Honeywell AreaRAE Plus User Manual page 56

AreaRAE Plus & AreaRAE Pro User's Guide
Single Sensor Zero
This allows you to perform zero (fresh air) calibration on individual sensors. Even though most toxic gas
sensors can be zeroed in fresh air, some sensors such as a parts-per-billion PID sensor for volatile organic
compounds (VOCs) should not be zeroed in fresh air. VOCs are normally present in ambient air, so
zeroing these sensors in ambient air will not allow for a true zero to be set for such sensors. The parts-per-
billion PID sensor with should only be zeroed with zero air or in ambient air using a charcoal filter or a
VOC zeroing tube.
1. If you are using a charcoal filter, connect it to the instrument.
2. If you are using dry air, connect the instrument to a source of zero air.
3. At the Calibration Menu, select "Single Sensor Zero." Press [Y/+] once to enter the zero calibration
sub-menu.
4. Start the flow of zero air, if used.
5. Press [Y/+] to start zero calibration.
6. A countdown screen appears. You can abort the calibration at any time during the countdown by
pressing [N/-].
Note: Dotted line indicates automatic progression.
7. If the calibration is not aborted, the display shows the sensor names and tells you whether the zero
calibration passed or failed, followed by the sensors' zero calibration readings.
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