Metrohm 796 Titroprocessor - Manual (Page 138)

8.2 DET
796 Titroprocessor, Instructions for use 132 132
The various conditions governing the discontinuation of initial dosing can be
combined at will.
N.B.: Initial dosing is discontinued on attainment of any of the start condi-
tions, be it the defined absolute/relative start volume, the defined measured
value or the signal slope. The actual titration will then start immediately after
the pre-set pause.
predef. start volume
meas. value (reached)
Slope
Vol [mL]
U [mV]
actual initial dosing
The volume actually dosed is filed in the SV system variable and can be
called up for calculations.
Volume
Definition of the start volume
absolute | relative | off
The defined start volume can be entered as an absolute
volume, or as a relative volume as a function of the sample
size (recommended). Various other fields* will need to be
edited depending on what is entered in this field
(see be-
low).
Size
* Absolute volume (with abs. start volume)
0…999.99 mL
If an absolute start volume is entered, the start volume
should be kept small enough to ensure that sufficient vol-
ume remains up to the equivalence point for the dynami-
cally controlled titration.
Factor
* Calculation factor (with rel. start volume)
–99999…0…99999
The actual volume of the start volume to be added will be
calculated as follows:
Volume in mL = sample size
∗∗ factor .
The maximum start volume that can be added is 1000 mL.
If the calculation results in a higher value, the start volume
is automatically reduced to 1000 mL.