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

16. Troubleshooting16.1 General ErrorsError Message Possible Causes RemedyFactory CalibrationData FailureTemperature Readingsmay be InaccurateEEPROM Write FailureReturn to Factory forServiceLogged Data pointerfailureAll Logged Data LostThe EEPROM chip whichcontains the factory calibrationinformation has failed.User calibration settings havebeen lost or corrupted.1. Memory back-up battery haslost its charge to lack of useof the instrument.2. Memory back-up battery isfaulty.The unit must be returned to TPS forservice.• Temperature readings may be up to 10%incorrect.• Conductivity, TDS, Resistivity and Ratioreadings will be accurate if calibrated inthe same range as measurements.Switch the meter OFF and switch back ON.If the problem persists, return the unit toTPS for service.Recharge the memory back-up battery byswitching the meter on for approx. 16 hours(this does not need to be continuous).Return the instrument to the factory to havea new rechargeable battery fitted.4316.2 Conductivity, TDS, and Resistivity TroubleshootingSymptom Possible Causes RemedyUnit fails to calibrate, evenwith new probe.Unit attempts Spancalibration instead of Zerocalibration.Standard calibration fails,and k factor is greater than25% above the nominalvalue.Standard calibration fails,and k factor is less than75% below the nominalvalue.Continued over the page…Calibration settings outside ofallowable limits due to previousfailed calibration.Sensor has Zero error.1. Sensor is not immersedcorrectly.3. Sensor may have a build-upof dirt or oily material onelectrode plates.4. Platinum-black coating hasworn off.5. Standard solution isinaccurate.6. Sensor is faulty.7. Faulty instrument.8. k-factor incorrectly set ifusing non-TPS sensor.1. Standard solution isinaccurate.2. Sensor may have a build-upof conductive material, suchas salt.3. Sensor is faulty.4. Faulty instrument.5. k-factor incorrectly set ifusing user-selectable k factorsensor.Initialize the unit. See section 14.Thoroughly rinse sensor in distilled waterand allow to completely dry in air beforeattempting zero calibration.If instrument does not calibrate at Zero withsensor disconnected, then the instrument isfaulty.Immerse sensor correctly, with adequateclearance to the floor and walls of thevessel, as per section 17.2.Clean sensor, as per the instructionsdetailed in section 17.3.Sensor requires replatinization, as persection 17.5. Alternatively, return to thefactory for replatinization.Replace standard solution.Return sensor to factory for repair orreplacement.Return to factory for repair.Set the correct k-factor, as per sections 3.7,4.7, and 5.6.Replace standard solution.Clean sensor, as per the instructionsdetailed in section 17.3.Return sensor to factory for repair orreplacement.Return to factory for repair.Set the correct k-factor, as per sections 3.7,4.7, and 5.6.