5. Example of a reference laboratory

In this chapter, we present, for a few selected electrical quantities, the reference devices required, the connection to the calibration chain, the measurement ranges and the corresponding uncertainties.

The uncertainties quoted for the selected quantities are determined by type A methods (evaluation by statistical methods), and type B methods. They take into account many factors which determine the accuracy and reliability of these calibrations. These factors are linked, for example, to the standards which establish traceability, to the calibrated object itself and its drift, to the facilities and ambient conditions, to the methods applied, to the characteristics of the equipment used, to the operators and their general knowledge of the experiment, etc. All these factors must be taken into account when determining the accuracy and reliability of calibrations. All...

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Example of a reference laboratory

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Bibliography

(1) - TAYLOR (B.N.) - Guide for the Use of the International System of Units (SI) - NIST Special Publication 811 (1995).
(2) - BESSASON (B.) et al - Vibration criteria for metrology laboratories - Meas. Sci. Technol. 10, 1009-1014 (1999)....

Standards and norms

Installations électriques à basse tension. Règles. - NF C 15-100 - 1991
Enceintes et conditions d'essai. Températures préférentielles d'essai. - X 15-050 - 1991
Métrologie. La fonction métrologique dans l'entreprise. - NF X 07-010 - 1986
Atmosphères normales de conditionnement et/ou d'essai. Spécifications. - ISO 554 - 1976
Conception des Installations électriques. - EN 50160 - 2000

Regulations

European Electromagnetic Compatibility Directive 89/336/EEC.

Directives concerning personal safety: Low Voltage 73/23/EEC and Machinery 93/44/EC and 93/68/EC.

Mutual recognition of national measurement standards and of calibration and measurement certificates issued by national metrology institutes Paris, October 14, 1999. Technical supplement revised in October 2003,...