101
3.6.3
Manual Titration
Manual titration is always performed using the “mouse“. Manual titration is impossible without the
“mouse“. The mV or pH reading will be displayed. The value can be selected in the “Titration
parameter“ menu item. In the present case this is the pH value.
Fig. 40
Using
<START>/<F1>
or pressing the black key on the “mouse“ will start the manual titration method.
Following the input of the sample description and/or the weight/volume (optional - please compare
also the explanations are regarding automatic titration in
Chapter 3.6.1
), the following display will
appear:
Fig. 41
You can control the metering rate with the black key of the “mouse“. A single depression of the key will
cause a step up to the first level. Depending on the size of the dosing unit it is 0.0025 ml (20 ml dosing
unit) or 0.00625 ml (50 ml dosing unit). However, only three decimal places will be shown. Therefore
you will only see the dosing volume in the display starting with the 4th (20 ml dosing attachment) or
the 2nd titration step (50 ml dosing attachment).
If one keeps the black key depressed on the first level, titration will be continued at a low rate. If you
press the black key fully down (2
nd
level) titration will proceed at a higher rate. The rate of the second
level can be set in five stages using the <
↓↑> arrow keys. These stages can also be changed during
manual titration.
