 06/2007

147 BOD Editing the measurement result 10 Select a line containing a measured value with 82 (a small arrow on the left edge of the display shows the selected line). 11 If necessary, use g to exclude the measured value of the BOD calculation (small * on the right edge of the display). The value also appears in the report marked by *. This value is not used for calculating the BOD value. Printing the measurement result 12 Print out the result with p. ba75446e04 06/

148 BOD Sample printout: :04:53 ======================================= BOD 5 report Sample ID :1 Start measurement from :02:29 to :03:38 Final measurement from :03:35 to :04:44 Dilution water ID: 1 Start :7.87 mg/ l End :7.15 mg/ l Blank value :0.72 mg/ l ID: 2 Start :7.87 mg/ l End :7.87 mg/ l Blank value :0.00 mg/ l Measurement is removed Blank value = 0.72 mg/l Sample dilution ID: test1 Sample volume :100 ml Total volume :1000 ml Start :7.87 mg/ l End :7.87 mg/ l BOD 5 :-6.48 mg/l Measurement is removed ID: test2 Sample volume :100 ml Total volume :1000 ml Start :7.87 mg/ l End :7.87 mg/ l BOD 5 :-6.48 mg/l ID: test3 Sample volume :100 ml 148 ba75446e04 06/2007

149 BOD Deleting BOD measurement results Deleting individual BOD measurement results 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the Delete BOD menu item with Confirm the Delete BOD menu item with g. 7 Select the Sample menu item with Confirm the Sample menu item with g. The Select sample window opens. 9 Select a sample name with 82. The status field shows the status of the sample: : incubation period still running : performing end measurement : end measurement already performed : incubation period exceeded 10 Confirm the selection with [Ok]. The security prompt opens. 11 Select Yes with [Next]. 12 Confirm the deleting of the dataset with g. The display shows a confirmation of the deleted dataset. Deleting all BOD measurement results 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the Delete BOD menu item with Confirm the Delete BOD menu item with g. 7 Select the All samples menu item with 82. ba75446e04 06/

150 BOD 8 Confirm the All samples menu item with g. The security prompt opens. 9 Select Yes with [Next]. 10 Confirm the deleting of all datasets with g. The display shows a confirmation of the deleting of all datasets. 9.4 Routines Setting up routines Routines define constantly recurring measurement procedures. This includes the number and name of blank value solutions and sample dilutions as well as the dilution ratios. Routines are set up! Before the first measurement: Complete routines can be set up in the BOD menu.! At the end of a start measurement: You can save the current settings as a routine in the Save routine window. Have the following data ready before setting up a routine:! Number of blank value solutions (max. 5)! Number of sample dilutions per sample (max. 18)! Amount of sample (in ml) and total volume (in ml) of each sample dilution! Incubation period (5 to 30 days)! Names of the blank value solutions, samples, sample dilutions and routines (max. of 12 characters each) 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the BOD setup menu item with Confirm the BOD setup menu item with g. 7 Select the New routine menu item with Confirm the New routine menu item with g. The Start measurement window appears. 150 ba75446e04 06/2007

151 BOD Note When defining new routines, the same displays appear as in the start measurement. However, the measurement of samples is not shown. When defining routines, [Ok] always appears instead of the [Start] softkey. For a detailed description of the process, see section Note Also, an existing routine can be used as a template when defining new routines Starting a measurement with routine When using the routines for measurement, the fields on the display are already filled out with the data from the routine. This simplifies operation during the measurement to confirming the individual window with [Start]. With the exception of selecting a routine, the course of the measurement does not differ from the start measurement without routine Deleting routines The number of stored routines is restricted to 7. To create space for new routines, or to remove routines that are no longer required, routines can be deleted. It is possible to delete an individual routine or to delete all stored routines. Deleting an individual routine 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the Delete BOD menu item with Confirm the Delete BOD menu item with g. 7 Select the Routine menu item with 82. ba75446e04 06/

152 BOD 8 Confirm the Routine menu item with g. The Remove routine window opens. 9 Select a routine with Confirm the selection with [OK]. A security prompt opens before the selection is deleted. 11 Select Yes with [Next]. 12 Confirm the deletion of the routine with g. The display shows that the selected routine has been successfully deleted. Deleting all routines 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the BOD menu item with Confirm the BOD menu item with g. 5 Select the Delete BOD menu item with Confirm the Delete BOD menu item with g. 7 Select the All routines menu item with Confirm the All routines menu item with g. A security prompt opens before the selection is deleted. 9 Select Yes with [Next]. 10 Confirm the deleting of all routines with g. The display shows a confirmation of the deleting of all datasets. 152 ba75446e04 06/2007

