Title :
A power comparator with high accuracy simple and inexpensive
Author :
Laiz, H. ; Garcia, R.
Author_Institution :
Dept. de Fisica y Metrologia, INTI, San Martin, Argentina
Abstract :
This paper describes a thermal wattmeter that measures ac power within 10 ppm (1 /spl sigma/) at power frequencies. The instrument relates ac power to dc standards. Its main achievement is that its few components can be separately evaluated and by this means its total uncertainty estimated.
Keywords :
comparators (circuits); measurement standards; power measurement; ac power; current transformer; dc standards; power comparator; power frequencies; thermal converter; thermal wattmeter; total uncertainty; voltage transformer; Current transformers; Frequency; Instruments; Measurement standards; Power measurement; Switches; Uncertainty; Voltage control; Voltage transformers; Wattmeters;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547348
