Troubleshooting - VITLAB micropipette Mode D'emploi

17. Troubleshooting

Problem
Tip dripping
(instrument leaks)
The instrument does not aspi-
rate or aspirates too little; the
discharged volume is too low
Aspiration is too slow
Discharged volume is too large
Piston is difficult to move
36
Possible cause
- Unsuitable tip
- Tip not seated tightly
- Seal contaminated
- The seal or cone is damaged
- The piston is contaminated 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 contaminated 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 25.
- Clean and oil piston