Final report on the APMP comparison of capacitance at 10 pF: APMP.EM-K4.1

Abstract

A comparison of capacitance at 10 pF was conducted between thirteen participating laboratories from the Asia-Pacific region. Measurements were made between 2004 and 2006. The behaviour of the travelling artefact was consistent with a steady linear drift at a rate of approximately 0.1 µF/F per year. Despite the wide range of capabilities within the region, the results showed good agreement between all but one of the participating laboratories.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 the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).

Estimating the long-term drift of travelling measurement standards for comparisons

“…Thirteen national laboratories participated in APMP.EM-K4.1 KC [14] and APMP.EM-S7 SC parallel comparisons [15] from June 2003 to May 2006 (35 months). The Andeen-Hagerling AH11A fused silica measurement standard of capacitance of 10 pF (APMP.EM-K4.1) and of 100 pF (APMP.EM-S7) at a frequency of 1 kHz and 1.592 kHz was used for the comparisons.…”

Metrological traceability of impedance parameter measurements in Ukraine

“…However, in the majority of cases, when processing the results of comparisons, applying these generalized approaches is rather difficult in practice, and sometimes impossible. Therefore, the clarification of these approaches to determine the largest consecutive subset [14] and special examples, such as the model of choice in the average value of inconsistent data are developed [15]. Nevertheless, the task of processing the results of comparisons is still completely not solved.…”

“…The aforementioned comparison became the basis for conducting similar assessments within the framework of various RMO in 2003-2013. In the framework of the RMO of the European countries, there were checks for the capacitance of 10 pF [15], the RMO of the Americas -for a capacity of 10 pF [16] and a capacitance of 100 pF [17]. In the framework of COOMET, the NMI of Ukraine participated in the surveys: for a capacitance of 10 pF at frequencies of 1 kHz and 1.592 kHz [18], for a capacitance of 100 pF at frequencies of 1 kHz and 1.592 kHz [19] and for capacitances of 10 pF and 100 pF at a frequency of 1 kHz [20].…”

“…The analysis of the processing methods of the results used in the above-mentioned comparisons showed that the reports on the comparisons of all RMO used the same procedure as described in [15]. This allows an adequate assessment of the results obtained by each of the NMI participants of the surveys.…”

Support of metrological traceability of capacitance measurements in Ukraine

“…In 2003-2013, the specified comparisons became the basis for similar comparisons within the framework of different RMO. Within the framework of RMO of European countries, comparisons for the capacitance of 10 pF [14], RMO of American countries -for the capacitance of 10 pF [15] and 100 pF [16] took place. Within the framework of COOMET, the Ukrainian NMI participated in comparisons: for the capacitance of 10 pF on frequencies of 1 kHz and 1.592 kHz [17], for the capacitance of 100 pF on frequencies of 1 kHz and 1.592 kHz [18], and for the capacitances of 10 pF and 100 pF on a frequency of 1 kHz [19].…”