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Digital generator assisted impedance bridge

TitleDigital generator assisted impedance bridge
Publication TypeConference Paper
Year of Publication2002
AuthorsCorney, A. C.
Conference NameCPEM Digest (Conference on Precision Electromagnetic Measurements)
KeywordsDigital generator, Electric generators, Electric impedance, Electric measuring bridges, Electric potential, Impedance bridge, Voltmeters
Abstract A manually-operated prototype wide-range four-terminal-pair universal impedance bridge has been constructed in order to test ideas for an automated bridge. The least relative uncertainty is 2×10-5 at 1 kHz and about 20×10-5 at 100 kHz. A two-phase digital voltage generator provides convenient sources for the two voltages required to bring the bridge to near but not exact balance. The detector offset voltages are measured with a vector voltmeter and used to correct for the inexact balance.