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1 DO 2003 H V A C R D a t a l o g g e r VELOCITÀ E PORTATA DELL ARIA - TEMPERATURA - TEMPERATURA/UMIDITÀ RELATIVA - PRESSIONE AIR SPEED AND FLOW RATE - TEMPERATURE - TEMPERATURE/RELATIVE HUMIDITY - PRESSURE VITESSE ET DÉBIT DE L AIR - TEMPÉRATURE - TEMPÉRATURE/HUMIDITÉ RELATIVE - PRESSION LUFTGESCHWINDIGKEIT UND DURCHFLUSSMENGE - TEMPERATUR - TEMPERATUR/RELATIVE FEUCHTE - DRUCK VELOCIDAD Y CAUDAL DEL AIRE - TEMPERATURA - TEMPERATURA/HUMEDAD RELATIVA - PRESIÓN

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3 1. Input A for air speed, pressure and Pt100 temperature probes - DIN pole connectors. 2. HOLD symbol: appears when you press HOLD. 3. Battery symbol: indicates a low battery level (fixed symbol) or the auto shut-off mode disabled (flashing symbol). 4. Display lower line relating to the module connected to input B. 5. RS232 symbol: flashes while transferring data to the instrument serial line. 6. REL symbol: appears if you press REL to indicate the instrument is collecting relative measurements. 7. AVG symbol: the display shows the average values detected through the RCD function. 8. Unit of measurement related to the variable viewed on the display upper line (probe connected to input A). 9. <REL/Esc> key: displays the difference between the current value and the one logged when the key was pressed. Within the programs, it cancels the operation in progress without changing the instrument parameters. 10. <MEM/Enter> key: stores the current value to be used for flow calculation. In the programs, it confirms the current value. 11. <UNIT A/Pitot Tcomp> key: selects the unit of measurement for input A. In the programs, it sets manual temperature to compensate the measurement provided by the Pitot tube. 12. <PRINT/Baud Rate> key: activates a data transmission through the RS232 serial output. In the programs, it sets the serial line baud rate. 13. <LOG Start-Stop/Dump Log> key: in measurement mode, it starts and stops storage. In the programs, it starts the download of stored data and increases the displayed parameter. 14. <Probe ZERO/Delete Log> key: allows to set to zero hot-wire speed probes and differential pressure gauges. From the programs, it allows to clear memory data. 15. RS232 9-pole connector. 16. <RCD Start-Stop/RCD Clear> key: starts and stops the Record function; in the programs, it resets the previous Record measurements and decreases the displayed parameter. 17. <PROG> key: activates the instrument programs. 18. <Max-Min-Avg CALL> key: recalls the maximum (MAX), minimum (MIN) and average (AVG) values, measured through the Record function. 19. <UNIT B/DuctCalc> key: selects the unit of measurement for input B. Within the programs, it makes the calculation of pipe flow. 20. <HOLD/SampleTime> key: freezes current measurements. Inside the programs, it sets the number of measurements to calculate the current average. 21. <ON/OFF> key: switches on and off the instrument. 22. Temperature unit of measurement related to the two inputs. 23. Unit of measurement related to the variable displayed on the display lower line (probe connected to input B). 24. MAX symbol: the display indicates the maximum values measured through the RCD function. 25. MIN symbol: the display indicates the minimum values measured through the RCD function. 26. RCD symbol: indicates that the record function is active. 27. LOG symbol: indicates that the logging function is active. 28. Display upper line related to the probe connected to input A symbol: indicates the multiplicative factor (x1000) for channel A. 30. Input B for relative humidity probes and Pt100 temperature probes DIN pole connector

4 INTRODUCTION The DO2003 is a datalogger portable unit, especially designed to make measurements in the field of air-conditioning, heating, ventilation, environmental comfort, energy saving, both in private and industrial sectors, thanks to a complete series of dedicated probes. It measures air speed and flow in ducts, pipe or vents with hot-wire, vane or Pitot tube probes; relative humidity and temperature with combined probes; differential pressure up to 2000 mbar, as well as barometric pressure; temperature with immersion, penetration and surface probes. As a datalogger, it stores up to 12,000 readings that can be transferred to a PC connected to the instrument by means of the RS232C serial port. From the menu, you can configure logging interval, print and baud rate. The "Record" (RCD) function calculates the maximum, average and minimum values. The instrument comes out with other additional functions: relative measurement, Hold function, zero correction for differential pressure gauges and hot-wire probes

5 KEYBOARD DESCRIPTION Introduction The DO2003 keyboard has 22 indication LEDs and 12 keys. The keys provide a main function indicated on the key itself, as well as one or two secondary functions indicated just over or under the key. The main function is active when the instrument is in measurement mode, while the secondary functions are activated when the DO2003 is in the programs. For example, the key activates the function of start and stop logging when in measurement mode, while, in the programs, it starts the Dump Log function or increases the value of the current parameter. The display provides alphanumeric indications: the values of the measurements detected by the inputs and the description of a current function. As each display line has got three characters available, some words are divided between the two lines: for example, the caption PRESSU is divided into PRE on the upper line and SSU on the lower one, the word SPEED is displayed as SPE on the first line and ED on the second one, TEMP appears as TE on the upper line and MP on the lower one, The following table shows the characters as they appear on display: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A C E F h I - - L o P - S U LED Description The LEDs (red luminous points: Light Emitting Diodes), at the upper side of the keyboard, provide indications about the units of measurement and the displayed type of measurement. They are divided into three groups: the one on a pink background relates to input A and to the display upper line, the one on a light blue background refers to input B and to the display lower line. The two C and F LEDs indicate the unit of measurement of temperature, valid for both channels. Channel A LEDs (they refer to the indication of the display upper line) m/s Ft/min Air speed measurement through a hot wire probe, a vane probe or a Pitot tube. km/h mph l/sec cfm Flow measurement through a hot wire probe, a vane probe or a Pitot tube. m 3 /h Temp mbar Pa mmh 2 O InchW Temperature provided by the RH/temperature probe connected to input A. The unit of measurement is provided either by the C or by the F LED. Pressure measurement through a barometric probe, a differential gauge or a Pitot tube

