35
Maintenance and Care
KNAUER
10D User Manual V7670, Version 2.3
Cleaning the Light Guide of a Preparative Flow Cell
Prerequisite
Device has been switched off.
Power plug has been pulled.
Flow cell has been removed.
Tools
Tweezers
Allen screwdriver, size 3
Procedure
1. Using the screwdriver, loosen the threaded ring
1
.
2. Remove the cover
2
and the spacer
3
(not part of all flow
cells).
3. Using the tweezers, pull out the compression bushing
4
and
the light guide
5
.
4. Carefully push the light guide out of the holder and strip off
the seal. The seal ring needs to be renewed during every
cleaning of the fiber optics.
5. Clean the light guide with a clean, soft cloth or with an
appropriate solvent in an ultrasonic bath. Make sure that the
clean light guide is not touched by fingers.
6. Afterwards, assemble the flow cell and make sure that the
new seal ring does not interrupt the light path.
7. Using the screwdriver, tighten the threaded ring
1
.
Result
Flow cell can be assembled.
What to do when...
If the cleaning does not have the desired effect, the light guide
has to be replaced.
Legend
1
Threaded ring
2
Cover
3
Spacer
4
Compression bush-
ing
5
Light guide with
seal ring
Fig. 24
Preparative flow cell
1
2
3
4
5
