Metrohm 800 Dosino - Manual (Page 32)

5.2 Problems when attaching the Dosino ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
24 ￭￭￭￭￭￭￭￭ 800 Dosino
5.2 Problems when attaching the Dosino
If the 800 Dosino cannot be attached (Status LED does not light up), then
it could be that either the drive disc of the Dosino or the centering tube of
the dosing unit is not in exchange position (Port 2) (see Figure 12, page
19). The drive pin of the Dosino must fit into the recess on the dosing unit
intended for that purpose. Observe the preceding illustrations.
Caution
The stopper of the dosing piston(see Figure 15, page 22) must be flush
with the upper edge of the dosing unit.
Adjusting the dosing piston
Figure 17 Piston tongs
Note
Use caution when handling the 2 mL cylinder! In contrast to the larger
dosing cylinders, here the dosing cylinder can be pulled out completely.
Adjust the dosing piston as follows:
1 Press down on the white grip of the piston tongs.
Two wire loops will appear at the tip of the piston tongs.
2 Arrange the piston tongs in such a way that these wire loops sur-
round the piston stopper.
3 Carefully let go of the grip.
The piston tongs snap shut.
4 Carefully pull out the dosing piston with the white grip, applying a
certain amount of force while doing so, until the gray upper edge
becomes visible.
5 Release the piston tongs by pressing on the white grip.