Punching Out a Preventive Maintenance Punch List

The last item for inspection is the treatment station, but this would be the first place to look when troubleshooting. The inside of a corona treater is a very harsh environment. You have ozone, heat, and high voltage. Plus, you are constantly drawing plant air, along with any process particulates through the station. When dirt and/or moisture accumulate inside, you will have failures. Always check for cleanliness from the point the high voltage enters the station to where it connects to the electrode. Include any standoffs that may be holding the high-voltage wire in place. Then, inspect the electrode and electrode insulators. Remember that the insulators are the most common place for carbon trails to form. If the treat roll is dielectric covered, look for excessive wear that may indicate that the covering should be replaced. In addition to checking for cleanliness, all safety interlocks should be checked for proper operation.