ASTM E2551 - 13

    Standard Test Method for Humidity Calibration (or Conformation) of Humidity Generators for Use with Thermogravimetric Analyzers

    Active Standard ASTM E2551 | Developed by Subcommittee: E37.10

    Book of Standards Volume: 14.02


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    ASTM E2551

    Significance and Use

    5.1 This test method calibrates or demonstrates conformity of the humidity level in a purge gas generated by a humidity generator at a fixed temperature. Such calibration or demonstration of conformity may be required by quality initiatives.

    5.2 Conformance demonstrates that the humidified purge gas is within some established limits.

    5.3 Calibration provides an offset and or slope value that may be used for establishing the relative humidity scale of the apparatus.

    1. Scope

    1.1 This test method describes the humidity calibration (or conformance) of humidity generators for use with thermogravimetric analyzers and other thermal analysis apparatus. The humidity range covered is 5 to 95 % relative humidity (% RH) and the temperature range is 0 to 80°C.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.3 There are no ISO equivalents to this standard.

    1.4 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.


    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

    D1193 Specification for Reagent Water

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E473 Terminology Relating to Thermal Analysis and Rheology

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E1142 Terminology Relating to Thermophysical Properties

    E1582 Practice for Calibration of Temperature Scale for Thermogravimetry


    ICS Code

    ICS Number Code 71.040.40 (Chemical analysis)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/E2551-13

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