Measuring and testing – With fluid pressure – Leakage
Reexamination Certificate
2005-09-20
2005-09-20
Garber, Charles (Department: 2856)
Measuring and testing
With fluid pressure
Leakage
Reexamination Certificate
active
06945092
ABSTRACT:
The invention relates to a method for operating a film leak indicator (1) comprising two films (5, 6), which are each tensioned inside a frame (3, 4) and which delimit a testing space (80) when a test piece (79) is introduced. In addition, said film leak indicator is equipped with two vacuum pumps (13, 20). According to the invention, the testing space (80) is firstly evacuated and the film leak indicator is switched over to a leak search mode after the evacuation is completed. In order to prevent the search for leaks from being impaired by fluctuating helium concentrations in the ambient air, the invention provides that, before starting the leak search process, the helium concentration of the ambient air is measured and this measurement is taken into account during subsequent leakage measurements.
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Garber Charles
Inficon GmbH
Wall Marjama & Bilinski LLP
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