GT-FIRE
PORTABLE GAS DETECTOR
67816
Revision D
16
3. Service Due enabled - if overdue, message is displayed as shown in
Figure 11: Service Due
Date
, but after five seconds, the monitor warm-up continues automatically.
Figure 11: Service Due Date
4. Service Due enabled - if overdue, user acknowledge is required.
Figure 12: Service Overdue
5. Service Due enabled - if overdue, user can extend the due date by up to 31 days.
Figure 13: Service Due - Switch Off
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
Figure 14: Zero Sensors
.
Figure 14: Zero Sensors
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.