Electricity: measuring and testing – Testing and calibrating electric meters
Patent
1995-08-25
1997-04-29
Nguyen, Vinh P.
Electricity: measuring and testing
Testing and calibrating electric meters
3241581, 324601, G01R 2702
Patent
active
056252838
ABSTRACT:
A method and apparatus for calibrating a CRT arc counter or other current triggered device having a bifilar wound core and circuitry for causing a predetermined current pulse train to run through said core. Each pulse in the current pulse train creates an electromagnetic field around the core. A probe of the arc counter or other current triggered device is positioned within the electromagnetic field of the core so as to detect it. The calibration apparatus is provided with a switch which can attenuate the current pulses through the core by a predetermined amount. The sensitivity of the device under calibration is adjusted so as to be triggered by the unattenuated pulses and not triggered by the attenuated pulses.
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Harry Mileaf; "Electricity One-Seven"; 1966; p. 3-62.
Nguyen Vinh P.
Sony Corporation
Sony Electronics Inc.
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