153 Conductivity 10 Conductivity Measuring modules for the : Cond, ph/cond and Multi Settings for conductivity measurements In order to achieve comparable and reproducible measuring results, we recommend checking and, if necessary, correcting the current settings before measuring Determining the measuring range You can select the measuring range manually or have it selected automatically. We recommend setting the measuring range manually when the intended measurement is output to a recorder at the same time. You can determine the measuring range for measuring the conductivity as follows:! Automatic selection of the measuring range! Manual selection between the following ranges with the following resolution: µs (if you use LR001), 0.01 µs (if you use LR01), 0.1 µs/cm, 1 µs/cm, 0.01 ms/cm, 0.1 ms/cm, 1 ms/cm! Measuring the salinity (Sal) and the total dissolved solids (TDS) Note If you are using a recorder, we recommend deactivating the AutoRange function. Specify the expected range manually. Otherwise, the recorder scaling will change to a different range due to the switch-over. Manual selection of the measuring range The AutoRng function has to be switched off for the manual selection of the measuring range. 1 Switch to the Display mode. 2 Use 46 to select the required range or Sal or TDS. Automatic switch-over of the measuring range 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. ba75446e04 06/

154 Conductivity 3 Select the Cond setup menu item with Confirm the Cond setup menu item with g. 5 Select the AutoRng menu item with Confirm the AutoRng menu item with g. i appears on the display. 7 Terminate the Menu mode with m Entering the reference temperature You can select the reference temperature T Ref = 25 C (Tref25) or T Ref = 20 C (Tref20). 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the Cond setup menu item with Confirm the Cond setup menu item with g. 5 Select the TRef25 or TRef20 menu item with Confirm the TRef25 or TRef20 menu item with g. 7 Terminate the Menu mode with m. When displaying the measured variable, conductivity, ( ) 5 or 0 appears on the display. 154 ba75446e04 06/2007

155 Conductivity Displaying the conductivity or specific resistance You can select the display of the conductivity (in S/cm) or of the specific resistance (in MΩ cm). 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Select the Cond setup menu item with Confirm the Cond setup menu item with g. 5 Select the Cond MOhm menu item with Confirm the Cond MOhm menu item with g. The conductivity is displayed in the units, MΩ cm. 7 Use [ESC] to terminate the Menu mode. ba75446e04 06/

156 Conductivity Setting the temperature compensation The calculation of the temperature compensation is based on the preset reference temperature, Tref 20 or Tref 25 (see chapter 10.2 DETERMINING/SETTING UP THE CELL CONSTANT). You can select the following temperature compensations for the temperature functions:! Nonlinear temperature compensation "nlf" according to EN ! Linear temperature compensation "lin" with the adjustable coefficient of to %/K! No temperature compensation "off" Note Select the following temperature compensations from the table according to the respective test sample: Application notes Test sample Temperature compensation Display indicator Natural water (ground water, surface water, drinking water) Ultrapure water Other aqueous solutions Salinity (seawater) nlf EN nlf EN Linear temperature compensation Select %/K Automatically nlf according to IOT n n q k, n Setting the temperature compensation 1 Switch to the Menu mode. 2 Use 46 to select the main Meas menu. 3 Use 82 to select one of the menu items, TC nlf or TC lin or TC off. 156 ba75446e04 06/2007

157 Conductivity 4 Confirm the selected menu item with g. The temperature compensation is active ( ). 5 Terminate the Menu mode with m Reset (Reset) You can reset (initialize) the settings for the conductivity measurement. In a reset, the following functions for the conductivity measurement are reset to the default settings: Measuring mode Cell constant (c) Temperature compensation Reference temperature Temperature coefficient (TC) of the linear temperature compensation cm -1 (calibrated) cm -1 (set up) nlf TRef %/K TDS factor Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Reset cond menu item with 82. ba75446e04 06/

158 Conductivity 4 Use g to confirm the Reset cond menu item. The default settings for conductivity measurements are restored. The Menu mode is terminated. Note The calibration data will be lost in a reset. Recalibrate after performing a reset. Why determine/set up the cell constant? 10.2 Determining/setting up the cell constant Aging slightly changes the characteristics of the cell, e. g. by coatings. As a result, an inexact measured value is displayed. The original characteristics of the cell can often be restored by cleaning the cell. Calibration determines the current cell constant and stores it in the instrument. Thus, you should calibrate at regular intervals (we recommend: every 6 months). You can determine the actual cell constant of the conductivity measuring cell by calibrating with the control standard in the following ranges:! cm -1 (e.g. TetraCon, nominal cell constant 0.475)! cm -1 (cells with a cell constant of approx. 1) For the fixed cell constant 0.01 cm -1, calibration is not required. Cell constants outside the ranges mentioned above cannot be calibrated Determining the cell constant (calibration) Note This method of automatically determining the cell constant by calibration with the 0.01 mol/l KCL standard solution can only be used for measuring cells with cell constants in the range cm - 1 or cm -1. Note If the error message E3 appears, refer to chapter 14 WHAT TO DO IF... Calibration procedure To determine the cell constant, you need a 0.01 mol/l KCl calibration solution. 1 Start the determination of the cell constant with c. 158 ba75446e04 06/2007

