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GT-FIRE
PORTABLE GAS DETECTOR
3. Service Due enabled - if overdue, message is displayed as shown in
Date, but after five seconds, the monitor warm-up continues automatically.
4. Service Due enabled - if overdue, user acknowledge is required.
5. Service Due enabled - if overdue, user can extend the due date by up to 31 days.
Note: The service due date will only show at 90 days prior to the preset date.
3.8. Sensor Zeroing
At the end of warm-up, each sensor is zeroed, as shown in
3.8.1. Zero Faults
If a Zero Fault is detected, the monitor should be restarted in fresh air. If the fault persists, recalibrate
the monitor. If that fails, return the monitor to an approved service center.
Two types of Zero Fault are possible:
• A positive zero fault - indicated by a flashing gas reading.
• A negative zero fault - indicated by a wrench symbol alternating with a zero reading.
16
Figure 11: Service Due Date
Figure 12: Service Overdue
Figure 13: Service Due - Switch Off
Figure 14: Zero Sensors
Figure 1 1: Service Due
Figure 14: Zero
Sensors.
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Revision D
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