RESISTANSMETARE

摘要

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.