描述
The part is put into a chamber where vacuum is created. The part is then pressurized with helium and the helium leakage is measured through a mass spectrometer.
1. The test is objective, since does not depend on the operator.
2. Detectable leak range goes from 5.0 x 10-3 mbar*L/s to 5.0 x 10-8 mbar*L/s.
3. This method is used in automatic systems to test components as evaporators, condensers, tubes, hoses, pipes, airbags, canisters, fuel tanks, thermostatic valves.