159 Conductivity 2 Immerse the measuring cell in the prepared calibration solution. 3 Press the g key in order to start the measurement with AutoRead to determine the cell constant. The h display indicator flashes until a stable signal is reached. The cell constant determined is displayed. 4 Return to the measuring mode with g or m. Calibration evaluation After calibrating, the measuring module automatically evaluates the calibration. The evaluation appears on the display. Display Cell constant [cm -1 ] cm cm -1 E3 Eliminate the error according to chapter 14 WHAT TO DO IF... outside the ranges cm -1 or cm -1 Calibration record The measuring module automatically saves the cell constant in the calibration record. The last calibration protocol can be displayed at any time with the aid of the Cal Prot. function... in the Cal menu (see section 11.3). ba75446e04 06/

160 Conductivity Note You can automatically print a calibration record after the calibration. To do so, switch on the printer before calibrating (print LED lights up green). After a valid calibration, the record is printed. Sample printout: Conductivity calibration Cal date: Cal time: 22:46 Cal interval: 180 days Cal standard: 0.01 mol/l KCl Conductivity/Tref25: 1413 µs/cm 24.6 C Cell const: /cm Sensor +++ User: xxxxx Calibration interval The calibration interval is used to determine after how many days you want to be reminded that a conductivity calibration is due. 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Use 82 to select the Cal Int.... menu item. 4 Use g to confirm the Cal Int.... menu item. The input field for the calibration interval appears. 5 Option: Select a digit with Set the required interval (days) with Confirm the calibration interval entered with g. 8 Use [ESC] to leave the input field. 160 ba75446e04 06/2007

161 Conductivity Setting the cell constant Note The cell constant to be set must either be taken from the operating manual of the measuring cell or is printed on the measuring cell. The inolab 3 measuring system offers the following possibilities of setting the cell constant:! Accepting the cell constant from the last calibration record (Cal cell)! Selecting any cell constant within the range to cm -1 (Man cell)! Selecting any cell constant within the range to cm -1 (Man LR01)! Selecting the fixed cell constant 0.01 cm -1 (LR001) Note The last calibration protocol can be displayed at any time with the aid of the Cal Prot.... function in the Cal menu (see section 11.3 STORAGE OF CALIBRATION RECORDS). Accepting the cell constant of the calibration record Accept the cell constant of the last calibration record as follows: 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Cell const. menu item with 82 4 Confirm the Cell const. menu item. 5 Select the Cal cell menu item with Confirm the Cal cell menu item with g. The cell constant of the last calibration is accepted. Cal cell is active ( ). 7 Terminate the Menu mode with m. ba75446e04 06/

162 Conductivity Selecting the cell constant in the range cm -1 You can set the cell constant manually in the range cm - 1 as follows: 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Cell const. menu item with 82 4 Confirm the Cell const. menu item. 5 Select the Man cell menu item with Confirm the Man cell menu item with g. The input field for the cell constant opens. The current value is displayed. 7 Increase/reduce the value with Use [ESC] to leave the input field. 9 Confirm the selected cell constant with g. The selected cell constant is accepted. Man cell is active ( ). 10 Terminate the Menu mode with m. 162 ba75446e04 06/2007

163 Conductivity Selecting the cell constant in the range cm -1 You can set the cell constant manually in the range cm - 1 as follows: 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Cell const. menu item with 82 4 Confirm the Cell const. menu item. 5 Select the Man cell menu item with Confirm the Man cell menu item with g. The input field for the cell constant opens. The current value is displayed. 7 Increase/reduce the value with Use [ESC] to leave the input field. 9 Confirm the selected cell constant with g. The selected cell constant is accepted. Man cell is active ( ). 10 Terminate the Menu mode with m. ba75446e04 06/

164 Conductivity Selecting the cell You can set the cell constant to the fixed value of 0.01 cm -1 : constant 0.01 cm -1 1 Switch to the Menu mode. 2 Use 46 to select the main Cal menu. 3 Select the Cell const. menu item with 82 4 Confirm the Cell const. menu item. 5 Use 82 to select the required cell constant LR 001 (0.01 cm -1 ). 6 Use 82 to select the required cell constant LR 001 (0.01 cm -1 ). 7 Confirm the selected cell constant with g. The selected cell constant is active ( ). 8 Terminate the Menu mode with m. 164 ba75446e04 06/2007

165 Conductivity 10.3 Measuring the conductivity General information You can display the following measured parameters:! Conductivity/specific resistance (For details of how to switch over, see chapter 10.1 SETTINGS FOR CONDUCTIVITY MEASUREMENTS)! Salinity (Sal)! Total dissolved solids (TDS) Preparatory activities Perform the following preparatory activities when you want to measure: 1 Connect a conductivity measuring cell with temperature probe to the measuring module. The instrument recognizes the measuring cell and automatically switches to the conductivity measuring mode that was last selected. If the conductivity measuring cell is already connected, press the m repeatedly until the conductivity measuring mode appears. 2 Check the selected cell constant or calibrate the measuring module with the measuring cell. How to calibrate is described in section DETERMINING THE CELL CONSTANT (CALIBRATION) on page Displaying the conductivity, dry filtrate residue or salinity You can switch back and forth between the measured variables, conductivity, dry filtrate residue and salinity: 1 Perform the preparatory activities according to section Immerse the measuring cell in the test sample. 3 Press the 46 key until the measured variable, conductivity, ( ) appears. The measured value appears on the display. 4 Press the 46 key until the measured variable, Sal, appears. The salinity value appears on the display. ba75446e04 06/

