Edwards Barocel 7025M, Инструкция по эксплуатации

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Page 18
W601100880_A - Operation
Operation
Put the gauge into operation. If you use an Edwards controller, specify the measurement
range.
Warm-up time: approximately 1 minute
To zero the gauge
The gauge is factory calibrated in an upright orientation. It requires no maintenance.
Continuous operation or contamination can lead to zero drift and the gauge will need zero
adjustment.
To adjust the zero, operate the gauge under the same constant ambient conditions and in the
same mounting orientation as normal.
Note:
If the gauge is operated through a controller, the zero of the whole measurement system has
to be adjusted on the controller. Adjust the zero of the gauge first and then on the controller.
<ZERO> Adjustment
The zero can be adjusted by:

The <ZERO> button on the gauge

The digital input "Remote Zero Adjust" (briefly apply the supply voltage to pin 7 of
the D-Sub connector, or to pin 4 of the FCC68 and Binder M12 connector

An Edwards vacuum gauge controller.
To adjust the zero:
1. Evacuate the gauge to a pressure according to the table below:
Note:
If the final pressure in the gauge is too high for zero adjustment (> 25% of F.S.), the zero cannot
be reached.
F.S. Recommended final pressure for zero adjustment
1100 mbar - < 6.65 × 10
0
Pa < 5.0 × 10
-2
mbar
1000 Torr < 5.0 × 10
-2
Torr < 6.65 × 10
0
Pa < 5.0 × 10
-2
mbar
100 Torr/mbar < 5.0 × 10
-3
Torr < 6.65 × 10
-1
Pa < 5.0 × 10
-3
mbar
10 Torr/mbar < 5.0 × 10
-4
Torr < 6.65 × 10
-2
Pa < 5.0 × 10
-4
mbar