Metrohm 877 Titrino plus - Manual (Page 82)

7.1 Monotonic equivalence point titrations (MET)
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877 Titrino plus
not defined
No check takes place.
I(pol)
The polarization current is the current that is applied at a polarizable elec-
trode during the voltametric measurement. This parameter is available
only with I(pol) determinations.
Input range –125 - 125 µA (Increment: 1)
Default value 5 µA
U(pol)
The polarization voltage is the voltage applied to the polarizable electrode
during an amperometric measurement. This parameter is available only
with U(pol) determinations.
Input range –1250 - 1250 mV (Increment: 10)
Default value 400 mV
Electrode test
For polarizable electrodes, an electrode test can be carried out. A check is
made that the electrode is properly connected and that no short-circuit is
present. The electrode test is carried out when the determination is
started. This parameter is available only with I(pol) and U(pol) determina-
tions.
Selection on | off
Default value off
Stirrer
When this parameter is switched on, then the stirrer is switched on at the
start of the determination.
Selection on | off
Default value on
Stirring rate
Setting the stirring rate. It can be set in steps of –15 to +15. The default
setting 8 corresponds to 1000 U/min. The formula for calculating the rota-
tional speed is specified in chapter 10.2, page 102. The optimum stirring
rate can be tested in the manual control.
The algebraic sign of the stirring rate changes the direction in which the
stirring is done. When the stirrer is viewed from above, this means:
￭ "+": counterclockwise rotation
￭ "–": clockwise rotation
Input range –15 - 15
Default value 8