AC Quantum Voltmeter used for Impedance Comparison

Damir Ilić, Ralf Behr, Jinni Lee

Abstract

This paper describes the experimental application of the AC quantum voltmeter, developed at PTB, for impedance ratio measurements at voltages up to 5 V and frequencies up to 1 kHz, as continuation of previous work. In such an application the AC quantum voltmeter is not directly measuring the output voltage of an AC source (as in ordinary use), but measures the voltage drop on the impedance, raising the requirements for synchronisation, grounding, and load influence of the used AC voltage source. Therefore, three types of AC sources were tested, a calibrator Fluke 5720A, a new version of an Aivon DualDAC3, and PTB’s PDWQ mk21. As impedances, two temperature stabilized Vishay resistors of nominal values of 10 kΩ are used. They are measured in a potentiometric way, i.e., the AC quantum voltmeter measures the RMS voltages on each resistor in a time sequence. The measurement results for different setups are described and presented.

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IMEKO-TC4-2022-05.pdf

DOI

10.21014/tc4-2022.05

IMEKO TC

TC4 - Measurement of Electrical Quantities

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