Fitting And Replacing An Interchangeable Unit - SCHOTT TITRONIC 110 plus Manual De Instrucciones

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2.4

Fitting and replacing an interchangeable unit

An interchangeable unit is installed by simply slipping it on over the guide rail from front to back. The in-
stallation is completed when you can clearly here the mechanical retention device snap in.
If you should encounter any problems during installation, the position of the PTFE piston inside the glass
cylinder is to be adjusted. To adjust this piston, please use the piston drawer provided to pull it downwards
until the top edge of the PTFE piston is approx. 8 mm below the upper edge of the black pressure screw.
The actual adjustment can now be done by simply pressing the interchangeable unit onto a flat surface,
for example a table top.
To replace an interchangeable unit, the piston in the cylinder has to be set to the lower starting position.
To do so, please trigger the filling operation (also refer to chapter 4.7, "Initial filling and rinsing of the
®
TITRONIC 110 plus Piston Burette"). Subsequently, the interchangeable unit can be easily removed to-
wards the front by pressing the retention key on the left side of the unit (Fig. 4).
After removing the interchangeable unit, the signal tone will sound, and the display will show <<hd-->>. Af-
ter installing an interchangeable unit the burette size will be recognised and displayed automatically, e.g.
<<hd 10>> in the case of a 10 ml interchangeable unit.
When working with a square glass bottle, please use the clamping ring provided to prevent the reagents
bottle from falling out of the holder.
Fig. 4
Set-up and first operation
Caution: After each replacement, an automatic
filling incl. float balancing will take place. For
this reason, please DO NOT remove the inter-
changeable unit immediately, but only as soon
as the display shows 0.0 (cp. Fig. 3).
If a new interchangeable unit is installed with-
out reagent, you have to initiate an "Initial fill-
ing" or "Rinsing" of the piston burette (please
refer to chapter 2.6).
The front section of the interchangeable units
contain a coding which communicates the size
of the installed cylinder to the bottom section of
the burette. This ensures accuracy of the
dosed volume at any time.