Cassette sipper
14.3 Mounting the cassette sipper
14.3.1 Mounting the tube set
1 Sample aspirating tube 4 Tube cassette
2 Flow cell 5 Eccentric
3 Pump tube 6 Drain tube
Fig. 14-2 Tube set for cassette sipper
Mount the tube set as illustrated in Fig. 14-2:
1. Fasten the pump tube in the tube cassette by tensioning it between two stoppers.
2. Fix the sample aspirating tube to the flow cell. To this end, slip the Tygon
®
tube end
over the inlet connector of the cell (observe the marking indicating the direction of
flow on the cell). The black Viton
®
gasket must rest on the inlet connector and the
Teflon tube project into the cell. This is to prevent that a sample reservoir forms at
the inlet connector, which would cause measuring errors by carry-over.
3. Fix the pump tube with the tube adapter and the short silicon tube to the outlet
connector of the cell. In doing so, observe the proper direction of the tube cassette.
If the direction is wrong, the pumping direction will be wrong, too.
4. Use the tube adapter to interconnect pump tube and drain tube.
Insert the tube set in the sample holder:
5. Plug the cell retaining spring onto the place that corresponds to the pathlength of the
cell.
6. Insert the cell in the cell holder with the outlet connector facing the pump.
7. Fasten the tube cassette to the pump rollers (Fig. 14-1).
8. Press the pump tube to the rollers with the eccentric so that it is fully squeezed.
98 User’s Manual SPECORD 200/205/210/250 – Accessories 07/2005
Analytik Jena AG
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