Reference number ISO 20486:2017 © ISO 2024 International Standard ISO 20486:2017 Non-destructive testing — Leak testing — Calibration of reference leaks for gases Edition12017-12 ISO 20486:2017 68191 Published (Edition 1, 2017) ISO 20486:2017 ISO 20486:201768191 CHF 151 Convert Swiss francs (CHF) to your currency Abstract ISO 20486:2017 specifies the calibration of those leaks that are used for the adjustment of leak detectors for the determination of leakage rate in everyday use. One type of calibration method is a comparison with a reference leak. In this way, the leaks used for routine use become traceable to a primary standard. In other calibration methods, the value of vapour pressure was measured directly or calculated over a known volume.The comparison procedures are preferably applicable to helium leaks, because this test gas can be selectively measured by a mass spectrometer leak detector (MSLD) (the definition of MSLD is given in ISO 20484).Calibration by comparison (see meth...
