Leak testing of hollow bodies

摘要

A test gas consisting of different gases is used to subject the hollow body (1) to a difference press., so that in the event of a leak the gas can flow to the low press. side. Part of the gas is used as a test gas and another part as a ventilation gas. Individual components of the test gas are analysed on the low press. side. Air can be used as the test gas. Alternatively, nitrogen, oxygen, carbon dioxide or other constituents of air can be used as the test gas. A mass spectrometer can be used to analyse the gas. Individual mass peaks and combinations of different molecule masses and their ratios are evaluated.