Analytical 3 Mm Flow Cells; Sop 11 Cleaning An Analytical 3 Mm Flow Cell - Knauer Smartlibe UV Detector 2500 Handbuch

Simple Maintenance

Analytical 3 mm flow cells

Fig. 31
SOP 11
embedded in the gasket and sealed against the flow path with a PFA
seal. This seal should be changed every time when disassembling the
flow cell.
3. Take out the lenses and clean them by wiping them with a soft cloth or
with an appropriate solvent in an ultrasonic bath. Be careful not to
touch the clean lenses with the fingers.
4. Reassemble the cell in the reverse manner, making sure that the PFA
seal does not block the light path.
5. Tighten the outer threads carefully with the spanner in order not to
damage the lenses.
Outer thread
Stainless steel shutter
Gasket holder
Light guide with
PTFE seal
Sectional view of an analytical 3 mm flow cell
Cleaning an analytical 3 mm flow cell.
This instruction applies to the analytical 3 mm flow cella A4042 and
A4045.
The 3 mm flow cells have a rod shaped light guide and one concave lens.
1. Unscrew the outer thread with a hexagonal spanner.
2. Take out the stainless steel shutter.
3. Get hold of the gasket holder with the light guide by grasping it with a
pair of tweezers, using the indentations on the outer side of the gasket
holder.
4. Push out the light guide and strip the PTFE sealing ring in order to
clean the lens.
5. Unscrew the second outer thread with the 3 mm hexagonal spanner
enclosed in the flow cell's delivery.
6. Remove the black gasket that carries the lenses with a pair of
tweezers or by gently tapping it on a clean surface.
7. Remove the PEEK plate.
8. Get hold of the gasket holder with the light guide by grasping it with a
pair of tweezers, using the indentations on the outer side of the gasket
holder.
9. Push out the light guide and strip the PTFE sealing ring in order to
clean the lens.
10. Reassemble the cell in reverse order. Use a new PTFE sealing ring
after every disassembly to ensure the consistence of the flow cell.
31
Gasket
Lens
PEEK-plate