6 Channel B LEDs (they refer to the indication of the display lower line) RH% Relative humidity measurement. g/m 3 Absolute humidity measurement. Temperature provided by the RH/temperature probe connected to input B. The unit of Temp measurement is provided either by the C (Celsius) LED or by the F (Fahrenheit) LED. Td Dew point expressed in C (Celsius) or in F (Fahrenheit). DI Discomfort Index provided by the relative humidity probe connected to input B. ET Net Index provided by the relative humidity probe connected to input B. Mem In the "Duct calc" program for flow calculation, it indicates that the number on the of display lower line is the number of logged samples. The value on the display lower line is the area of the section for flow calculation. m 2 C and F LEDs (they refer to the indications of both the display lines) C Temperature measurement is expressed in Celsius degrees. F Temperature measurement is expressed in Fahrenheit degrees. ON OFF Auto-Power-Off ON/OFF Key Press the ON/OFF key to switch on and off the instrument. The check of the probes connected to the inputs is made upon the power on and not when the instrument is already operating. Therefore, after replacing a probe it is necessary to switch the instrument off and on again. It is suggested to replace probes when the instrument is off. The instrument is provided with the AutoPowerOff function that automatically switches off the instrument after 8 minutes that no key is pressed. The AutoPowerOff function can be disabled in this way, by using the HOLD key: with the instrument off, press and hold down the HOLD key and, at the same time, press <ON/OFF> to switch the instrument on. Release HOLD only when the switching on routine is over. In this case the battery symbol flashes to remind the user that the instrument will not automatically shut-off, but, to do it, you need to press <ON/OFF>. HOLD / SampleTime Key If you press this key, in the standard operating mode, the measurement will be frozen; HOLD will appear on display: press this key to go back to standard measurement. The key secondary function (Sample Time) indicates the number of samples used for the mobile average (or current average) calculation in stream measurements. Because a reading per second is collected, it also represents the interval of time in which the current average is calculated. The value goes from 1 (no average) to

7 REL / ESC-Discard Key In measurement mode, it displays (for each channel) the difference between the current value and the value measured when the key was pressed. The REL symbol appears at the bottom of the display; to go back to standard measurement, press the key again. In the programs, it deletes or cancels the active function. UNIT B / Duct calc Key In measurement mode, it selects, among the variables available in the light blue LED area, the variable to be viewed on the display lower line. The available variables change accordingly to the instrument mode (i.e.: measurement mode or in the programs) and to the probe connected to input B. The DuctCalc subfunction (PROG key >> UNIT B key) starts flow calculation when the air speed probe is connected to input A. See the introduction of the chapter concerning air speed on page 64. MEM / ENTER Key The MEM key main function is used for flow calculation inside the DuctCalc function to store a single point (for more details, see the chapter concerning the DuctCalc function on page 65). The secondary function ENTER confirms the displayed current parameter. UNIT A / Pitot Tcomp Key In measurement mode, it selects the variable to be viewed on the display upper line among the variables included in the pink area. The active variables depend on the probe connected to input A.. Pitot Tcomp secondary function, selectable from program through the keys: PROG >> UNIT A, allows to enter the air temperature value manually when you are using a Pitot tube probe without thermocouple and no Pt100 probe is connected to input B: in this case the instrument uses this temperature to compensate the measurement (see details in the Pitot tube chapter on page 73)

8 CALL Max-Min-Avg Key If you press this key repeatedly, you will recall the MAX, MIN and AVG (average) values of data detected by means of the Record function (RCD key). If you press the key again, the instrument switches to standard measurement. The function is active only if some data have been previously recorded and if the Record function is active at that time. PROG Key The PROG key let you go through the instrument programs. Press PROG to jump to the next program. Press ENTER to select a single program. To increase or decrease the current value of a parameter, use the arrow keys (sub-function of LOG and RCD keys). Press MEM/ENTER to confirm a parameter; on the contrary, press REL/ESC-Discard to quit without confirming. Here is a short description of the programs as they appear (same order) when you press PROG: PRG STD (Program Standard): this program activates the key secondary functions. For example, the PRINT/BaudRate key will have the function to set the baud rate and not its PRINT primary function. LOG INT (Logging interval): it represents the interval between two consecutive loggings (LOG) and the data dump frequency to the RS232C serial port (PRINT). To set a new interval, use the arrow keys and press ENTER to confirm. The available values are: 1, 2, 5, 10, 15, 30, 60 seconds and 2, 5, 10, 15, 30, 60 minutes. LOG OPT (Logging options): when the instrument is in logging mode, it controls the auto power off between two consecutive loggings. If you press ENTER (LOG OPT >> ENTER), the word OFF will appear on the display upper line, while the parameter current status will appear on the lower one: YES or NO. If the set logging interval is smaller than 1 minute, the instrument will remain always on, whatever is the value of the LOG OPT parameter. If the interval is bigger than 1 minute, or equals it, LOG OPT = YES will switch the instrument off during the interval between two measurements, while LOG OPT = NO will let the instrument always on. Press ENTER to confirm the parameter selected by means of the arrow keys. SCT m 2 (Section m 2 ): it represents the area of the section used to calculate duct or pipe flow; it is expressed in m 2 and it goes from.001m 2 (10cm 2 ) to 1.999m 2. SCT INC 2 (Section inch 2 ): it represents the area of the section used to calculate duct or pipe flow, it is expressed in inch 2 and it goes from 1 inch 2 to 1999 inch 2. This value is automatically converted into m 2 by the instrument, thus, if you recall the area parameter during flow calculation, the corresponding value in m 2 will be displayed. DATE: this is a program to set date and time. From the DATE screen-page, press ENTER: the last two digits of the year will appear. Use the arrows to select the correct value and press ENTER to confirm. The month appears (MonTH): use the arrows to select the correct value and press ENTER to confirm. Day (DAY), hour (HOU) and minute (MIN) ranges will then appear: when confirming the minute value, the instrument quits the program and returns to the measurement mode. SET MEA (Set measures): it provides the list of the variables to be printed (PRINT command), to be logged (LOG command) and to be displayed (UNIT A and UNIT B keys). The

