
The Trek Model 158 Charged-Plate Monitor is the premier instrument to evaluate the performance of air ionization systems.
Unique among charged-plate monitors, the Model 158 features a color graphics display to permit viewing of discharge waveforms and offset voltage in the time domain, and the ability to store test data and waveforms for hundreds of ionizer tests.
The Model 158 is compact, portable, and stores test results internally, permitting the operator to move freely about the facility to evaluate ionizers, unencumbered by a heavy instrument, laptop computer, and collateral materials to record test results. With a charge plate, the Model 158 is a complete ionizer audit kit.
The Model 158 can be line or battery operated. The unit ships with two battery packs. The battery pack is easily removed and replaced with a fresh pack to permit operation on the factory floor for extended periods of time.
Test data is stored on a removable PCMCIA flash memory card. The card containing test results is easily removed from cleanroom facilities to office areas where the test results can be downloaded, evaluated, and transferred to reports. For those demanding very strict ion balance, the Model 158 resolves 0.1 V plate voltage. The Model 158 uses an innovative voltage-follower technique to provide accuracy, stability, and bandwidth that is unavailable from charged-plate monitors which employ fieldmeter-based measurement methods.
Trek's voltage-follower technique provides virtually immeasurable loading affect of the ion collecting plate, while allowing the plate to be charged and monitored through the same, small diameter cable. The size and shape of the ion collecting plate and the plate's capacitance to ground may be optionally tailored to a particular application.
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