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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
GAS ANALYSIS - PREPARATION OF CALIBRATION GAS MIXTURES USING DYNAMIC VOLUMETRIC METHODS - PART 7: THERMAL MASS-FLOW CONTROLLERS
Hardcopy , PDF
English
01-01-2009
30-06-2011
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
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.
| Committee |
PTI/15
|
| DevelopmentNote |
Supersedes 97/120740 DC. (06/2005) Supersedes 07/30171422 DC. (04/2009) Renumbered and superseded by BS EN ISO 6145-7. (06/2011)
|
| DocumentType |
Standard
|
| Pages |
24
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| ISO 6145-7:2009 | Identical |
| 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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