ASTM-E493 › Standard Practice for Leaks Using the Mass Spectrometer Leak Detector in the Inside-Out Testing Mode
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Scope
1.1 These test methods cover procedures for testing devices that are sealed prior to testing, such as semiconductors, hermetically enclosed relays, pyrotechnic devices, etc., for leakage through the walls of the enclosure. They may be used with various degrees of sensitivity (depending on the internal volume, the strength of the enclosure, the time available for preparation of test, and on the sorption characteristics of the enclosure material for helium). In general practice the sensitivity limits are from 4.4 X 10 -15 to 4.4 X 10 -11 moles/s (10 -9 standard cm /s to 10 -5 standard cm /s at 0°C) for helium, although these limits may be exceeded by several decades in either direction in some circumstances.
1.2 Two test methods are described:
1.2.1 Test Method A -Test part preparation by bombing.
1.2.2 Test Method B -Test part preparation by prefilling.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywords
bell jar leak test; bomb mass spectrometer leak test; helium leak test; helium leak testing; leak testing; mass spectrometer leak testing; sealed object mass spectrometer leak test; ICS Number Code 19.100 (Non-destructive testing)
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03.03 (Nondestructive Testing)
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Document Number
ASTM-E0493_E0493M-11R22
Revision Level
2011 R22 EDITION
Status
Current
Modification Type
Revision
Publication Date
July 6, 2022
Document Type
Test Method
Page Count
3 pages
Committee Number
E07.08