Eppendorf Research plus - Manual (Page 12)

4 Troubleshooting
Eppendorf Research® plus — Operating manual
12
4 Troubleshooting
4.1 Error search
Symptom Possible cause Solution
Liquid is dripping from
the tip and/or the
dispensed volume is
incorrect.
•
The tip is loose or the
pipette tip is poorly fitted.
 Press the tip on firmly, use
epT.I.P.S. If using 5 mL and
10 mL epDualfilter T.I.P.S., do
not use protection filters in the
pipette.
•
Liquid with high vapor
pressure and/or different
density.
 Wet the tip several times and
adjust the pipette for the liquid
used.
•
Pipetted too quickly.  Move the control button slowly.
•
The tip is withdrawn from
the liquid too quickly.
 Slowly remove the tip with a
time delay (approx. 3 seconds)
from the liquid.
•
Liquid aspirated with
blow-out and dispensed
with blow-out.
 Repeat dispensing correctly.
•
The piston is soiled or
damaged.
 Clean the piston, relubricate
slightly and/or replace.
•
The tip cone is damaged.  Replace the lower part or
channel.
•
The O-rings of the tip
cones are damaged.
 Replace the O-rings (only
100 μL, 300 μL multi-channel).
The control button jams
and does not move
smoothly.
•
The piston is soiled.
•
The seal is soiled.
•
The pipette is blocked.
 Clean the lower part.
 5 mL and 10 mL sizes: replace
the protection filter.
The adjustment seal has
been removed; the
adjustment display has
been changed.
•
The pipette has been
adjusted for another
liquid.
 Adjust the pipette for the liquid
used (see Adjusting pipettes on
p. 22).
No spring-loading action
of the tip cone when
taking up pipette tips.
•
Spring-loading action is
blocked by a locking ring.
 Remove the locking ring again.
•
The use of a 5 mL or
10 mL pipette.
No remedy. The tip cone does not
respond with spring-loaded action in
combination with these sizes.
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