9 corresponding unit of measurement is required for air speed, pressure, flow and humidity physical quantities. The selection is made through the arrow keys and confirmed by ENTER. This function also allows to set currently displayed variables as print and logging ones. Procedure: 1. press PROG and hold it until SET MEA is displayed. 2. press ENTER to access the desired function. The indication YES or NO will appear: if you select NO, print and logging will use the current units of measurement; press ENTER to confirm, and the instrument will return to the measurement mode. If you select YES and press ENTER to confirm, you can start setting. 3. PRESSU will be displayed: use the arrows to select pressure unit of measurement (mbar, Pa, mmh 2 O or inchw) and press ENTER to confirm. 4. FLOU will be displayed: use the arrows to select flow unit of measurement (l/sec, m 3 /h or cfm) and press ENTER to confirm. 5. SPEED will be displayed: use the arrows to select air speed unit of measurement (m/sec, km/h or cfm) and press ENTER to confirm. 6. RH will be displayed: use the arrows to select the kind of measurement connected to humidity (%RH, g/m 3, TD dew point, DI discomfort index or ET net index). Press ENTER to confirm and the instrument will switch again to the measurement mode. TEMPER (temperature): it chooses the unit of measurement between Celsius ( C) and Fahrenheit ( F) degrees. PRINT / Baud Rate Key The PRINT key sends data being logged to the RS232C serial port of the instrument. The print interval is set through the LOG INT program. Before pressing PRINT to start data print, set the baud rate value with which data have to be downloaded from the instrument to the PC. To do it, press PROG just once to enable the key sub-functions (from measurement mode the instrument turns into PRG STD), press PRINT/BaudRate and use the arrows to select the maximum value equal to 38.4 (38400 bauds). Press ENTER to confirm. While connecting, the software of the PC linked to the DO2003 (DeltaLog3) will automatically set the same value, that is bauds. If you are using a program others than DeltaLog3, be sure that the baud rate value is the same both for the instrument and for the PC: the communication will work only in this way. RCD Start-Stop / RCD Clear / Key The Record function stores the maximum, average and minimum value of measurements, updating them every second, as new samples are recorded. To start the function, press RCD once, to stop it, press RCD again. The indication RCD on display means that the function is active. Recorded data will be added to those already stored, thus, if you wish to start with a new measuring session, you have to delete the previous values by using the RCD Clear sub-function (PROG key >> RCD key >> ENTER key to confirm)

10 If you press "Max-Min-Avg CALL" repeatedly, the MAX (higher), MIN (lower) and AVG (average) values relating to all data available on memory will be sequentially displayed: this can be made after closing the measurement session or, in real time, by pressing RCD first, to start recording, and then "Max-Min-Avg CALL" to view the MAX, MIN and AVG values. Note: the UNIT B/DuctCalc key uses a Record on command. Unlike the record started through the RCD key, where the sampling interval equals one second, in flow calculation, the MEM key has to be pressed every time a new sample has to be added. When a new sample is measured, the counter on the display lower line, will increase by one unit. The max, min and average values of processing measurements can be also viewed here (see details on page 65). In the programs, the key has its secondary function, that is, it decreases the current parameter. Warning: data detected through the Record function cannot be downloaded to a PC. LOG / Dump Log / Key The LOG key is used either to start or to stop logging of a new data block to be stored in the instrument built-in memory. The frequency with which data are stored is set through the LOG INT program (press PROG twice >> ENTER >> use the arrows to select the interval >> press ENTER to confirm). The data stored between a consecutive start and stop form a block. Each block ends with the indication of the maximum, minimum and average value of the samples. The LOG indication will remain lit for the whole logging period. The DO2003 provides a function that allows to switch off the instrument in the time between a logging and the other: this function is controlled by the LOG OPT parameter (press PROG 3 times). When the logging interval is lower than a minute, the instrument will always remain on while logging; when the interval equals one minute or is higher, if the parameter LOG OPT= YES has been configured, the instrument will switch off in the time between a logging and the next one, while, on the contrary, if LOG OPT=NO has been set, it will remain always on. In the programs, the secondary function of this key is to decrease the current parameter. As secondary function (keys: PROG >> LOG >> ENTER), the LOG key commands the download of stored data: when you press ENTER, the data stored in the instrument memory are transferred to the PC connected to the serial port. Either DeltaLog3 (version 4.0 or higher) or Windows HyperTerminal have to be installed on the computer (see the description of the connection to a PC on page 86)

11 ProbeZERO/ Delete Log Key Before being used, differential pressure gauges and Pitot tube or hot-wire air speed probes need to be set to zero. The key Probe ZERO has this function: for details on how it works, see the chapters concerning the different probes. The secondary function of this key is to clear the whole memory content (press PROG >> Probe ZERO DEL LOG is viewed >> press ENTER to confirm). In order to know which is the available memory space, press PROG and then CALL: the number of available pages will appear from 1 to ; ALL means that the whole memory space is available (2000 pages)

12 THE PROBES The datalogger probes are equipped with an "intelligent" module (SICRAM) that works as an interface between the sensor in the probe and the DO2003 unit. Inside the module there is a microprocessor circuit with a permanent memory which allows the datalogger to recognise the type of connected probe: temperature, humidity, pressure, air speed, the probe calibration data are stored in the memory. In this way the probes are interchangeable and they can be used on any DO2003 indifferently. PROBE CONNECTION The recognition of the probes takes place upon the instrument power on, and not when the instrument is already on, thus if a probe is connected when the instrument is already operating, it has to be switched off and on again. The two DO2003 inputs are identified by an A (left input) and by a B (right input). Air speed, flow, pressure and temperature probes have to be connected (and are thus recognised) to input A. On the contrary, RH/temperature probes and Pt100 temperature probes have to be connected (and are thus recognised) to input B. For more details concerning the probes, see the paragraphs related to the single measurements. HOW TO MEASURE 1. Use the ON/OFF Key to Switch On and Off the Instrument To turn on the instrument, press and release the ON/OFF key. This operation activates the self shut-off timer: after approximately 8 minutes the keyboard is inactive, the instrument will shut-off. If you want to disable the self shut-off function, hold down the HOLD key throughout the whole switching-on routine, the battery symbol will flash once a second to show that the self shut-off function has been disabled. Upon power on, all the display digits and symbols, as well as all the keyboard LEDs will be lit up: in this way you can check if they work properly. The change to standard operation is automatic. 2. Display Control After all segments have lit up, the instrument is ready to measure and uses the unit set before the instrument had been switched off. If a probe is either broken, not properly connected, or if it is measuring a value beyond the provided range, the Err indication will be displayed: check the sensor and/or the connector. If no probe is connected to the inputs, a dotted line (- - -) will be displayed. 3. Selecting the Unit of Measurement Press the Unit A key repeatedly to select the unit of measurement related to input A (visible on the display top side); press Unit B to select the unit of measurement related to input B (visible at the bottom of the display)

