MUNI User’s Guide
8
3.2 Alarm Overview
The MUNI provides an unmistakable four-way alarm notification that includes an audible
buzzer, bright LED lights, vibration, and alarm notification on the display. The alarm thresholds
can be programmed and the sensors selectively turned on or off.
During each measurement period, the gas concentration is compared with the programmed alarm
limits for Low, High, TWA and STEL alarms. If the concentration exceeds (or goes below, in the
case of oxygen) any of the preset limits, the alarms are activated immediately to warn both the
MUNI user of the alarm condition. In addition, the MUNI alarms when the battery voltage is low
and in other fault conditions.
Alarm Types and Priority
Alarm Type
Red LED
Buzzer
Vibrator
Max Sensor Alarm
(Sensor response limit)
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
Sensor Fail Alarm
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
Over-range Alarm
(Firmware display limit)
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
High Gas Alarm
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
Low Gas Alarm
2 Flashes/sec
2 Beeps/sec
1 Vibration/sec
Negative Drift
1 Flash/sec
1 Beep/sec
1 Vibration/sec
STEL Alarm
1 Flash/sec
1 Beep/sec
1 Vibration/sec
TWA Alarm
1 Flash/sec
1 Beep/sec
1 Vibration/sec
Calibration Fail
1 Flash/sec
1 Beep/sec
1 Vibration/sec
Bump Test Fail
1 Flash/sec
1 Beep/sec
1 Vibration/sec
Battery Low
1 Flash/min
1 Beep/min
1 Vibration/min
Pr
ior
it
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igh
est
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