Advanced calibration in voltage maps measurement process

Our contribution deals with the human skin voltage chart measurement. The human skin has a certain impedance or resistance - it can be easily described and simulated using a substitute electric circuit. But the skin also contains parts with measurably lower impedance and different electric properties - it is possible to show them clearly by measurement of voltage chart. A measurement of active points was performed on certain part of the skin's surface. The parameters of the measured voltage chart are influenced by the amplitude, frequency, the shape of the driving electric signal and the skin conditions. Our research effort was focused to consider and to measure the influence of measuring device construction, used measuring probe and AD convertor.