6-4 Electrostatic Classifier Model 3082 and SMPS Spectrometer Model 3938
5. Examine the orifice under a microscope or powerful magnifying glass.
If the orifice is dirty, squirt alcohol through the nozzle until clean.
6. Alternative cleaning methods include immersing the impactor body in
clean soapy water or isopropanol, or soaking it in an ultrasonic bath.
7. Reassemble the impactor.
Replacing Impactor O-Rings
Damaged impactor O-rings can result in poor zero count results, an
incorrect penetration curve, and/or inaccurate differential pressure
measurements. If they are nicked or cut, they should be replaced.
There are three O-rings on the impaction plate; one face-seal and two
radial seal. To replace the three impactor O-rings, follow these instructions:
1. Power off the classifier.
2. If installed, remove the impactor by turning the impactor
counterclockwise.
3. Separate the black impactor body from the impaction plate.
4. Using a pin or a small, slotted screwdriver, remove the two 1-017 radial
O-rings (2501605) from the outside of the impaction plate. Be careful
not to puncture the O-ring during the removal process.
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