Method for operating a film leak indicator and a corresponding film leak indicator for carrying out said method
US6945092B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 2002 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Jun 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/229
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.