Evaluation of the long-term drift of measuring instruments and standards using time series

Oleh Velychko, Tetyana Gordiyenko

Abstract

Drift is an undesirable property of all measuring instruments and standards during their life cycle. The analysis of instrumental drift of measuring instruments and standards is important in metrology. Reliable accounting for drift plays an important role in maintaining measurement accuracy. For resistance, capacitance and inductance standards long-term drift is predictable. The analysis of drift types and the main methods of its evaluation for measuring instruments between its calibrations has been carried out. The results of evaluation of the long-term drift of inductance and capacitance standards for highprecision calibration of measuring instruments using a polynomial regression and an Exponentially Weighted Moving Average charts are presented.

Keywords

longterm drift, instruments, standards

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IMEKO-TC4-2023-01.pdf

DOI

10.21014/tc4-2023.01

IMEKO TC

TC4 - Measurement of Electrical Quantities

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