A three-arm current comparator impedance bridge is here presented. This bridge is digitally-assisted, and allows comparisons among three unlike impedances, defined as two terminal-pair standards. Its scope is the calibration of impedances having arbitrary phase angles, against calibrated nearly-pure impedances. Preliminary tests, the measurement of an air-core inductor and of an RC network versus decade resistance and capacitance standards, at kHz frequency, are presented; the relative deviations respect to well-established calibration methods are in the 10−5 to 10−6 range, with potential for improvements.
A three-arm current comparator bridge for two terminal-pair impedance comparisons over the complex plane / L. Callegaro, V. D'Elia; Pourdanesh, Faranak. - CD-ROM. - (2014), pp. 470-471. (Intervento presentato al convegno 2014 Conference on Precision Electromagnetic Measurements (CPEM 2014) tenutosi a Rio de Janeiro, Brasil nel 24-29 August) [10.1109/CPEM.2014.6898463].
A three-arm current comparator bridge for two terminal-pair impedance comparisons over the complex plane
POURDANESH, FARANAK
2014
Abstract
A three-arm current comparator impedance bridge is here presented. This bridge is digitally-assisted, and allows comparisons among three unlike impedances, defined as two terminal-pair standards. Its scope is the calibration of impedances having arbitrary phase angles, against calibrated nearly-pure impedances. Preliminary tests, the measurement of an air-core inductor and of an RC network versus decade resistance and capacitance standards, at kHz frequency, are presented; the relative deviations respect to well-established calibration methods are in the 10−5 to 10−6 range, with potential for improvements.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2616984
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