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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
Hardcopy , PDF
06-30-2011
English
01-01-2009
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
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