Pfeiffer Vacuum CCR 351 Operating Instructions Manual page 18


Evacuate the gauge to a pressure according to the
following table:
If the final pressure is too high for a zero adjustment (>25%
of F.S.), zero cannot be reached.

Briefly press the button with a pin (max. ø1.1 mm), or ...
... apply supply voltage to Remote Zero at pin 7 (Pulse
→  7).
Zero adjustment runs automatically (duration ≈ 8 s).
18
F.S.
<5×10
1000 Torr
100 Torr <5×10
<5×10
10 Torr
max. ø1.1 mm
After the zero adjustment, the gauge automatically
returns to the measurement mode.
Recommended final pressure
for zero adjustment
-2
Torr <7×10
-3
Torr <7×10
-4
Torr <7×10
Taster kurz drücken Press the button briefly
-2 -2
hPa <7×10
-3 -3
hPa <7×10
-4 -4
hPa <7×10
BG 5140 BEN (2017-09)
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