Journal
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Volume 64, Issue 6, Pages 1466-1471Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2015.2398953
Keywords
Bridge circuits; digital-analog conversion; electromagnetic devices; impedance measurement; precision measurements
Funding
- Progetto Premiale Ministero dell'Istruzione, dell'Universita e della Ricerca-Istituto Nazionale di Ricerca Metrologica [P4-2011, P6-2012]
- European Metrology Research Programme (EMRP) Project [SIB53 AIM QuTE]
- EMRP participating countries within European Association of National Metrology Institutes
- European Union
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We present here the concept of three-arm current comparator impedance bridge, which allows one to perform comparisons among three unlike impedances. Its purpose is the calibration of impedances having arbitrary phase angles against calibrated nearly pure impedances. An analysis of the bridge optimal setting and proper operation is presented. To test the concept, a two-terminal-pair digitally assisted bridge has been realized; preliminary measurements of an air-core inductor and of an RC network versus decadic resistance and capacitance standards, at kilohertz frequency, have been performed. The bridge measurements are compatible with previous knowledge of the standard values with relative deviations of parts in 10(-5).
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