World-wide recognition of National Measurement Standards: ten years of the CIPM MRA [Recalibration]

The information in this report on CIPM MRA has been published in many places and is open access on the BIPM web site. The purpose of the CIPM MRA was to formalize the previous international comparisons of national standards that had traditionally been carried out by the major NMIs of the world and to extend the recognition gained for their national standards to cover also their calibration and measurement certificates. Ten years later, the CIPM MRA covered some 200 institutes in 72 countries as well as two international organizations, the International Atomic Energy Agency and the Laboratories of the European Union at Geel, Belgium. The results of the key comparisons and the calibrations services meeting the requirements of the quality systems are put on a public database maintained by the BIPM known as the BIPM Key Comparison Database (KCDB).