5–2
5.0 Maintenance & Troubleshooting
Teledyne Analytical Instruments
A Business Unit of Teledyne Electronic Technologies
5.1
Replacement of Sample Cell Optics
If it becomes necessary to remove the sample cell optics for cleaning,
proceed as follows (see dwg. C-14631):
1. Loosen the bulkhead nuts on the two Swagelok fittings located
on the bottom of the condulet.
2. Remove the four mounting screws that secure the backplate to
the condulet interior.
3. Remove the two top mounting screws for sample preheater.
4. Unclip heater assembly from top of the compartment.
5. Remove two bulkhead fittings for clearance, then remove entire,
wired backplate assembly. There is no need to remove the wire
connections to the terminal strips. However, observe caution
when removing backplate from condulet; make sure that wire is
not twisted or pulled from connections.
6. Disassemble sample cell (see Figure 5-2).
7. To reinstall the sample cell, reverse the removal/disassembly
procedure.
5.2
Replacement of Filter Wheel Optics
If it becomes necessary to replace filter wheel optics, or re-screen
filter(s), proceed as follows:
1. Remove four screws securing detector compartment cover;
remove cover from compartment.
2. Use long-handled Allen-head wrench (7/64") to remove filter
wheel from chopper motor shaft. Hold filter wheel steady, insert
wrench in sockethead screw, then rotate shaft to remove the
screw and washers.
3. Carefully remove the filter wheel. Make certain that filter is not
touched with fingers, scratched, or marred in any way. Oil from
the fingers, or merely a fingerprint on the filters, can seriously
degrade performance of the analyzer.