| 摘要 |
<p>The invention relates to a method for operating a film leak detector (1). Said detector has two films (5, 6) inserted in a frame (3, 4) which define a test chamber (80) when a test piece (79) is placed therein. Said detector is also provided with two vacuum pumps (13, 30). According to the inventive method, the test chamber (80) is first evacuated and after said evacuation, the detector is switched to the leak detecting mode. To prevent contamination with test gas or dirt, only one (13) of the two vacuum pumps is used during the first phase of evacuation of the test chamber (80) and only the second vacuum pump (30) is used during the leak detection mode.</p> |
