BRAND Transferpette S Gebrauchsanleitung Seite 31

Servicing and Cleaning
Servicing
Inspect the pipette tip cone for damage.
Inspect the piston and O-Ring-seal for contamination.
Test the instrument's piston seal. To do this, affix a tip, and aspi-
rate a sample. Hold the instrument vertically, with the sample in
the tip for approximately 10 s. If a drop forms at the tip orifice,
see the troubleshooting guide on page 36.
Disassembly and cleaning
1.
Remove the entire shaft (S) from the hand
grip by rotating at the upper end of the
ejector (F) and remove the filter (K) from
the bottom part of the shaft (H).
2.
Separate the bottom part of the ejector
(F') by unscrewing it from the upper
part of the ejector (F).
3.
Unscrew and dismantle the piston
unit (G) with the ejector spring (I)
and the bottom part of the shaft (H).
4.
Remove the O-Ring-seal from the
piston unit and clean it.
Note:
5.
Clean piston unit (G) and lower part of
pipette shaft (H) with a soap solution
or isopropanol and then rinse with
distilled water.
6.
Allow the parts to dry (max. 120 °C/
248 °F) and to cool down.
7.
Carefully lubricate the inside and outside
of the O-ring and mount it on the piston.
8.
Assemble the individual components in the
reverse order from that described above.
32
Do not disassemble piston
unit (G) any further!
® S 5 ml - 10 ml
Transferpette
S
K
(For illustration
purpose only)
F
G
I
H
F'