Method and apparatus for leak testing

Details Method and apparatus for leak testing Method and apparatus for leak testing

G - Physics

01

M

G01M 3/26 (2006.01) G01M 3/32 (2006.01)

Patent

CA 2053232

2053232 9114164 PCTABS00007 A method of and apparatus for testing the chamber of a test part (P) for leaks in which the chamber is filled with gas under pressure and the differential pressure drop over a predetermined interval of time is determined. The temperature of the part being tested is determined, and a storage table (60) of correction values corresponding to the estimated differential pressure drop attributable to the temperature of the part is provided. The correction value for the temperature of the part is selected by a correction value selector (84) from the storage table and substracted from the measured differential pressure drop by a calculator (80) to obtain a corrected differential pressure drop. If the corrected differential pressure drop is within a range below a predetermined amount, a fraction of it is summed back to the storage table to adjust the selected correction value.

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