42/24-10 EN Rev. 9
Chapter 9: Inspection and Maintenance
9-15
Limas11: Safety Cell Cleaning
Description of the
Safety Cell
The safety cell comprises three components:
•
Sample cell of stainless steel 1.4571,
•
Beam guide tube 1 of brass (on the side pointing to the beam splitter),
•
Beam guide tube 2 of brass (on the side pointing to the measuring detector).
The beam guide tubes are screwed into the sample cell and press the cell windows
against the chambered 22.1x1.6 FFKM70 O-ring seals. In this manner, the sample
gas side of the cell is sealed so that it is gas-tight. One 28x2-FKM80 O-ring seal is
located on the periphery of each of the beam guide tubes. The purge gas chamber
is sealed so that it is gas-tight to the outside by means of this seal.
The tightness of the sample cell has been tested in the factory for a leakage rate
of < 1 x 10
–6
mbar l/s.
Fig. 9-9
Safety Cell
in the Limas11
Analyzer Module
3 4
2
1
5
6
7
8
6
5
9
Fig. 9-10
Safety Cell
10
11
7
3
4
2
9
1
Couplings of the
Purge Gas Lines
2
Plugs
3
Retaining Board
4
Screw
5
Screws
6
Mounting Bracket
7
Purge Gas Hose
8
Fixing Device
9
Sample Cell
10
Beam Guide Tube
11
Beam Guide Tube
Continued on next page
