Instruction Manual
748441-D
April 2002
5-18 Maintenance and Service
Rosemount Analytical Inc. A Division of Emerson Process Management
Model CAT100
d. Light
Source
Replacement
1. Remove the analyzer from the enclo-
sure (see Section 5-2a, page 5-3)
2. Remove the analyzer cover (see Sec-
tion 5-4b, page 5-16)
3. Remove the photometer assembly
from the analyzer housing (see Sec-
tion 5-4c, page 5-17)
4. Remove the two light source mount-
ing screws and the temperature sen-
sor show in Figure 5-12 (page 5-17)
as item 5 and item 3 respectively.
5. Remove the light source together with
its mounting flange.
6. Remove the mounting flange from the
light source and position it on the new
light source.
7. For sealed version with pyroelectrical
detector only, remove the zero-level
adjustment baffle from the light
source and position it in the new light
source.
8. For sealed version only, place the O-
rings on the adapter cell and filter cell.
9. Insert the new light source and flange
in the same position as the old one.
10. Insert and tighten the two light source
mounting screws and the temperature
sensor shown show in Figure 5-12
(page 5-17) as item 5 and item 3
respectively.
11. Replace the photometer assembly in
accordance with Section 5-4c, page
5-17.
12. Perform the physical zeroing proce-
dure in Section 5-4i, page 5-20.