Measurement of charge transfer in electrostatic discharges

Experimental studies are reported that show the errors that arise in using unshielded probes for measuring charge transfer in electrostatic discharges. Comparable errors will apply where unshielded probes are used for current flow measurements. Errors are avoided by using shielded probes with an appropriate charge measurement circuit. These results are relevant to the design of probes to be included in IEC Standards.