Metrohm 726 Titroprocessor - Manual (Page 138)

8.2 DET
726 Titroprocessor, Instructions for use 132 132
Dos. rate
Dosing rate of initial dosing
0.01 mL/min…150 mL/min | max.
The maximum dosing rate will depend on the size of the
buret cylinder used.
Buret cylinder max. rate
1 mL 3 mL/min
2 mL 6 mL/min
5 mL 15 mL/min
10 mL 30 mL/min
20 mL 60 mL/min
50 mL 150 mL/min
A value up to 150 mL/min can be entered even for small
buret cylinders. When the method is executed, however,
the dosing rate will be automatically reduced to the largest
possible value. Select 'max' whenever possible, except with
viscous reagent solutions.
Meas.val.
Measured value for discontinuing initial dosing
with DET_PH: pH -20 … 20 | off
with DET_U, DET_IPOL: -2000 … 2000 mV | off
with DET_UPOL: -200 … 200 µA | off
The threshold value of the measured signal, on attainment
of which initial dosing is discontinued. The controlled titra-
tion and data recording will then start after the pre-defined
pause (if programmed).
The direction and the progress of the change in measured
value have no incidence on the detection of this threshold
value. The measured value must be exceeded anyway.
Slope
Signal slope for discontinuing initial dosing
with DET_PH: 0.1 … 9.99 pH/mL | off
with DET_U, DET_IPOL: 0.5 … 999 mV/mL | off
with DET_UPOL: 0.1 … 99.9 µA/mL | off
The maximum value of the change in measured signal per
millilitre, on attainment of which initial dosing is discontin-
ued.
The controlled titration and data recording will then start
after the pre-defined pause (if programmed).
Pause
Pause before start of controlled titration
0 … 9999 s
A pause can be inserted before controlled titration starts. If
initial dosing is programmed, the pause will start on com-
pletion of this initial dosing.