PROBLEMS CONCERNING THE CALIBRATION OF MEASURING INSTRUMENTS UNDER SPECIFIED CONDITIONS

摘要

The calibration of measuring instruments (MIs) on the basis of a correction function (CF) under specified conditions is considered as a measurement problem involving the structural and parametric identification of a calibration diagram. In the first step, the correction function is shown to obtain a relation for correcting indications. In the second step, in order to find the corrected measurement result, it is necessary to identify the probability distribution of possible deviations from this relation. A possible solution to the measurement problem concerning calibration under specified conditions is presented. The following problematic factors affecting MI calibration are noted: MI calibration performed under normal conditions using MI verification procedures; presentation of calibration results in the form of tables containing combined indications of MIs and measurement standards; significant restrictions (in calibration diagram calculations) on the mathematical apparatus of Guide to the Expression of Uncertainty in Measurement specified in GOST R 58771-2019, "Risk Management. Risk Assessment Techniques."