Instruction Manual

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