Errors and Uncertainties in the Calibration and Verification of Measuring Instruments of Electrical Quantities

Assoc. Prof. Dr. Yu. A. Baryshev, Head of Department, Electrical Measurements, FSAEI FVT ASMS, Moscow, Russia, baryshev@asms.ru
Dr. N.N. Vostroknutov, Senior Researcher, Associate Professor, FSAEI FVT ASMS, Moscow, Russia, vostrkit@yandex.ru

key words

reliability of control, measurement error, metrological characteristics, uncertainty, measurement accuracy, conformity assessment

References

We have reviewed the issues of correct perception of uncertainty. We have given a correct interpretation of this term and correlated this concept with the error of measurements taken during verification of measuring instruments. The error in the verification of measuring instruments is determined on the basis of single measurements and has a plus or minus sign. At calibrating the measuring instruments, there is a need to determine uncertainty, which requires the investigation of metrological characteristics and it is characterized by a range. It breaks the balance between verification and calibration. We have offered considering the conditions under which calibration results of measuring instruments can be used for verification and at the same time comply with the legal requirements for confirming compliance of this measuring instrument with metrological requirements. We have presented a mathematical model of calibration, which will formulate the requirements allowing using the results of measuring instrument’s calibration during verification.

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