4. 1 Necessity of maintenance
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4. Maintenance
DONG IL TECHNOLOGY LTD
Necessity of emitter pin cleaning and emitter replacement
In general, when static controllers are continuously in operation for a long period,
dust and dirt are accumulated around the emitter pin, called “fuzzy-ball’.
Depending on operating environment, ‘fuzzy-ball’ grows to block normal operation
and results in deterioration in performance of static controller.
An emitter pin (inside a emitter) is a sharp, pin-shaped object, made from tungsten.
ASG-P series produces ions using Corona Discharge method . Thus, during an
operation, high voltage is applied on its emitter pin, which rounds the sharp pin
away as the time goes on. A rounded emitter pin cannot produce ion as well as the
sharp one.
For these reasons, emitter and emitter pin should be cleaned and replaced
periodically.
If not cleaned, and replaced properly, worn-out emitter pin with fuzzy-balls, may
deteriorate the quality and performance of your production. Make sure that emitter
(and emitter pin) should be cleaned and replaced on a regular basis.
Recommended cleaning cycle under the circumstance below : Every 6 months
∙ Temperature : 22 ℃[a higher temperature may lengthen the cycle]
∙ Humidity : 50%[a higher humidity may lengthen the cycle]
∙ Clean Class : 10,000 Class [a lower Class index may lengthen the cycle]
∙ Quality of Supplied Air : CDA[purer air may lengthen the cycle]
※ The conditions listed above are for general environment, Actual result may slightly
vary depending on the user’s working environment.
Six months cleaning cycle is based on test conditions used by DIT. Please compare
DIT’s conditions and your working environment and adjust it and set up cleaning cycle
accordingly.