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4-9

ALARMS

The faulty sensor will cause the instrument to display a

ashing spanner symbol to warn the user that this sensor is

not working correctly, as shown in Fig. 4-7:

Fig. 4-7 Zero Fault

4.5.3 Sensor Fault

Note: The PS200 instrument features continual toxic sensor

integrity detection. This may generate a sensor fault

indicated by a red illuminated backlight, audible

beeping and ashing red LED’s. Unlike zero fault,

it would only occur immediately after switch-on and

occasionally during operation. If this fault occurs, allow

instrument to run in fresh air for up to 20 minutes. If

fault does not clear, return instrument to an approved

Service / Repair facility.

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.

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GMI PS241 Specifications

General