37
4.7 Titration
Note:
Please switch on stirrer!
Press the <MODE> key so many times until the
TITRONIC
â
â
â
â
universal
Piston Burette shows the
image with the “Titration” = <Mode>:Titr. Function.
Fig. 21
Fig. 18
<Mode>:Titr.
8.37
ml
Speed level: 3
<
↑↓
>
Pretitr.:
6.00ml<F5>
Titrate:
button man.
Pretitration
<Start>
Normal titration
Immerse the burette tip into the sample solution.
This will increase accuracy.
Press the violet key down to the first stage (low
speed), and keep it depressed. The titration solu-
tion will be added as long as the key is kept de-
pressed,
&
Fig. 19.
The display will show the volume, the titration rate
is approximately 3 ml per minute.
0.01 ml - titration / incremental titration
Press the violet key shortly (0.3 s max.). 0.01 ml will
be ejected with each pressing,
&
Fig. 20.
The display will show the volume.
Fast titration
As long as the burette is in standstill, use the <
↑
>,
<
↓
> arrow keys to select one of the 6 possible rate
stages. The fastest stage is <<6>>.
Press the violet key fully down (including 2
nd
stage
= high speed), and keep it depressed.
The titration solution will be dosed as long as the
key is kept depressed.
The display will show the volume and the selected
rate stage, with the fastest stage 6 representing a
titration rate of approx. 40 ml or 100 ml per minute,
respectively,
&
table in „Setting the parameters“
chapter.
Pretitration
If you are aware of the minimum consumption of titration solution, you can set a pretitration volume from
0 to 99.99 ml for more convenient titration, please ref. to
&
„Setting the parameters“ chapter.
Using the <START> key the burette will eject the set pretitration volume at maximum rate. You can at any
time cancel the addition of the pretitration volume using the <STOP> key and then complete either titration
with the manual key button or pretitration using the <START> key.
As soon as the pretitration volume is reached, an acoustic signal will be output. You can now use the
manual key button to complete titration.
The display will show the total volume of used up titration solution.
During titration, you can also output the total volume in [ml] at the RS-232-C interface for documentation
purposes.
Fig. 19
Fig. 20