Manual

5 Maintenance
16
Eppendorf Research® plus — Operating manual
5.2.2 Disinfection
 Carefully wipe off the outer surfaces with disinfectant, DNA/RNA decontamination agents or
70% isopropanol.
 You can wipe the outside of the tip cone and the ejector sleeve with a sodium hypochlorite
solution of 4%.
 After the exposure time of the sodium hypochlorite solution has elapsed, remove thoroughly
with demineralized water.
The Research plus pipettes may be temporarily subjected to the UV light of a sterile bench ( ≥254
nm).
5.3 Replacing O-rings
The 100 L and 300 L multi-channel lower parts are equipped with O-rings. These are wear
parts. Replace old, worn or damaged O-rings. Defective O-rings result in the incorrect positioning
of the tips and in dispensing errors.
5.3.1 Removing the O-ring
1. Push the opening of the O-ring tool (included in the delivery package) against the tip cone
from the side so that the sharp edge in the opening of the O-ring tool is positioned on top of
the o-ring. Do not slide the O-ring tool onto the cone!
2. Supporting the O-ring tool with your thumb, push it firmly against the tip cone.
This O-ring is cut in one place.
3. Remove the O-ring tool and the O-ring from the tip cone.
5.3.2 Mounting a new O-ring
1. Fit the mounting aid (shortened pipette tip, included in the delivery package of the O-rings)
on the tip cone.
2. Push the new O-ring over the tip onto the tip cone.
3. Check that the pipette tips are correctly positioned. Ensure that the tips are tightly sealed and
properly aligned.
5
Maintenance