Rae QRAE 3 User Manual - page 16
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6.3. Testing Alarm Indicators
Under normal-operation mode and non-alarm conditions, the buzzer, vibration alarm, LED, and
backlight can be tested at any time by pressing [Y/+] once.
IMPORTANT!
If any of the alarms do not respond to this test, check the Alarm Settings in Programming Mode.
It is possible that any or all of the alarms have been turned off. If all of the alarms are turned on,
but one or more of them (buzzer, LED lights, or vibration alarm) does not respond to this test, do
not use the instrument. Contact your RAE Systems distributor for technical support.
6.4. Pump Status
IMPORTANT!
During operation, make sure the probe inlet and the gas outlet are free of obstructions.
Obstructions can cause premature wear on the pump, false readings, or pump stalling. During
normal operation, the pump icon alternately shows inflow and outflow as shown here:
If there is a pump failure or obstruction that disrupts the pump, the alarm sounds and you see this
icon blinking on and off:
Once the obstruction is removed, you can restart the pump by pressing the [Y/+] key. If the pump
does not restart, and the pump stall alarm continues, consult the Troubleshooting section of this
guide or contact your RAE Systems distributor for technical support.
Note:
Pump Status is not indicated on the diffusion QRAE 3.
6.5. Calibration Status
If one or more sensors requires calibration, then the screen displays the word “Alarm” at the top
and alternates between the sensor reading and the word “Cal” with a highlighted background:
Calibration is required if:
The sensor module has been replaced with one whose calibration is overdue.
The defined period of time between calibrations has been exceeded. (See Section 9 for
information on policy enforcement.)
If you have changed the calibration gas type without recalibrating the instrument.
The sensor has failed a previous calibration.