Patent ID: 9651444
Date: 2017-05-16
CPC Classifications: G01M

Claim:
1. A method of cumulative helium mass spectrometric combination test by using argon gas as gross-leak tracer gas, including gross-leak test and fine-leak test, wherein a helium-argon prefilling method is selected for a primary sealability test, wherein a component under test is prefilled with a gas mixture of nitrogen, helium and argon and then sealed, wherein a ratio of a partial pressure of the argon gas to a total pressure is 0.934%; and a helium-argon pressuring method is selected for a secondary sealability test, wherein a component under test is pressured with a gas mixture of helium and argon, wherein the partial pressure of the argon gas is a partial pressure of argon gas in the air P for the helium-argon prefilling method employed for the primary sealability test, when the rigour grade T for the fixed scheme of helium-argon prefilling method, on a precondition that the criterion for argon measured leak rate R for the helium-argon pressuring method, R