MULTI-RANGE TRANSFORMER BRIDGE FOR CALIBRATION OF INDUCTANCE STANDARDS

Andrzej Met, Krzysztof Musiol, Tadeusz Skubis

Abstract

A high-precision multi-range unbalanced transformer bridge designed for inductance standard calibration is described. Basic theory of the bridge is discussed which enables direct measurement of differences of both impedance components (&Delta;<i>L</i> and &Delta;<i>R</i>). The instrument was designed to compare inductors from 100 mH to10 H in the frequency range from 100 Hz to10 kHz. The uncertainty of comparison in the impedance range from 1 W to 10 kW is assessed to be smaller than 10 ppm.

Keywords

inductance measurements, standard inductor, transformer bridge

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IMEKO-WC-2009-TC4-683.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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