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Overcome 100Ohm minimum impedance

Question asked by gugi on Aug 23, 2015
Latest reply on Sep 10, 2015 by gugi


In 2 wires measurement there is requirement about 100 Ohm minimum impedance to achieve stability of measurements and to measure for example 100mOhm we need to put serial 100Ohm resistor.

For 4 wires measurement (UG-587.pdf Figure 89) if I place RA resistors to be 50Ohm each, is it possible SENSOR(unknown impedance) to be as low as several milliohms, or I shall still need to add serial resistors ?


Thank you