166 Conductivity 5 Press the 46 key until the measured variable, TDS, appears. The TDS value appears on the display. Note See also Application report CONDUCTOMETRICAL DETERMINATION OF THE TOTAL DISSOLVED SOLIDS (TDS) Drift control (AutoRead) The drift control function (AutoRead) checks the stability of the measured value. The stability has a considerable effect on the reproducibility of the measured value. 1 Select the required measuring mode with Immerse the conductivity measuring cell in the test sample. 3 Activate the AutoRead function with a. The measured value is frozen (hold function). 4 Start the measurement with AutoRead by pressing g. The h AR display indicator flashes. When a stable signal is reached, an acoustic signal is heard and h stops flashing. 166 ba75446e04 06/2007

167 Conductivity 5 If necessary, start the next measurement with AutoRead by pressing g. 6 To terminate AutoRead: Press the a key. Note In order to accept the current measured value without waiting for the end of the AutoRead function, simply press g. You can only change to another measured variable after completion of AutoRead. ba75446e04 06/

168 Conductivity 168 ba75446e04 06/2007

169 Data storage 11 Data storage Data storage enables the storage and administration of measurement, configuration and calibration data. The following types of storage are available:! Storage of measurement data records: This memory contains measurement data records for subsequent processing or output (see section 11.1)! Storage for system configurations (settings): This memory enables you to save and recall individual configurations (see section 11.2)! Storage for calibration records: This memory contains all current calibration records (see section 11.3) 11.1 Storage of measurement data records Measurement data record memory enables the storage of measurement data records for subsequent processing or output. There are two methods of storing measurement data records:! Manual storage of individual measurement data records! Automatic storage of several measurement data records A measurement data record consists of:! Number of the storage location (Mem no.)! Date/time! Identification (ID)! Measured values (e.g. ph and measured temperature value) with status information To find data records easily, Mem no., ID and date/time are available as filter criteria. The identification (ID), which you allocate yourself, can be especially useful when doing this (see section ). The ID can consist of a number, or, when using an external PC keyboard, of digits and letters. ba75446e04 06/

170 Data storage Saving individual measurement data records You can store individual measurement data records and assign them an ID that makes it easier to find the data record again. 1 Switch to the Display mode. 2 Start the manual storing with s. The Store window shows the current data record. The instrument automatically allocates a storage number (Mem no.) to the 3 Use [Ident] to open the Ident input window. 4 Input the required name (ID) with With g confirm the ID. In the manual type of storage, the measurement data record is stored together with the selected ID. 6 Use [ESC] to leave the Ident input window. The Store window shows the data record with the new ID. 7 With [ESC] leave the Store window. 170 ba75446e04 06/2007

171 Data storage Automatically storing measurement data records AutoStore enables measurement data records to be stored at defined time intervals. Starting AutoStore causes you to move to the Set AutoStore input window where you define the details of the storage with AutoStore.! ID: The name (ID) identifies the measurement and makes it easier to find the data in memory. The ID can consist of figures and letters (when using an external IBM PC keyboard).! Duration: Here you set up the measuring period for which the planned AutoStore storing is to be performed.! Interval: Here you determine the intervals at which the measuring data records will be stored.! Memory requirements (datasets): Here you obtain information on how many storage locations are required with the current settings.! Available memory locations: Here you obtain information on how many storage locations are still available. Note If insufficient memory locations are available, a message appears on the display. Change the entries in the Duration and/or Interval field until an available number of memory locations is displayed. Measurement data records can only be stored in a free memory location. If necessary, the contents of the memory must be deleted (see page 178). Starting AutoStore 1 Switch to the Menu mode. 2 Use 46 to select the main Mem menu. 3 Select the AutoStore menu item with 82. ba75446e04 06/

172 Data storage 4 Confirm the AutoStore menu item with g. 5 Select the Open menu item with Confirm the Open menu item with g. The free memory locations are shown (black=free). 7 Use 82 to select a free memory location, Mem Confirm the menu item with g. The Set AutoStore input window is open. 9 Enter a name with 82, external keyboard or barcode reader. 10 Switch to the next input field with [Next]. Complete the input with Use [Open] to start the automatic storing. 9 appears on the display. Terminating AutoStore AutoStore is automatically finished when the period set for storing (Duration) has expired. You can see that an AutoStore is terminated when 9 is no longer visible on the display. If you want to quit an AutoStore storing procedure before the set period has expired, proceed as follows: 172 ba75446e04 06/2007

