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MiniRAE Lite User’s Guide
17
Alarm Signals
During each measurement period, the gas concentration is compared
with the programmed alarm limits (gas concentration alarm limit
settings). If the concentration exceeds any of the preset limits, the
loud buzzer and red flashing LED are activated immediately to warn
you of the alarm condition.
In addition, the instrument alarms if one of the following conditions
occurs: battery voltage falls below a preset voltage level, failure of
the UV lamp, or pump stall.
Alarm Signal Summary
Message Condition
HIGH
Gas exceeds “High Alarm”
limit
OVR
Gas exceeds measurement
range
MAX
Gas exceeds electronics’
maximum range
LOW
Gas exceeds “Low Alarm”
limit
Pump
Pump failure
icon
flashes
Lamp
PID lamp failure
Battery
icon
flashes
CAL
NEG
Low battery
Alarm Signal
3 beeps/flashes per second
3 beeps/flashes per second
3 beeps/flashes per second
2 beeps/flashes per second
3 beeps/flashes per second
3 beeps/flashes per second plus
“Lamp” message on display
1 flash, 1 beep per minute plus
battery icon flashes on display
Calibration failed, or needs 1 beep/flash per second
calibration
Gas reading measures less 1 beep/flash per second
than number stored in
calibration
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