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Maintenance
12-Channel
8-Channel
Note: If the cross tube orientation between the cylinder and tip fittings is
incorrect, reassembly of the pipette will be impaired.
3. Installing Piston/Cylinder Assembly
Carefully insert the flat end of the motor screw into the hole of the motor
coupling. This can be accomplished by holding the piston/cylinder assembly
at a slight angle while inserting the motor screw into the hole of the motor
coupling. Slowly spin the motor screw until the flat end of the motor screw is
fully engaged into the motor coupling hole (see Figure F.1.4c). The cylinder
can now be seated between the plastic ribs in the main housing.
NOTE: The lot number on the face of the cylinder should be facing toward
you and the painted section of the piston backplate should be facing the
photosensor. The painted section is used by the photosensor to track the
location of the pistons.
38
1
2
3
4
1
2
3
4
1
2
3
4
Table F.1.4: Cylinders
Figure F.1.4b: Cylinder/Cross Tube Positions
Tip Fitting Positions
5
6
7
5
6
7
5
6
7
8
9
10
11
8
9
10
11
8
12
12
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