Microprocessor Benchtop Conductivity/ Resistivity Meter SC-2300 Operation Manual 1
Content Table 1. Specifications 1 2. Configuration 2.1 Display 2 2.2 Socket 2 2.3 Keypad 3 3. Operation 3.1 Measurement 4 3.2 Measurement function and file bit shift 4 3.3 Temperature function and compensation 5 3.4 Auto Read 5 4. Settings Block diagram of settings 6 4.1 Parameter settings 7 4.1.1 Entry of set-up 7 4.1.2 Settings of 7 4.1.3 Settings of data deletion 7 4.1.4 Settings of baud rate (BAUD) 8 4.1.5 Settings of system time 9 4.2 Deletion of all stored data 10 4.3 System reset 10 Block diagram of calibration and temperature compensation settings 11 4.4 Settings of calibration parameter 12 4.4.1Electrode coefficient and calibration parameter 12 4.4.2 Standard solution calibration parameter 13 4.4.3 Temperature compensation coefficient 13 Block diagram of operations in 14 4.5 Auto/manual data storage 15 4.5.1 Auto storage 15 4.5.2 Manual storage 15 4.5.3 Data full 15 4.6 Data readout and output 16 4.6.1 Auto transmission 16 4.6.2 Manual readout and transmission 16 5. Calibration Block diagram of Calibration 20 5.1 Standard solution preparation 21 5.2 Calibration 21 5.3 Entry of calibration 21 2
5.3.1 Electrode coefficient calibration 21 5.3.2 Standard solution single-point calibration 21 5.3.3 Standard solution five-point calibration 22 5.3.4 Error message 22 6. Instruction set for RS232 23 7. Alternative fittings 23 8. Failure recovery 24 9. Maintenance 24 3
1. Specifications Model SC-2300 Function µs/ms/mω/salt/tds/temp Cond. 0.00 us/cm ~ 200.0 ms/cm in 5 measuring ranges for manual or auto switch Res. 0.00~100.00 MΩ- cm Range Salt 0.0~70.0ppt TDS 0~2000ppm TEMP -10.0+110.0 C Cond. 0.01µS/cm Res. 0.01 MΩ-cm Resolution Salt 0.1 ppt TDS 1 ppm TEMP 0.1 C Cond. 0.5%(±1Digit) Res. 1%(±1Digit) Accuracy Salt 0.5%(±1Digit) TDS 0.5%(±1Digit) TEMP ±0.2 C(±1Digit) Temperature PT-1000 or NTC 30K auto recognition Compensation Auto / Manual selectable Temperature Non-linear / 0.00~20.00% Linear Coefficient Ref. Temperature T ref 25 Manual calibration Single point known standard solution or electrode constant calibration Standard solution calibration Single or up to 5-point known standard solution calibration; default five standard solution 10/84/1413 us/cm & 12.88/100 ms/cm adjustable RS232 interface YES Output Data logging 450 sets (measuring value, temp., date, time & ID) Ambient temperature 0~50 C Storage Temperature -20~+70 C Display 3/4 LCD / backlit Power 4 x AA / AC ADAPTOR Battery Around 100 500hrs according to measuring range and whether the backlit is used Protection Type IP43 Dimension (L x W x H) 220 x 190 x 70mm Weight 0.8kg 1
2. Configuration 2.1: Display: Set-up Measurement Read Measurement unit Auto Auto temperature compensation Calibration Time reminder Data storage Data transferring speed Low battery reminder Storage ID Data reading /Transferring 2.2 Socket: Data Storage ID POWER : DC 6V Adaptor socket RS-232 : RS-232 output socket REC. : no function at the moment T/P : External temperature probe socket (prohibited if using electrode which has combined with temperature sensor). EC/DO : Resistivity or Conductivity electrode waterproof socket 2
2.3 Keypad: : Power switch Push it to power on and push it again to power off : Cond./Res./Salt/TDS shift key; pushing it at any time to back to : Enter calibration : Auto read Push one time for startup and push again for cancellation. : Upward or leftward key : Downward or rightward key : (ENTER) confirmation, execution, and confirmation for RS-232 manual output : (Recall) Data recall key and value selection key : (Store) Data storage key + : Enter system parameter setup, see ch.4.1 + : Delete all stored data, see ch.4.2 + : System reset, seech.4.3 + : Shift among five manual ranges and the auto range recognition, see ch.3.1 + : Enter calibration parameter settings, see ch.4.4 + : Enter auto continual storage settings, see ch.4.5 + : Enter auto continuation data transmission settings, see ch.4.6 3