13 4. Switching off the Instrument Press ON/OFF to switch the instrument on or off. If the AutoPowerOff function is active, the instrument can switch off while measuring: press ON/OFF to switch it on again. The instrument switches automatically off after 8 minutes the keyboard is inactive, except if: a) The instrument is in RCD mode. b) The AutoPowerOff function is disabled. In these two cases the instrument will switch off only if you press ON/OFF. c) The instrument is downloading logged data (DUMP LOG). d) The instrument is processing the immediate transfer of data to the serial port (PRINT). e) The instrument is in logging mode (LOG). If the battery is completely flat, the instrument will switch off, and any logging or data dump operation is interrupted. When switching on the instrument again, you have two choices: 1. If batteries are low, but not completely flat, upon power on the indication LOU BAT will be displayed, together with the battery symbol fixed. The PROG key activates (PROG >> LOG >> ENTER) data dump even if battery is low. In these conditions, no new logging session can be started. 2. If batteries are completely flat, when you press ON/OFF the LEDs will be lit up for a few seconds, the instrument will make a short sound (beep) and will switch off. The display will remain off. 5. Varied Operations For the following operations, see the function description of each key: HOLD, relative measurements, record RCD, DATA CALL, PRINT, storage on LOG internal memory, download of logged data, memory clear, set of working parameters. AIR SPEED MEASUREMENT The probes of AP471, AP472 and AP473 series measure speed and flow of an incident airstream and some of them can also measure air temperature. The applied principles of measurements are: hot-wire for the AP471 series, vane for the AP472 series and Pitot tube for the AP473 series. The probes of AP471 and AP472 series are, or can be, equipped with a telescopic shaft to make measurements in hard-to-access areas easier (such as in duct inlets/outlets). Their typical applications include: the control of air speed and flow on conditioning, heating and cooling plants, the definition of environmental comfort, etc. Hot-wire probes are generally used for accurate measurements in environments with a medium-low air speed (up to 10 m/s), vane probes in environments with an air speed from 5 to 40m/s, Pitot tube probes in environments with an air speed higher than 40m/s. Also the temperature of the fluid to be measured has to be taken into consideration: hot-wire probes measure streams having an 80 C max. temperature, vanes reach 140 C, while Pitot tube probes measure the speed of air streams having temperatures up to 600 C, according to the model

14 The measurements provided by the probes are: air speed, air temperature and flow. Connect the probe to input A and switch on the instrument. Use the UNIT A key to select the unit of measurement of the value viewed on the top of the display. The following units are available: For air speed: m/s, km/h, ft/min, mph; For air temperature: C and F; For flow: l/s, m 3 /h, cfm. Flow Measurement The measurement of air flow requires to know the area of the pipe or of the vent perpendicular to the flow: in the DO2003 programs there are two specific items, SCT m2 (SECTION m 2 ) and the corresponding "SCT INC2" (SECTION inch 2 ), through which you can configure this parameter either in m 2 or in inch 2. To enter the area, press PROG several times to display either SCT m 2 (area in m 2 ) or SCT INC 2 (area in inch 2 ), then press ENTER. Use the arrows to set the area value and press ENTER to confirm. General Remarks on Operation By moving the probe inside a stream, speed and flow can change both their position in the space (from a point to another) and their performance over the time (in the same position, but in subsequent moments): this is particularly true when the involved area is quite big and when some turbulences are generated in front of a ventilating grill or a diffuser. The DO2003 provides some solutions to get a correct measurement even before these elements of disturbance. 1) Space Average (Duct calc Function) It is always suggested to record more measurements in different positions and to consider as valid data only average values. Through the Duct Calc function (subfunction of UNIT B key), the DO2003 can record several measurements and provide the relating minimum, maximum and average value. In particular, the average value is the most important one in this kind of measurements. Procedure: Press UNIT A to select the variable of which you want to get the maximum, minimum and average value. Then press PROG >> UNIT B to activate the DUCT CALC function: the display upper line will show the instant value of the selected variable (speed, flow or temperature), while the lower line will indicate the number of measured points (at the beginning the value will be 0 because, every time DUCT CALC is started, the values of previous measurements will be deleted). Place the probe in the first point to be measured and press MEM to record the first value/point. Repeat this operation for all the other points to be measured and press MEM every time you want to get a measurement: the indicator will provide the number of recorded samples. While recording, or after recording, press Max-Min-Avg Call: the max, min and average values of the selected quantity will be viewed. To quit this function, press ESC (REL key). In general, the bigger the number of recorded measurements is, the higher the accuracy of the results will be

15 2) Moving Average The Duct Calc function provides a space average of acquired values in order to compensate speed differences between a point and another in the pipe section. There is also another cause of error due to stream variations over the time: actually, a stream is not steady but, on the contrary, it can decrease or increase even in the same point. In order to compensate this second source of instability, a time moving average of the last n acquired measurements can be provided: thus n>1 (the displayed valued) will not correspond to a single acquired value, but to the current average of the last recorded and continuously updated n measurements. To set the n value, use the SAMPLE TIME sub-function of the HOLD key: press PROG >> HOLD, use the arrows to select the desired n value and press ENTER to confirm it. n can be set between 1 (no average) and 100. Note: grills and diffusers with reclining fins cause stream measurement errors because of turbulences. These turbulences develop because part of the stream meets an obstacle (the fin) and, consequently, slows down, while the rest of the stream speeds ahead. In this case, to get correct measurements, it is suggested to temporarily insert, in front of the ventilating grill, a pipe, having a length twice the length of the grill diagonal. Measurements have to be taken at the ends of this pipe. The area to be considered for flow calculations will be that of the temporary pipe positioned between the ventilating grill and the probe. PIPE SECTION TEMPORARY PIPE D PIPE PROBE AIR VENT L = 2 x D Unit Conversion Table m/s ft/min km/h mph 1 m/s ft/min (1 foot/minute) km/h mph (1 statute mile/hour)

