GMI Personal Surveyor 200, User Handbook Manual

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4-10
USER HANDBOOK
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.
Fig. 4-9 Check Fault
3. If a “ZERO FAULT” warning and a flashing spanner symbol
appear, alternating with an LEL gas value as shown in
Fig. 4-10, leave instrument on for 30 to 60 minutes then
switch instrument OFF and ON again. If fault remains,
return instrument to a GMI approved Service / Repair
facility.