6 | Operation
INFICON
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T-Guard2_Operating-instructions-jina85en1-13-(2009)
6.4.4 Calibrate
NOTICE
Incorrect calibration because of unsuitable calibration leak
An unsuitable calibration leak leads to an incorrect calibration and therefore to
incorrect measurement results.
► An accurate calibration is achieved with client-specific calibration leaks by
INFICON.
► Ideally, produce a master test object with a built-in calibration leak.
► The calibration leak rate must be greater than half of trigger level 1. Possible leak
rates are 5 × 10
-6
bis 15 mbar l/s.
The device must be calibrated before the first measurement.
Calibration is only possible after the device has completed the warm-up phase. Before
this point, the relevant menu item is not displayed.
In the following operation, you only need to calibrate again if the measurement setup
or the measurement conditions are changed:
• Accumulation measurement:
– Change to the accumulation volume
– Change to the measurement time for manual measurement time entry
– Change to the trigger value
• Carrier gas measurement
– Change to the carrier gas flow
– Change to the measurement time for manual measurement time entry
The measurement time during the calibration is set automatically. You can change the
measurement time if necessary; a shorter measurement time, however, leads to lower
reproducibility (“Measurement settings > Set times > measurement time”).
Fig. 19: Access to the calibration settings
Содержание 540-200
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