BRAND Transferpette electronic Mode D'emploi page 58

Servicing and Cleaning
In order to assure proper funtioning, the Transferpette
electronic should be serviced and cleaned at regular
intervals.
Servicing
Inspect the pipette tip cone for damage.
Inspect the piston and seal for contamination and dam-
age.
Test the sealing of the instrument. To do this aspirate a
sample, and then hold the instrument in a vertical position
for about 10 sec. If a drop forms at the tip orifice, see the
troubleshooting guide on page 63.
Disassembly and cleaning
1.
Press both snap-in locks (J ) simultaneously and
remove lower part of ejector (G').
2.
Unscrew and remove the pipette shaft (H + I )
from the hand grip.
3.
Separate the magnetic connection between
both components by gently but firmly pulling in
opposite directions and remove upper part of
ejector (G).
4.
Unscrew piston unit (H) from lower part of the
pipette shaft ( I ).
5.
Remove the O-ring from the piston unit and
clean it.
Note:
6.
Clean piston unit (H) and lower part of pipette
shaft ( I ) with a mild soap solution or isopropa-
nol and then rinse with distilled water.
7.
Allow the parts to dry (max. 120 °C/248 °F)
and to cool down.
8.
Carefully lubricate O-ring inside and outside and
put it back in place.
9.
Assemble the cooled parts in reverse order from
above.
10.
Perform reference run (rEF).
Individual components shown can be ordered as spare parts.
Note:
For ordering information see page 65.
60
Do not disassemble piston unit
(H) any further!
Transferpette
®
®
electronic 500-5000 µl
J
G
H
I
J
G'