Calibration - Honeywell AreaRAE Plus User Manual

AreaRAE Plus & AreaRAE Pro User's Guide

12.3.9 Calibration

Use this menu to perform a bump test or zero or span calibration for one or more sensors, and change the gas
concentration value used in bump tests and span calibration, as well as choose which sensors will be calibrated at the
same time.
Fresh Air
This procedure determines the zero point for all the sensors that require a zero calibration. For the oxygen
sensor, Fresh Air calibration sets the point equal to the concentration of oxygen in ambient air
(approximately 20.9% volume).
Note: Fresh air calibration is performed on all enabled gas sensors at the same time.
To perform Fresh Air calibration on multiple sensors:
1. Connect the instrument's inlet to a source of dry, clean ambient air.
2. At the Calibration Menu, select "Fresh Air." Press [Y/+] once to enter the fresh air calibration sub-
menu.
3. Start the flow of dry zero air, if used.
4. Press [Y/+] to start fresh air calibration.
5. A countdown screen appears. You can abort the calibration at any time during the countdown by
pressing [N/-].
Note: Dotted line indicates automatic progression.
6. If the calibration is not aborted, the display shows the sensor names and tells you whether the fresh air
calibration passed or failed, followed by the sensors' fresh air readings.
Multi Sensor Span
Depending on the configuration of your AreaRAE Plus/Pro and the span gas you have, you can perform a
Span calibration simultaneously on multiple sensors.
The selected sensors are shown on the screen, along with the concentration settings for their Span gas.
With calibration gas connected to the instrument, start a multi span by applying gas to the instrument.
Calibration should start after a few seconds. If not, press [Y/+]. If you do not want to perform a multi
span, press [MODE].
Note: You can abort a multi span by pressing [N/-] once testing has started.
When the Multi Span is done, a screen is shown, with the sensor names and either "Pass" or "Fail" shown
next to them.
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