Adixen ASM 142, User Manual

Page: 146 / 336

C 430
3 masses option
GB
00
985
-
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05
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M
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rc
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04
Purpose
Leak detection is used to detect micro-openings, porosities, etc. in
test parts. The detection of these passages involves the use of a light
gas, which is capable of infiltrating the smallest passages quickly. The
standard gas used is the Helium 4 but the operator has the possibility
with the 3 masses option to use another gases: Hydrogen or Helium 3.
Background is much higher in H
2
.
The unit equipped with the 3 masses option does not have any
external differences in relation to the standard unit. The modifications
are inside the unit (analysis cell magnet and electronic supervisor
board).
Typical background values, in cycle, detector on itself:
- At start ± low range 10 -5 mbar.l/s.
- After 2 or 3 hours ± low range 10 -6 mbar.l/s.
The 3 masses option purpose, used with Hydrogen, is the leak
research only and not the continuous analysis of the hydrogen
concentration of a gas.
The leak detector is not adapted for a hydrogen concentration
continuous analysis. The leak detector use in such conditions,
as well as the hydrogen concentration of the gas used, are
under the supervision of the user.
Gas selection
The functions are the same as the standard detector.
Adjustment
4x
C 110
Calibration in
Hydrogen or Helium 3
Procedure
The leak detector can be calibrated in Hydrogen or Helium 3 with an
external calibrated leak connected to the leak detector inlet.
Connect an Hydrogen or Helium 3 calibrated leak at the inlet of the
leak detector.
The operator should adjust the parameters of the calibrated leak used.
Calibrated leak values programming C 305
Calibration of the leak detector C 300
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