APPLICATION NOTE: Electric Fields and Fieldmeters in Web Converting
■Content:
▲This document provides the reader with a review of how fieldmeters operate to measure electric fields, the effects of web-converting machine geometry and operator techniques when measuring electric fields, how handheld fieldmeters are used to investigate where static problem areas exist on machines, and techniques for interpreting fieldmeter readings.
▲This document is the second in a series of three application notes about static charging of materials and equipment in web converting machines, including recommendations for static measurement, control, and continuous monitoring. The first document in this series is application note Electrostatic Charging In Web Converting.
■Review:
▲Generation and control of static in web converting depends upon many varying conditions in the web material, the converting machine, the surrounding atmosphere, and the static control measures used on the machine. It is impossible to predict and control all of these conditions because they can change without one realizing it until a statically caused event occurs. Changing conditions can alter the amount of static charge accumulation, so although static is under control today, it may not be under control tomorrow.
▲The keys to continuous static control are:
◆The correct determination of critical areas of the machine to monitor for staticcharge accumulation,
◆Application of static countermeasures and devices that prevent or controlstatic charge accumulation, and
◆Continuous electric field measurement in these critical areas usingpermanent fieldmeters, which are alarmed to warn or shutdown the operationwhen web static charge levels increase beyond predetermined set points.
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handheld fieldmeters 、 Electric Fieldmeters 、 Electric Field |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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4.20 |
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773 KB |
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