Zero - Crowcon IR Display Installations-, Bedienungs- Und Wartungsanleitung

9.3 Zero

On pressing 'Enter' at the 'ZERO' screen, the display will scroll between the two screens
below.
Make sure the IRmax is in clear air.
Press the 'Enter' key to continue with zeroing. A 'double-click' on the key will abort the
zero option.
While the zeroing proceeds, the display will show the screen below:
The progress bar will count down in about 5 seconds. Once it has started, the zero
operation cannot be aborted.
When zeroing is complete, the display will indicate the result of the operation. If the zero
has been successful, the screen will scroll between 'ZERO' and 'PASS' (above left). If not,
the screen will scroll between 'ZERO' and 'FAIL' (above right).
Possible reasons for failure of calibration zero:
a. Lamp or IRmax failure.
b. Zero gas reading is out of acceptable range.
Press the 'Enter' key to revert to the menu options.
Controlling the IRmax Controlling the IRmax
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