BS ISO 14167:2018
$142.49
Gas analysis. General quality aspects and metrological traceability of calibration gas mixtures
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 28 |
This document provides requirements and guidelines on the necessary quality assurance required to produce calibration gas mixtures that are demonstrably stable and comparable. It shows that this is achieved by demonstrating that the composition of the calibration gas mixture is metrologically traceable to the SI.
This document shows that calibration gas mixtures can be prepared according to methods that have measurements that are completely described in SI units. It describes procedures for verifying that the composition of such gas mixtures is correct within the stated measurement uncertainty. Guidance is given as to how to conduct the evaluation of uncertainty in these procedures.
This document also shows how a calibration gas mixture with unknown composition can be calibrated by reference to traceable standard gas mixtures.
This document covers the commonalities and differences of quality management schemes in use by producers of calibration gas mixtures, most notably those described in ISO/IEC 17025 and ISO 17034. These systems lead to gas mixtures with different characteristics, and this document explains these differences and their implications.
Calibration gas mixtures, as prepared and certified for composition in accordance with this document, are used for the calibration of equipment, the performance evaluation of methods, measurement procedures and equipment.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions 4 Symbols |
| 9 | 5 Preparation of gas mixtures 5.1 Static and dynamic methods |
| 10 | 5.2 Purity of parent gases 5.3 Use of gas mixtures as parent gases 5.4 Gravimetric methods |
| 12 | 5.5 Volumetric methods |
| 13 | 5.6 Hybrid methods 6 Composition of calibration gas mixtures by comparison 6.1 General |
| 14 | 6.2 Multipoint calibration 6.3 Simple calibration approaches |
| 15 | 7 Verification of composition of gas mixtures 7.1 Objectives 7.2 Statistical tests for consistency and uncertainty due to verification |
| 16 | 7.3 Maintaining measurement standards |
| 17 | 7.4 Assessing gas mixture stability 7.5 Initial losses, chemical reactions and other effects |
| 18 | 8 Metrological traceability and quality assurance 8.1 Preparation methods |
| 19 | 8.2 Comparison methods 8.3 Conversion of composition data 8.4 Transfer of metrological traceability |
| 22 | 8.5 Quality assurance and quality control 9 Evaluating measurement uncertainty 9.1 General |
| 23 | 9.2 Sources of uncertainty 9.3 Certificates under ISO/IEC 17025 and ISO 17034 |
| 25 | Annex A (informative) Hierarchy |
| 27 | Bibliography |
