OPERATION OF IAQRAE
2-12
Table 2.2
Alarm Signal Summary
Condition Alarm
Signal
Message on
LCD Screen
Gas exceeds
High Alarm limit
3 beeps & flashes
per second
“High”
Gas exceeds
Low Alarm limit
2 beeps & flashes
per second
“Low”
Negative Drift
3 beeps & flashes
per second
“NEG”
Over Range
3 beeps & flashes
per second
“OVR”
Pump failure
3 beeps & flash per
second
“Pump”
PID lamp failure
3 beeps/flash per
second
“Lamp”
Low battery
1 beep per minute
“Bat”
Memory full
1 flash per second
“Mem”
Alarm Signal Testing
Under normal conditions, it is possible to test the LED, buzzer,
and backlight by momentarily pressing [Y/+]. The buzzer will
beep once, and the LED and backlight will flash once to
indicate alarm signals are functioning correctly.
WARNING
Because alarm signals are disabled during PC Communication
and Calibration modes, it is highly recommended to use these
modes only in areas known to be non-hazardous, in order to
reduce the risk of exposure to hazardous atmospheres.
