Title :
A new wattmeter for traceable power measurements at audio frequencies
Author :
Pickering, J.R. ; Wright, P.S.
Author_Institution :
Metron Designs Ltd., Norwich, UK
fDate :
June 27 1994-July 1 1994
Abstract :
This paper describes the development of a wattmeter designed for traceable power measurements to 30 kHz and above. A description is given of a technique, which uses the three RMS values of voltage, current and sum of voltage and current to measure power. The resulting system is based around an analogue signal processor, which provides signal ranging and isolation. The design of the signal processor includes several unique aspects. Traceability is achieved by characterization of each stage of the system, this together with the overall measurement uncertainties, are reported. The results of comparisons with other standards are given.<>
Keywords :
analogue processing circuits; power measurement; wattmeters; 30 kHz; AF; RMS values; analogue signal processor; audio frequencies; current measurement; isolation; measurement uncertainties; signal ranging; traceability; traceable power measurement; voltage measurement; wattmeter; Current measurement; Frequency measurement; Power measurement; Process design; Signal design; Signal processing; Switched-mode power supply; Voltage; Voltmeters; Wattmeters;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333240
