Monroe Electronics Charge Plate - Monitor - model 288B - Manual (Page 6)

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What this instrument does —
This instrument is a charged-plate monitor for evaluating the performance of ionization
systems. As such, it performs positive and negative decay tests, and balance (offset voltage)
tests to determine if an ionization system is operating effectively. It can be used to test all
types of ionization systems as described in ESD Association Standard ANSI/ESD STM3.1
Ionization.
Over the years new technologies have placed new demands on both ionization systems and
on the capabilities and features of the charged-plate monitors used to evaluate them. Monroe
Electronics has responded to these needs by incorporating many additional and improved
features in the Model 288 Charged-Plate Monitor. The original Model 288 provided the
following important capabilities for people evaluating ionization systems:

Replacement of the fieldmeter normally used to monitor the plate voltage with a high-
voltage follower amplifier to increase accuracy and reduce zero drift

Wider bandwidth to evaluate AC ionization systems

The ability to automate commonly-repeated sequences of tests and store their test
results for future review

Adjustable start and stop voltages for decay tests

A serial interface and applications software to control ionization tests from a computer
The Model 288B has been improved to provide the following capabilities:

The ability to resolve the plate voltage with 100 mV resolution

Applications software to graphically display decay and balance waveforms in real
time

The ability to measure the performance of the latest high-frequency AC ionization
systems