29.5 Coulometric Karl Fischer titrations (KFC)
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900 Touch Control
￭ Polarizable electrodes
– Is the electrode connected?
– Is there a short circuit?
The electrode check is carried out when this command is started.
￭ Generator electrode:
– Is the electrode connected?
– Is the generator system defective?
– Is the resistance of the sample solution very high?
The electrode check is carried out continuously during the execution of
this command.
Temp. measurement
Type of temperature measurement.
Selection continuous | automatic | off
Default value automatic
continuous
A temperature sensor must be connected. The temperature is mea-
sured continuously.
automatic
If a temperature sensor is connected then the temperature will be mea-
sured continuously. Otherwise, the temperature entered manually will
be used (see dialog of the titration and measuring parameters).
off
The temperature will not be measured. The temperature entered man-
ually is used (see dialog of the titration and measuring parameters).
29.5.8 Stirrer
The parameters for the stirrer are edited under [Stirrer].
Stirrer
Selection of the MSB connector the stirrer is connected to. Every MSB
connector will always be displayed.
Selection 1 | 2 | 3 | 4 | off
Default value 1
off
No stirrer will be used.
Stirring rate
Setting the stirring rate. It can be set in steps of –15 to +15. The default
setting 8 corresponds to 1000 rpm. The formula for calculating the rota-
tional speed is specified in chapter 32.4, page 494. The optimum stirring
rate can be tested in the manual control.
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