Title :
A power comparator with high accuracy: simple and inexpensive
Author :
Laiz, Héctor ; García, Ricardo
Author_Institution :
Nat. Inst. of Ind. Technol., Buenos Aires, Argentina
fDate :
4/1/1997 12:00:00 AM
Abstract :
This paper describes a thermal wattmeter that measures ac power within 10×10-5 (1 σ) 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 errors; power measurement; wattmeters; ac power measurement; power comparator; power frequencies; thermal wattmeter; total uncertainty; Current transformers; Electrical resistance measurement; Instruments; Laboratories; Magnetic flux; Switches; Temperature; Voltage control; Voltage transformers; Wattmeters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
