Surface resistivimeter

Details Surface resistivimeter Surface resistivimeter

1981-09-15

1984-05-01

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 65P, G01R 2702, G01R 2726

Patent

active

044464240

ABSTRACT:
Resistivimeter device for measuring the surface resistance of a structure coated with an inner resistive layer and an outer insulating superficial layer. This device comprises a pick-up to be placed on the structure surface and formed of a central cylindrical electrode, two intermediary annular electrodes and an outer annular electrode coaxial with the central electrode. A supply alternating voltage is applied between said central and outer electrodes, and the current thus produced is applied to a load resistor. The voltage across this load resistance is then measured. The inter-electrode voltage appearing between the intermediary electrodes is also measured. The component of the inter-electrode voltage cophasal with the load resistor voltage is formed and is divided by the load resistor voltage.

REFERENCES:
patent: 4075557 (1978-02-01), Jurca
patent: 4218650 (1980-08-01), Matzen
patent: 4335350 (1982-06-01), Chen
Batt: "Surface Resistivity and Power Measurement"-Colloquium on the Measurement of Power at Higher Microwave Freqs.-London-UK-Jan. 1979.
Phillips: "Versatile Four Probe AC Conductivity Measurement System" Rev. Sci. Instruments-Feb. 1979-pp. 263-265.

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