Emerson Rosemount CT4400 Reference Manual page 90

Troubleshooting and diagnostics
January 2020
18. Refit the cell cover (C) onto the analysis cell (B) and secure with the six socket head
19. Close the hinged PCB tray and secure in position using the two cam lock screws.
20. Refit the top cover and reinstall the analyzer in the rack.
90
Figure 7-22: Cleaning the Lens
NOTICE
The flow of gas through the cell means that any water droplets introduced into the
system will travel through the cell to the front mirror; therefore, it is the front mirror
that is more likely to be contaminated. The mirrors are coated with enhanced nickel
and should be clean and reflective. Cleaning the mirrors with methanol may not
visibly improve the mirror surface but should improve reflectivity in the mid-
infrared band used by the lasers.
cap screws and washers (D) removed previously.
Reference Manual
00809-0100-4244
Rosemount CT4400