900-C Conductivity, TDS, Resistivity, Ratio, Meter - TPS

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245.7 Resistivity CalibrationBefore attempting a Resistivity calibration, ensure that the 900-C has been set up correctly,according to sections 5.1 to 5.6. The calibration procedure detailed below uses the sampleconfigurations shown in sections 5.1 to 5.6.Also ensure that Temperature has been correctly calibrated (see section 7.1). A “ ∗ ” in theTemperature readout in place of the decimal point indicates that Temperature is NOT calibrated.1. Plug the Resistivity sensor into the CELL socket and the temperature sensor into the TEMPsocket. (The separate temperature sensor is not required for combinationResistivity/Temperature sensors.)2. Rinse the Resistivity and temperature sensors in distilled water. Shake off as much water aspossible. Blot the outside of the sensor dry. DO NOT BLOT THE ELECTRODE PLATES.Air Calibration3. Let the sensor dry in air.4. Select Resistivity Calibration ( → F1:Calibrate → F1:Resistivity).5. The 900-C will recognise the Over-range resistivity signal and attempt an Air calibration. Forexample…Over-range k=1*00 25.0 O cPress Enter to Zero probe or Menu Exit.6. When the reading has stabilised at the Over-range reading, press to calibrate or toquit. The ∗ will not be removed after an Air calibration.Standard Calibration7. Place the Resistivity sensor into a sample of Resistivity standard, so that it is immersedcorrectly, with adequate clearance to the floor and walls of the vessel. See section 17.2 fordetails of correct sensor immersion.DO NOT place the sensor directly into the bottle of standard. Discard the used sample ofstandard after use.Select Resistivity Calibration ( → F1:Calibrate → F1:Resistivity). Thecalibration screen will be displayed, with the Resistivity standard to be used. For example…362* Ω.cm k=1*00 25.0 O cPress Enter to Calibrate. STD=362.3Ω.cm.cm8. When the reading has stabilised, press to calibrate. The ∗ will now be replaced by adecimal point, if calibration was successful.9. The 900-C is now calibrated for Resistivity and is ready for use in this mode.
5.8 Resistivity Calibration Notes1. An Air calibration should be performed at least monthly. In high resistivity applications (wherea zero error is particularly significant) an Air calibration may have to be done weekly.2. A Standard calibration should be performed at least weekly. Of course, more frequentcalibration will result in greater confidence in results.3. Conductivity, TDS, Resistivity and Ratio calibration data is stored separately in memory.Ensure that the 900-C has been correctly calibrated for the mode in which it will be used. The900-C does not require re-calibration when alternating between Conductivity, TDS, Resistivityand Ratio modes, providing the instrument has been correctly calibrated for each mode.4. All calibration information is retained in memory when the 900-C is switched off, even whenthe power supply is unplugged. This information can be recalled or printed later using the GLPfunction (see section 8).5. The 900-C displays the value of the standard to which it will attempt to calibrate. Ensure thatthe standard value displayed corresponds to the standard that you are using. Alter the Standardsset-up if necessary (see section 5.2).5.9 Resistivity Calibration Messages1. If an Air Calibration has been successfully performed, the 900-C will display the followingmessage…Zero ok252. If a Standard Calibration has been successfully performed, the 900-C will display the followingmessage, and the calculated k factor of the sensor. For example…Calibration ok. Calculated k=1.083. If a Standard Calibration has failed, the 900-C will display the following message, and thecalculated k factor of the sensor. For example…NotesCalibrate Failure. Check STD=362.3Ω.cm.cmCalc. K=3.64, Exceeds Limit.1. The allowable k factor range is +/-25% of nominal. This range is ample to allow for correctlyfunctioning Resistivity sensors. If calibration fails due to the k factor being outside these limits,then please consult the Troubleshooting guide (section 16.2) for possible remedies.
Page 5 and 6: 1.3 Menu and Function KeysPress the
Page 7 and 8: 71.9 SpecificationsRangesMode k=0.1
Page 9 and 10: 2. 900-C Menu StructureA detailed b
Page 11 and 12: 3. Conductivity Mode3.1 Selecting C
Page 13 and 14: 3.7 Setting the Conductivity sensor
Page 15 and 16: 3.9 Conductivity Calibration Notes1
Page 17 and 18: 4.5 Setting the ATC Slope for unkno
Page 19 and 20: 4.8 TDS CalibrationBefore attemptin
Page 21 and 22: 5. Resistivity Mode5.1 Selecting Re
Page 23: 5.6 Setting the Resistivity sensor
Page 27: 7. When the reading has stabilised,
Page 30 and 31: 308.2 Failed CalibrationIf calibrat
Page 32 and 33: 329. Notepad Function9.1 Recording
Page 34 and 35: 3410. Automatic DataloggingThe 900-
Page 36 and 37: 3611. RS232 PortThis section is app
Page 38 and 39: 3811.6 Data FormatData is returned
Page 40 and 41: 4012. Recorder PortThis section is
Page 42 and 43: 4214. Initialising the 900-CIf the
Page 44 and 45: 44Conductivity, TDS and Resistivity
Page 46 and 47: 4617. Appendices17.1 Selecting Auto
Page 48 and 49: 48Notes1. If a Conductivity sensor
Page 50 and 51: 5017.4 Care, Cleaning and Maintenan
Page 52 and 53: 5217.6 Replatinizing Conductivity S
Page 54: 5418. WarrantyTPS Pty. Ltd. guarant

900-C Conductivity, TDS, Resistivity, Ratio, Meter - TPS

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