BrandTech Scientific Titrette - Manual (Page 57)

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2
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g
c'
c
English
57
Cleaning Dismantling instrument · Component replacement
b) Use a soft cloth to clean the dispensing cylinder and
piston, or replace them.
c) To replace the piston, first slide the light grey safety
ring of the piston rod upwards (Fig. c), and then un-
screw the piston head (Fig. c’).
d) Screw a new piston onto the piston rod, and tighten it
securely.
e) Line up the piston gears and those of the piston rod,
turning the piston back a maximum of half a gear tooth
to accomplish this.
f) Slide the safety ring of the piston rod downwards.
g) Orient the toothed rack (1) of the piston rod in the
direction of the air vent opening (2) of the valve block.
This is found opposite the titrating tube connection (3).
Carefully insert the piston vertically into the cleaned or
replaced dispensing cylinder and press it about half-way
in (Fig. g).
The sealing lip of the piston must not be dam-
aged. Contact with hard objects should be
avoided!
Note:
serial-number
Structural change from serial-number 01K
The assembly of the titrating tube to the valve block has been
changed. When ordering spare parts, the serial number must be
accounted for.
serial-
number
NEW
Dispensing cylinder
with valve block appropriate titrating tube
Volume Cat. No. Cat. No.
up to serial-number 12J (December 2011) inclusive
25 ml 7075 34
7075 26
50 ml 7075 36
from serial-number 01K (January 2012) onward
25 ml 7075 35
7075 29
50 ml 7075 37