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4. Recognition for reference materials
Where external calibration services are used, traceability of measurements must be ensured by the calibration services of laboratories able to demonstrate their competence and suitability in terms of measurement and traceability. Calibration certificates issued by these laboratories must contain the measurement results, including the uncertainty of measurement and/or a declaration of conformity to an identified metrological specification. A certificate bearing the symbol of an ILAC MRA signatory accreditor therefore meets this requirement.
It is, however, more difficult to obtain this declaration from an external service provider, unless the user's acceptance criteria for the equipment in question are provided. Many users are reluctant to pass on these documents because of the confidential information that could be extracted from them. Compliance with these specifications...
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Recognition for reference materials
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Bibliography
Standards
- International Vocabulary of Metrology — Fundamental and general concepts and associated terms (VIM) - JCGM. - VIM -
- Conformity assessment — Vocabulary and general principles. - ISO/CEI 17000 -
- Guide pratique pour la validation, le contrôle qualité, et l'estimation de l'incertitude d'une méthode d'analyse œnologique alternative. - Résolution OIV/Oeno -
- Quality management systems — Requirements - ISO 9001...
Directory
Producers of reference materials
IAEA (International Atomic Energy Agency – Agence Internationale pour l'Energie Atomique) http://www.iaea.org
BAM (Bundesanstalt für Materialforschung und -prüfung) – Germany http://www.bam.de
IRMM (Institute...
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