Main Results of GULFMET.EM-S4 Supplementary Comparison of Inductance for 10 and 100 mH at 1 kHz

Oleh Velychko,Sergiy Shevkun,Tetyana Gordiyenko

doi:10.24027/2306-7039.3.2019.182209

Oleh Velychko, Sergiy Shevkun + Show 1 more

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A Supplementary Comparison of Regional Metrology Organizations (RMOs) is a comparison, usually carried out by an RMO to meet specific metrological needs not covered by Key Comparison of Consultative Committee of the International Committee for Weights and Measures (CIPM) or RMOs. The outcomes of the CIPM Mutual Recognition Arrangement (MRA) are the internationally recognized Calibration and Measurement Capabilities (CMCs) of the participants of comparisons and CMCs of National Metrology Institutes published in Key Comparison Database (KCDB) of the International Bureau for Weights and Measures (BIPM).Main results of the participating laboratories which have been measuring the same inductance travelling standard for 10 and 100 mH at 1 kHz in a framework of GULFMET.EM-S4 Supplementary Comparison of Inductance are presented. The paper describes the evaluation of drift effect of the travelling standard and Reference Value of a Supplement Comparison. Degrees of Equivalence and Expanded Uncertainties of NMI participants are determined.En number was calculated for each NMI participating in GULFMET.EM-S4 comparison with the aim of determining data consistency. Linked results of COOMET.EM-S14 and GULFMET.EM-S4 supplementary comparisons for inductance were presented. Obtained results of both comparisons have good data consistency for all NMI participants.

Highlights

Key comparisons (KC) are the special compa risons for National Metrology Institutes (NMIs) in a frame of Consultative Committee (CC) and Regional Metrology Organizations (RMOs) around the world, which are carried out within the framework of the International Committee for Weights and Measures (CIPM) of Mutual Recognition Arrangement (MRA) [1, 2]
The degree of equivalence (DoE) of a laboratory is obtained as the deviation of its measurement result from the KC reference value (RV), together with the uncertainty associated with this deviation according to the CIPM MRA [6]
[18] supplementary comparison (SC) can be linked in terms of RVS14 (100 mH, 1 kHz)

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Introduction

Key comparisons (KC) are the special compa risons for National Metrology Institutes (NMIs) in a frame of Consultative Committee (CC) and Regional Metrology Organizations (RMOs) around the world, which are carried out within the framework of the International Committee for Weights and Measures (CIPM) of Mutual Recognition Arrangement (MRA) [1, 2]. The main purpose of KC is the determination of the equivalence between laboratories of different NMIs. A supplementary comparison (SC) of RMO is a comparison, usually carried out by a RMO to meet specific metrological needs not covered by KC of CC or RMOs. The CIPM MRA describes in general how the data of KC should be evaluated but it does not provide enough specifics to define an unambiguous analysis. The degree of equivalence (DoE) of a laboratory is obtained as the deviation of its measurement result from the KC reference value (RV), together with the uncertainty associated with this deviation according to the CIPM MRA [6]

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