173 Data storage 1 Switch to the Menu mode. 2 Use 46 to select the main Mem menu. 3 Select the AutoStore menu item with Confirm the AutoStore menu item with g. 5 Select the Close menu item with Confirm the Close menu item with g. The automatic storing function is terminated. Recorded measuring data remain in the memory. The 9 display indicator is no longer displayed. ba75446e04 06/

174 Data storage Displaying stored measurement data records You can display measured values that have been stored automatically or manually. Data from the AutoStore memory can be displayed as a graph or in tabular form. Data from the manual measurement data record memory can only be displayed numerically. Displaying automatically stored measurement data records graphically 1 Switch to the Menu mode. 2 Use 46 to select the main Mem menu. 3 Select the AutStoGrph menu item with Confirm the AutStoGrph menu item with g. 5 Select the Open menu item with Confirm the Open menu item with g. 7 Select a memory location, e.g. Mem 1, with Confirm the selected storage location with g. The AutoStoGrph Mem 1 input window is open. 9 Select an available parameter ph, Oxi or Cond (here, e.g. ph) with Confirm the selected parameter with [Open]. The content of the storage location is displayed in the form of a graph. 174 ba75446e04 06/2007

175 Data storage Zooming a sector (zoom function) 1 Display the upper left-hand corner of the required sector with g. 2 Position the corner with Confirm the upper left-hand corner of the required sector and display the lower right-hand corner of the required sector with g. 4 Position the corner with Confirm the selected display sector with g. The display shows the new sector. Note You can zoom up to three times in a sequence and undo each zooming. Undoing the zoom function 6 Use g and [Tab] to undo the last zoom function. The sector before the last zooming is displayed again. Terminating the graphical display 1 Switch to the Menu mode. 2 Use 46 to select the main Mem menu. ba75446e04 06/

176 Data storage 3 Select the AutStoGrph menu item with Confirm the AutStoGrph menu item with g. 5 Select the Close menu item with Confirm the Close menu item with g. The graphical display is terminated. Displaying measurement data records numerically With the following function you can output manually stored individual data records or AutoStore data to the display. Filters help you to select individual data records according to the following criteria:! Number of the storage location (Mem No.)! Identification (ID)! Date and time of storing 1 Use r to call up the manual measurement data record memory (man mem). The first data record that meets the selected criterion is displayed. 2 Call up further measurement data record memory with r. The measurement data record memory locations are called up in the order, Mem man - Mem auto Call up the RCL menu with [RCL menu]. 4 Select the RCL filter menu item with ba75446e04 06/2007

177 Data storage 5 Confirm the RCL filter menu item with g. The RCL filter input window is open. 6 Use 82 to switch a filter, e. g. Mem No., on or off (on/off). 7 Switch to the next input field with [Next]. Complete all inputs. 8 Option: Select a digit with Increase/reduce values or switch a filter on/off with Close the input window with [ESC]. The first data record meeting the selected criterion is displayed. 11 Swap between the data records meeting the selected filter criterion with Terminate the storage display with [ESC]. Note If there are large amounts of data, you may have to wait for a few seconds until a data record is displayed. ba75446e04 06/

178 Data storage Deleting stored measurement data records Deleting automatically stored measurement data records Using the following function, you can delete the contents of the AutoStore storage locations, Mem 1 to Mem 4. 1 Switch to the Menu mode. 2 Use 46 to select the main Mem menu. 3 Select the AutoStore menu item with Confirm the AutoStore menu item with g. 5 Select the Clear menu item with Confirm the Clear menu item with g. 7 Select a memory location, e.g. Mem 1, with Confirm the selected memory with g. A security prompt appears on the display. Note You can cancel the delete process with [ESC]. 9 Select yes with [Next]. 10 Confirm the delete with g. The measurement data record memory is deleted. 178 ba75446e04 06/2007

179 Data storage Deleting the manual measurement data record memory The memory for individual, manual stored measurement data records can be deleted as a whole. 1 Switch to the Menu mode. 2 Use 46 to select the main Mem menu. 3 Select the Mem man menu item with Confirm the Mem man menu item with g. 5 Select the Clear menu item with Confirm the Clear menu item with g. A security prompt appears on the display. Note You can cancel the delete process with [ESC]. 7 Select yes with [Next]. 8 Confirm the delete with g. The manual measurement data record memory is deleted. ba75446e04 06/

180 Data storage 11.2 Storage of system configurations Up to 4 different system configurations can be managed (store, recall, delete and print) by the. This can then be helpful, e.g. if several persons are using the same measuring system, or different measurement tasks require different settings Saving the system configuration When storing the system configuration, you store all the current settings for all probes. 1 Switch to the Menu mode with [Menu]. 2 Use 46 to select the main Mem menu. 3 Use 82 to select the Settings menu item. 4 Use g to confirm the Settings menu item. 5 Select the Save menu item with Confirm the Save menu item with g. 7 Use 82 to select a free storage location, Setting Free storage locations are displayed in black, occupied storage locations are gray. 8 Confirm the storing with g. The stored data are displayed. 9 Save the data with [OK]. 10 Terminate saving with [ESC]. 180 ba75446e04 06/2007

