GB 03317 - Edition 05 - May 12
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C 403
Spectro Menu
Tracer gas selection
Filament management
(switching on/selection)
Calibrated leak setting
Purpose
The tracer gas is the searched gas during a test.
3 gas are proposed: Helium 4, Helium 3 and Hydrogen.
Tracer gas
Hydrogen background Background is much higher in hydrogen.
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 function 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.
The leak detector should be calibrated with a calibrated leak of the
tracer gas used.
It is the global performance indicator of the analyzer cell sensitivity.
Factory departure : Fil. Margin = 100 %
Normal wear on some cell components will reduce this value in the
time, without deteriorate the detector measurement accuracy.
Test with hydrogen
Calibration
Fil. Margin
adixen Vacuum Products - ASM 310 Operating instructions
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