Metrohm 900 Touch Control Manual User Manual Page 358

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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
measured 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 32.3, page 489. The optimum stirring
rate can be tested in the manual control.
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