Instruction Manual
748441-D
April 2002
5-20 Maintenance and Service
Rosemount Analytical Inc. A Division of Emerson Process Management
Model CAT100
f.
Cleaning of Analysis Cells and Win-
dows
Windows:
The shielding windows on the filter cell,
chopper housing, and the adapter cell,
may be cleaned with a soft, lint-free cloth.
Use a highly volatile alcohol for the clean-
ing procedure. Remove any lint and dust
particles remaining by blowing off the
cleaned components with nitrogen.
Non-Divided Analysis Cells:
The analysis cell may be cleaned with a
soft, lint-free cloth. Use a highly volatile
alcohol for the cleaning procedure. Re-
move any lint and dust particles remaining
by blowing off the cleaned components
with nitrogen.
Divided Analysis Cells:
If deposits are visible in the analysis cell,
these can be removed with a suitable sol-
vents such as acetone. Then the analysis
cell is to be flushed with an alcohol which
evaporates easily and dried by blowing ni-
trogen.
NOTE
The maximum pressure in the analysis
cell is 1,500 hPa!
g. Reinstalling
Analysis
Cells
For analysis cells of 1 mm and 7 mm
length:
1. Place the O-rings on the adapter cell
and filter cell.
2. Fit the components together.
3. Install the clamping collars with the
clamp and tighten.
For analysis cells of 50 mm – 200 mm
length:
1. Place the O-ring on the chopper
housing side of the cell body.
2. Position the cell body in place and
fasten using the two mounting screws
as shown in Figure 5-13 (page 5-19),
item 4.
3. Place the O-rings on the filter cell.
4. Fit the filter cell on the cell body.
5. Install the clamp and tighten.
6. For an analyzer with a gas detector,
assemble the preamplifier to the
analysis cell.
7. Replace the photometer assembly as
described in Section 5-4h (5-20).
h.
Reinstalling Photometer Assembly
1. Insert the photometer assembly into
the analyzer housing and fasten in
position using the mounting bracket
screws as shown in Figure 6-13, item
1.
2. For an analyzer with a gas detector,
insert the preamplifier (Figure 5-13,
page 5-19, item 5) into the holding
device (Figure 5-13, item 4)
3. Reconnect all gas lines to the assem-
bly.
4. Reconnect all electrical connectors
between the photometer assembly
and the electronic unit (see Section 5-
5a).
5. Perform a leak check (see Sections 2-
3, page 2-11 and 6-2, page 5-6).
6. Perform the physical zeroing proce-
dure (see Section 5-4i, page 5-20).
i. Physical
Zeroing
Adjustment of the physical zero level will
only be required if a light source, a filter
cell, or an analysis cell have been re-
placed or repositioned.
The adjustment will required the use of a
digital voltmeter (DVM) with a range of 2
VDC and a 3 mm hexagon wrench.
