Petar Miljanic 2004 Metrologia 41 365 doi:10.1088/0026-1394/41/6/002
Petar Miljanic
Show affiliationsA two-stage transformer, built as a current comparator with a shielded magnetic core, is used to make a novel ac bridge for calibration of ac shunts for large currents and other ac current-to-voltage converters. A fine adjustable reference transresistance is made by current transformation and a non-reactive precision resistor connected to the secondary. By using an auxiliary transformer and resistor, all four two-stage transformer secondary terminals are brought to ground potential and consequently both magnetizing and capacitive errors are kept below one part per million.
84.30.Sk Pulse and digital circuits
84.32.Ff Conductors, resistors (including thermistors, varistors, and photoresistors)
Issue 6 (December 2004)
Received 19 July 2004
Published 21 September 2004
Petar Miljanic 2004 Metrologia 41 365
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