ASTM E296 - 70(2010)

    Standard Practice for Ionization Gage Application to Space Simulators

    Active Standard ASTM E296 | Developed by Subcommittee: E21.04

    Book of Standards Volume: 15.03


      Format Pages Price  
    PDF 14 $49.00   ADD TO CART
    Hardcopy (shipping and handling) 14 $49.00   ADD TO CART


    Abstract

    This practice provides application criteria, definitions, and supplemental information to assist the user in obtaining meaningful vacuum ionization gage measurements in space-simulation facilities. Acceptable vacuum-measuring equipment shall consist of those items in which performance is compatible with obtaining meaningful measurements. The gage mounting, gage orientation, gage operational error, and gage correction for gas composition are presented in details. The gas composition determination, operating criteria, heavy molecular weight contamination effects, apparent X-ray limit for hot-cathode gages, and cold cathode gages are presented in details.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This practice provides application criteria, definitions, and supplemental information to assist the user in obtaining meaningful vacuum ionization gage measurements below 101 N/m2 (103 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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E297 Test Method for Calibrating Ionization Vacuum Gage Tubes


    ICS Code

    ICS Number Code 49.140 (Space systems and operations)

    UNSPSC Code

    UNSPSC Code 25191601(Spacecraft flight simulators)


    DOI: 10.1520/E0296-70R10

    ASTM International is a member of CrossRef.

    ASTM E296

    Citing ASTM Standards
    Back to Top