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USER HANDBOOK
4.5.3 Sensor Fault
Note: The PS200 instrument features continual sensor
integrity detection. This may generate a sensor fault
during operation
There are three types of sensor fault as illustrated in the
following displays:
1) If a “SENSOR FAULT” warning and a spanner symbol
appears adjacent to a gas type, as illustrated in Fig. 4-8, then
the sensor requires replacement or an electrical fault exists.
Return instrument to an approved Service / Repair facility.
Fig. 4-8 Sensor Fault
2) If a “ZERO FAULT” warning and a flashing spanner
symbol appear, alternating with a zero LEL reading as
illustrated in Fig. 4-9, apply test gas for two minutes to allow
the display to return to zero then switch instrument OFF and
ON again. If fault remains, return instrument to a GMI
approved Service / Repair facility.
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