The CPM-720B Charge Plate Assembly is a miniature isolated plate attachment for the PFM-711B Electrostatic Field Meter. It converts the PFM-711B Field Meter into a portable, battery operated charged plate monitor (CPM). This unique design allows precision balancing of ionizing blowers and other devices to less than ±5 volts accuracy.

When used with auxiliary leads or wrist strap, the CPM-720B measures body voltage and equipment charge generation. Combining this unique assembly with the PCS-730B Electrostatic Charger, one can easily confirm ionizer performance, plot decay times, measure suppression, and perform a variety of other electrostatic evaluations and demonstrations.