Nor-Cal CDG 025 OP Lit - Manual (Page 20)

20 CDG025-OP-LIT (2010-1)
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. ∆ U / 90°
1000 Torr
≈2 mV
100 Torr
≈10 mV
10 Torr
≈50 mV
1 Torr
≈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.
4.2.1
<ZERO> Adjustment

Evacuate the gauge to a pressure according to the table
below:
F.S.
Recommended final pressure
for zero adjustment
1000 Torr
100 Torr
20 Torr
10 Torr
2 Torr
1 Torr
<5
×10 -2
Torr
<5
×10 -3
Torr
<1
×10 -3
Torr
<5
×10 -4
Torr
<1
×10 -4
Torr
<5
×10 -5
Torr
If the final pressure in the gauge is too high for zero ad-
justment (>25% of the F.S.), the zero cannot be reached
and the LED flashes. If this is the case, activate
the factory setting and adjust the zero again (
→  23).

Operate the gauge for at least 15 minutes (until the signal
is stable).