SKC 225-70A IOM Inhalable Dust Sampler with MultiDust Foam Discs - Manual (Page 5)

5
Filter Cassette: Opening, Installing Filter, and
Closing (Figure 4)
1. Separate the cassett e top from the cassett e bott om.
a. Plastic cassett e: Use gentle pressure to separate
the two halves of the plastic cassett e (Figure 4).
b. Stainless steel cassette: Twist cassette top in
cassett e bott om until notch on cassett e top aligns
with bump on cassett e bott om. Pull straight up.
2. Place a fi lter into the cassett e bott om (on the support grid)
and insert cassett e top into cassett e bott om.
a. Plastic cassett e: Snap the plastic cassett e top into
the cassett e bott om, ensuring a tight fi t.
b. Stainless steel cassett e: Align the notch in
the cassett e top with the bump in the cassett e
bott om, set top into bott om, and twist top to secure.
Pre-weighing Cassette for Inhalable Gravimetric Sampling
1. Equilibrate cassett e and fi lter as indicated in General Weighing
Guidelines on page 4.
2. Wipe the external surface of a loaded IOM cassett e with a
clean lint-free paper, cloth, or soft brush.
3. Pre-weigh the fi lter inside the IOM cassett e as a single unit
(Figure 5).
4. Note the result and assign a reference number or lett er to the
cassett e or complete IOM sampler (cassett e inside housing
body).
Note: The cassett e cover (Figure 6) can be included in
pre and post-weighing as part of the complete cassett e,
if required, but must be referenced to the cassett e used.
Pre-weighing Cassette for Inhalable and Respirable Gravimetric
Sampling
1. Equilibrate cassett e, fi lter, and foam as indicated in General Weighing Guidelines
on page 4.
2. Wipe the external surface of a loaded IOM cassett e with a clean lint-free paper,
cloth, or soft brush.
3. Using forceps place a fi lter into the cassett e bott om and weigh.
4. Record pre-weight #1 and assign a reference number or lett er to the cassett e or
complete IOM Sampler (cassett e inside a housing body).
Figure 5. Weigh
cassette with fi lter
on a fi ve-fi gure
balance.
Figure 6.
Cassette with
cover
Figure 4.
Exploded cassette
Cassette
top
Filter
Cassette
bottom