NF EN ISO 16664
Gas analysis - Handling of calibration gases and gas mixtures - Guidelines
ISO 16664:2004 describes factors that may influence the composition of pure gases and homogeneous gas mixtures used for calibration purposes. ISO 16664:2004 only applies to gases or gas mixtures that are within the "utilization period", and it pays special attention tostorage of calibration gas cylinders;calibration gas withdrawal from cylinders;transfer of calibration gas from cylinders to the point of calibration.ISO 16664:2004 also outlines a method of assessing the stability for a gas mixture, and takes into account the gas composition uncertainty given on the certificate and the users measurement uncertainty.
ISO 16664:2004 describes factors that may influence the composition of pure gases and homogeneous gas mixtures used for calibration purposes. ISO 16664:2004 only applies to gases or gas mixtures that are within the "utilization period", and it pays special attention to
- storage of calibration gas cylinders;
- calibration gas withdrawal from cylinders;
- transfer of calibration gas from cylinders to the point of calibration.
ISO 16664:2004 also outlines a method of assessing the stability for a gas mixture, and takes into account the gas composition uncertainty given on the certificate and the users measurement uncertainty.
ISO 16664:2017 describes factors that may influence the composition of pure gases and homogeneous gas mixtures used for calibration purposes. This document only applies to gases or gas mixtures that are within the "utilization period". It provides the following guidelines for the handling and use of calibration gas mixtures: - storage of calibration gas cylinders; - calibration gas withdrawal from cylinders; - transfer of calibration gas from cylinders to the point of calibration. It also outlines a method of assessing the stability of a gas mixture, taking into account the gas composition uncertainty given on the certificate and the user's measurement uncertainty.
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Termes et définitions1
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3 Transport et stockage4
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3.1 Remarques générales4
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3.2 Basse température4
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3.3 Température élevée4
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3.4 Eau4
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3.5 Stockage et manutention4
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4 Mode de soutirage5
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4.1 Généralités5
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4.2 Pression minimale d'utilisation5
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4.3 Température5
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4.4 Réduction de pression et débit5
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4.5 Remplacement, changement de position des bouteilles6
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5 Système de transfert6
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5.1 Mode opératoire relatif à la purge6
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5.2 Considérations relatives à la conception et à la construction des lignes de transfert de gaz7
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6 Stabilité13
- Annexe A (informative) Vérification par l'utilisateur final de la stabilité des mélanges de gaz pour étalonnage14
- Bibliographie17
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