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TE-WILBUR OPERATIONS MANUAL REV 002.15 06/11/2015
Tisch Environmental 1-TSP-AND-PM10 sales@tisch-env.com www.tisch-env.com Page 119 of 183
13.6 Filter Holder Maintenance
The filter holder is maintenance free with the exception of tightening or
loosening the mechanism if the system should become loose or is having an
issue passing a leak check.
There are o-rings on the top and bottom mate pieces that seal the filter
cassette, inspect these for wear or damage if there appears to be a leak.
Replace if needed. Tisch Environmental part number TE-W-FH6 for (2) filter
holder o-rings.
To replace the filter holder o-rings:
o Remove the filter holder from the enclosure by removing the
downtube, the four bolts on the filter holder plate and disconnecting
the sample tubing to remove the filter holder from the enclosure.
o Remove the 6 screws on the top of the filter holder to remove the top
mate piece.
o The o-ring can be removed with a small thin flat-blade screwdriver by
pushing the screwdriver into the o-ring groove and prying the o-ring
from the groove.
o Replace with a new o-ring and push the o-ring into the grove with your
finger, ensure it gets seated entirely.
o Using the small thin flat-blade screwdriver pry the bottom mate o-ring
from the groove.
o Replace with a new o-ring and push the o-ring into the grove with your
finger, ensure it gets seated entirely.
o Place top mate back on top of the filter holder aligning the 6 holes and
secure with the 6 bolts.
The filter holder should be cleaned on a monthly basis to keep stray
particulate matter from affecting sampling results. The inside of the bottom
and top mate and the top tube can be cleaned with distilled water or a general
purpose cleaner and a soft cloth.
See section 4.4, adjusting the filter holder for information on making
adjustments to the filter holder mechanism.
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