INFICON UL1000 Helium leak detector - Manual (Page 93)

Calibration
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7.3 Factor of Calibration - Range of Values
To avoid a faulty calibration the factor of calibration is tested for plausibility at the end
of the calibration routine:
When the new factor of calibration is not considerably higher or lower (< factor 2)
than the previous factor of calibration the new factor will be accepted automatically.
When the new factor of calibration diverges stronger from the previous factor the
user can decide if he wants to accept it anyway (e. g. after changing the system
configuration) or not (e. g. because of a maloperation).
Notice: When calibration is started via SPS or RS232 no testing for plausibility is
occuring.
When calibrating internal it is also monitored if the newly calculated factor of
calibration is higher than 10 or lower than 0.1. In this case a warning (see W81 resp.
W82 in chapter Refer to chapter 8.2) is displayed and the calibration will be
interrupted.