9-12 Chapter 9: Inspection and Maintenance 42/24-10 EN Rev. 9
Limas11: Quartz Sample Cell Cleaning
When should the
sample cell be
cleaned?
Sample cell contamination can result in unstable measurement values due to low
lamp intensity (see “Limas 11 P rob lems” , p ag e 10 -2 0).
Status Messages When beam intensity becomes too low the appropriate status messages will be
displayed. For additional information see the “Status Messages” section,
page 10-13.
Quantity Description
For cleaning: Neutral detergent, deionized water, ethanol
For drying: Oil- and dust-free (instrument) air or nitrogen
1 Spray bottle
2 Plug to close off sample cell
Material Required
1 Spare parts kit (part number 0768823)
CAUTION!
The quartz sample cell should be handled with extreme care! Especially the
connection ports can easily break when the sample cell is handled improperly.
Step Action
Preparation for sample cell removal:
Quartz Sample Cell
Cleaning
(See Fig. 9-7 and 9-8)
1
Turn off the sample gas supply to the analyzer module.
Turn off the gas analyzer power supply.
Open the wall housing door or the 19-inch housing cover. 2
The sample cell is hot (approx. 55 °C)!
Sample cell removal:
Loosen the sample gas pipes 2 from the connections on the sample
cell 5 and from the housing back wall 1 and pull them from the
housing. Save the nut, cutting rings and sealing rings for reinstallation.
3
When removing the sample gas pipes make sure no contami-
nants contained in the pipes fall into the housing.
The sample gas pipes removed should not be reused since they
are contaminated; follow the appropriate rules for disposal.
4 Loosen 4 screws 3 (3-mm Allen screws) and remove 2 mounting
brackets 4.
5 Remove the sample cell 6 from its housing.
6 Unscrew the elbow / pivot fittings 5 from the sample cell.
Continued on next page
To Next Page
Loading...
