RESEARCH OF LONG-TERM DRIFT OF THE NATIONAL INDUCTANCE STANDARD

2023;
: pp.23-29
1
State Enterprise “Ukrmetrteststandard”, Ukraine
2
State Enterprise “Ukrmetrteststandard”, Ukraine

Inductance measurements is important for all branches of technology related to the application of electricity: energy
and electronics, radio and television, transport and communication, and scientific research. Electromechanical devices and
electronic components can be characterized using impedance measurements to identify the parameters of their equivalent electrical
model. New inductance measurement methods are being developed in specific fields of activity. Manufacturers of standards and
measuring instruments of inductance develop special handbooks outlining various methods of inductance measurement. The State
Primary Standard of Ukraine for inductance and loss angle tangent reproduces and transmits a unit of inductance in the range from
1∙10-6 H to 10 H at a frequency of 1 kHz. It is keeping in the SE “Ukrmetrteststandard” and participated in several comparisons of
national standards within the framework of the activities of regional metrological organizations. The calibration and measurement
capabilities of inductance measurement of national laboratories of different countries were studied to analyze and compare the
capabilities of the national standard with the standards of other countries. Long-term instability studies of inductance measures of 1
mH, 10 mH and 100 mH, which are part of the national standard unit of inductance, have been conducted. The research period
covered from 2009 to 2022. It was established that the drift lines of the specified inductance measures can be described using linear
approximations. The rationale for choosing inductance measures of 10 mH and 100 mH for their use as transmission standards
in the calibration of standards, which were organized and conducted by SE “Ukrmetrteststandard” as their pilot laboratory, is
given.

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