AreaRAE Plus & AreaRAE Pro User’s Guide
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Change Span Value
You can individually set the span gas concentration for each sensor. This concentration setting will also
be used for a bump test. The units of measure (ppm, %LEL, etc.) are shown on the display.
1. Scroll down the list of sensors using the [N/-] key.
2. Press [Y/+] to select it.
3. Press [N/-] to step through the digits.
4. Press [Y/+] to increase the number from 0 through 9. Once the number 9 is reached, pressing
[Y/+] causes the numbers to “wrap around” to 0 and count up again.
5. Once you have set the desired value, press [MODE] for “Done.” This registers the new span value.
Change Span 2 Value
For enhanced accuracy, it is possible to perform a second Span calibration in addition to Zero
and Span calibrations. Your instrument first must be set to allow this third calibration. This
requires using ProRAE Studio II software and a PC, as well as a higher concentration of
calibration gas. Note: 3-point calibration is the default for AreaRAE Pro for ppb resolution or the
high range (0 to 5,000 ppm); for other configurations, 2-point calibration is the default.
Note: You can only disable 3-point calibration capability by using ProRAE Studio II again.
1. Press [Y/+] to select VOC.
2. Press [N/-] to step through the digits.
3. Press [Y/+] to increase the number from 0 through 9. Once the number 9 is reached, pressing
[Y/+] causes the numbers to “wrap around” to 0 and count up again.
4. Once you have set the desired value, press [MODE] for “Done.” This registers the new second span
value.
5. Press [Y/+] for “Save” and [N/-] for “Undo.”
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