42/24-10 EN Rev. 9
Chapter 9: Inspection and Maintenance
9-13
Limas11: Quartz Sample Cell Cleaning,
continued
Step Action
Sample Cell Cleaning:
Wash the sample cell with a warm detergent / water mixture.
Acids, alkalis or solvents can be used as cleansers in case of
severe contamination.
7
Be sure to follow the appropriate instructions for use and
disposal when using acids, alkalis or solvents.
Do not use hydrofluoric acid (HF) as it can destroy the sample
cell.
8
Rinse the cell very thoroughly with deionized water until the detergent
is completely removed. Finally, rinse the cell with ethanol until all
water is removed.
9
Dry the sample cell with oil- and dust-free air (30-100 liters/hour).
10
Check that the contamination has been removed.
Also clean the elbow fittings and the sample gas line system.
Sample Cell Installation:
11
Place new FFKM75 O rings
7
on the sample cell connection ports.
Place the internal parts
8
of the elbow/pivot fittings on the connection
ports and tighten them by hand. Place the elbows
9
on the internal
parts with their ports facing toward the housing back wall and secure
them by hand-tightening the nuts
10
.
12
The threaded connections must never be tightened any more
than hand-tight. Otherwise the connections may not be
securely sealed.
13
Place the sample cell
6
in its holder with the gas ports pointing to the
left wall (as seen from the front / above).
14
Install 2 mounting brackets
4
– making sure that the notches for the
sample cell gas lines also face the left wall – and secure with 4 screws
3
.
Connect the sample gas lines to the sample cell.
Push the sample gas tubes
2
through the threaded fittings
1
on the
housing back wall.
15
Make sure the sample gas lines are smooth and straight on
both ends and that there are no kinks.
16 Slide
nuts
13
, cutting rings
12
and sealing rings
11
on the sample gas
pipes
2
.
Slide the sample gas tubes
2
up to the stop in the elbow/pivot fittings
5
on the sample cell and high-tighten nuts
13
. Hand-tighten the nuts
on fittings
1
on the housing back wall.
17
The threaded connections must never be tightened any more
than hand-tight. Otherwise the connections may not be
securely sealed.
Check the integrity of the analyzer module gas paths (see page 9-2).
18
Remember the higher seal integrity requirements.
Continued on next page