16 AP471 S1 - AP471 S2 - AP471 S3 HOT WIRE PROBES FOR THE MEASUREMENT OF AIR SPEED EQUIPPED WITH SICRAM MODULE AP471S probes have to be connected to the DO2003 A input. AP471 S1 and AP471 S3 probes measure incident air streams up to 40m/s; the AP471 S2 probe, equipped with an omni-directional sensor, provides speed measurements up to 5m/s in any direction of air stream incident on the probe. Air speed measurement is temperature compensated in the range from 0 to 80 C. The probes measure ambient temperature in the range from -30 C to +110 C. AP471 S1 AP471 S3 Zero Command AP471 S1, AP471 S2 and AP471 S3 modules are factory calibrated and do not require any calibration by the user. Before carrying out a measurement, you have to adjust the zero point of the probe. This means that, failing the wind, speed and flow values provided by the probe, at a temperature next to that of the airstream to be measured, shall correspond to zero. Follow these steps: slide the cylindrical sleeve over the probe, so that the speed sensor window at the top is completely closed. LINE OF STREAM DIRECTION SPEED SENSOR COMPENSATION SENSOR CYLINDRICAL SLEEVE

17 Place the head of the probe in the airstream to be measured and press PROBE ZERO. Any fault (drifts) related to speed and flow instant values will be cleared. Operation Extend the telescopic shaft as much as necessary, taking care that the cable passes through the handle without any problem. Cover the speed sensor and reset the measurement value, as detailed in the previous paragraph. Uncover the sensor and position the probe in the airstream to be measured holding the line on the top of the probe parallel to flow, as indicated in the following pictures. Indicator of airstream direction Probe Top The probe has to stand in orthogonal position with respect to the flow and it shall not to be inclined: OK NO Now you can carry out your measurement, pursuant to the indications provided in the first paragraphs of this chapter. Probe Care and Maintenance The speed sensor of AP471 S1, AP471 S2 and AP471 S3 probes is heated up and, in presence of vapours or gases, it might cause a fire or an explosion. Avoid using these probes if inflammable gases are available. Check that no gas leak or explosive product vapour be present in the environment where measurements have to be carried out. Do not touch sensors with your fingers. Use pure alcohol to clean sensors

18 Dimensions min max 87 Ø30 Ø13 Ø8 AP471 S1 e AP471 S min 880 max Ø30 Ø13 Ø8 AP471 S3-69 -

19 AP472 S1 - AP472 S2 - AP472 S4 VANE PROBES FOR AIR SPEED MEASUREMENT EQUIPPED WITH SICRAM MODULE AP472 S1, S2 and S4 vane probes are to be connected to a DO2003 multifunction instrument. They are used to measure speed and flow of an incident airstream. AP472 S1 and S4 probes can measure temperature also by means of a thermocouple type K. They are equipped with a telescopic shaft to make measurements easier in hard-to-reach areas (i.e.: duct outlets and vents). The table below shows speed and temperature ranges of these probes: AP472 S1 AP472 S2 AP472 S4 Speed (m/s) Vane max. measurement and operating temperature ( C) Temperature Sensor K Thermocouple K Thermocouple Diameter (mm) Bigger diameters are suitable for measurements in turbulent flows having a low-medium air speed (i.e. in front of pipes). Smaller diameters are suitable for applications where the body of the probe has to be much smaller than the cross section of the duct where measurements have to be carried out (i.e.: air ducts). Calibrations AP472 S1, S2 and S4 are factory calibrated and do not require any calibration by the user. Operation Slide the telescopic shaft, where available, as much as necessary and take care that the cable can pass through the tube without any problem. Position the probe in the airstream to be measured and hold the vane axis parallel to the stream, as indicated in the following figure

20 The probe has to stand orthogonal with respect to the flow and it shall not be inclined: OK NO The probe is correctly positioned in the airstream when the measured value is the highest one. Carry out measurements pursuant to the indications provided in the first paragraphs of this chapter. Probe Care and Maintenance Probe performances, particularly at lowest speeds, depend on the friction with which the vane turns around its own pivot. Low friction levels assure better performances. To guarantee this feature, it is suggested neither to force, lock or rotate the vane with fingers, nor to position it, as much as possible, in airstreams containing elements that might cause the probe to get dirty

21 Dimensions ø100 ø60 ø16 AP472 S1 AP472 S2 AP472 S4-72 -

22 AP473 S1 AP473 S4 PITOT TUBE PROBES FOR THE MEASUREMENT OF AIR SPEED EQUIPPED WITH SICRAM MODULE The Pitot tube is an easy method to measure air speed in hard-to-reach positions, such as air ducts, and in applications where air speed and temperature are very high. As no air passes through it, the Pitot tube is particularly suitable for measurements in hostile environments. Measuring Principle Total Pressure Hole Static Pressure Holes STATIC PRESSURE SPEED PRESSURE TOTAL PRESSURE The pressure inside the duct is the result of three different pressures: 1) atmospheric pressure (barometric B) 2) static pressure Ps 3) dynamic pressure Pv due to the non-null speed of the air inside the duct. The following formula provides the air speed: as you can see, it depends on the three pressures and on air temperature. (1) 1000 T v = Pv B Ps [v] = m/s [B] = mbar [Pv] = [Ps] = Pa [T] = K The Pitot tube provides the difference between the pressure available on the front mouth and the one measured through the lateral holes, that is Pv dynamic pressure: (Ps+Pv) Ps = Pv

23 If Ps is lower than 2500 Pa (=25mbar), the term approx. 1% Ps can be disregarded as the error is of AP473 S1 AP473 S4 Modules AP473 S1,, AP473 S4 modules work as interfaces between the Pitot tube and the DO2003. Each module can be connected to any Pitot tube with the related thermocouple type K, where provided. With temperature and atmospheric pressure standard conditions, S1 has a 40m/s full scale, S2 a 55m/s full scale, S3 a 90m/s full scale and S4 a 130m/s full scale. The modules of AP473 series are equipped with two pressure inputs to be connected to the Pitot tube outputs and with an input for thermocouples type K. The measurements provided by the modules are: air speed, differential pressure, air temperature measured by a thermocouple and flow. Press UNIT A to select the units of measurement of the displayed instant value: for air speed: m/s, km/h, ft/min, mph for differential pressure: Pa, mbar, mmh 2 O e inchw for temperature: C, F for flow: l/s, cfm, m 3 /h. Operation Insert the SICRAM module connector into input A of the instrument; connect the Pitot tube outputs (pressure and thermocouple) to the module. Introduce the Pitot tube in the airstream to be measured, positioning the little rod at the bottom of the tube parallel to the flow, as indicated in the following figure

