Abstract
The outcomes of the CIPM MRA are the internationally recognized Calibration and Measurement Capabilities (CMCs) of the participants of comparisons. Main results of the participating laboratories of National Metrology Institutes (NMIs) and Designated Institutes (DIs), measuring the same power in a framework EURAMET.EM-K5.1 and COOMET.EM-K5 key comparisons (KCs), are presented. 12 NMIs/DIs took part in EURAMET.EM-K5.1 KC. 13 NMIs/DIs participated in COOMET.EM-K5 KC. UME (Turkey), UMTS (Ukraine) and SMU (Slovakia) were joint participants in EURAMET.EM-K5.1 and COOMET.EM-K5 KCs.For Global Metrological Traceability, it is advisable to use a methodology for linking the results of Constative Committees (CCs) KC to Regional Metrology Organizations (RMOs) KC. The linking procedure of RMOs КC with respect to reference value of CC KC is described. Linked results of EURAMET.EM-K5.1 and COOMET.EM-K5 KCs for power are presented. Special conclusions on the results of UME, UMTS and SMU who participated in both KCs are presented.
Highlights
The Mutual Recognition Arrangement (MRA) of the International Committee for Weights and Measures (CIPM) [1] plays an important role for Global Metrological Traceability (GMT) [2]
degree of equivalence (DoE) is obtained as the deviation of its measurement result from the Key comparisons (KCs) reference value (RV), together with the uncertainty associated with this deviation according to the CIPM MRA
15 National Metrology Institutes (NMIs)/ Designated Institutes (DIs) participated in this KC, which are the members of five Regional Metrology Organizations (RMOs): European Association of National Metrology Institutes (EURAMET), APMP, COOMET, SIM and AFRIMET
Summary
The Mutual Recognition Arrangement (MRA) of the International Committee for Weights and Measures (CIPM) [1] plays an important role for Global Metrological Traceability (GMT) [2]. Key comparisons (KCs) of the national measurement standards in different fields of measurements are the special comparisons of National Metrology Institutes (NMIs) and Designated Institutes (DIs) in the frame of Constative Committee (CC) of CIPM and Regional Metrology Organizations (RMOs). Results of KCs CC and KCs RMOs are published in special Key Comparison Database (KCDB) of the International Bureau of Weights and Measures (BIPM) [7]. Establishment of GMT is carried out in accordance with procedures through international comparisons of the national measurement standards of NMIs or DIs. For GMT, it is advisable to use a methodology for linking the results of CC KC to RMO KC and RMO KC to other analogical RMO KC [11, 12].
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