PROGRAMMING THE AREARAE
4-7
4.4 Calibrating the AreaRAE
WARNING
The calibration of all newly purchased RAE Systems instru-
ments should be tested by exposing the sensor(s) to known
concentration calibration gas before the instrument is used or
put into service. For maximum safety, the accuracy of the
AreaRAE should be checked by exposing the sensor(s) to
known concentration calibration gas before each day’s use.
In Program Mode, you may recalibrate sensors in the AreaRAE
monitor. This is a two-point calibration process using fresh air
and the standard reference gas. First, fresh air, which contains
20.9% oxygen and no detectable VOC, toxic or combustible
gases, is used to set the zero point for each sensor. Then a
standard reference gas (also known as span gas), which
contains a known concentration of a given gas, is used to set
the second point of reference. The two-point calibration
procedure is detailed on the next page.
These are the submenus for calibration operations:
Fresh Air Calibration?
Multiple Sensor Calibration?
Single Sensor Calibration?
Modify Span Gas Value?
Change LEL/VOC Span Gas?
NOTE:
The gamma radiation sensor in the AreaRAE Gamma
and AreaRAE Gamma Steel is factory calibrated with a fixed
gamma radiation source. There is no need to calibrate the
gamma sensor in the field.