Metrohm 848 Titrino plus - Manual (Page 111)

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7 Parameters
848 Titrino plus
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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 star-
ted. This parameter is available only with I(pol) and U(pol) determinations.
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 118. 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
Temperature
Manually entered titration temperature. If a temperature sensor is connec-
ted then the temperature will be measured continuously. This value is
used for temperature correction in pH measurements.
Input range –20.0 - 150.0 °C
Default value 25.0 °C
Titration direction
The titration direction is normally determined automatically from the start
measured value and the set endpoint. It is recommended that, whenever
possible, a positive or negative alteration of the measured value is
entered. If two endpoints have been set then the titration direction will be
defined automatically. In this case the setting will be ignored.
Selection + | – | auto
Default value auto