INFICON Edge CDG045D2 1 … 1000Torr / mbar - Manual (Page 25)

tina86e1 (2013-11) 25
4.2.1
<ZERO> Adjustment
The zero can be adjusted via
• the <ZERO> button on the gauge,
• the diagnostic port (→  [4]),
• the digital input "Remote Zero" (briefly apply the
supply voltage to pin 10),
• the RS232C interface (→  [4]),
• an INFICON Vacuum Gauge Controller (VGC series).
While the gauge is being heated and/or under atmos-
pheric pressure, the zeroing function is locked in order
for operating errors to be prevented.

Evacuate the gauge to a pressure according to the table
below:
F.S.
Recommended final pressure for
zero adjustment
1100 mbar
1000 Torr/mbar
500 Torr/mbar
200 Torr/mbar
100 Torr/mbar
50 Torr/mbar
20 Torr/mbar
10 Torr/mbar
5
Torr/mbar
2 Torr/mbar
1 Torr/mbar
−
<5×10
-2 Torr
<2.5×10
-2
Torr
<10 -2 Torr
<5×10
-3
Torr
<2.5×10 -3 Torr
<10
-3
Torr
<5×10 -4 Torr
<2.5×10
-4
Torr
<10 -4 Torr
<5×10
-5
Torr
<6.65×10
0
Pa
<6.65×10 0 Pa
<3.33×10
0
Pa
<1.33×10 -0 Pa
<6.65×10
-1
Pa
<3.33×10 -1 Pa
<1.33×10
-1
Pa
<6.65×10 -2 Pa
<3.33×10
-2
Pa
<1.33×10 -2 Pa
<6.65×10
-3
Pa
<5×10
-2
mbar
<5×10 - 2 mbar
<2.5×10
-2
mbar
<10 -2 mbar
<5×10
-3
mbar
<2.5×10 -3 mbar
<10
-3
mbar
<5×10 -4 mbar
<2.5×10
-4
mbar
<10 -4 mbar
<5×10
-5
mbar
If the final pressure is too high for zero adjustment (>25%
of the F.S.), the zero cannot be reached and the
<STATUS> LED blinks green. If this is the case, activate
the factory setting and adjust the zero again (
→  32).

Operate the gauge for at least 90 minutes under constant
ambient conditions (until the signal is stable).