Metrohm 900 Touch Control Manual - Manual (Page 359)

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29 Parameters
900 Touch Control
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The algebraic sign of the stirring rate changes the direction in which the
stirring is done. When the stirrer is viewed from above, this means:
￭ "+": counterclockwise rotation
￭ "–": clockwise rotation
Input range –15 - 15
Default value 8
Switch off automatically
on | off (Default value: on)
If this parameter is activated, the stirrer will be switched off automatically
at the end of the titration, measurement, etc.
29.6 Bromine index determination (BRC)
29.6.1 Control parameters
The control parameters for the endpoint are defined under [Control
parameters].
Endpoint at
Measured value for the endpoint.
The values that are actually measurable may vary from the values specified
here, depending on the hardware. The binding measurement value ranges
can be found in the "Technical specifications" chapter for the control
device used.
Input range –1,250.0 - 1,250.0 mV
Default value 200.0 mV
Selection off
Titration rate
Three predefined sets of parameters can be selected for the titration rate.
Selection slow | optimal | fast | user
Default value optimal
slow
For samples with slow bromine addition.
optimal
For all standard titrations. The parameters have been optimized for the
most frequent applications.
fast
For uncritical samples with fast bromine addition.
user
The individual titration parameters can be modified.