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Troubleshooting
The motor sounds rough and aspiration is very slow.
Probable Cause
The pipette has been set to a
slower speed.
Motor has not been used for an
extended period.
After reassembly, the pipette leaks or does not fill liquid.
Probable Cause
O-ring was not properly seated.
O-ring was damaged during
reassembly.
Tubing was disconnected from
tip fitting or cylinder.
30
Recommended Solution
Verify speed setting, the slower speed
settings causes the motor to run slowly
and louder than usual.
Cycle the unit (fill and dispense) five to
seven times to relube the piston.
Recommended Solution
Disassemble the pipette and reseat the
O-ring. (See Section F.1 and/or F.2 for
pipette disassembly/reassembly).
Replace the O-ring. (See Section E.2.2,
Pipette Cleaning and Autoclaving
(Relubrication step) and Section E.2.3,
Pipette Reassembly).
Disassemble the pipette and reattach
the tube. If tube fits poorly, it may have
stretched and needs to be replaced or
trimmed of stretched section.
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