Final report on the supplementary comparison EURAMET.EM-S26: inductance measurements of 100 mH at 1 kHz (EURAMET project 816)

Abstract

Within the framework of EURAMET, a comparison has been organized of measurements of self-inductance at 100 mH and 1 kHz. The comparison is identified as EUROMET.EM-S26. Two 100 mH inductance standards, encased in a thermostatic controlled enclosure, were circulated among the participants. The results from 10 out of 16 participants are in agreement with the reference values. A majority of the results agrees within ±50 µH/H. The participants reported four different methods to realize the traceability of the unit of inductance. The results from these different methods are in good agreement within the reported uncertainties. The results of this comparison have been linked to the results of the comparison EUROMET.EM-S20. The organization of this comparison has been a successful exercise of sharing the workload among four different institutes and can be an example to future comparisons.Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by EUROMET, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).

Interlaboratory comparisons of the calibration results of signal generator

“…Similar approaches to the establishment of long-term CS drift, which are presented in [16][17][18][19], can also be used for IC. So, this task was entrusted to the IC RL.…”

“…Some works [14][15][16][17][18][19] are devoted to the study of the features of IC. In particular, [14] considers approaches to improving the methods for measuring and estimating the uncertainty of the laboratories participating in IC for active power measurement, and [15] evaluates the IC data of laboratories with further calculation of the uncertainty of measurement results.…”

“…However, the paper [14] does not substantiate the advantage of choosing the z-index criterion in comparison with other statistical performance criteria. In [16][17][18][19], approaches to establishing a long-term drift of the comparison standard for international comparisons of national standards was presented. This approach can also be applied to IC, determining the long-term CS drift.…”

Dual Josephson impedance bridge: towards a universal bridge for impedance metrology

“…The calibration of 100 mH and 1 H inductance standards were performed at the frequency of 1 kHz with both the DJIB and the synchronous sampling system [ 55 ], routinely used at METAS for the realization of the inductance scale [ 6 ]. Both the series resistance and the deviation of the series inductance from the nominal value are shown in Fig.…”

Linking results of key and supplementary comparisons of regional metrology organization for electrical power

“…GUM did not use the same measurement set-up in both comparisons. Therefore, it was decided to use only the PTB results for link determine [4].…”