TSI Instruments DustTrak 8540, Operation And Service Manual

Page: 53 / 78

Maintenance 43
Replacing the Internal Sheath Air (HEPA) Filter
TSI
®
recommends replacing the
internal sheath air filter after
every six months of use.
1. Turn the instrument off.
2. Open Instrument Service
Panel (Figure 20).
3. Disconnect and remove old
sheath air filter from the
instrument (Figure 21).
Figure 20: Open instrument
service panel
Figure 21: Disconnect and remove old sheath air filter
4. Replace with new filter (PN
854044). Ensure tubing
coming
from the “Y”
connects to the inlet side of
the filter as indicated by the
Flow arrow (Figure 22).
Figure 22: Replace with new filter