for formal measurement of charge decay time and voltage sensitivity performance features of JCI155v5 and JCI 155v4 Charge Decay Test Units. Provides opportunity for measurements of voltage sensitivity with calibrator plate voltages up to 1000V and decay time measurement performance at 0.1, 1, 10, 100 and 1000s. Supplied with capacitors and resistors pre-calibrated to National Standards with 12 months calibration validity. Supplied with Calibration Certificate and User Manual.