3. Operation 3.1 Measurement: Push key to power on the instrument. It will automatically show last and be ready for new. 3.2 Measurement function shifting: 1. PushMODE to shift among Cond., Salt, and TDS in Cond. Mode. This function is unavailable in Res.. 2. PushENT+MODE to shift among five manual ranges(20.00µs /200.0µS /2000µS /20.00 ms /200.0 ms) and auto range shifting. When entering into auto range shifting, symbol will disappear after 3 seconds. Push Pushto shift to Salt Push Push to adjust the salt value. Note: Factor range is 0.4~1.5 Pushto shift TDS Push Push to adjust Total Dissolved Solids. Note: Factor range is 0.4~1.5 Push Push Push Push Remark: Before measuring salt and TDS, please finish the calibration according to the conductivity calibration steps, and then set the factor value according to the standard solution of salt and TDS. 4
3.3 Temperature and compensation: 1. Auto Temp. Compensation: Auto recognition of temperature probe system. (NTC30K or PT1000) Push or to adjust the temperature within in ±5. Push keys simultaneouslyto back to the original value. 2. Manual Temp. Compensation: Enter MTC 25 automatically if no temperature probe. Push or to adjust the temperature. Push simultaneously to back to the default value. 3. Temperature compensation: The temperature of the to-be-tested solution may not be 25. For standardization, the conductivity value of the solution which is not at the temperature of 25 will be calculated to that of solution at the temperature of 25. 4. According to the temperature coefficient required by the, three kinds of temperature compensation can be applied: Linear(Lin), Non-linear(nLin), and non compensation (0.00). See the setting method in ch. 4.4.3. Users can set by themselves as needed. 5. Temp. Coefficient (TC for abbreviation), the conductivity value of the solution will increase as the temperature rises. TC may differ from different solution. See the formula as follows: C 25 Conductivity at 25 Formula 1: Ct = C Ct 25 { 1+β( T 25 ) } Conductivity at T T Temp. of the tested solution Formula 2: β = ( CtC β Temp. Coefficient 25 ) / { C 25 ( T25 )} 6. How to measure the TC of the solution: If the user wants to get a more accurate value, the above formula can be applied to measure the TC of the solution and set an appropriate TC on the machine. Take 0.01N KCl as an instance, set the TC as non compensation (0.00%) in the machine. Control the same solution respectively at 25 and 20. You could acquire at 25(C 25 ) for 1413µS; and the at 20(C) for 1278µS According to formula 2, β1.91%. 3.4 Auto Read: In the, push AUTO to start and push ENT to measure. Then, push ENTto make the next. PushAUTOor MODE at any time will allow backing to the (See the following charts). The symbol twinkles for about 10 seconds to get a stable value. PushAUTO The symbol stop twinkling and a value will appear after the is stable. PushENT 1. PushENTfor the next 2. Push AUTOorMODE Back to the 5
4. Settings Block diagram of settings PushMODE+, Release + MODE to enter Settings of Power off Data overwriting settings Baud rate settings System time settings PushSTO+, Push+, Release + STO Release + to deleteallstored data for system reset (Data Clean) (RS 232) Pushor to select conductivity or specific resistivity Push or to select auto overwriting or cancel overwriting Pushor to select other transmission speed: 1200, 2400, 4800 or 9600 Push or to modify the year Push or to modify the month Push or to modify the day : ENTER key Push or to modify the hour Push or to modify the minute 6 6
4.1 Parameter settings: 4.1.1 Entry of set-up : In the power-off status, push MODEfirst and then push to power on the machine; then please release first and then MODEto enter the parameter setting. Use or to select. 4.1.2 Settings of : Push ENTto enter Push or to select MΩ-cmµS/cm PushENTto confirm it Enter Settings of data deletion 4.1.3 Settings of data deletion: Enter Settings of data deletion PushENTto enter Push or to select auto overcast or cancel auto overcast PushENTto confirm it Enter Settings of baud rate 7
4.1.4 Settings of baud rate (BAUD): Enter Settings of RS-232 baud rate PushENTto enter Push or Push or to select to select Push to select or PushENTto confirm it Enter Settings of system 8
4.1.5 Settings of system time: Enter Settings of system time PushENTto enter Push or to modify the year, then pushentto confirm it Push or to modify the month, then pushentto confirm it Push or to modify the date, then pushentto ensure Push or to modify the hour, then pushentto confirm it Push or to modify the minute, then push ENTto confirm it Back to Setting of mod, or push MODEto back to 9 7
