6
Inserting an Impaction Disc into the IMPACT Sampler
For PM2.5 or PM10 sampling, insert an impaction disc only after a collection
fi
lter has been loaded into the
fi
lter casse
tt
e.
Technical Tidbits
•
Install the rain cover (included with the DPS System) on the inlet of the
IMPACT Sampler when sampling outdoors.
•
SKC recommends using a new impaction disc for each sample.
F o r P M 2 . 5 o r P M 1 0 ,
ensure a collection filter
has been loaded into the
fi
lter casse
tt
e (see Inserting
a Collection Filter into the
IMPACT Sampler).
1
Place the impaction disc in the recessed area
on the
fi
lter casse
tt
e top. The rough side of the
impaction disc should face up. SKC-supplied discs
are stamped with “UP” on the appropriate side.
Place the
fi
lter casse
tt
e on the exhaust and screw
the impactor inlet and exhaust together just until
tight. Further hand-tighten by 1/4 turn only.
Do not overtighten the impactor inlet and
exhaust. Do not use the barbed
fi
tt
ing as
leverage when tightening.
Keep the sampler upright until the inlet
is securely screwed onto the exhaust to
prevent the impaction disc from being
dislodged.
