ESD Pulse Calibration call for high class test equipment and a carefully configured test rig. All the elements incorporated within the measurement chain must be matched to one another before highly accurate measurements with minimal uncertainties can be contemplated. 

ESD generators are calibrated according to the standard IEC/EN 61000-4-2 Ed 2.0. Measurement of individual impulse parameters is performed using a special coaxial current shunt. This has a nominal impedance of 2 Ohms. Because ESD events can be generated as high as 120A, attenuators are required to reduce the impulse-voltage level so it can be displayed on commercial oscilloscopes. An oscilloscope with minimum 2GHz bandwidth is required to properly display the ESD impulse.