181 Data storage Recalling a system configuration You can recall system configurations that you have stored yourself or the default setting as follows: 1 Switch to the Menu mode with [Menu]. 2 Use 46 to select the main Mem menu. 3 Use 82 to select the Settings menu item. 4 Use g to confirm the Settings menu item. 5 Select the Open menu item with Confirm the Open menu item with g. 7 Select a Current, Basic sett. or Sett memory location with 82. Occupied storage locations are displayed in black, free storage locations are gray. 8 Call up the selected storage location with g. The settings are displayed. ba75446e04 06/

182 Data storage 9 Call up the selected setting with [OK]. If Current was selected: Display the current settings If Default was selected: Use default setting If Setting 1-4 was selected: open the stored setting A security prompt appears. 10 Select yes with [Next]. 11 Confirm the selection with g. The user profile is taken as the current setting. 12 Terminate the Menu mode with m Deleting a system configuration With this function, you can delete system configurations that you have stored yourself. The default settings always remain stored. 1 Switch to the Menu mode with [Menu]. 2 Use 46 to select the main Mem menu. 3 Use 82 to select the Settings menu item. 4 Use g to confirm the Settings menu item. 5 Select the Clear menu item with Confirm the Clear menu item with g. 7 Select a Settings memory location with Delete the system configuration with g. A security prompt appears before it is deleted. 9 Select yes with [Next]. 10 Confirm the delete with g. The user profile is deleted. 182 ba75446e04 06/2007

183 Data storage 11.3 Storage of calibration records The following calibration results are automatically stored in a record during each calibration:! Calibrating for ph/ise and D. O. measurements! Determination of the cell constant of conductivity measuring cells. The text displayed on the calibration protocol shows the calibration data for all measured variables as continuous text. You can recall the data of the last calibration/determination at any time: 1 Switch to the Menu mode with [Menu]. 2 Use 46 to select the main Cal menu. 3 Using 82 select the Cal. Prot... menu item. 4 Use g to confirm the Cal. Prot... menu item. The Cal. records window opens. The first page of the calibration records is displayed. 5 Scroll through the display text with 2. 6 Scroll through the display text with Terminate the Menu mode with [ESC]. ba75446e04 06/

184 Data storage 184 ba75446e04 06/2007

185 Data output 12 Data output The terminal provides several options for ouputting data.! Output to the display (Displaying measured values) numerical display of measured values (standard) graphical display of measured values (digital recorder)! Output to the integrated printer (on terminals with integrated printer only) printing graphical and numerical data printing on the digital recorder! Output to the RS 232/REC interface printing numerical data on an external printer transmitting data to a PC, e.g. to be saved in a database recording the data via an external analog recorder You can output the following data:! Graphical displays! Alphanumerical displays Calibration records Stored measured values Stored system configurations Alphanumerical data can be output as a legible text or databaseconform (data list separated by semicolons). You can start the data output to the integrated printer or the RS232 interface as follows:! Manually by pressing the p softkey: prints, e.g. the current measured value or the current calibration protocol by pressing the g key on the measuring module: prints the current measured value (precondition: the AutoRead function is not active) by selecting Print in the menu: prints, e.g. the system configuration or selected elements of a data memory! Automatically by selecting Print in the menu: prints, e.g. the recording on the digital recorder after each AutoRead measurement with a stable measured value ba75446e04 06/

186 Data output each time a measured value is stored if AutoStore is active (9 flashes) after each calibration when the calibration record is output 12.1 Data output to the display The current measured value can be displayed numerically or graphically. The numerical display of measured values is the default setting. The graphical representation of a selected measured variable is activated via the digital recorder Numerical display The numerical display of measured values is the default display. The current measured value is displayed continuously. The numerical display looks as follows (example): 186 ba75446e04 06/2007

187 Data output Graphical display The digital recorder continuously records measured values and depicts them graphically with respect to time (vertical axis) on the display. In the graphical display the cursor (+) moves from the top to the bottom. The measured value is also displayed numerically (here, e.g ph) at the same time. If the digital recorder is started, you are moved first to the Recorder input window to define the details of the graphical display. Input window Graphical display ! Center (1) determines the center of the measured value range (here 7.000).! Delta (2) determines the extension of the measured value range starting from the center (here Center ± Delta gives a range of ph to ).! Timebase (3) defines the length of the time intervals (5, 6) shown on the display; the duration is also displayed on the recorder strip (8)! Digits (4) determines the number of the digits after the decimal point When the first period has expired, the recording of the current period is displayed in the lower half (6) and the previous period is displayed in the upper half (5). Note The current measured values are not stored. ba75446e04 06/

