MEMBRANE LEAK TESTING METHOD AND ASSOCIATED LEAK DETECTION DEVICE

摘要

The invention relates to a method for leak testing a tank membrane, comprising an intermediate isolation space (87) of the detection chamber (61), the leak detection device (54) further comprising a vacuum pump (57) connected to the detection chamber (61) and a measurement apparatus connected to the detection chamber (61) and configured to measure a variable that is representative of a quantity of at least one test gas present in the gaseous atmospheric phase of the external space, wherein a step of verifying that an isolation threshold Si is attained in the intermediate isolation space (87) comprising a so-called neutral gas, different from the test gas is performed, the attainment of this insulation threshold Si being a necessary condition for the triggering the leak testing of the membrane.