The Gas Analyzer - ADInstruments

Power indicator fails to light
The Gas Analyzer is off or the power is switched off at the wall, the power
cable is not connected firmly, or a fuse is blown.
••
Physically check switches and power connections.
••
Check that the power cable is firmly connected at the back of the Gas
Analyzer.
If the internal fuses are suspected of having blown, the unit should be
returned to your ADInstruments distributor for servicing.
Drift in the Output Signal
Positive Drift: Contamination build up in the sample chambers of the
transducers will cause a positive drift proportional to the build up. Return
the unit for cleaning or transducer replacement.
Cyclic Drift: Cyclic drift is directly related to temperature variations.
No or Noisy Output
Erratic or noisy output: Excessive bench temperature fluctuations lead to
noisy or erratic drift in the transducers. Place a shroud over the benchtop to
reduce fluctuations. Check power supply for ripples.
No output response or no output at situation: The sample cell is filled with
condensate or there is a malfunction of the detector. Return the unit for
cleaning or transducer replacement.
Output extremely erratic: Operating temperature outside specification.
Impeded sample airflow
The bacterial filter may become clogged under high humidity conditions.
Replace the bacterial filter.
The exhaust port may be blocked or airflow impeded. Ensure the port is not
restricted and is clear of obstructions.
No response to changes in sample concentration
Check that the pump is turned on.
28 Gas Analyzer Owner’s Guide