A new proposal for the uncertainty evaluation and reduction in air electrostatic discharge tests

The technique used in air electrostatic discharge (ESD) immunity tests to approach the generator tip to the equipment under test is here dealt with. Specifically, the uncertainty contribution associated to the measurement technique is analyzed in depth. To this aim, a number of simulations and experiments are carried out by means of a proper test bed, which includes a purposely-developed slide system. Through this system, the effects of different type A uncertainty contributions are compared and the ESD repeatability is assessed. Taking into account the type B uncertainty contribution too, the purpose of the work is to provide an original and efficient proposal for improving the uncertainty evaluation in air ESD tests.