Instruction Manual – 19
Problem
Cause
Solution
The pipettor
incorrectly
aspirates
the liquid
or the liquid
drops out
from the tip.
The plunger or the
O-ring is damaged due
to prolonged aspiration
of corrosive liquids.
Disassemble the
shaft set; wash the
shaft, the plunger and
the seal (Section 10:
Cleaning). Replace the
elements with new
ones if necessary.
Apply a small amount
of lubricant onto
the plunger and
reassemble the set
in the correct order.
The inside of the pipettor
is contaminated.
The sealing elements are
not sufficiently lubricated.
Uneven
work of the
pipetting set,
the pipetting
pushbutton
gets blocked.
The inside of the pipettor
is contaminated due to
aspiration of corrosive
substances.
Unscrew the shaft
set, wash the parts.
Replace the elements
with new ones if
necessary. Apply
a small amount
of lubricant on
the plunger and
reassemble the set
in the correct order.
The inside of the pipettor
is contaminated due to
the liquid entering the
pipettor.
The sealing elements are
not sufficiently lubricated
(e.g., after repeated
autoclaving procedures).
Incorrect
aspiration.
Liquid with properties
other than water (density,
viscosity).
Calibrate the pipettor
using the liquid which
is to be pipetted.
Tips with a filter with
increased flow resistance.
Calibrate the pipettor
using the tips which
are to be used for
pipetting.
If the problem persists after carrying out the above steps,
contact our regional representative.
Before returning the pipettor, please ensure the pipettor
is completely free of any chemical, radioactive, or
microbiological contamination which could pose a threat
during transport and repair.