24 The graph below shows the error in case of misalignment: Pv % ERROR ANGLE The axis of abscissas shows the rotation angle around the vertical axis with respect to the flow direction (yawing), the ordinate axis shows the % error on Pv differential pressure measurement. As you can see, a difference of more than 10 C implies an error in the differential pressure measurement lower than 0.5%. The function that provides the speed rate report (1) at page 75 is affected by temperature and by atmospheric pressure, as well. Temperature is measured by the thermocouple connected to the module, when available; if no thermocouple is connected to the Pitot tube, but a Pt100 temperature probe is connected to input B of the instrument, the instrument will consider the temperature value provided by this probe for compensation. As alternative, you can enter the temperature value manually by means of the PititTComp key: press PROG >>UNIT A >> use the arrows to enter the air temperature value >> press ENTER to confirm. For atmospheric pressure, use the 1013mbar default value. Dimensions of Pitot Tubes T1- T2- T3- T4- t Diameter d (mm) d Point Length t (mm) L Length L (mm) Ordering Code (*) T1-300 T2-400 T2-600 T3-500 T3-800 T3-800TC T4-500 T4-800 T4-800TC T T4-1000TC (*) TC = Pitot tubes with thermocouple type K

25 TEMPERATURE MEASUREMENT Pt100 C) temperature probes can be connected to both A and B inputs; all probes are factory calibrated. You can choose between C and F every time you have to display or print any value. To carry out a temperature measurement by immersion, put the probe (for 60 mm, at least) into the liquid where you want to make the measurement; the sensor is placed inside the tip of the probe. For penetration measurements, the tip of the probe has to penetrate for 60mm at least, the sensor is placed inside the probe tip. In order to measure temperature in frozen blocks, it is convenient to use a mechanical tool to make a hole where a pointed probe has to be introduced. To make a correct surface (contact) measurement, the surface to be measured has to be flat and smooth, the probe has to be perpendicular to the plane to be measured. Interposing a drop of conductive paste or oil (do not use neither water nor solvents) would help make a correct measurement. Furthermore, this improves the response time, too. RELATIVE HUMIDITY MEASUREMENT The Relative Humidity probe has to be connected to input B of the instrument. Humidity probes provided for a DO2003 are RH/ temperature ones: the humidity sensor is capacitive type, while the temperature one is a Pt100. The probes are provided with an 8-pole DIN connector module having a microprocessor circuit with a permanent (non-volatile) memory to store calibration data. The instrument measures both relative humidity and temperature and, starting from a mbar barometric pressure fixed value, it calculates the following derivative quantities: 1. g/m 3 = grams of vapour in a cubic metre of dry air 2. Td = dew point (in C or F) 3. DI = Discomfort Index 4. ET = Net Index Use the UNIT B key to select the quantity to be viewed on the display second line. For more details concerning the meaning of Discomfort index and Net index, see the paragraph Humidity and Quality Indices (Comfort indices) at page 77. The measurement by means of a RH/temperature probe has to be carried out introducing the probe in the area where you want to record the parameters. Keep the probe far from elements that might interfere with measurements, such as heat or cool sources, walls, air-streams, etc. Avoid sudden rises/falls in temperature that would cause condensate. Reading in a condition with no thermal shocks is practically immediate; on the contrary, in a condition involving thermal shocks, you have to wait until the probes and their housing have reached a thermal equilibrium to prevent irradiation or heat absorption on the relative humidity sensor, which would cause a wrong measurement: temperature affects relative humidity. Calibration of a RH/Temperature Probe The instrument is already calibrated and, normally, no additional calibration by the user is required

26 Humidity and Quality Indices (Comfort Indices) Everybody knows how environmental conditions affect the human feeling of good health: particular values of temperature, humidity and air speed turn out to be unpleasant if not unbearable to most people. Whereas it is easy to quantify the relationship between the measurement of a single variable and its effects on human beings, it is much more difficult to provide an indication of the combined effect deriving from all of the variables. For this reason, different valuation systems have been introduced to get the formulation of the climate quality indices (Comfort Indices). The DO2003 provides two indices: Discomfort Index (DI) and Net Index (ET). These two indices are viewed if the instrument is connected to a RH/temperature probe (such as, for example, a HP472AC). The Net Index depends on air speed, as well, but its effect is negligible. DI Discomfort Index It is defined as follows: DI H = 0.81 T + (0.99 T 14.3) where T = temperature in C and H = relative humidity in %. According to the value provided by the DI index, climatic conditions might be defined comfortable, uncomfortable or unbearable: Comfortable Slightly Uncomfortable Uncomfortable Highly Uncomfortable Unbearable ET Net Index It is defined as follows: ET 37 T = H v 0.75 H where T = temperature in C, H = relative humidity in % v = air speed in m/s. ET/NI provides the so called apparent temperature : in fine climatic conditions, the Net Index approaches the T temperature expressed in C (Celsius) degrees. As climatic conditions get worst, humidity weight and air speed become always more evident and the Net Index provides an apparent temperature that reflects the human typical feelings and deviates significantly from the temperature value: In a hot climate, NI increases as temperature and/or humidity increases In a cool climate, NI decreases as temperature decreases and as humidity increases

27 PRESSURE MEASUREMENT The DO2003 allows to carry out measurements of barometric pressure (PP472 module), as well as of differential pressure (PP473 S1 PP473 S8 modules). The pressure modules have to be connected to input A of the instrument. Press UNIT A to change the unit of measurement of the displayed instant value. The following units of measurement are available: mbar, Pa, mmh 2 O and inchw. BAROMETRIC PRESSURE MEASUREMENT - PP472 MODULE The PP472 module measures the barometric pressure applied to its input in the mbar range. Resolution equals 0.1 mbar over the whole range of measurement. The fluids in contact with the diaphragm have to be dry and non-corrosive air or gases. PP473 MODULE FOR DIFFERENTIAL PRESSURE MEASUREMENT PP473 S1, S2,, S8 modules measure differential pressures having 10, 20, 50, 100, 200, 500, 1000 and 2000 mbar full scales. The UNIT A key changes the unit of measurement of the instant value. Zero Command In differential probes there might be a slight difference between the two inputs, so that the instrument, even if the pressure applied to the two inputs of the probe is the same, does not display the value zero. For this purpose, the instrument is provided with a reset command of the differential value: leave the inputs of the probe open, so that they can record the same pressure and press the PROBE ZERO reset key: the instant value is set to zero. The reset can be performed only if the difference between the two inputs of the module is lower than 5% of the full scale

