Error of the primary measurement standard

Abstract

In state verification schemes, the errors of primary standards of units are replaced by estimates of measurement uncertainty. This is due to the lack of an explicit verbal and mathematical definition of the term “error of a primary standard”. However, the disadvantage of measurement uncertainty estimates is the risk of their failure due to the lack of a verification of the applicability condition. This condition is practically formulated in the “Guide for Expressing Measurement Uncertainty”, but it does not have a quantitative criterion. The reason for this deficiency is the incomplete description of the measured quantity in the indirect measurement method, as well as the inadequacy of the corresponding equation or mathematical model of the measurement object. In this article, the error of the primary unit standard is determined based on the conversion formula. The formula is considered as a probability distribution of deviations from the nominal (nominative) value of a reproducible quantity using data obtained according to verification schemes. The formula is considered as a probability distribution of deviations from the nominal (nominative) value of a reproducible quantity using data obtained according to verification schemes. The use of this distribution as a reproducibility characteristic makes it possible to control the convergence conditions. This removes the problem of the true value as an unknown quantity, which served as the basis for replacing the concept of error with measurement uncertainty.