Zero Point Adjustment - WIKA A2G-50 Manual De Instrucciones

6. Commissioning, operation / 7. Zero point adjustment
Commissioning
A prerequisite for the commissioning is a proper installation of all
electrical supply, control and measuring lines and of the pressure
connection lines. Before commissioning, the leak tightness of the
pressure connection lines must be checked.

7. Zero point adjustment

7.1 Standard
Attention! The power supply must be connected one hour before
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calibrating the zero point. Remove both hoses from the pressure
connections ⊕ and ⊖.
Press the zero key until the red LED switches on.
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Wait until the LED switches off again and install the hoses to the
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pressure connections again.
In normal operation, we recommend that a zero point calibration is
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carried out every 12 months.
7.2 Automatic zero adjustment (option)
The automatic zero adjustment makes the instrument maintenance-
free. The element adjusts the zero point from time to time and thus
prevents a zero point drift of the piezo-resistive sensor element.
During the zero adjustment the display and output value remains
at the last measured value. The automatic zero adjustment takes
4 seconds and is repeated every 10 minutes.
WIKA operating instructions air2guide model A2G-50
GB
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