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5. Remove the eight (8) M6 X 20 screws securing the Measuring (Sample) Cell
6. If the o-ring (Part No. 300-4511) is still present in the Measuring Cell, re-
7. If the interior of the Measuring Cell is severely contaminated, wash it and
PN 903-8797, Rev A
to the Opto-Ring Assembly.
Remove the Measuring Cell from the Opto-Ring Assembly by rotating and
pulling it straight out from the Opto-Ring Assembly.
The tolerances between the two parts are very fine. When removing
the Measuring Cell, take care to avoid binding them together, which
can damage the o-ring.
move it using an o-ring removal tool or a small, blunt instrument to avoid
damaging the groove.
If the o-ring sticks to the epoxy mirror support, remove it from the
support using only your fingers. Do not use a sharp probe as it can
damage the o-ring, o-ring groove, mirror support, or mirror.
Inspect the o-ring for damage, such as nicks, cuts, or scratches. Typically,
AMETEK recommends replacing the o-ring any time the Measuring Cell is
disassembled.
The mirror support is an epoxy resin, the optic-path windows are
made of polycarbonate, and the Measuring Cell and mirror are made
of aluminum. Do not use any solvents that may damage these materi-
als. Isopropanol is a suitable cleaning agent.
Take care to avoid scratching or otherwise damaging the mirror
surfaces. If it is scratched or damaged, it will have to be replaced to
ensure accurate measurements.
the mirror support using cotton swabs and a diluted solution of a non-
abrasive agent (such as Isopropanol). Gently wipe the mirror surfaces with
cotton swabs soaked in Isopropanol. Clean the sample gas inlet and outlet
channels.
Maintenance and Troubleshooting | 4-19
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Table of Contents
Troubleshooting
