VITLAB micropipette Mode D'emploi page 32

14.2. VITLAB micropipette 5 ml and 10 ml
®
1. 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
aspirate 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.
2. Disassembly and cleaning
1. Remove the entire shaft (S) from the handgrip 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:
Do not disassemble piston
unit (G) any further!
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.
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S
K
F
G
I
H
F´
(For illustration
purposes only)