Metrohm 726 Titroprocessor - Manual (Page 164)

8.6 KFT
726 Titroprocessor, Instructions for use 158 158
8.6 KFT
Two different KFT modes are available for titrimetric water determination
with Karl Fischer reagents; they differ only in the measuring method:
KFT_UPOL* measured quantity µA (selectable pol.voltage in mV)
KFT_IPOL* measured quantity mV (selectable pol.current in µA)
The following information applies to both KFT modes. Any variations are
noted.
KFT_IPOL* Karl Fischer titration
Reagent Sensor
Concentr. Meas. input Apol
Dos. drive A1
applies to ⇒ KFT_IPOL*, KFT_UPOL*
KFT modes produce the same system variables as DET modes, see page
128. In addition the following variables are provided for calculating a drift
volume reduction (see page 154):
DOD Dosing duration during the titration, cumulative
ITD Time duration between conditioning and titration
Assignment parameters for KFT modes:
The assignment parameters (Comment, Reagent, etc.) for the KFT modes
are the same as those for the DET modes, see page 129f.
8.6.1 Specific parameters for KFT modes [ * Param ]
The specific parameters for the respective KFT KFT modes can be found under
the softkey [* Param ].
ЪДДД KFT_IPOL* Parameters ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД¿
³ ³
³ Start conditions ³
³ Volume off Pause 1 0 s ³
³ Pause 2 0 s ³
³ Extract.time 0 s ³
³ ³
³ Titration conditions ³
³ Direction neg. Temperature 25.0 øC ³
³ End-point 250 mV Time recording on ³
³ Adjustment medium Derivation off ³
³ Meas.interval off s ³
³ I(pol) 50 µA ³
³ Stop conditions ³
³ Volume absolute Stop time off s ³
³ Size 99.99 mL Mpt. overflow off ³
³ Fill. rate max mL/min ³
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД QUIT ДЩ