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USER HANDBOOK
Alternating with
Fig. 3.7 CO2 Sensor - Zero Fault
3.4.4 Sensor Fault
There are three types of sensor fault:
1. If a “ZERO FAULT” message and a ashing spanner
symbol appear, alternating with an LEL gas value as
shown in Fig. 3.8, leave instrument on for 30 to 60
minutes in clean air, monitoring the reading, then switch
instrument Off and On again.
Alternating with
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