3.6. Dispensing assembly
e dispensing pump assembly is comprised of three pumps. Each pump is independent and they are connected
to the reagent and sample arm tips.
e pistons of the two pumps for pipetting the reagent have a diameter of 8 mm, while the piston of the sample
pump has a diameter of 3 mm.
e uidic system of the three pumps with the input electro valves is comprised of a PMMA manifold (1).
In the uidic chamber of the sample pump the manifold has a pressure sensors that detects whether the sample tip
is blocked (3).
All three pumps are identical, except for the sample pump, in which the piston has a smaller diameter. ey are
operated by a motor (13) attached to a multi-twisting spindle (12). e spindle raises or lowers the piston support
(11) where it is attached to the piston. e suctioning chamber is sealed by a retaining element (10). e tubes are
connected to the manifold by connection ttings (7).
Figure 3.16 Dispensation pump assembly
6
4
2
5
1
3
Figure 3.17 Detail of dispensation pumps
13
12
10
7
9
11
8
Service Manual
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