Troubleshooting - BRAND Transferpette S Operating Manual

11 Troubleshooting

Problem
Tip dripping (instru-
ment leaking)
The instrument
does not aspirate or
aspirates too little;
the dispensed vol-
ume is too low
Aspiration is very
slow
Dispensed volume
too large
Piston sluggish
Transferpette® S 9974 88 V1
Possible cause
Unsuitable tip
Tip not seated tightly
Seal contaminated
Seal or cone is dam-
aged
Piston is contaminated
or damaged
Shaft is clogged
Filter contaminated on
2 ml, 5 ml or 10 ml in-
struments
Pipetting button
pressed too far (to the
over-stroke point) be-
fore aspirating
Piston is contaminated
or not greased
11 Troubleshooting
Corrective action
Only use high-quality
tips
Firmly press tip on
Clean seal
Replace seal or shaft
Clean or replace piston
Clean shaft
Change filter
Ensure proper han-
dling.
Clean piston and apply
grease
Operating manual
57