4.2 Deletion of all stored data: In the power-on status, pushstofirst andthen ; after that release first and then releasestoto enter the data deletion. (Data Clean) PushENTto confirm to delete all stored data or push MODEto back to the Back to the 4.3 System reset: In the power-off status, pushcalfirst and then ; after that, release then releasecalto enter the system reset page. first and (Initial Setting) PushENTto confirm the system reset; or pushmode to back to the Back to the Factory defaults: Data deletion settings: Auto (BAUD) settings: 4800 Data transmission settings: read the stored data on the display (Sto disp) 10 8
Block diagram of calibration and temperature compensation settings Settings in conductivity Settings in specific resistivity Power on Calibration and temperature compensation settings. Push ENT+CAL Power on PushENT+CAL Electrode coefficient calibration settings Standard solution calibration settings Measurement temperature coefficient settings Measurement temperature settings Push to adjust compensation coefficient Push to adjust compensation coefficient Push to adjust compensation coefficient Measurement Measurement ENTER key 10 11
4.4 Settings of calibration parameter: In the power-on status, pushentfirst and thenpushcalto enter set-up of calibration parameter. Use to select. 4.4.1 Electrode coefficient and calibration parameter: Electrode coefficient and calibration parameter PushENTto enter the settings of calibration temperature compensation coefficient = PushENTto confirm Push to select or Push or to select PushENTto confirm it Push or to set the temperature PushENTto confirm it Back to 12
4.4.2 Standard solution calibration parameter: (Only suitable when the unit is conductivity) PushENTto confirm it Push or to select PushENTto confirm it Back to 4.4.3 Temperature compensation coefficient: PushENTto confirm it Push to select or Push or to select PushENTto confirm it Push or to set the coefficient value PushENTto confirm it Back to 13
Block diagram of operations in Power on Auto store Push ENT+STO Storage Manual store pushsto Data store full Transmission Auto transmission PushENT+RCL Manual read and transmission PushRCLto shift circularly among 4 s The stored data is transmitted to the display The stored data is transmitted through RS232 The calibrated data is transmitted to the display The stored data is transmitted through RS232 Appear the original ID Push or to set the ID number Appear the original ID Push or to set the ID number Back to the In case of data full unable to store, will twinkle for 5 seconds Back to the If twinkles, Push or to set the minute Push or to set the second Appear recently stored data Push or to modify the inquiry site After transmission, back to the automatically CELL direct calibration Std simple point calibration Std five point calibration After transmission, back to the Push or to set the minute Push or to set the second If twinkles, it means that the data is stored Continual and data it means that the data is stored Continual transmission PushENT+RCL Cancel continual storage Read the ID, and push or to inquire other data through ID Read the stored year Read the stored date Back to the Back to the PushENT+STOto close Cancel continual storage Read the stored time Back to the Back to the ENTER key 14 14
4.5 Auto/manual data storage: 4.5.1 Auto storage: In the, pushent first and then pushstoto enter the auto continual storage set-up. 4.5.2 Manual storage: In the, pushsto to enter manual store page. Appear the original ID. Push ENTto confirm it PushENTto confirm it Push or to set ID number; PushENTto confirm it and enter settings of automatic storage time. Push or to set the minute, and push for confirmation and settings of second Pus or to set ID number; Push ENTto confirm the storage Back to the 4.5.3 Data full: When the data full storage, the display will twinkle as a reminder, and five seconds later, it will back to the original. Push or to set the seconds, and push for confirmation. (The minimum value is 5 seconds) If twinkles, it means that the data is stored According to step 4.2, delete all the data. If under auto overwriting, there is no reminder of data full. PushENTSTOto cancel the auto store Back to 15
