INFICON Porter CDG020D 10 ... 1000 Torr / mbar - Manual (Page 20)

20 tina80e1 (2012-06)
4 Operation
Put the gauge into operation. If you are using an INFICON con-
troller, define the measurement range (
→  [2], [3], [4]).
Warm-up time: approx. 1 minute.
4.1 Zeroing the Gauge
The gauge is factory calibrated while "standing upright". It re-
quires no maintenance.
Due to mounting orientation, long time operation or contamina-
tion, a zero drift could occur and zero adjustment may become
necessary.
For adjusting the zero, operate the gauge under the same con-
stant ambient conditions and in the same mounting orientation
as normally.
If the gauge is operated via a controller, the zero of the
whole measuring system has to be adjusted on the
controller: first, adjust the zero of the gauge and then,
the zero of the controller.
4.1.1 Zero Adjustment
The zero can be adjusted via
• the button on the gauge, or
• the digital input "Remote Zero Adjust " (briefly apply the
supply voltage to pin 7 (D-Sub connector) or to pin 4 (FCC68
and Binder M12 connector)), or
• an INFICON Vacuum Gauge Controller (VGC series).