A low-cost, hand-held set of instruments for measuring electrostatic fields and testing ionizer performance.
Ion Systems' 775pvs Periodic Verification System is a hand-held alternative to a charged plate monitor. It consists of three components-a fieldmeter, a detachable plate, and a charger-for measuring static charge and verifying ionizer performance. Used alone, the fieldmeter measures electrostatic fields on any surface. Ranging lights ensure accurate and repeatable measurements by enabling users to determine the exact distance at which the voltage reading is correct. A SAMPLE and HOLD function allows measurements in places difficult to reach with other instruments. Attach the plate and use the charger, and the 775pvs can be used to verify ionizer operation and check ion balance and discharge times. The unit is designed to take measurements that correspond to those made by a charged plate monitor following Ionization Standard ANSI EOS/ESD S3.1-1991 of the ESD Association (see graph below). For increased accuracy, a conductive, impact-resistant case and flexible ground cord facilitate grounding.
Plate Assembly and Charger
The 775 Plate Assembly and 775c Charger have been designed to match the small size of the fieldmeter. The charger contains an isolated power supply with two stainless steel contact plates for positive or negative charging. A set screw in the plate assembly calibrates the measured voltage.