Maintenance - Thermo Scientific Finnpipette Novus Bedienungsanleitung

Imprecision (random error)
Imprecision refers to the repeatability of the pipettings. It is expressed as standard deviation (s)
or coefficient of variation (cv)
Standard deviation can be expressed as a relative value (CV)
CV = 100% x S / V
When the Finnpipette Novus is not in use, make sure it is stored in an upright position. We
recommend a Finnpipette stand for this purpose.
The part # refer to exploded views beginning at page 86.
Daily checking
The pipette should be checked at the beginning of each day for dust and dirt on the outside
surfaces of the pipette. Particular attention should be paid to the tip cone. No other solvents
except 70 % ethanol should be used to clean the pipette.
Short-term Service
If the pipette is used daily it should be checked and lubricated every three months. The servicing
procedure starts with choosing the Service-mode from the menu (Menu -> Options -> Service).
1. Note that the tip ejector button is in fully up position.
2. Pull down the tip ejector part of the module and remove the tip cone module by pulling it
out (snap fitting).
3. Pull out the Colour Ring 15. Open the upper end of the tip ejector slightly and remove the tip
ejector. Pull out the module spring and clip 22.
4. Use a screwdriver to remove the four/six screws in the module cover and lift off the cover.
5. Remove the piston bar and clean the pistons and tip cones with a dry nap–free cloth.
6. If needed, replace the o-rings as described in Long-term Service
7. Grease cleaned pistons with the lubricant provided in the pipette package.
8. Install the piston bar with pistons and tip cones in the cover and close the cover with the
four/six screws. Insert the clip 22.
9. Place the tip ejector and module spring on the neck of the module. Press the spring
below the tip ejector. Close the tip ejector with the Colour Ring.
10. Push the tip cone module back to the handle while holding the ejector down, until you
hear a "click".
11. Press trigger to reconnect the piston to drive mechanism.
12. Press READY to return from service mode.
Long-term service
If the pipette is used daily it should be serviced every six months. The servicing procedure starts
with the disassembly of the pipette. The servicing procedure starts with choosing the Service-
mode from the menu (Menu -> Options -> Service).
1. Note that the tip ejector button is in fully up position.
2. Pull down the tip ejector part of the module and remove the tip cone module by pulling it
out (snap fitting).
3. Pull out the Colour Ring 15. Open the upper end of the tip ejector slightly and remove
the tip ejector. Pull out the module spring and clip 22.
4. Use a screwdriver to remove the four/six screws in the module cover and lift off the cover.
5. Remove the piston bar and clean the pistons and tip cones with a dry nap–free cloth.
6. 100-1200 µl: Pull out the tip cones from the pistons. Clean the cylinders 30, pistons and
seal rings. If the seal ring is damaged, the whole piston assembly 31 must be replaced.
Grease the seal rings and cylinders, avoid using too much lubricant. Install the cylinders
back on the pistons.
s = standards deviation
v = mean volume
n = number of measurements

Maintenance

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