Eppendorf Research plus User Manual download pdf (Page 12)

4 Troubleshooting

Eppendorf Research® plus — Operating manual

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• The tip is withdrawn from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 L, 300 L 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.

Troubleshooting

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Eppendorf Research plus User Manual Page 12

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