Adixen ASM 142, User Manual

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C 300
Calibration of the leak detector
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Purpose of the
internal calibration
Check that the leak detector is correctly adjusted to detect the carrier
gas selected and to display a correct leak value.
To calibrate the leak detector, a calibrated leak is used as a reference:
the leak detector is equipped with an internal helium calibrated leak
with reservoir and temperature compensation sensor.
The internal calibration could be:
- fully automatic if the operator uses the calibrated leak in the detector,
- semi-automatic if the operator uses an external calibrated leak.
When should an
internal calibration be
performed?
• When starting the leak detector in order to make sure that it is in
proper operating condition.
• For high sensitivity test and optimized measurement accuracy: it is
advised to let the internal temperature of the leak detector stabilize for
about 30 min after start-up and then start a calibration.
• If in doubt regarding the proper operation of the leak detector
(capability to properly detect a helium leakage). At any time, an
internal calibration may be started.
• In case of intensive and continuous use: start an internal calibration
at the begining of each shift (8 hours of operation).
Internal calibrated
leak
The internal calibrated leak is specifically designed to fit the present
leak detector. It is composed of:
• a helium reservoir,
• a temperature sensor (used to take into account the effect of
temperature on the leak rate),
• a built in membrane (to calibrate the helium leak rate),
• a special quick connection device,
• an identification label (similar to the identification label of an
external calibrated leak).
It is delivered with a calibration certificate.
Calibrated leak location F 700
Recalibration It is recommended to have each calibrated leak recalibrated at regular
intervals to validate its value.
Accessories A 700