Title :
A new power standard for audio-frequency measurements
Author :
Zhang, Deshi ; Jia, Yaolan ; Guirong Zhang ; Zhang, Youfeng ; Guo, Fengying
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
fDate :
6/1/1990 12:00:00 AM
Abstract :
A thermal power comparator for audio-frequency measurements is presented. It is essentially a double-bridge-type multiplier that consists of two multijunction thermal converters that contain two heaters. Together with a precision inductive voltage divider and current transformer for extending the voltage and current range, the comparator ensured a high-precision power standard with an AC/DC transfer error of less than 15 p.p.m. in the audio-frequency range
Keywords :
bridge instruments; comparators (circuits); measurement standards; power measurement; AC/DC transfer error; audio-frequency measurements; current transformer; double bridge multiplier; inductive voltage divider; multijunction thermal converters; power standard; thermal power comparator; Current measurement; Current transformers; Frequency; Measurement standards; Metrology; Power measurement; Reactive power; Resistors; Thermal resistance; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
