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Flush and rinse these components with Isopropanol and then allow
them to air-dry thoroughly.
To quicken the drying process, apply a continuous flow of dry pres-
surized gas (e.g., air, nitrogen, carbon dioxide, or helium) through the
NOTE
flame arrestors. This will force out any remaining Isopropanol in the
flame arrestors and thoroughly dry the components.
8. Insert the original o-ring, if not damaged (or the new o-ring,
P/N 300-4511), by using your thumbs to push it into the o-ring groove
until it is completely seated in the groove.
9. Ensure the joining surfaces of the Sample Cell and Opto-Ring assem-
blies are clean. Clean them with a cotton swab or soft cloth soaked in
Isopropanol if necessary.
10. Replace the Measuring Cell. To do this, push the Sample Cell straight
up into the Opto-Ring Assembly, rotating it if necessary.
!
The tolerances between the two parts are very fine. Take care to avoid
binding them together, which can damage the o-ring.
CAUTION
When the Sample Cell assembly is fully seated in the Opto-Ring As-
sembly, rotate the Sample Cell so that the Sample inlet fitting (off-
centre) is closest to the front of the analyzer (i.e., it will be the furthest
away from the backpan when the Measuring Cell Assembly is secured
to the Electronics Enclosure).
Replace the (8) M6 X 20 screws that secure the Sample Cell to the
Opto-Ring Assembly. Using a torque screwdriver, tighten the screws
in a cross-pattern. The torque specification is 4.0 Nm, ±0.7 Nm (36 in.-
lb, ±9 in.-lb).
!
The Cooler Housing-to-Seal (on the Electronics Enclosure) and Heat-
sink Mounting Sleeve are flamepath areas. Take special care to avoid
CAUTION
scratching, indenting, or otherwise damaging these joining surfaces.
Carefully clean these areas with a cotton swab or soft, non-abrasive
cloth soaked in Isopropanol and allow them to dry thoroughly before
reassembly.
Maintenance and Troubleshooting
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6-15
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Table of Contents
Troubleshooting
