9-16 Chapter 9: Inspection and Maintenance 42/24-10 EN Rev. 9
Limas11: Safety Cell Cleaning, continued
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.
Qty. Description
For sample cell removal:
1 Hexagonal wrench 4 mm
1 Hexagonal wrench 3 mm
1 Crosshead screw driver 4,5 mm
1 Small flat nose pliers
2 Plugs for sealing the sample gas tubing
For disassembly and assembly of the sample cell:
1 Plug for sealing the sample cell
1 Open-end wrench 25 mm for sample cell with nominal length 216 mm
1 Open-end wrench 30 mm for sample cell with nominal length 216 mm
2 Open-end wrenches 30 mm for sample cells with other nominal length
1 Vise
1 “Vacuum pen”
1 Small pair of tweezers
Soft paper towels
For cleaning the sample cell and the sample gas tubing:
1 Circular brush with plastic bristles, diameter approx. 20 mm
2 Spray bottles
Neutral detergent, deionized water, ethanol
For drying: Oil- and dust-free (instrument) air or nitrogen
For the seal integrity test (positive pressure method):
1 Pressure gauge, measuring range p
e
= 0...400 hPa
1 Tee with shut-off valve
1 Hose, inside diameter 4 mm, length approx. 0.5 m
2 Hose clamps
Material Required
Oil- and dust-free (instrument) air or nitrogen
Qty. Description Part No.
2 O-ring seals 22.1x1.6 FFKM70 650 505
2 O-ring seals 28x2 FKM80 650 519
2 Windows of calcium fluoride 25.2x4 598 216
2 Vent plugs for sample gas tubing A 5.2 LDPE 456 894
Replacement Parts
Required
2 Plugs for sample gas tubing 402 541
Continued on next page
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