28 WARNINGS AND OPERATING INSTRUCTIONS 1. Do not expose the probes to gases or liquids that could corrode the probe sensor or the probe itself. Clean the probe carefully after each measurement. 2. Do not bend the probe connectors, forcing them upward or downward 3. Do not bend or force the contacts when inserting the probe connector into the instrument. 4. Do not bend, deform or drop the probes, as this could cause irreparable damage. 5. Always select the most suitable probe for your application. 6. Do not use probes in presence of corrosive gases or liquids; the sensor container is made of AISI 303 stainless steel, while the contact probe container is of AISI 303 stainless steel plus silver. Avoid contact between the probe surface and any sticky surface or substance that could corrode or damage it. Should the sensor break or become faulty, it may be replaced. In this case, the probe must be recalibrated. 7. Above 400 C and below 40 C, avoid violent blows or thermal shocks to PT100 temperature probes; this could cause irreparable damage. 8. To obtain reliable temperature measurements, rapid temperature variations must be avoided. 9. Temperature probes for surface measurements (contact probes) must be held in vertical position with respect to the surface. Apply oil or heat-conductive paste between the surface and the probe in order to improve contact and reduce reading time. Do not use water or solvent for this purpose. 10. Temperature measurements on non-metal surfaces usually require a great deal of time; this is due to low heat conductivity of non-metal materials. 11. Probes are not insulated from their external casing; be very careful not to come in contact with live parts (above 48V): this could be extremely dangerous for the instrument, as well as for the operator who could be electrocuted. 12. Avoid taking measurements in presence of high frequency sources, microwaves or large magnetic fields; results could be not very reliable. 13. Clean the probes carefully after use. 14. The instrument is water resistant, but is not watertight and therefore, should not be immersed in water. Should the instrument fall into the water, take it out immediately and check for water infiltrations into it. Gently handle the instrument in such a way as to prevent any water infiltration from the connectors side. Unconnected connectors should be closed using the connector protections

29 INSTRUMENT SIGNALS AND FAULT CONDITIONS The following table lists all indications displayed by the instrument in different operating situations. ERR This message displayed at the probe input, indicates that the probe has been disconnected No probe is connected to the input. OFL LOU BAT Measurement overflow: the probe is measuring a value exceeding the measuring range. This message appears after the instrument has been switched on; it indicates that switch off is due to a too low battery voltage of the instrument while in logging mode or in serial output mode (PRINT). Batteries should be replaced even when the low battery signal does not appear on display. The message appears even when the battery level is too low to start a logging operation; in this case, the operation is cancelled. Replace the batteries; always use fresh new batteries and good quality ones; do not use old batteries or partly used batteries

30 LOW BATTERY WARNING AND BATTERY REPLACEMENT When the batteries are running low, the symbol appears on display. In this case, batteries should be replaced as soon as possible. If you are still using the instrument and the battery voltage keeps falling, this means that the instrument is no longer able to ensure a correct measurement When AutoPowerOff is deactivated, the symbol flashes about once per second. Low battery condition prevails upon all other instrument warnings. If the instrument is logging and battery voltage falls under the minimum operating level, logging operation is suspended, in order to avoid data loss. The interruption of the logging operation is preceded by the battery symbol on display. To replace batteries, switch the instrument off, and unscrew the battery cover. Replace the batteries (4 1.5V alkaline batteries - type AA) following the indicated polarity. After replacing the batteries, screw the cover on. AFTER REPLACING THE BATTERIES WE RECOMMEND THAT YOU CHECK CLOCK DATA AND PARAMETERS SETTINGS MALFUNCTIONING UPON POWER-ON AFTER BATTERY REPLACEMENT After replacing the batteries, the instrument may not restart correctly; in this case, repeat the operation. After disconnecting the batteries, wait a few minutes, in order to allow circuit condensers to discharge completely; reinsert batteries. WARNING UPON BATTERY USE Batteries should be removed when the instrument is not used for an extended time Flat batteries must be replaced immediately. Avoid batteries leaking. Always use good quality leakproof alkaline batteries

31 INSTRUMENT STORAGE Instrument storage conditions: Temperature: C. Humidity: less than 90% R.H., no condensation. Do not store the instrument in places where: 1. Humidity is high. 2. The instrument may be exposed to direct sunlight. 3. The instrument may be exposed to a high temperature source. 4. The instrument may be exposed to strong vibrations. 5. The instrument may be exposed to steam, salt or any corrosive gas. The instrument case is made of ABS plastic material: do not use any kind of solvent for cleaning

32 RS232C SERIAL INTERFACE DO2003 is equipped with the galvanically isolated RS-232C standard serial interface, and supplied with a null-modem connecting cable, with SUB-D 9 pin female connectors (order code: 9CPRS232). On SUB-D 9 pin male connector the following signals are connected: Pin Signal Description 2 RD Datum received by the instrument 3 TD Datum transmitted by the instrument 4 DTR Data terminal ready 5 GND Reference logic mass 7 RTS Transmission request The instrument standard serial transmission parameters are as follows: Baud rate baud Parity None No. bits 8 Stop bit 1 Protocol Xon / Xoff. Data transmission speed may be changed by adjusting the "Baudrate" parameter (PRINT subfunction). Available baud rates are: 38400, 19200, 9600, 4800, 2400, 1200, 300. All other transmission parameters are fixed. DO2003 is equipped with a whole command set and a data request set, to be sent to a PC through a RS232C serial port. All commands transmitted to the instrument must have the following structure: Xycr, where XY stands for the command code and cr stands for Carriage Return (ASCII 0D) Command Response Notes AA DO2003 HVAC Datalogger Type of instrument AG Ver x Rev x B xx Firmware version AH issued day/month/year Firmware date AS Instrument serial number: xxxxxxxx Instrument serial number AZ Full heading To supply information regarding the instrument and connected modules. FA Current date FD Calibration date K1 Print SCREEN K3 Print ALL KS Print ALL single line LD Log dump P0 Character & To check the connection Command Description Notes DAy m d h m It sets the current date (year/month/day) and time (hours and minutes). Insert a blank space between variables. ( DA ) K0 Stop Print K4 Start logging

33 Command Description Notes K5 Stop logging ESC key Stop dump Command characters are exclusively upper case characters; once a correct command is entered, the instrument responds with & ; when any wrong combination of characters is entered, the instrument responds with?. The instrument response string contains Carriage Return/Line- Feed control characters in it