188 Data output Starting the digital recorder When starting the digital recorder, you can make settings that define the graphical display and the recording of the measured values. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Using 82, select the Dig. Rec menu item. 4 Using g, confirm the Dig. Rec menu item. 5 Select the Open menu item with Confirm the Open menu item with g. 7 Use 82 to select one of the menu items, ph, Oxi, or Cond. 8 Confirm the selected menu item with g. The Recorder input field appears on the display. 9 Option: Move between the individual digits with Increase or decrease the value with Move to the next input field with [Next]. 12 Complete all inputs. 13 Confirm the input and start the digital recorder with [Open] or quit without starting the recorder with [ESC]. 14 Option: Switch to the numerical display with [Tab]. 188 ba75446e04 06/2007

189 Data output Reducing the measuring range limits (zoom function) 15 Display the left-hand measuring range limit with g. 16 Change the left-hand measuring range limit with Determine the left-hand measuring range limit and display the right-hand measuring range limit with g. 18 Change the right-hand measuring range limit with Determine the right-hand measuring range limit with g. The measuring range limits show the new values. Undoing the zoom function 20 Undo the zoom function with g and [Tab]. The sector determined in the Recorder input window appears on the display again. ba75446e04 06/

190 Data output Terminating the digital recorder 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Using 82, select the Dig. Rec menu item. 4 Using g, confirm the Dig. Rec menu item. 5 Select the Close menu item with Confirm the Close menu item with g. The digital recording is terminated. 190 ba75446e04 06/2007

191 Data output 12.2 Outputting data to the integrated printer General information The integrated printer is operated via the o key (switched on/off) and the f key (manual line feed) on the terminal. The operating status of the printer is indicated by the print LED on the terminal.! Green LED: printer ready for operation! Red LED: printer off or malfunction To print on the integrated printer, the following conditions must be fulfilled:! The integrated printer must be switched on and ready for operation (print LED lights up green, see section ),! The data output is set to the integrated printer (see section ),! A manual or automatic print job must have been given (section ), Note For troublefree operation of the integrated printer, we recommend disconnecting any other devices from the RS232/REC interface. It is not possible to operate the integrated printer and external devices (printer, PC, or analog recorder) on the RS232/REC interface at the same time. ba75446e04 06/

192 Data output Switching on the integrated printer It is only possible to print with the integrated printer if the printer has been switched on. 1 Switch on the printer with o. The print LED lights up green. The printer is ready for operation. Note Line feed with f is only possible when the integrated printer has been switched off (the print LED lights up red) Data output to the integrated printer Data is either output to the integrated printer or to the RS232 interface. You can select where to output the data in the Opt menu. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Select the Int. Prn menu item with Confirm the Int. Prn menu item with g. The data output is switched to the integrated printer ( ). 5 Terminate the Menu mode with m Printing Printing the display When the p softkey function is shown on the display you can always print the current display. Use the p softkey to print the following data:! The data record of the current measured value! The data record of a stored measured value! The graphical representation of a measured data series stored with AutoStore (only on the integrated printer)! Calibration records 192 ba75446e04 06/2007

193 Data output 1 Start the printout of the currently displayed numerical or graphical data with p. You can also start a printout of the current numerical data record on the measuring module. Precondition: AutoRead is not active. 1 Start the printout of the currently displayed numerical data with g. Printing stored data records If there are stored measured values, you can display and print them. 1 Switch to the Display mode. 2 Switch to the storage display with r. 3 Call up the RCL menu with [RCL menu]. 4 Option: Determine the selection criteria for the data in the RCL filter input window (see section ) 5 Select the Print all menu item with Confirm the Print all menu item with g. All data records meeting the selection criteria in the RCL filter input window are printed. ba75446e04 06/

194 Data output Printing the display of the digital recorder If the digital recorder is switched on, the graphical representation of the measured values is also output on the integrated printer at the same time. Precondition: The printer is on (green LED) and the output is switched to the integrated printer (see section ). 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Using 82, select the Dig. Rec menu item. 4 Using g, confirm the Dig. Rec menu item. 5 Select the Print menu item with Confirm the Print menu item with g. Print is active ( ). The recorder strip is printed out as long as the Print menu item is active ( ). Switching off the printout of the digital recorder The printout of the digital recorder can be switched off without terminating the digital recorder. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Using 82, select the Dig. Rec menu item. 4 Using g, confirm the Dig. Rec menu item. 5 Select the Print menu item with ba75446e04 06/2007

195 Data output 6 Confirm the Print menu item with g. Print is switched off. The recorder printout is discontinued, but the screen display of the recorder continues to run. Selecting the print quality You can select the quality of the printout in the menu:! Draft: Not such a high print quality (prints more quickly)! LQ: Higher print quality (prints more slowly) 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Select the RS232/Prt menu item with Confirm the RS232/Prt menu item with g. 5 Select the Prt font menu item with Confirm the Prt font menu item with g. 7 Select the LQ or Draft menu item with Confirm the selected menu item with g. The printing quality has been set. ba75446e04 06/

