Metrohm 796 Titroprocessor - Manual (Page 158)

8.4 SET
796 Titroprocessor, Instructions for use 152 152
Derivation
Recording the 1st derivative of the titration curve
on | off
If the derivative of the titration curve is to be shown then
derivation recording must be switched on.
U(pol)
Polarization voltage (only with SET_UPOL*)
-1270…400…1270 mV
The polarization voltage is the voltage which is applied to a
polarized electrode during amperometric titration. The re-
sultant measuring quantity is µA.
I(pol)
Polarization current (only with SET_IPOL*)
-127…1…127 µA
The polarization current is the current which is applied to a
polarized electrode during voltametric titration. The resul-
tant measuring quantity is mV.
Stop conditions
The stop conditions correspond to those of the KFT mode, see page 163f.
8.4.2 Custom Adjustments
Custom adjustments allow the control parameters of the titration to be finely
tuned. Starting with a set of parameters (fine, medium, coarse) after press-
ing the softkey [User defin.] under 'Adjustments' on the parameter
page the individual parameters can be altered in the dialog window 'Custom
adjustments'.
ЪДДД Custom adjustments ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД¿
³ ³
³ Dynamics pH 2.00 ³
³ Min. rate 25.00 æL/min Stop crit. drift ³
³ Max. rate 10.00 mL/min Stop drift 20 æL/min ³
³ ³
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД QUIT ÄÙ
Dynamics
Measurement range for controlled titration
for SET_PH: 0.1…2…20 | off
for SET_U, SET_IPOL: 1…100.0…2000 mV | off
for SET_UPOL: 0.1…10.0…200.0 µA | off
The control range defines the measurement range in
which controlled titration is carried out before the given
endpoint. Outside this range addition is made at the
maximum dosing rate. For steep curves a sufficiently
large control range should be selected; for flatter curves
this can be smaller. If the control range is switched off