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Personal Impactor Model 200
Figure 3.
Model 200 Personal Impactor in Clamping Device
Figure 4.
Assembled Model 200 Personal Impactor
O p e r a t i o n
Disassembly Procedure
The Model 200 Personal Impactor is disassembled by removing the two
screws holding the nozzle cap to the base. Optional spanner screws (flat
head with two holes) and matching screw driver could be used for
applications where there is a risk of the wearer opening the sampler.
After the screws are removed, the nozzle cap is lifted straight up and
clear of the impaction ring assembly. Next, the impaction ring assembly is
removed exposing the after-filter.
Coating the Impaction Plate
To keep the particles from bouncing off the impaction ring, light mineral
oil should be applied to this surface.
For most sampling applications, saturating the porous metal with a light
mineral oil is best. As the particles strike the ring, the oil will wick up
through the deposit and continually provide a fresh surface for new
particles to strike. The oil can be applied to the ring with an eye dropper
by placing the drops evenly about the disk. Fourteen drops is about the
maximum that the plate will hold. When it takes 5 to 10 seconds for a
drop to disappear into the ring, the ring is saturated, and no more oil
should be added. Excess oil can be removed from the ring by touching a
