Testing The Gamma Radiation Sensor; Zero Calibration For Parts-Per-Billion (Ppb) Pid Sensor; Fresh Air Calibration - Honeywell AreaRAE Plus User Manual

AreaRAE Plus & AreaRAE Pro User's Guide

15.2.2 Testing The Gamma Radiation Sensor

The gamma radiation sensor does not require user calibration. To check whether the sensor is
operational, place a gamma check-source on the upper half of the rear of the AreaRAE Plus/Pro
equipped with a gamma sensor. The reading should increase.

15.2.3 Zero Calibration For Parts-Per-Billion (ppb) PID Sensor

IMPORTANT! The 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 the sensor in ambient air will
not allow for a true zero to be set. The parts-per-billion PID sensor should be zeroed with ambient air
using a charcoal filter or a VOC zeroing tube. Refer to the procedure on page 71.

15.2.4 Fresh Air Calibration

This procedure determines zero points of most sensors. The AreaRAE Plus/Pro should be zero-calibrated
in clean air with 20.9% oxygen or with a cylinder of clean zero air.
Note: If you use a zero air cylinder, you must connect it directly to the filter that is attached to the
instrument's inlet.
At the Calibration menu, select "Fresh Air" by pressing [Y/+] once to enter fresh air calibration.
After a timer countdown, the zero calibration is done. The LCD displays the sensor names and tells you
whether each calibration passed or failed, followed by the sensor readings.
Note: You can abort the calibration at any time during the countdown by pressing [N/-].
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