PROGRAMMING THE AREARAE
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4.8 Change Sensor Configuration
In Program Mode, you may change several sensor-related
configurations of the AreaRAE monitor. The Sensor
Configuration Submenu contains these configurations:
Change LEL/VOC Gas Selection?
Enable / Disable Sensors?
Change Dilution Ratio?
Change PID Lamp Type?
Change RAD Unit? *
* On AreaRAE Gamma and AreaRAE Gamma Steel
only.
Before these submenus are described, the term “Correction
Factor” needs to be explained:
4.8.1 Correction Factor
The PID and LEL sensor used in the AreaRAE are broadband
sensors (that is, they respond to a broad range of gases).
These sensors typically show a different sensitivity to different
gases. The correction factor for a specific gas is defined as:
Sensitivity to a calibration gas
Correction Factor = ___________________________
Sensitivity to a specific gas
Correction factors are often used to obtain a calculated
concentration of a specific gas while using a different gas
during calibration.
The AreaRAE stores three sets of correction factors: One for
the LEL sensor, one for the 10.6 eV PID sensor and the other
for the 11.7 eV PID sensor. Each set consists of 20 to 40
different gases. You can choose one gas from the list to be the
calibration gas and another gas to be the measurement gas.
For example, you can choose methane as the calibration gas
for the LEL sensor and select pentane as the measurement
