104
3.6.3
Manual Titration
Manual titration is impossible without the manual controller.
The mV or pH reading will be displayed (Fig. 41). The value can be selected in the menu item «
Titration
parameter
».
Fig. 41
<
START
> or pressing the black key on the manual controller will start the manual titration method.
Following the input of the sample description and/or the weight/volume (optional - please compare also the
explanations in
Automatic Titration) the display changes (Fig. 42).
Fig. 42
You can control the metering rate with the black key of the manual controller (Fig. 42).
a) A single depression of the key will cause a step up to the first level. Depending on the size of the
interchangeable unit, this corresponds to 0.005 ml (20 ml) or 0.025 ml (50 ml).
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).
b) If one keeps the black key depressed on the first level, titration will be continued at a low rate.
c) 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.
