Methods and systems for accuracy improvement in current comparators
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United States of America Patent
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Apr 25, 2017
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N/A
app pub date -
Jul 1, 2014
filing date -
Jul 2, 2013
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Abstract
Precision AC and DC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address remnant magetization within the current comparators that form the basis of the measuring process within many of the measurement instruments providing the precision AC and DC measurements and calibrations. Accordingly, the inventors present current comparator and measurement system architectures together with control protocols to provide for correction of this remnant magnetization.
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