Metrohm 840 PC Control 6.0 / Touch Control - Manual (Page 24)

2.2 Bromine index determination (BRC) ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
18 ￭￭￭￭￭￭￭￭
2.2 Bromine index determination (BRC)
2.2.1 Control parameters
Under [Control parameters], the control parameters for the endpoint
are defined.
Endpoint at
Measured value for the endpoint.
Range –1250.0 ... 1250.0 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.
The settings of the individual titration rates are listed in table 2, page
19.
User-defined parameters
These parameters are only accessible when Titration rate = User.
Dynamics
This parameter defines the control range before the specified endpoint.
Within the control range, the bromine is generated step by step, the gen-
eration is finely controlled. The closer the endpoint, the slower the bro-
mine is generated until the rate defined under Min. rate is reached. The
larger the control range, the slower the titration. Outside the control
range, bromine is continuously generated, the rate is defined under Max.
rate.
Range 0.1 ... 1250.0 mV
Default value 400.0 mV
Selection off