Metrohm tiamo 2.1 (ProcessLab) - Manual (Page 832)

5.6 Commands ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
816 ￭￭￭￭￭￭￭￭ tiamo 2.1 (ProcessLab)
Min. rate
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. The smaller the selected
minimum rate, the longer it takes until the control point is reached for the
first time. The following rule of thumb should be observed for maintaining
the Min. rate in order to achieve as constant (regular) a dosing at the control
point as possible: Min. rate in µL/min = expected reaction rate in µL/min/
10.
Range 0.01 ... 9999.00 µL/min
Default value 10.00 (50 µL/min), 20.00 (100 µL/min), 40.00
(500 µL/min) µL/min
Note
Outside the control range, the dosing rate is determined mainly by the
Max. rate. The parameters Max. rate and Dynamics pH should be
optimized together in such a way that the titration does not overshoot
too much when the control point is reached. The control range should
be selected in such a way that the measured value remains within this
range when dosing stops. A slightly larger control range should be defined
for slow reactions (e. g. pH = 3). The nominal value is often set with a SET
pretitration before the substrate is added. This means that the STAT titra-
tion can be started with a small deviation from the control point. Within
the control range, the dosing rate is determined primarily by the Min.
rate.
5.6.3.8.6.5 STAT pH - Titration parameters
Tab: Method ▶ STAT pH ▶ Properties... ▶ Titration parameters
Command name
Name of the command.
Input 25 characters
Parameters defining the run of the titration.
Titration direction
Selection of the titration direction. If two endpoints are set, then the titration
direction is already established and the following selection of titration
direction is ignored.
Selection + | - | auto
Default value auto
+
positive measured value alteration