4.6 Data readout and output: 4.6.1 Auto transmission: In the, pushent first and then pushrclto enter auto transmission. 4.6.2 Manual readout and transmission: In the, pushrclto shift among 4 s circularly, and pushent to enter. PushENTto enter, and the recently stored data will appear Push or to set the minute, and pushentfor confirmation and enter the second setting. Push or to modify the inquiry site. Push Enter to confirm it Push or to set the seconds, and pushentfor confirmation. (The minimum value is 5 seconds) If twinkles, it means that Read the ID and push to inquire other data according to the ID. Push enter to read the data value and data storage year. the data is stored PushENTRCLto cancel the auto store Back to PushENTto read the data storage date PushENTto read the stored time Push ENTto read the temperature value of the data PushENT Back to 16
B. Transmit the stored data through RS-232 Transmit all stored data through RS-232 C. Read the calibrated data on the display C.1 Read the calibrated data on the display PushENTto transmit After the transmission, back to PushENT, and it will show the standard solution value and electrode coefficient PushENT, and it will show the calibrated temperature compensation coefficient value PushENT, and it will show the calibration record year PushENT,and it will show the calibration record date PushENTand it will show and the calibration record time PushENT Back to 17
C.2 Read simple-point calibration data of standard solution (when the calibration parameter is set as Std 1P calibration). PushENTto enter, and the data and electrode coefficient of standard solution appear PushENTand the calibration record year appears PushENT, and the calibration record date appears PushENTand the calibration record time appears PushENT Back to 18
C.3 Read five-point calibration data of standard solution (when the calibration parameter is set as Std 5P calibration). PushENTand the calibration record date appears PushENTand the calibration record time PushENT, show the calibration value of Buffer 1. If there is no data, it will show NULL. PushENT PushENT, show the calibration value of Buffer 2. If there is no data, it will show NULL. Back to PushENT, show the calibration value of Buffer 3. If there is no data, it will show NULL. D. Transmit the stored data through RS-232 Transmit all stored data through RS-232 PushENT, show the calibration value of Buffer 4. If there is no data, it will show NULL. PushENTto transmit PushENT, show the calibration value of Buffer 5. If there is no data, it will show NULL. After the transmission, back to PushENTand the calibration record year appears 19
5. Calibration Block diagram of Calibration PushCAL Power on Conductivity Use keys to select known standard solution value Specific resistivity Back to Use keys to select suitable coefficient C=.0100 C=0.100 C=0.475 C=10.00 Coefficient valve shinesuse keys to adjust coefficient value Back to Use keys to select standard solution value, including: 10.00uS/cm, 84.0uS/cm, 1413uS/cm, 12.88mS/cm, 100.0 ms/cm five default values The instrument is reading coefficient PushMODE Back to PushMODE Back to Use keys to select known standard solution value The instrument is reading coefficient Use keys to select known standard solution value The instrument is reading coefficient PushMODE The instrument is reading coefficient Use keys to select known standard solution value PushMODE The instrument is reading coefficient Back to Back to Back to Use keys to select suitable coefficient C=.0100 C=0.100 Coefficient valve shinesuse keys to adjust coefficient value to the known standard solution value PushMODE Use keys to select known standard solution value Back to The instrument is reading coefficient ENTER key 20
