Title :
Uncertainties in the measurement of ac voltage using a programmable Josephson voltage standard and a phase sensitive null detector
Author :
Georgakopoulos, D.
Author_Institution :
Nat. Meas. Inst., Lindfield, NSW, Australia
Abstract :
This paper investigates the required characteristics and the systematic errors of a lock-in amplifier (LIA) when it is used as a null detector for the measurement of AC voltage by comparison with a stepwise approximated sinewave (SASW) generated using a programmable Josephson voltage standard. It is shown that the uncertainties introduced by the LIA in the measurement are related to the number of samples per period of the SASW and can be reduced to levels below 0.5 μV/V.
Keywords :
measurement standards; measurement uncertainty; phase detectors; voltage measurement; AC voltage measurement uncertainty; a stepwise approximated sinewave; lock-in amplifier; null detector; phase sensitive null detector; programmable Josephson voltage standard; systematic errors; AC generators; Detectors; Electromagnetic measurements; Measurement standards; Measurement uncertainty; Phase detection; Phase measurement; Power harmonic filters; Total harmonic distortion; Voltage measurement;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5543436
