Metrohm 900 Touch Control Manual - Manual (Page 327)

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29 Parameters
900 Touch Control
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Measuring mode pH:
Input range
–20.000 - 20.000
Selection off
Default value off
Measuring mode U and Ipol:
Input range
–2,000.0 - 2,000.0 mV
Selection off
Default value off
Measuring mode Upol:
Input range
–200.00 - 200.00 µA
Selection off
Default value 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 steep titration curves for which dosing must be carried out in small
steps at the endpoint.
optimal
For all standard titrations. The parameters have been optimized for the
most frequent applications.
fast
For flat titration curves for which the endpoint is reached only slowly.
user
The individual titration parameters can be modified.
The settings of the individual titration rates are listed in table 8, page
313.
User-defined parameters
These parameters are only accessible when Titration rate = user.
Dynamics
This parameter defines the control range before the specified endpoint.
Individual volume steps are dosed in the control range, the dosing is finely
controlled. The closer the endpoint, the slower the dosing until the dosing
rate defined under Min. rate has been reached. The larger the control
range, the slower the titration. Outside the control range, dosing is carried
out continuously, and the dosing rate is defined under Max. rate.