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 Problems”, page 10-20).
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 lengths
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
