GPR-2600 Series Oxygen Analyzer - Advanced Instruments Inc.

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Advanced Instruments Inc.Symptom Possible Cause Recommended ActionErratic O 2 readingorNo O 2 readingChange in sample pressureDirty electrical contacts in upper section ofsensor housingCorroded solder joints on sensor PCB fromcorrosive sample or electrolyte leakage fromsensorCorroded spring loaded contact in uppersection of sensor housing from liquid insample or electrolyte leakage from sensorLiquid covering sensing areaImproper sensor selectionPresence of interference gasesUnauthorized maintenanceSensor nearing end of lifeSensors without PCB use mV setting.Calibrate the analyzer (calibrate at pressure andtemperature of sample)Clean contacts with alcohol (minimize exposure timeof MS sensor to ambient air to extent possible)Replace sensor and return sensor to the factory forwarranty determinationUpper section of sensor housing: Clean contactswith alcohol, flow sample or zero gas for 2-3 hoursto flush sample system and sensor housingSensor: Replace if leaking and return it to thefactory for warranty determinationWipe with alcohol and lint free towel or flow sampleor zero gas for 2-3 hours to flushReplace GPR/PSR sensor with XLT sensor when CO 2or acid gases are present. Consult factory.Replace sensor and install scrubberConsult factory.Replace sensorErratic O 2 readingorNegative O 2 readingorNo O 2 readingaccompanied byelectrolyte leakagePressurizing the sensor by flowing gas to thesensor with the vent restricted or SHUT OFFvalve closed and suddenly removing therestriction draws a vacuum on the sensororpartially opening the valves upstream of theanalyzer when using a pump downstream ofthe analyzer to draw sample from a process atatmospheric pressure or a slight vacuum.Placing a vacuum on the sensor in excess 4”of water column is strongly discouraged.A premature adjustment of the ZERO OFFSETpotentiometer is a common problemZero the analyzer. If not successful replace thesensorAvoid drawing a vacuum on the sensor, apressurized sensor may not leak but still producenegative readings.From MAIN MENU select DEFAULT ZERO48
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GPR-2600 Series Oxygen Analyzer - Advanced Instruments Inc.

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