WIKA A2G-50 User Manual

Page 11

WIKA operating instructions air2guide model A2G-50

40202780.02 05/2012 GB/D/F/E/I

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

calibrating the zero point. Remove both hoses from the pressure

connections ⊕ and ⊖.

■

Press the zero key until the red LED switches on.

■

Wait until the LED switches off again and install the hoses to the

pressure connections again.

■

In normal operation, we recommend that a zero point calibration is

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.

6. Commissioning, operation / 7. Zero point adjustment

Output signal 0 ... 10 V

Connection diagram

Output signal 4 ... 20 mA

Supply voltage

AC 24 V / DC 24 V