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A new power standard for audio-frequency measurements

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5 Author(s)
Deshi Zhang ; Nat. Inst. of Metrol., Beijing, China ; Yaolan Jia ; Guirong Zhang ; Youfeng Zhang
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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

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Instrumentation and Measurement, IEEE Transactions on  (Volume:39 ,  Issue: 3 )