Title :
Impedance Bridge Ratio Transformer Calibration by Reference-Step Conductance Build-Up
Author_Institution :
Meas. Stand. Lab., New Zealand Ind. Res. Ltd., Lower Hutt
Abstract :
A reference-step conductance build-up method suitable for automation has been developed for calibrating the ratio dial transformer of a wide-range impedance bridge. The uncertainties over the range 40 Hz to 20 kHz are estimated not to exceed 0.2 muV/V referred to the divider input voltage. At 100 kHz, the uncertainties do not exceed 2muA7V
Keywords :
calibration; electric admittance measurement; estimation theory; measurement uncertainty; transformers; 40 to 20000 Hz; impedance bridge; ratio dial transformer; ratio transformer calibration; reference step conductance build up; uncertainties; Admittance; Bridge circuits; Calibration; Frequency conversion; Impedance; Measurement standards; Power transformer insulation; Resistors; Switches; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location :
London
Print_ISBN :
0-7803-8494-6
Electronic_ISBN :
0-7803-8494-6
DOI :
10.1109/CPEM.2004.305624
