TSI Instruments DustTrak 8540, Operation And Service Manual

Page: 60 / 78

Chapter 5 50
3. Inspect top inlet fitting
and blue cassette
holder for broken
pieces or missing seals
(Figure 34).
4. Install a blank cassette
for DustTrak
™ monitor
operation or a pre-
weighed, 37-mm,
2-piece, conductive
cassette with the
appropriate filter media
for the analysis to be
performed.
Figure 34: Inspect top inlet fitting and
blue cassette holder
5. Make sure the Cassette snaps securely into the inlet port on the
top of the cassette holder and the bottom clip snaps securely into
place. If the connection is loose, air will leak resulting in
inaccurate sampling results (Figure 35).
Figure 35: Snap cassette securely into inlet port