Abstract
The article deals with the current issues of calibration of test equipment and measuring instruments. These issues arise in laboratory activity in accordance with the requirements of DSTU ISO/IEC 17025:2006. Sources of inaccuracies and different interpretations of the term “calibration” and the formulation of its results are given, the ways of solving problems connected with practical calibration are substantiated and proposed. Unsubstantiated application of requirements for calibration of laboratory supplementary equipment (thermostats, refrigerators, etc.) are shown as examples. The principal difference between calculating uncertainty of measurement in calibration and uncertainty of measurement result by measuring instrument to be calibrated is shown. The considerations on the optimal choice of ratio for the accuracy characteristics of the measurement standards and the measuring instruments to be calibrated are given. It is shown that it is necessary to develop documents that would clarify and eliminate the existing differences in interpretation of the concept, process and reporting of the results of calibration.
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