PN 903-8797, Rev A
5. Remove the six (6) M6 x 50 screws and carefully separate the Filterblock
into three sections.
6. Inspect both Membrane Filters for damage, particulate, and liquid, oils, or
waxes.
The High-Flow Membrane Filter is bonded to its o-ring – do not at-
tempt to separate them. If they become separated, replace them
with new parts.
The Type-5 Membrane Filter and its o-ring are two separate pieces.
These parts can be re-used (after they have been cleaned) if only
liquids are found. However, if they are damaged (are creased, have
holes, or are transparent) or if liquids have been forced through them
(liquids, oils, or waxes are present in the lters), replace with new parts.
If there is liquid, oil, or wax in the lter sections of the Filterblock, you
may also need to clean the Measuring Cell, mirror, and tubing be-
tween the Filterblock and Measuring Cell.
When removing o-rings or parts with o-rings, use an o-ring removal
tool.
Carefully remove the one (1) High-Flow Membrane Filter and its attached
o-ring (Part No. 300-5862, c/w #216 o-ring) from the Center Filterblock.
Carefully remove the one (1) Type-5 Membrane Filter and its o-ring (Part
No. 300-8594, c/w #216 o-ring) from the Back Filterblock.
7. Carefully remove the two (2) small #006 o-rings (Part No. 300-6244) and
two (2)Sintered Disks from the Center and Back Filterblock sections.
8. Remove the 50 cc/minute Flow Restrictor tting (Part No. 300-6245), the
1/8-NPT Plug (Part No. 300-5774), and the Male Connector (Vent to Flare,
Part No. 300-1239) from the three Filterblock sections.
Remove the three (3) 15 cc/minute Flow Restrictors (one on each section).
Be careful not to damage the 1/8” NPT threads. Remove the three (3) #008
o-rings, one from each Flow Restrictor.
If previous sample gas ow rates suggest possible plugging of the
Filterblock Flow Restrictors are plugged, replace them with new ones.
Maintenance and Troubleshooting | 4-25
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