WIKA A2G-25 Betriebsanleitung Seite 19

5. Commissioning, operation
5.4 Zero point setting
5.4.1 Standard
Connect the voltage supply one hour before making the zero point
setting
1. Remove both hoses from the pressure connections ⊕ and ⊖.
2. Press the zero button until the red LED switches on.
3. Wait until the LED switches off again and install the hoses to the
pressure connections again.
4. In normal operation, we recommend that a zero point calibration is
carried out every 12 months.
5.4.2 Automatic zero point setting (option)
The automatic zero point setting makes the instrument maintenance-
free. The element corrects the zero point from time to time and thus
prevents a zero-point drift in the piezoresistive sensor element.
During the zero point setting the display and output value remains at the
last measured value. The automatic zero point setting takes 3 seconds
and is repeated every 10 minutes.
WIKA operating instructions model A2G-25
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