Maintenance and Service 6–11
process, it should be replaced with the spare screen from the
accessory kit.
7. To clean the Dacron screen, use tweezers to dip the screen into
a clean beaker filled with isopropyl alcohol. Repeat three times.
8. The screen must be dry before the Electrostatic Classifier will
operate correctly. You can air-dry the screen or use a very light
flow of filtered, compressed air.
9. Reassemble unit.
Cleaning Kr-85 Bipolar Charger/Neutralizer
Caution
Do not use solvents that might corrode stainless-steel or epoxy. See
the separately bound Model 3077A/3077 Aerosol Neutralizers
Instruction Manual for very important U.S. Nuclear regulatory
commission limitations and regulations; also, consult your local
radioactivity regulations.
WARNING
The use of controls, adjustments, or procedures other than those
specified in this manual may result in exposure to hazardous radiation.
Do not use water above 50°C. Temperatures above 50°C can
degrade materials that are a part of the Neutralizer (303, 304, or 316
stainless steel, copper, silver solder, or epoxy), causing the
Neutralizer to leak radioactive contamination.
Do not fill the Neutralizer with water and then shake it. This could
cause sufficient mechanical shock to damage the krypton source,
causing it to leak. Instead, allow water to flow through the
Neutralizer.
To clean the Model 3077A/3077 Neutralizer, refer to Figure 6-7 and
follow the steps below:
1. Switch the Classifier off and unplug the power cord.
2. Remove the two screws securing the neutralizer outlet block,
and remove the block by lifting it up using the ¼-in
Polydisperse Flow tube.
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