16/30266428 DC : DRAFT MAR 2016
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
BS EN ISO 6145-6 - GAS ANALYSIS - PREPARATION OF CALIBRATION GAS MIXTURES USING DYNAMIC METHODS - PART 6: CRITICAL FLOW ORIFICES
30-09-2017
18-04-2016
Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Principle
5 Calculation of mass flow rate and
volume flow rate
6 Calculation of amount of substance fraction
and volume fraction and associated uncertainty
evaluation
7 Application to the preparation of gas mixtures
8 Calibration and verification
Annex A (informative) - Example of calculation of
isentropic coefficient, viscosity and critical
flow coefficient
Annex B (informative) - Calculation of mass and volume
flow rates under real conditions
Annex C (informative) - Example of flow calculation
for toroidal critical flow orifices under ideal and
real conditions
Annex D (informative) - Calculation of mass flow
rate using flow calibration with pure nitrogen:
examples
Bibliography
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