A room-temperature diamond quantum sensor successfully unifies both alternating current (AC) and direct current (DC) ratio calibration within the same device set-up, according to a new study.
Researchers led by Japan’s National Institute of Advanced Industrial Science and Technology developed the current comparator, which can accurately measure both current ratios in single, highly integrated configuration.
A current comparator is a high-precision device that uses balancing magnetic fields to measure the exact ratio between two electrical currents, helping to calibrate instruments used in power generation, transmission and distribution.
Historically, because the underlying measurement principles differ for AC and DC, completely separate measurement technologies, distinct calibrations and testing set-ups have been required to evaluate AC and DC current ratios.
For instance, conventional current comparators used for AC measurement rely on electromagnetic induction. While they can measure...