Fig. 75: Manual Calibration Error; Fig. 76: Datalogger Screen With Red Calibration Symbol - M&C GENTWO PMA1000 Instruction Manual

Errors during manual calibration procedure
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Fig. 75: Manual calibration error

An error occurs during the manual calibration procedure, when the test gas has the wrong
gas concentration or the actual value does not fit into the predefined measuring range of
the gas concentration.
The label on the green button changes to 'Error' and the manual calibration procedure
can not be completed.
In the example above, ambient air was used for the calibration procedure. The measuring
range was predefined from -2.0 to +2.0 vol%. The oxygen concentration in ambient air
does not fit into this predefined measuring range. The calibration procedure could not be
completed.

Fig. 76: Datalogger screen with red calibration symbol

The data logger shows the failed calibration attempt with a red symbol. Tapping the red
calibration symbol makes the screen in Fig. 77 appear.
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