Inficon Pernicka 700H CHLD, Translation Of The Original Operating Instructions

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1 | About these instructions INFICON
8 / 100 Pernicka-700H-CHLD-Operating-instructions-jin76aen1-04-(1911)
NOTICE
Hazardous situation resulting in damage to property or the environment
1.4 Definition of terms
Use of gas types in the device
The device is a helium leak detector. If you want to use a forming gas instead of
helium to detect the hydrogen contained therein, the information for helium also
applies to hydrogen.
Automatic tuning / mass setting
This function adjusts the mass spectrometer so that a maximum leak rate indicator is
achieved. In order to detect a maximum ion current with the ion detector, the control
computer adjusts the voltage for accelerating the ions within the selected mass range
accordingly.
During each calibration, the mass is adjusted automatically.
Operating mode
The leak detector distinguishes between the operating modes "Standby",
"Measurement" and "Regeneration".
The device must be in the operating mode "Standby", before a measurement can
begin. If the measurement process is aborted, the device is also in the operating mode
"Standby".
With the operating mode "Measurement" tracer gas, which escapes from the test
object is measured using a mass spectrometer (CHLD-Sensor). The result is shown
as a helium raw signal (current in [A] unit) with the gross leak test and with the fine
leak test as a leak rate in the unit [mbar l/s] or [atm cc/s].
In the operating mode "Regeneration", all gases except helium and hydrogen, are
frozen out with the cryogenic pump. The frozen gases are separated in the ice state
on the inner surface of the cryogenic pump. At regular intervals, these separated
gases must be evaporated and removed from the system.
Forming gas
Forming gas is a collective term for gas mixtures of nitrogen and hydrogen.
Gross leak test
Gross leak test refers to a phase of the measuring procedure, in which the device
checks the test object for gross leaks.