35
Error
Cause Solution
Pipette is dripping;
the volume
dispensed is
incorrect.
– The tip may be loose.
– There may be foreign
matter between the
pipette and the tip.
– The piston, nose cone and
cylinder may be damaged
or contaminated.
– The lower part may be
loose.
– For multi-channel model:
The O-ring may be
damaged.
– Attach the tip firmly. Make sure that
an Eppendorf tip is used.
– Wipe the pipette. Ensure that the tip
is protected from dust.
– Treat the lower half of the pipette as
described in Sec. 6 and Part B
"Ordering Information/service
parts".
Residual liquid is
in the tip;
dispensing is
incomplete.
– See above.
– The dispensing speed
may be too high.
– The incorrect pipetting
option may have been
selected.
– See above.
– The procedure for checking the
function is described in Sec. 5,
"Operation".
Motor stops
during the
dispensing
procedure.
– The battery may be run
down.
– The pipette may be
heavily contaminated.
– Discard the dispensing as it is
incorrect. Recharge the battery
(Sec. 3.3) or treat the pipette as
described in Sec. 6.
Multi-channel:
Pipette doesn’t
aspirate liquid.
(Continued
on next page)
The magnetic coupling on the
multi-channel lower part no
longer works.
In the case of the Research
pro Pipette 4860, strong
impact stress can result in a
separation of the magnetic
connection between the
spindle and the piston
actuator. As a result of this
separation, the pipette no
longer aspirates liquid, despite
movement of the motor.
In order to reestablish the connection,
proceed as follows:
– Separate the ejector from the lower
part.
– To do this, press the lower part
against a surface until it springs in.
Simultaneously press the stop clutch
inward with side "B" of the universal
tool. The ejector cover panel springs
up.
Troubleshooting
7 Troubleshooting
7
1_E06 Pflege etc. Seite 35 Donnerstag, 9. Oktober 2008 7:21 19
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