Measure effectiveness of air ionisation systems

Edited by the Engineeringtalk editorial team Jul 19, 2001

Boiswood is now supplying the new Simco EA-4 Charge Plate Monitor, designed to provide quantitative measurements of the effectiveness of air ionisation systems

Boiswood is now supplying the new Simco EA-4 Charge Plate Monitor, which is designed to provide quantitative measurements of the effectiveness of air ionisation systems.

The EA-4 features a new design that uses an ultra-high impedance, high-voltage follower to monitor the test plate voltage.

This technique provides very high accuracy and virtually infinite impedance loading of the plate, while allowing the test plate to be charged and monitored through the same small-diameter connection.

It also makes the measurement capacitance independent of the physical size and shape of the test plate.

The simplicity of the design of the EA-4 makes it very reliable and completely portable.

It provides up to eight hours of operation, powered by an internal rechargeable battery.

The EA-4 also has a serial interface port to connect with a computer, allowing it to program test sequences and save or retrieve test results.

Any series of tests can be duplicated, analysed, programmed or retrieved using PC-based software.

The EA-4 provides two modes of operation - a discharge time mode with easy-to-program start and stop voltages, and a plate voltage mode.

For discharge time mode operation, the test plate is charged above the programmed 'start' voltage.

The EA-4 indicates the time required to discharge the test plate from the programmed 'start' voltage to the programmed 'stop' voltage due to incident ion flow to the test plate.

In the plate voltage mode of operation, the test plate is initially discharged to zero and then is driven to the voltage level dictated by incident ion flow to the test plate.