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The table below lists possible problems and their solutions.
Defect
Leakage
Inaccurate
dispensing
Tip not ejecting
Piston jammed
Broken tip fitting
Dispensing knob
jammed to semi
down position
9. Troubleshooting
Possible reason
• Tip fitting incorrectly attached or
loose
• ClipTip clips are bent
• Tip fitting o-ring damaged
• Tip incorrectly attached
• Foreign particles between the tip
and the tip cone
• Foreign particles between the
piston, the O-ring and the cylinder
• Insufficient amount of grease on the
cylinder and the O-ring
• O-ring damaged
• Incorrect operation
• Tip incorrectly attached
• Calibration altered; caused by
misuse, for example
• Wrong tip
• Unsuitable calibration: a list of
factors is presented in Section 4.1
"Calibration and adjustment"
• Tip cone loose
• Pipette not serviced
• Tip fitting not properly attached
• Uneven tip ejecting with the
multichannel
• Pipette has been unused for a long
period
• Grease is removed while pipetting a
highly volatile solvent repeatedly
• Pipette dropped on the floor etc
• One sided force applied to the knob
when adjusting the volume with
one hand
Possible action
►Re-attach/tighten the tip fitting
or replace with new tip fitting(s)
using the tool.
►Discard the tip.
►Change the O-ring.
►Attach firmly.
►Clean the tip cones and attach
new tips.
►Clean and grease the O-ring and
cylinder.
►Grease accordingly.
►Change the O-ring.
►Follow the instructions carefully.
►Attach firmly.
►Recalibrate according to the
instructions.
►Use the correct tip.
►Readjust the pipette.
►Tighten the tip cone with the
service tool.
►Perform pipette service.
►Tighten the tip fitting.
►Tighten the tip fitting with the
tool or replace the tip fitting set.
►Remove the tip if attached.
Press the plunger to the second
stop and release several times
to re-apply the grease.
►Use the tip fitting tool to remove
the remaining part of the tip
fitting. Place the flat head end
of the tool 3 (picture 9) into the
remaining part of the tip fitting
and rotate counterclockwise
to unscrew the remaining part.
Assemble a new tip fitting.
►Pull up the knob and press down
again to locked position
17
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