Problem Solutions - Thermo Scientific Finnpipette Bedienungsanleitung

13. Problem solutions

Symptom
Piston is stiff or does
not move at all
Suction or dispensing
is impossible
Liquid is leaking from
the gap between the
valve block and the
valves.
Possible cause
- Closure cap not open
- Crystallisation at the piston
or the valves
- Volume scale set on "0"
position
- Suction/ejection valve
sticking
- Valves loose or damaged
- 44 -
Solution
- Open the closure cap (see point 7.1) unit
- Stop dispensing and clean the thoroughly (see
point 8.2). If necessary, soak it for 24 hours in
a bath (e.g. with 20 % reasol cleaning solvent).
- Turn the adjusting ring to set the required
volume (see point 7.2 and 7.3).
- Clean the unit (see point 8.1)
- Shake the unit or tap the valve block against
the palm of the hand.
- If necessary, change the valves (see point 10).
- Tighten valves with the assembly wrench
Note: After sterilization (see point 9),
suction/ejection valves need to be
tightened.