Accessories - BRAND Dispensette III Operating Manual

Accessories

The following optional accessories are available for the bottle-top
dispenser Dispensette
SafetyPrime ™ recirculation valve
The SafetyPrime
ables priming of the instrument without loss of medium. Always use
the designated recirculation valve that corresponds to the instrument
model. For assembly, see "Assembly" on page 10 (Fig. 2).
Flexible discharge tube
For serial dispensing the flexible discharge tube can be used (Acces-
sories page 55). The specified accuracy and coefficient of variation
of the instrument are only obtained for volumes > 2 ml and by gently
approaching the upper and lower stops.
The coil of the tubing can be stretched to a length of the 800 mm
max..The entire coil must lie in regular loops and must not be twisted.
The parts in contact with the media are made of:
Borosilicate glass, AI
Never use for:
- liquids attacking borosilicate glass (e.g.,
hydrofluoric acid)
- Peroxides, as they are decomposed catalytically
by platinum-iridium (e.g., H
Additionally the Operating Exclusions of the instrument apply.
For mounting, attach the tube holder onto the valve block (Fig.
a) and mount the receiver tube. Slide the dispensing tube with the
flexible discharge tube approx. 2 mm further on the valve block, and
tighten the lock nut hand-tight. Use a bottle stand (Fig. b) (see ac-
cessories, page 56).
Warning:
There should be no visible damage to the discharge tube (e.g. kinks or the like). Each time you are going
to use the tubing, examine it carefully! To dispense aggressive liquids, you should take safety measures
in addition to the normal precautions. We recommend use of a protective shield. The bottle must be sup-
ported using a bottle stand. To help avoid reagent splashing from the tube, always grip the tube firmly by
the handle and replace into the holder after use. For cleaning rinse the tube carefully. Do not dismantle!
42
:
®
™ recirculation valve (see accessories, page 55) en-
O -ceramic, ETFE, PTFE, platinum-iridium.
2 3
O ).
2 2
a
b