The Josephson-Effect-Based Primary AC Power Standard at the PTB: Progress Report

This paper reports the incorporation of a Josephson waveform synthesizer (JWS) into the primary standard for AC electrical power at the Physikalisch-Technische Bundesanstalt (PTB). The increase to 10 V of the amplitude delivered by the JWS has allowed matching of the levels of the signals measured t...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2009-04, Vol.58 (4), p.1049-1053
Main Authors: Palafox, L., Behr, R., Ihlenfeld, W.G.K., Muller, F., Mohns, E., Seckelmann, M., Ahlers, F.
Format: Article
Language:English
Subjects:
Alternating current
and apparent
Calibration
Electric potential
Electric power generation
Electric variables measurement
Instrumentation
Josephson junctions
Measurement standards
Power measurement
Precision power measurements (active
programmable Josephson voltage standards
reactive
Sampling methods
superconductor-insulator-normal conductor-insulator-superconductor (SINIS) Josephson junctions
Synthesizers
Testing
Voltage
Voltmeters
Waveforms
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Summary:This paper reports the incorporation of a Josephson waveform synthesizer (JWS) into the primary standard for AC electrical power at the Physikalisch-Technische Bundesanstalt (PTB). The increase to 10 V of the amplitude delivered by the JWS has allowed matching of the levels of the signals measured to determine the active, reactive, and apparent power-at the 120-V and 5-A level, which is also measured by the device under test. The inherent noise- and drift-free voltages delivered by the JWS allow calibration of the core sampling voltmeter of the PTB primary power standard with an uncertainty of 0.4 muV/V(k = 1) in 100 signal periods and as part of the measuring sequence.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2008.2008862