28.2 Bromine index determination (BRC)
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230
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917 Coulometer
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.
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 manual, in the "Technical specifications" chapter.
Input range
0.1 - 1250.0 mV
Default value 400.0 mV
Selection off
Max. rate
Rate at which bromine is generated outside the control range.
Input range 10.0 - 19876.0 µg/min
Default value 1000.0 µg/min
Selection maximum
Min. rate
Rate at which bromine is generated at the very beginning of the titration
and in the control range at the end of the titration. This parameter has a
vital influence on the titration rate and thus also on the accuracy. The
smaller the selected minimum rate, the slower the titration.
Input range 1.0 - 999.0 µg/min
Default value 25.0 µg/min
Table 10 Default values for the predefined titration rates for BRC
Titration rate
slow optimal fast
Dynamics 400.0 mV 400.0 mV 400.0 mV
Max. rate 500.0 µg/min 1000.0 µg/min 2000.0 µg/min
Min. rate 15.0 µg/min 25.0 µg/min 50.0 µg/min
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