Impedance meter

Details Impedance meter Impedance meter

1981-03-05

1983-10-11

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 83Q, 324 83R, G01R 2700, G01R 2500, H03D 1300

Patent

active

044095430

ABSTRACT:
An apparatus is disclosed for determining the impedance and dissipation factor of a capacitive and/or inductive device and to reduce measurement error by digital calculation and manipulation. A synchronous rectifying means, a phase shifter and a detecting means are employed to detect the in-phase and orthogonal components of the current through a device and to compare it to a reference voltage impressed across the device. An arithmetical calculation using the values of these components determines the impedance and the dissipation factor of the device.

REFERENCES:
Hashimoto et al. "An Automatic . . . LCR Meter" hp Journal-Sept. 76.
Maeda et al. "Multifrequency LCR Meters . . . " hp Journal-Feb. 79.

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