KBW (E6) 11/2016 page 119/147
20.2 Replacement of the fluorescent tubes
The average life expectancy of the fluorescent tubes is about 10,000 hours. We recommend replacing the
tubes every year in order to ensure full light intensity.
To replace the fluorescent tubes, unscrew and remove the clamping strips resting against the glass plate
(Allen screwdriver). Then lift the plate from the cassette. Rotate the tubes by 90° and pull them out of their
holders. When setting in the new tubes, observe the tube orientation (inscription, Figure 18). Fix the glass
plate and then screw in the clamping strips.
Figure 23: Dismounting a light cassette
Always replace all the fluorescent tubes of a light cassette together. Otherwise, homogeneity of
light intensity cannot be ensured.
20.3 Cleaning and decontamination
Clean the chamber after each use to avoid potential corrosion damage by ingredients of the test material.
DANGER
Electrical hazard.
Danger of death.
∅ Do NOT spill water or cleaning agents over the inner and outer surfaces.
Before cleaning, turn off the chamber at the main power switch and dis-
connect the power plug.
Completely dry the appliance before turning it on again.
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