5.1 Standard solution preparation: Put reagent KCl in an oven of 150180 for 5 hours, and then put it in a dry container until it cools down to the ambient temperature. Dissolve 0.7456 g KCl powder into 1 kilolitre pure water to be 0.01N KCl standard solution (1413µS/cm). 5.2 Calibration : Measured functions Calibration method Preset temperature compensation method Set CELL CONSTANT Linear(Lin) 2.00 adjustable Std 1P Prepare 5 selectable kinds of According to standard solution default Conductivity Buffer Std 5P Prepare 5 selectable kinds of According to standard solution default Buffer Special resistivity Set CELL CONSTANT Non-Linear(nLin) 5.3 Entry of calibration : Temperature coefficient produces a great influence on of conductivity, so it is suggested to control the temperature of standard solution within 25±3 during the calibration. 5.3.1 Electrode coefficient calibration: 1. When the calibration parameter is set as electrode coefficient setting (see 4.4), pushcalto enter the electrode coefficient setting page, and then pushentto enter the next page. 2. Push or to select electrode coefficient default 10.00, 0.475, 0.100 or 0.0100 (resistivity only includes 0.100 and 0.0100), in order to select a suitable electrode coefficient value. After selecting the suitable default, pushentto enter the next page. 3. Then, the electrode coefficient value on display begins to twinkle. Push or to adjust the electrode coefficient value until equal to the buffer s standard. Then, pushentto back to the. 5.3.2 Standard solution single-point calibration: 1. When the calibration parameter is set as single-point calibration (see 4.4), pushcalto enter Standard solution single-point calibration, and then pushentto enter the calibration solution selection page. 2. The display will show the first preset buffer s standard value and temperature value. Push or to modify the standard value, including five default values 10.00µS, 84.0µS, 1413µS, 12.88mS and 100.0mS. After selecting the suitable default, pushentto enter the next page. 3. The symbol begins to twinkle, indicating that the instrument begins auto calibration. After the calibration, the display shows the calibrated electrode coefficient automatically. 4. After the calibration, the display shows the calibrated electrode coefficient automatically. PushENTto back to the. 21
5.3.3 Standard solution five-point calibration: 1. When the calibration parameter is set as five-point calibration (see 4.4), pushcalto enter Standard solution five-point calibration, and then pushentto enter the first CAL1 page. PushMODE at any time will allow you intermit the calibration and back to the. 2. Push or to select calibration point CAL1~5. Their default values are respectively 10.00µS, 84.0µS, 1413µS, 12.88mS and 100.0mS. You can select any calibration point to make single-point, two-point, three-point, four-point, and five-point calibration. Clean and dry the electrode, and then put it into the buffer solution. Push ENTto enter the calibration page. 3. The symbol begins to twinkle, indicating that the instrument begins auto calibration. After the calibration, the display shows the calibrated electrode coefficient automatically. 4. After the calibration, the display shows the calibrated electrode coefficient automatically. 5. PushENTto enter the second calibration (CAL2) and finish the first point calibration. PushMODEto store the calibration data and the system will exit calibration and back to. 6. Other CAL2~CAL5 calibration applies the same steps as CAL1. Feature: The design of this instrument is free of the calibration sequence, so after finishing any point calibration, you can pushentto enter the next point calibration, and pushmodeto store the calibration data. Then, exit the calibration and back to the to finish the calibration of any one or a few points. 5.3.4 Error messages: When the display shows error messages of failure calibration, please refer to chapter 8 Failure Recovery to remove the errors and restart the calibration. 22
6. Instruction set for RS232 The communication between the instrument and the Windows Hyper Terminal is set as follows: 1. Click Starton the lower left, and select All Programs Accessories Communication Hyper Terminal, and the display will show a window of Hyper Terminal. 2. Set icon and online name for Hyper Terminal before entering the ONLINE window. 3. Select communication terminal (for example, select connect COM1) in Use online (N):in ONLINE window, and then enter the window COM1 content. 4. In transmission bit per second (B):in COM1 content, select baud rate=9600 (It should be consistent with controller settings), data bit (D)=8, parity check(p)=none, stop bit (S)= 1, flow control (E) =none. 5. Click disconnet 6. Click filecontent, and enter the window XXX content. 