34 STORING AND TRANSFERRING DATA TO A PERSONAL COMPUTER DO2003 datalogger can be connected to a personal computer through a RS232C serial port and exchange data and information through DeltaLog3 software running in a Window operating environment, or through HyperTerminal. DO2003 can send in real time input measured values directly to a PC, through the PRINT function; the instrument can also store in internal memory the values measured by using the Logging function (LOG key); in this case all data stored in memory can be later transferred to a PC. THE LOGGING FUNCTION The Logging function allows recording up to measurements registered by the two input channels. Time interval between two consecutive measurements can be set from one second to one hour. Data stored in memory can be transferred to a PC by using DUMP LOG command: PROG key >> LOG key >> ENTER to confirm. During data transfer phase, the display shows the indication DUP LOG ; to stop and restart the data transfer operation, press LOG key; to stop before the end of the operation, press Log and then ESC. NOTES: Data transfer does not cause erasing of memory; the operation can be repeated as many times as needed. In order to print data to a parallel interface printer, you must use a parallel serial adaptor (not included). MEMORY CLEAR To clear memory, use the Delete Log function (PROG key >> PROBE ZERO key >> ENTER to confirm). The instrument starts clearing the internal memory; at the end of the operation, it goes back to normal display. THE PRINT FUNCTION The PRINT function sends directly to a PC, the measurements taken in real time by the instrument inputs. Print data units of measurements are selected through SET MEA program (Set Measures): see description at page.59. Each printed line shows the acquisition date and hour. Press PRINT key to start the printing function: data transfer continues until the user stops it, by pressing PRINT a second time. NOTE: During serial transmission (PRINT), the keyboard is disabled, except for PRINT and ON/OFF keys. During the logging phase (LOG), also Max-Min-Avg CALL and HOLD keys are active. Both logging (LOG) and direct transmission (PRINT) can be activated at the same time. Should serial transmission be activated while display is on HOLD mode, the transmission takes place normally with actually measured values (that is not in hold mode); only the display freezes at the values taken when HOLD key was pressed. For some commands, the instrument connection with a laptop (PC) is needed; the next chapter illustrates step by step how to connect the instrument to a PC and how to set parameters through the appropriate software

35 HOW TO CONNECT DO2003 TO A PC RUNNING WINDOWS OPERATING SYSTEM The present chapter shows in details how to transfer data from DO2003 to a PC running Windows operating system, using HyperTerminal program; how to connect the instrument to the laptop (PC) and how to set parameters for transmission on your PC and on DO2003. The following instructions are for those who do NOT wish to USE DeltaLog3 software. HARDWARE CONNECTION 1. The instrument must be switched off. 2. Connect the instrument RS232C serial port, to the free serial port (COM1/COM2 port) on your PC through 9CPRS232 Delta Ohm serial cable. 3. Switch the instrument on and set the baud rate to (PROG key >> PRINT key >> set the baud rate by clicking the arrows >> press ENTER to confirm). SOFTWARE CONNECTION TO WINDOWS 95, 98, NT, ME, 2000 AND XP A) After starting WINDOWS select START, PROGRAMS, ACCESSORIES, HyperTerminal. Run HYPERTRM.EXE (double click)

36 B) Communication name: In "Connection description window, digit a name for the connection you need to activate and then choose an icon (for any future connection, you will be able to activate directly the icon chosen for HYPERTRM.EXE, automatically using all settings saved through the program icon). Press OK to confirm. Press CANCEL in the next window

37 C) Communication settings: Select FILE from the HyperTerminal window (one click). Select PROPERTIES from the pull-down menu (one click) and the Properties window will appear. Select the Connect to folder and configure the folder options settings: for the Connect option, choose "directly to COM1" o directly to COM2, depending on the serial port you wish to use for the communication with the measuring instrument

38 Select CONFIGURE (one click) on the Connect to folder, and the Port settings folder will appear. On the Port settings folder choose: BITS PER SECOND: 38400, (See note below) DATA BITS: 8, PARITY: None, STOP BITS: 1, FLOW CONTROL: Xon / Xoff, OK to confirm the port settings (one click). Warning: in order for the communication between DO2003 and your PC to work properly, the Bit per second datum (transmission speed) on HyperTerminal, must be set at the same value as the instrument Baud rate; to transfer data at the maximum speed, we recommend to use the highest baud rate value (38400 baud). When the connecting cable between the instrument and the laptop (PC) is a few meters long, problems regarding data transfer may occur; in this case only, we advise to reduce the baud rate value

39 Still working inside the Properties window: Select the Settings folder. On the Settings folder, select TTY for the Emulation folder option Set Backscroll Buffer at 500 OK to confirm the configured Options (one click)

40 D) To set the correct type of character: In HyperTerminal window, select DISPLAY (one click). Select CHARACTER (one click) from the pull-down menu, and the character selection window will appear; configure: Terminal. Select Style: Normal Select character Size: 9 or 11 OK to confirm (one click)

41 E) To store data received from an instrument: Select TRANSFER (one click) from the HyperTerminal window. Select CAPTURE TEXT (one click) from the pull-down menu, and on the appeared window select the file where all data received from the instrument will be stored. Type the name of the file where received data will be stored. Select START to configure the name of the receiving file (one click)

42 F) To receive data from the instrument: Select CALL (one click) from the HyperTerminal window. Select CONNECT (or CALL, depending on the operating system in use) from the pull-down menu. In this way, you will be able to receive on the computer display the data received from the instrument. At this point, HyperTerminal software is able to receive data from the measuring instrument, and to store them in the configured file. G) Switch the measuring instrument on. When the instrument has completed the switching-on routine, press PRINT key >> ENTER key to start the immediate data transfer (at the set rate). In order to start unloading internal memory data, use the LOG key Dump Log subfunction (PROG key >> LOG key>> ENTER)

43 H) To end receiving data from an instrument: Select TRANSFER (one click) from the Hyper Terminal window. Select CAPTURE TEXT (one click) from the pull-down menu. Select END (one click) from the pull-down submenu. At this point the data receiving operation has ended and the file stored in the computer can be edited by using a text editor program (NotePad, WordPad, ) or Excel. I) To quit HyperTerminal: Select FILE (one click) from the HyperTerminal window. Select QUIT from the pull-down menu (one click). Select YES (one click) if you need to save the communication settings