Servicing And Cleaning - BRAND Transferpette -8 Operating Manual

The three main components of the manifold can be eas-
ily separated and disassembled for servicing, cleaning
or replacing parts. The procedures are illustrated on the
following pages.
Note: The changing of the V-rings/O-rings on the
individual nose cones is described in detail in
the instructions enclosed with the spare part.
The main components of the manifold
A
Piston unit with piston support bar [ I ] and pistons
inserted in this unit, which can be unscrewed indi-
vidually for cleaning or replacement.
B
Nose cone assembly with nose cone support bar
[II] and central guide rod ( Z ), which is attached to
this, and the nose cones and seals, which can be
unscrewed individually for cleaning or replacement.
C
Manifold housing, which is connected to the mani-
fold housing cover [ III ] of the piston unit with two
turn-lock fasteners.
Servicing
In order to assure proper functioning, the Transferpette
-8/-12 electronic should be serviced and cleaned at
regular intervals.
What is to be inspected?
1.
Inspect nose cones, pistons and seals for damage
and contamination.
2.
Test the sealing of the instrument. We recommend
using the BRAND leak testing instrument PLT unit.
Alternatively: 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 orifices, see the
troubleshooting guide on page 70.
Cleaning instructions (page 64-67)
1.
Clean single nose cones, pistons and nose cone
support bar/piston support bar (these components
only) with soap solution or isopropyl alcohol. After-
wards rince with distilled water.
2.
Let these parts dry and cool down completely. Re-
sidual moisture in the nose cones may result in a loss
of accuracy.
3.
Lubricate the piston with a very thin coating of the
silicone grease supplied. For the central guide rod (Z)
only use the recommended fluorstatic grease!
4.
After assembling the device, performe the reference
run (rEF).

Servicing and Cleaning

P
®
A
B
C
III
I
z
II
63