7. Click setting valueascii settingto enter ASCII setting window. 8. In ASCII setting window, select newline at the end of each line (S),Respond to the input characters (E),Add LF at the end of each input line (A) and newline if exceeding the width of terminal (W), and then leave ASCII setting window by pushing confirm. 9. Push confirmto leave XXX content window. 10. Push callto link the communication. 7. Alternative fittings Calibration solution types and description Order number Conductivity electrode C 0.475 8-243 Special resistivity electrode C 0.01 8-221-01 Special resistivity electrode C 0.05 8-222-01 Flow cell 8-TF-02 10 µs KCl Calibration Solution in 16-oz(about 473ml) glass bottle 00652-24 84 µs KCl Calibration Solution in 500-ml leak-proof bottle 00653-16 1,413 µs KCl Calibration Solution in 500-ml leak-proof bottle 00653-18 12,880µS KCl Calibration Solution in 500-ml leak-proof bottle 00606-10 100,000S KCl Calibration Solution in 16-oz(about 473ml) glass bottle 00652-34 23
8. Failure recovery Failure phenomenon Possible causes Disposition ERR1 The electrode coefficient has a too large deviation when using the standard solution to calibrate. Replace new standard solution for another calibration. For others, please refer to the disposition of deviation in the ERR2 Measurement deviation The is unstable when using the standard solution in calibration. The electrode is contaminated. The electrode coefficient (C) is wrongly set. The temperature coefficient (TC) is wrongly set. The electrode is damaged or broken-down. There are air bubbles around the electrode. Instrument fault The electrode is influenced by air bubbles. The electrode is polluted. Electrode fault. Instrument fault. The electrode plugs is not inserted into the required place. following. Please refer to the disposition of unstable in the following. Clean the electrode. Modify the electrode coefficient. Modify the temperature compensation. coefficient. Readjust the coefficient. Stir the sample with the electrode to remove bubbles. Send to the original factory for repair Unstable Stir the sample with the electrode to remove bubbles. Clean the electrode. Replace the electrode. Send to the original factory for repair. The conductivity value is Check the electrode plugs and reinsert it into zero or the special resistivity the required place. value is out of the range. The electrode is broken. Replace the electrode. Temperature deviation Not soak in the sample deeply enough. Deepen the soaked length to ensure the accuracy of temperature. Deviation of standard comparison. Use standard thermometer comparison to correct the difference in temperature. The temperature sensor is broken. Replace the electrode. Instrument fault. Send it back to the local distributor for repair. Temperature is wrongly The electrode plugs is not inserted into Check the electrode plugs and reinsert it into displayed. the required place. the required place. The temperature sensor is broken. Replace the electrode. Instrument fault Send it back to the local distributor for repair. 9. Maintenance 9.1 Maintenance of instrument: Please keep it in dry and ventilated environment. Use slightly wet soft cloth to wipe the instrument s surface. For pollution by grease, please remove the stain with waxed soft cloth. Solvent is strictly prohibited. 9.2 Battery replacement: a. When the display showslobat during the instrument works, please replace with alkali dry cells. b. Please power off the instrument before open the battery cover. c. Take out the old battery and put in 4 new AA batteries in correct directions. Reinstall the battery cover to finish the battery replacement. d. Caution! The battery replacement should be finished within 20 seconds; otherwise the date data will disappear and should be reset. 9.3 Maintenance of electrode: The substances on the measuring side of electrode will influence the value and cause deviation. Please clean and maintain it regularly. Use soft brush or cotton stick to clean the graphite surface of electrode. Pollution types Cleaning methods Pollution by grease Use mild degreasing agent to clean the electrode. Pollution by dirt Soak in 2~5% HCl for about 5 minutes. 24
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