• BS ISO 6145-7 : 2009

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    GAS ANALYSIS - PREPARATION OF CALIBRATION GAS MIXTURES USING DYNAMIC VOLUMETRIC METHODS - PART 7: THERMAL MASS-FLOW CONTROLLERS

    Available format(s):  Hardcopy, PDF

    Superseded date:  30-06-2011

    Language(s):  English

    Published date:  01-01-2009

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Principle
    5 Set-up
      5.1 General
      5.2 Thermal mass-flow controller using a constant
          current supply
      5.3 Thermal mass-flow controller under constant
          temperature control
    6 Preparation of gas mixtures
      6.1 Description of the experimental procedure
      6.2 Area of validity
      6.3 Operating conditions
    7 Calculations
      7.1 Volume fraction
      7.2 Sources of uncertainty
      7.3 Uncertainty of measurement
    Annex A (informative) - Pre-mixed gases for preparation
             of mixtures of high dilution
    Annex B (informative) - Practical hints
    Annex C (informative) - Calculation of uncertainties
    Bibliography

    Abstract - (Show below) - (Hide below)

    Describes a method for continuous production of calibration gas mixtures, containing two or more components, from pure gases or other gas mixtures by use of commercially available thermal mass-flow controllers.

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    Committee PTI/15
    Development Note Supersedes 97/120740 DC. (06/2005) Supersedes 07/30171422 DC. (04/2009) Renumbered and superseded by BS EN ISO 6145-7. (06/2011)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 14511:2001 Measurement of fluid flow in closed conduits Thermal mass flowmeters
    ISO 6143:2001 Gas analysis — Comparison methods for determining and checking the composition of calibration gas mixtures
    ISO 6142:2001 Gas analysis Preparation of calibration gas mixtures Gravimetric method
    ISO 7504:2015 Gas analysis Vocabulary
    ISO 6145-1:2003 Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 1: Methods of calibration
    ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
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