INFICON Gemini ATM to Ultra-High Vacuum Gauge - Manual (Page 39)

tina83e1-a (2014-02) 39
For adjusting the zero, operate the gauge under the same con-
stant ambient conditions and in the same mounting orientation
as normally.

If you are using a seal with centering ring and filter, check
that they are clean or replace them if necessary
(
→ "Deinstallation").

Put the gauge into operation and operate it at atmospheric
pressure for at least 10 minutes.

Press the <ADJ> button with a pin (max. ø1.1 mm) and the
ATM adjustment is carried out: The Pirani sensor is ad-
justed to 1000 mbar (duration
≈5 s).
ATM
HV
If the pressure value 1000 mbar is output at the
measurement value output, the adjustment has been
successful. Otherwise, repeat the adjustment proce-
dure.

Evacuate the vacuum system to p < 10
-5
mbar and wait at
least 2 minutes.