AS9N010B.STB AS-93plus Service Manual.fm - LIQUID-scan GmbH ...

Fitting pump tubes to the rinse pump
1. Swing the cam lever fully
clockwise to release the
pressure block.
2. Pull the pressure block off
the pivot.
3. Fit the rinse feed pump
tube:
1. Hook a collar into the
inside channel of a
retaining hook, using
the correct slot for the
diameter of the tube.
2. Gently tension the pump
tube around the pump
rotor and hook the
second collar into the
inside channel of the
other retaining hook.
Do not twist or kink the
pump tube.
4. Fit the drain pump tube:
1. Repeat substeps 1 and
2, above, to fit the drain
pump tube to the
outside channel of the
retaining hooks.
Collars
5. Place a drop of silicone oil on the pump tubes in contact with the pump
rollers to reduce wear.
6. Slide the pressure block back onto the pivot.
Retaining hook
Retaining hook
Cam lever
Pressure
block
7. Swing the cam lever anti-clockwise to press the pressure block
against the pump tubes.
The final position of the cam lever depends on the pressure that is
required on the pump tubes for satisfactory operation (the “3 o’clock”
position is usually about right). Check the flow of liquid through the
rinsing port when the pump is operating. If the flow is intermittent or
inadequate, increase the pressure on the pump tubes with the cam
lever. The lifetime of the pump tubes will be shortened if the pressure
is too high.
Note: Release the pressure on the pump tubes during longer pauses in operation (e.g.
overnight) to prolong the lifetime of the pump tubes.
Make sure that the inner diameter of the drain pump tube is the same as, or larger than,
the rinse feed pump tube. If the drain pump tube has a smaller inner diameter, rinse
liquid will back up in the rinsing port and ultimately overflow into the autosampler,
possibly causing damage.
38 of 68 AS9N010B.STB
Pivot
Pump tube
Pump
rotor