SKC 225-390 IMPACT Sampler - Manual (Page 3)

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Impactor Preparation
Cleaning
For optimum performance, the IMPACT Sampler inlet, exhaust, and fi lter cassett e
should be cleaned aft er fi ve runs or upon a noticeable buildup of material. This
will remove oil buildup from the top of the fi lter holder and other residue built
up from frequent sampling. Disassemble the impactor and wash parts in water
with a liquid detergent or soap. Rinse and air-dry all parts thoroughly in a clean
environment.
Caution: Do not place any mechanical object in the inlet nozzles.
O-ring Care
Visually inspect the condition of the BUNA-N exhaust O-ring (see illustration on
page 2 for location). Ensure the O-ring surface is smooth (i.e., without cracks, cuts,
or other damage). Ensure the O-ring is fi tt ed properly in its channel. Replace the
exhaust O-ring if there is apparent damage, stretching, or thinning. It is recom-
mended that the PTFE inlet O-ring (2 in PM Coarse model) be replaced by the
manufacturer only.
Inserting a Collection Filter into the IMPACT Sampler
The IMPACT Sampler will arrive already assembled. Disassemble it to insert
collection fi lter.
Unscrew inlet from exhaust. Remove fi lter cassett e.
3a. Use the fi lter cassett e opener
accessory to open fi lter cassett e.
3b. Slide the fi lter cassett e horizontally
into the "U" of the opener until the
two halves of the cassett e loosen.
Gently pull halves apart.
Ensure the stainless steel support
screen is in place in bott om of
fi lter cassett e.
Using forceps accessory, place a
preweighed 47-mm fi lter on the
support screen.
Press fi lter cassett e top into
fi lter cassett e bott om.
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