Report on EURAMET supplementary comparison on measurement of a 1 mm stage micrometer

The metrological equivalence of national measurement standards and of calibration certificates issued by national metrology institutes is established by a set of key and supplementary comparisons chosen and organized by the Consultative Committees of the CIPM or by the regional metrology organizations in collaboration with the Consultative Committees. At its meeting in Espoo, 16-17 October 2017, the EURAMET Technical Committee for Length (TC-L) decided to carry out a supplementary comparison on stage micrometer measurements, named EURAMET.L-S29, with BEV (Bundesamt für Eich- und Vermessungswesen) as the pilot laboratory. The results of this international comparison will support the Calibration and Measurement Capabilities (CMCs) declared by the NMIs in the CIPM Mutual Recognition Arrangement (MRA). The comparison was registered in November 2019 at EURAMET and January 2020 at KCDB. Artefact circulation started in August 2020 and was completed in September 2022.