Automatic bridge for comparison of inductance standards

作者：Musiol Krzysztof^*; Met Andrzej; Skubis Tadeusz

来源：Measurement, 2010, 43(10): 1661-1667.

DOI：10.1016/j.measurement.2010.09.019

• Comparison
• Impedance bridge
• Inductance measurements
• Standard inductor

A high-precision multi-range unbalanced transformer bridge KWL5 designed for calibration of standard inductors of the same nominal value is described. The basic theory of the bridge is presented. Design, application and characterisation of the instrument which enables the direct measurement of differences of both impedance components (real and imaginary) is presented. The instrument was designed to compare inductors of values from 100 mu H to 10 H in the frequency range from 100 Hz to 10 kHz with the smallest uncertainty possible. Repeatability of the results obtained by the use of the KWL5 bridge is better than 10 ppm. Coherence equal to or better than 5 ppm for frequency range up to 10 kHz was obtained.

• 出版日期2010-12