196 Data output 12.3 Outputting data to an external printer/pc Via the RS 232 interface on the terminal, you can transmit the data to a PC or an external printer. Connect the interface to the devices via the AK T-PC (PC) or AK T- 9PIN/25PIN (ext. printer) cable. The data output automatically switches to the RS232 interface. Warning If a grounded PC/printer is connected, you can also measure in grounded media. Set up the following transmission data on the PC/printer: Baud rate can be selected from: 1200, 2400, 4800, 9600 Handshake Parity RTS/CTS + Xon/Xoff none Data bits 8 Stop bits 1 Socket assignment RS 232 REC 1 RTS 2 RxD 3 TxD 4DTR 5 SG 6 CTS 196 ba75446e04 06/2007

197 Data output Outputting data to the RS232/REC interface To output data to an external printer/pc, the data output must be switched to the RS232/REC interface. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Select the RS232 menu item with Confirm the RS232 menu item with g. The data is output to the RS232/REC interface ( ). 5 Terminate the Menu mode with m Setting the baud rate The baud rate for the RS232/REC interface must be the same as the baud rate of the connected devices. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Select the RS232/Prt menu item with Confirm the RS232/Prt menu item with g. 5 Select the Baudrate menu item with Confirm the Baudrate menu item with g. 7 Use 82 to select the required baud rate 1200, 2400, 4800 or ba75446e04 06/

198 Data output 8 Confirm the selected baud rate with g. The selected baud rate is active ( ). 9 Terminate the Menu mode with m Determining the data format You can determine the form in which the numerical data is sent to the RS232/REC interface. The selection of the data format type determines the data transmission:! ASCII the data is transmitted in the same form as it is displayed: recommended for external printers on the RS232/REC interface! Data The data is transmitted with separators. The data can easily be saved in a database if it is transmitted to a PC. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Select the RS232/Prt menu item with Confirm the RS232/Prt menu item with g. 5 Select the Datformat menu item with Confirm the Datformat menu item with g. 7 Select the Ascii or Data menu item with ba75446e04 06/2007

199 Data output 8 Confirm the selected menu item with g. The selected data format is active ( ). 9 Terminate the Menu mode with m. Data format In the Data format, all data is output in a fixed sequence and separated by semicolons (;). If you output more than one data memory location in the RCL menu, a header designating the individual data columns is automatically output. Data output in the data format with the header: Header Data records Printing the header You can also print the header separately. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Select the RS232/Prt menu item with Confirm the RS232/Prt menu item with g. 5 Select the Datformat menu item with Confirm the Datformat menu item with g. 7 Select the Header menu item with 82. ba75446e04 06/

200 Data output 8 Confirm the Header menu item with g. The labeling of the data in the data format Data is output (e.g. on a printer or the PC). 9 Terminate the Menu mode with m Setting the print interval The print interval sets the time period between the transmission of measured values to the interface. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Select the RS232/Prt menu item with Confirm the RS232/Prt menu item with g. 5 Use 82 to select the Prt Int.... menu item. 6 Use g to confirm the Prt Int.... menu item. The Print interval window appears on the display. 7 Switch the internal printer on or off (on / off) with Go to the fields for the print interval (Interval) and the time unit for the print interval (Unit) with [Next]. Complete the entries. 9 Increase or decrease the value with Go to the fields for the print interval (Interval) and the time unit for the print interval (Unit) with [Next]. Complete the entries. 11 Select the required inputs with Confirm the settings with g. 13 Terminate the input with [ESC]. 200 ba75446e04 06/2007

201 Data output Outputting data to an external printer or PC Connecting the external printer/pc Printing/ transmitting data to the PC In order to transmit data to an external printer or PC, follow the settings in the RS232/Prt menu. allows an external printer to be run on the RS232/REC interface. Connect the external printer to the RS232/REC interface. Printing or transmitting data to a PC is the same as for the integrated printer (see chapter 12 DATA OUTPUT). Note In order to store the data in a file on the PC, a terminal program is required that can continuously store the received data Outputting data to the external recorder To record measured values graphically, you can also connect an analog external recorder to the RS232/REC interface to the terminal. Note Before recording measured values with the external recorder, please observe the following points:! Switch off AutoRange (automatic measuring range switch-over),! Set the measuring range manually (tables with the possible measuring ranges can be found in chapter 15 TECHNICAL DATA, section 15.1 TERMINAL),! Switch the data output to the RS232/REC interface,! Select the measured variable to be recorded in the menu. Selecting the measured variable to be recorded As soon as the data output is directed to the RS232/REC interface and the measured variable to be recorded is selected, the corresponding voltage is output on the RS232/REC interface. 1 Switch to the Menu mode. 2 Use 46 to select the main Opt menu. 3 Use 82 to select the Ana. Rec menu item. 4 Use g to confirm the Ana. Rec menu item. 5 Select the measured variable to be recorded with 82. ba75446e04 06/

202 Data output 6 Confirm the selected measured variable with g. The selected measured variable is active ( ). 7 Terminate the Menu mode with m. The voltage corresponding to the selected measured variable is output on the interface. 8 Switch on the recorder. Note Additional settings can be made on the recorder itself. 202 ba75446e04 06/2007