An Application of the Potentiometer Method for Measurements of Small Electrical Resistances

A special application of the potentiometer method (Poggendorff method) for measuring low resistances is described. In this application, the voltage for the potentiometer (assistant current) is taken from the same measuring current passing the unknown resistance RX. Therefore, the influence of a variation of the current up to 25 percent during the measurement of the voltage drop across RX is eliminated.