Metrohm 726 Titroprocessor - Manual (Page 134)

8.2 DET
726 Titroprocessor, Instructions for use 128 128
8.2 DET
There is a choice of four different DET modes for controlled titrations with
dynamic volume steps. They differ only in respect of the measurable vari-
able:
DET_PH* Measuring quantity pH
DET_U* Measuring quantity mV
DET_UPOL* Measuring quantity µA (adjustable pol. voltage in mV)
DET_IPOL* Measuring quantity mV (adjustable pol. current in µA)
The following information applies to all DET modes. Discrepancies are indi-
cated.
DET_PH* dynamic equivalence point titration
Reagent Sensor
Concentr. Meas. input A1
Dos. drive A1
applies to ⇒
DET_PH*
, DET_U*, DET_UPOL*, DET_IPOL*
DET modes create the following system variables:
R$$ end result / live result
X$$ intermediate resultat / live result (not to be printed out)
C$$ common variable (automatic assignment)
EP# reagent volume at equivalence point #
F# reagent volume at fixed endpoint #
EM# measured value of equivalence point #
FM# measured value of fixed endpoint #
EF# flag (1/0) for equivalence point found #
FF# flag (1/0) for fixed endpoint found #
HNP# half neutralization potential HNP / pK value
HNV# reagent volume at HNP in mL
SV start volume in mL; consumption of initial dosing
CV end volume in mL; total reagent volume added
C concentration of reagent (as defined in method)
IM initial measured value at start of mode; depends on meas.
quantity
SM initial value at start of measuring, after initial dosing
CM end value of measuring or titration, depends on meas. quantity
IT initial temperature at start of mode in °C
ST start temperature at start of measuring, after initial dosing
CT end temperature at titration end in °C
MD duration of titration or measuring mode in s
SD start duration in s (for initial procedures)
$LV live volume in mL; current reagent volume added
$LM live measuring value; current value (depends on meas. quan-
tity)