Alternative Evaluation of the Results of Key Comparisons of Electrical Capacitance Standards

Abstract

The practical application of traditional evaluation of the results of key comparisons of measurement standards may be difficult for accredited laboratories that wish to use National Metrology Institutes calibration service. Traditional using only the degree of equivalence of a National Metrology Institute standard with corresponding expanded uncertainty without any other characteristics for evaluating of calibration or measurement capabilities. The paper presents a proposed alternative evaluation of the results of key comparisons, which simplifies the analysis of National Metrology Institute calibration services. It envisages the use as a criterion of consistency of the obtained results of key comparisons of the En index to analyze of the degree of equivalence of National Metrology Institute standard and its expanded uncertainty. The practical application of the alternative evaluation for key comparison results for electrical capacitance standards is considered. This contributes to a more streamlined calibration of working standards of accredited laboratories for specific purposes.