IR (DROP) COMPENSATION

"Some potentiostats are equipped with an optional ir compensation. The potentiostat electronically corrects for the solution ir drop and the potential of the working electrode is controlled (at least in principle) at the correct value. Unfortunately, most potentiostats become unstable at full compensation, so one can only make a partial compensation, resulting in an uncompensated ir drop and an error in the potential control. The user must provide the solution resistance value, though some potentiostat setups will measure it automatically. Contrast with ir (drop) correction. "