Rae QRAE PLUS PGM-2000, Operation & Maintenance Manual

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OPERATION
2-12
2.3. Alarm Signals
The built-in microcomputer constantly monitors and updates
gas concentrations and compares them with the programmed
alarm limits (TWA, STEL, Low and High). Whenever a gas
concentration exceeds any of the preset limits, the buzzer, red
flashing LED, vibration alarm and the backlit LCD are activated
immediately to warn the user of a potentially hazardous
condition.
In addition, the QRAE PLUS will alarm if any of the following
condition occurs: battery voltage falls below a pre-set voltage
level (3.3V), LEL sensor turns off, pump shuts off, datalog
memory error or datalog memory is full, etc.
WARNING!
The QRAE Plus, portable gas detector has been designed
for the detection of oxygen deficiencies, flammable gas,
and toxic vapor levels. An alarm condition indicating the
presence of one or more of these potentially life-
threatening hazards should be taken very seriously.
In the event of an alarm condition it is important to follow
established procedures. The safest course of action is to
immediately leave the affected area, and return only after
further testing together with other appropriate safety
procedures to determine that the area is once again safe
for entry.