Title :
Wideband wattmeter based on RMS voltage measurements
Author :
Waltrip, Bryan Cristopher ; Oldham, Nile M.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
fDate :
8/1/1997 12:00:00 AM
Abstract :
A wideband wattmeter for measuring active power over a frequency range of dc to 500 kHz is described. The wattmeter is based on the three-voltmeter method in which three rms voltage measurements are used to calculate power. The wattmeter active power uncertainty is estimated to be within 0.03% from dc to 20 kHz and within 1.5% to 500 kHz
Keywords :
buffer circuits; digital instrumentation; digital voltmeters; power measurement; voltage dividers; voltage measurement; voltmeters; wattmeters; 0 to 20 kHz; 0 to 500 kHz; DVM; RMS voltage measurement; active power; law of cosines; three-voltmeter method; wideband wattmeter; Broadband amplifiers; Circuit testing; Frequency; Power measurement; Reactive power; Resistors; Voltage measurement; Voltmeters; Wattmeters; Wideband;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
