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Rapport BIPM-2007/04
A user's guide to the information in the key comparison database
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Wallard A.J., Thomas C.


The launch of the Mutual Recognition Arrangement by the International Committee for Weights and Measures (CIPM MRA) created a process within which calibration and measurement certificates from National Metrology Institutes (NMIs) which are signatories could be recognized and accepted worldwide. This process has become of great interest to regulators and accreditors. More recently, it has attracted the attention of international companies who wish to take advantage of the mutual recognition offered by these certificates by taking traceability to the International System of Units (the SI) through local NMIs. This latter aspect of the use to which the Key Comparison Data Base (KCDB) can be put has recently been made more straightforward as the result of a new search engine installed by the BIPM. The paper describes the current situation and shows how to access the relevant data. The paper will be complemented by a practical demonstration of the KCDB in the exhibition hall of the conference.

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