ASTM E 296 : 1970 : R1999

Name: ASTM E 296 : 1970 : R1999
Brand: ASTM
Price: 83.00 USD

Superseded

View Superseded by

Standard Practice for Ionization Gage Application to Space Simulators

Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

10-10-1999

Publisher

American Society for Testing and Materials

CONTAINED IN VOL. 15.03, 2015 Describes application criteria, definitions, and supplemental information to assist the user in obtaining meaningful vacuum ionization gage measurements below 10[-1] N/m[2] (10[-3] torr) in space-simulation facilities.

1.1 The purpose of this practice is to provide application criteria, definitions, and supplemental information to assist the user in obtaining meaningful vacuum ionization gage measurements below 10 N/m (10 torr) in space-simulation facilities. Since a variety of influences can alter observed vacuum measurements, means of identifying and assessing potential problem areas receive considerable attention. This practice must be considered informational, for it is impossible to specify a means of applying the vacuum-measuring equipment to guarantee accuracy of the observed vacuum measurement. Therefore, the user's judgment is essential so that if a problem area is identified, suitable steps can be taken to either minimize the effect, correct the observed readings as appropriate, or note the possible error in the observation.

1.2 While much of the discussion is concerned with the application of hot-cathode ionization gages, no exclusion is made of cold-cathode designs. Since a great deal more experience with hot-cathode gages is available and hot-cathode devices are used in the majority of applications, the present emphasis is fully warranted.

1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.

Committee	E 21
DocumentType	Standard Practice
Pages	13
ProductNote	Reconfirmed 1999
PublisherName	American Society for Testing and Materials
Status	Superseded
SupersededBy	ASTM E 296 : 1970 : R2004