INFICON Helium Leak Detector Modul1000 - Manual (Page 52)

6-11
Operation
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6.8 Calibration in Auto Leak Test
There are four different ways of calibration:
• Internal automatic
• Internal manual
• External automatic
• External manual
For the external calibration, a separate test leak is required, which is mounted on the
chamber.
In Partial Flow mode, always perform an external calibration.
Sequence of calibration:
1 open the test leak or it opens automatically,
2 evacuate,
3 acknowledge steady-state signal when calibrate manually,
4 autotune (Calibration to maximum sensitivity),
5 vent to atmospheric pressure,
6 evacuate, after the measuring time is over, take the signal with open test leak,
7 vent to atmospheric pressure,:
8 close the test leak, evacuate, after the measuring time take the background signal,
9 vent to atmospheric pressure.
6.9 Calibration in Commander mode
During the calibration, the test gas supply is not enabled.
There are four different ways of calibration:
• Internal automatic
• Internal manual
• External automatic
• External manual
For the external calibration, a separate test leak is required, which is mounted on the
chamber.
The calibration procedure is the same as it is for the vacuum mode.