Title :
Digital generator assisted impedance bridge
Author_Institution :
Meas. Stand. Lab. of New Zealand, Ind. Res. Ltd., Lower Hutt, New Zealand
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/spl times/10/sup -5/ at 1 kHz and about 20/spl times/10/sup -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.
Keywords :
bridge instruments; electric impedance measurement; signal generators; 1 kHz; 100 kHz; automated bridge; detector offset voltage; relative uncertainty; two-phase digital voltage generator; vector voltmeter; wide-range four-terminal-pair universal impedance bridge; Admittance measurement; Bridge circuits; Detectors; Frequency; Impedance measurement; Prototypes; Resistors; Testing; Transformers; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034776
