Measurements of body impedance for ESD

High voltage, short duration Electrostatic discharge (ESD) measurement of human body impedance have been accomplished for different paths through the body. Skirt contact impedance and internal body impedance between various locations on the body were examined. Voltages of 1000 to 5000V were applied giving peak currents of 2.0 to 10A. The current waveforms had time constants 0.25 to 1.25 mu s. The short time constants are consistent with safely requirements. The body impedance between the palm of the hand and the sole of the foot was found to he about 520 to 550 Omega.