Electrode Effects in the Measurement of Power Factor and Dielectric Constant of Sheet Insulating Materials

Abstract

It is shown that, aside from the guard ring type of electrode which can only be used with certain special types of measuring circuit, the most accurate results can probably be obtained by the use of equal foil electrodes and making proper allowance for the edge effects. From the standpoint of convenience, mercury electrodes and foil electrodes of unequal size have certain advantages. It is believed that the results obtained with these two types are also sufficiently accurate for most purposes when the corresponding corrections are applied.