Troubleshooting - BRAND Transferpette S Operating Manual

Troubleshooting

Problem
Tip dripping
(instrument leaks)
The instrument does
not aspirate or as-
pirates too little; the
discharged volume
is too low.
Aspiration is
too slow
Discharged volume
is too large
Piston is difficult
to move
46
Possible cause
Unsuitable tip
Tip not seated tightly
Seal contaminated
The seal or cone is
damaged
The piston is contami-
nated or damaged
Shaft clogged
The filter in the 5 ml
and 10 ml models is
contaminated
Pipetting button
pressed too far into
the blow-out position
before sample uptake
The piston is contami-
nated or needs oil
Corrective action
Only use high-quality
tips
Press tip on firmly
Clean seal
Replace seal or shaft
Clean or replace piston
Clean shaft
Change the filter
Operate properly.
See 'Pipetting',
page 32.
Clean and oil the piston