Metrohm 877 Titrino plus - Manual (Page 98)

7.2 Endpoint titrations (SET)
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88 ￭￭￭￭￭￭￭￭
877 Titrino plus
Measuring mode Upol:
Input range
0.01 - 125.00 µA
Default value 10.00 µA
Selection off
Max. rate
This parameter is visible only when Titration rate = user.
Rate at which dosing is carried out outside of the control range. The maxi-
mum dosing rate depends on the cylinder volume (see Chapter 10.1.1,
page 101).
Input range 0.01 - 166.00 mL/min
Default value 10.00 mL/min
Selection max.
Min. rate
This parameter is visible only when Titration rate = user.
Rate at which dosing is carried out at the very beginning of the titration
and in the control range at the end of the titration. This parameter has a
decisive influence on the titration rate and thus also on the accuracy. The
smaller the selected minimum rate, the slower the titration.
Input range 0.01 - 9999.00 µL/min
Default value 25.00 µL/min
Table 2 Standard values for predefined titration rates for SET
Titration rate
slow optimal fast
Dynamics
– pH
– U und Ipol
– Upol
5.000
300.0 mV
40.00 µA
2.000
100.0 mV
10.00 µA
0.500
30.0 mV
5.00 µA
Max. rate 1.00 mL/min 10.00 mL/min maximum
Min. rate 5.00 µL/min 25.00 µL/min 50.00 µL/min
Stop criterion
The titration is stopped when the endpoint has been reached and this
stop criterion has been fulfilled. If no stop criterion has been selected then
the titration will not be stopped. The stop conditions (see Chapter 7.2.6,
page 89) always lead to a stop, even if the stop criterion has not been
reached.