BRAND Transferpette electronic Operating Manual page 62

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 damage.
Test the sealing of the instrument. We recommend using
the BRAND leak testing instrument PLT unit. Alterna-
tively: 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 65.
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 isopropanol
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).
Note: Individual components shown can be ordered as spare parts.
For ordering information see page 67.
62
Do not disassemble piston unit
(H) any further!
Transferpette
®
electronic 500-5000 µl
®
J
G
H
I
J
G'