Bilateral comparison of 10 pF and 100 pF standards (ongoing BIPM key comparisons BIPM.EM-K14.a and 14.b) between the NMIM (Malaysia) and the BIPM

Abstract

Main textThis report presents the results of a bilateral comparison between the NMIM, Malaysia, and the BIPM, which was carried out using two 10 pF and two 100 pF travelling standards belonging to the BIPM, following an "A-B-A" pattern. The comparison at 10 pF forms part of the ongoing BIPM key comparison BIPM.EM-K14.a and that at 100 pF of the ongoing BIPM key comparison BIPM.EM-K14.b, where BIPM is the pilot laboratory for both comparisons.The standards were measured during a total time of 19 weeks, from February 2022 to June 2022. The measurand of this comparison was the two terminal-pair capacitance of the travelling capacitors at frequencies of 1000 Hz and 1592 Hz, and a measuring voltage of 15 V (rms) for the 10 pF standards and 10 V for the 100 pF standards.The results from the NMIM and the BIPM agree within a difference smaller than the relative expanded uncertainty of the comparison, which is dominated by the NMIM extrapolation of the BIPM calibrations, and to the use of a digital capacitance bridge to support the surveillance of the standards through periodical intermediate checks.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 https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).