I.S. EN ISO 6145-6:2017
Current
The latest, up-to-date edition.
GAS ANALYSIS - PREPARATION OF CALIBRATION GAS MIXTURES USING DYNAMIC METHODS - PART 6: CRITICAL FLOW ORIFICES (ISO 6145-6:2017)
Hardcopy , PDF
English
01-01-2017
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National Foreword
European foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Calculation of mass flow rate and volume flow rate
7 Calculation of amount of substance fraction and
volume fraction and associated uncertainty
evaluation
8 Application to the preparation of gas mixtures
9 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
Defines a method for the dynamic preparation of calibration gas mixtures containing at least two gases (usually one of them is a complementary gas) from pure gases or gas pre-mixtures using critical flow orifices systems.
| DocumentType |
Standard
|
| Pages |
42
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| ISO 6145-6:2017 | Identical |
| EN ISO 6145-6:2017 | Identical |
| ISO 12963:2017 | Gas analysis — Comparison methods for the determination of the composition of gas mixtures based on one- and two-point calibration |
| ISO 9300:2005 | Measurement of gas flow by means of critical flow Venturi nozzles |
| ISO 16664:2017 | Gas analysis — Handling of calibration gases and gas mixtures — Guidelines |
| ISO 6143:2001 | Gas analysis — Comparison methods for determining and checking the composition of calibration gas mixtures |
| ISO 19229:2015 | Gas analysis Purity analysis and the treatment of purity data |
| ISO 14912:2003 | Gas analysis — Conversion of gas mixture composition data |
| VDI 3490 Blatt 16:1994-10 | Measurement of gases - Calibration gas mixtures - Dynamic preparation with critical orifice systems |
| ISO 7504:2015 | Gas analysis Vocabulary |
| 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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