AVE VCR 322 PLUS Manual de Instruções descarregar pdf (Página 20)

tqna49e1 (2010-05)

4.2 Zeroing the Gauge

The gauge is factory calibrated while "standing upright"

(→ "Calibration Test Report").

We recommend performing a zero adjustment, when the

gauge is operated for the first time.

Due to long time operation or contamination, 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.

The output signal (measuring signal) is depending on the moun-

ting orientation. The signal difference between the vertical and

horizontal mounting orientation is:

F.S. ΔU / 90°

1000 Torr/mbar ≈2 mV

100 Torr/mbar ≈10 mV

10 Torr/mbar ≈50 mV

1 Torr/mbar ≈300 mV

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.

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AVE VCR 322 PLUS Manual de Instruções Página 20