42/24-10 EN Rev. 9 Chapter 9: Inspection and Maintenance 9-19
Limas11: Safety Cell Cleaning, continued
Step Action
Cleaning the Sample Cell and Sample Gas Tubing:
16 Clean the sample cell with a warm detergent/water mixture. If
necessary, use a circular brush with plastic bristles.
Clean the sample gas tubing in the same way. To do this, use a spray
bottle to rinse the sample gas tubing with the detergent/water mixture.
In the case of heavier contamination, the following can also be
used as a cleaning agent:
– organic solvents or
– in turn, diluted soda lye, water, diluted nitric acid for
neutralization, water.
17
When using acids, lyes or solvents, please follow the relevant
safety and disposal regulations!
18 Check that the contamination has been removed.
19 Rinse the sample cell and sample gas tubing thoroughly with deionized
water, until the detergent has been completely washed out. Afterwards,
rinse with ethanol, until the water has been washed out.
20 Dry the sample cell and sample gas tubing with oil- and dust-free air
(30–100 l/h).
Clean the entire sample gas line system in the same way!
Sample Cell Installation:
1
11
Carry out steps 21 to 23 on both sides of the sample cell in turn.
Insert a new O-ring seal 22.1x1.6-FFKM70 12 in the sample
cell.
21
The seat of the O-ring seal may not be damaged and
must be absolutely free of oil and dust.
12
Check that the sample cell is not damaged!
Insert the cell window into the sample cell by means of the “vacuum
pen” pipette.
22
When doing so, take care that the cell window does not fall out
and that it is not damaged!
Insert a new O-ring seal 28x2-FKM80 13 into the groove of
the beam guide tube and screw the beam guide tube
fingertight into the sample cell.
23
Screw in the shorter beam guide tube 10 into the
side of the sample cell, on which the apertures of the
sample gas tubing are located.
1
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