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5. Glossary
Traçabilité métrologique; metrological traceability
The property of a measurement result that it can be related to a reference through an unbroken, documented chain of calibrations, each of which contributes to the uncertainty of measurement.
Calibration
Operation which, under specified conditions, in a first step establishes a relationship between the values and associated measurement uncertainties provided by standards and the corresponding indications with associated uncertainties, then in a second step uses this information to establish a relationship for obtaining a measurement result from an indication.
Measurement uncertainty
Non-negative parameter characterizing the dispersion of values assigned to a measurand, based on the information used.
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Bibliography
- (1) - DC GRIDS - Réseaux CC 20NRM03. - (2023). Disponible en ligne https://dc-grids.nl/
- (2) - IEC JWG 9 LVDC distribution. - Disponible en ligne
Standards and norms
- Instrument transformers – Part 1: General requirements. - NF EN 61869-1 - Décembre 2009
- Instrument transformers – Part 2: Additional requirements for current transformers. - NF EN 61869-2 - Mai 2013
- High-intensity testing techniques – Definitions and requirements for test currents and measuring systems. - NF EN 62475 - Mars 2011
Websites
BIPM – The International System of Units – 9th edition. Appendix 2 – Practical realization of the main units
https://www.bipm.org/fr/publications/si-brochure
COFRAC – French Accreditation Committee
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