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Cal. Reference
It is sometimes desirable to calibrate a sensor (PID for VOC, and LEL) with a specific gas for best
response to a gas you are surveying. The Cal. Reference library contains a list of reference gases
that can be selected for the PID and LEL sensors. Choose the sensor, and then select from the
list of reference gases.
Change Cal. Gas
You can change the calibration gas for the AreaRAE Plus/Pro's PID and LEL sensors. Select
from a custom list that you create (My List), the last ten gases used, the built-in gas library for
your PID lamp, and user-defined custom gases. Each gas is shown in the list for selection and
the screen automatically changes to show its full name, chemical formula, molecular weight
(M.W.) and correction factor (CF).
Multi Cal. Select
This menu allows you to define a group of sensors to be bump tested and span calibrated
together. Simultaneous testing and calibration of multiple sensors shortens the bump test and
calibration processes and reduces the number of individual gas cylinders you need. For
example, it may be more efficient to use a single cylinder with a four-gas mix including 50% LEL
Methane, 18% O
2
at one time, compared to using four distinct gas cylinders and calibrate these sensors
individually in sequence. In order for sensors to be calibrated together, all of them must be
selected using Multi Cal. Select.
1.
Scroll down the list of sensors using the [N/-] key.
2.
Add or remove that gas from the list by pressing [Y/+]. An "X" in a box to the left of a
sensor's name indicates it is selected.
AreaRAE
, 10 ppm H
S, and 50 ppm CO, to calibrate the LEL, O
2
60
, CO, and H
S sensors
2
2
User Manual
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