QRAE II User Guide
Page 51
When calibration is complete, you will see the screen change between these two:
Multiple Sensor Calibrated!
and
CO = Pass
H2S = Pass
O2 = Pass
LEL = Pass
A sensor calibration failure is indicated like this:
CO = Fail
H2S = Pass
O2 = Pass
LEL = Pass
If a sensor fails, try calibrating again. If calibration fails again, replace the sensor.
6.6 Single Sensor Calibration
This procedure determines the second point of the sensor calibration curve for a single
sensor. The display counts down from 60 to 0 seconds, and then shows the name of each
sensor, whether it passed or failed calibration, and the calibrated value for each sensor.
Select the sensor to calibrate by pressing [MODE] until the sensor’s name is highlighted.
Then press [Y/+] to toggle the selection on (indicated by an asterisk, *) or off (no
asterisk).
After you have selected the sensor you want calibrated, it is time to perform the
calibration.
1. Attach the Calibration Adapter to the QRAE II (diffusion model only).
2. Attach the regulator to the Calibration Gas cylinder.
Important! Make sure you have the correct calibration gas in the correct
concentration. Also make sure that the calibration gas is not beyond its “Best
when used by” date, which is stamped on the cylinder’s label.
3. If your model is a QRAE II diffusion model, attach a hose to the Calibration
Adapter and to the regulator. If it is a QRAE II Pump model, attach a hose to the
regulator and to the inlet on the front of the QRAE II Pump.
4. Turn on the regulator to start the Calibration Gas flow.
5. Press [MODE] until OK is highlighted.
6. Press [Y/+] to start calibration.
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