BrandTech Scientific seripettor - Manual (Page 37)

a
d
c
English
For serial dispensing the optional flexible discharge tube can be used (see 'Accessories' page 46).
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
2
O
3
ceramic, ETFE, PTFE,
platinum-iridium, PP.
Therefore, never use the flexible discharge tube for:
– liquids attacking
borosilicate glass (e.g., hydrofluoric acid)
– Peroxides, as they are decomposed catalytically by platinum-iridium (e.g., H
2
O
2
)
Additionally the operating exclusions of the instrument apply.
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 mea-
sures in addition to the normal precautions. We recommend use of a
protective shield. The bottle must be supported 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 clean-
ing rinse the tube carefully. Do not dismantle!
Dispensing with flexible discharge tube
a) Attach the tube holder onto the valve
block and mount the receiver tube
(fig. a).
b) Prior to mounting the flexible dis-
charge tube, remove the installed
sealing ring and replace it with the
accompanying sealing ring.
c) Check whether the gasket is properly
seated in the adapter (fig. c)!
d) Slide the discharge tube onto the
adapter and firmly finger-tighten the
locking nut. Then, slide the adapter
onto the valve block and firmly finger-
tighten the locking nut.
Use a bottle stand (fig. d).
Mounting the flexible
discharge tube
37