QRAE II User Guide
Page 52
You should see a countdown from 60 seconds:
Calibration
in progress ... 60
Note: If you see the following message, check that the gas is flowing and the hose is
attached:
No Gas Flow... Apply gas or hit any key to start.
When calibration is complete, you will see the screen change. If the sensor calibration
passes, then you should see this message (shown here for carbon monoxide, CO):
CO calibration pass!
If the sensor calibration fails, try calibrating again. If calibration fails again, replace the
sensor.
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