INFICON UL1000 Helium leak detector Interface description - Manual (Page 12)

1-8
Interface Description
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1.8 Calibration via RS232
Two different kinds of calibration can be called via „*CAL“:
1.8.1 Internal Automatical Calibration
When the leak detector is in STAND-BY mode the command „*CAL“ evokes an
internal autmatical calibration. The process is completely automatical. Via
„STATus?“ the computer can realise if the calibration routine is finished.
1.8.2 External Calibration
When the leak detector is in measurement mode the command „*CAL“ evokes a
calibration routine for external calibration. Before starting the external calibrated leak
has to be opend and the leak rate signal has to be stable. Via the command
„*STATus:CAL?“ the computer can detect when the external calibrated leak has to
be closed
When the external calibrated leak is closed and the leak rate signal stable the
computer has to advise the leak detector via a second command „*CAL“. Via the
command „*STATus?“ the computer can recognize when the calibration routine has
finished.