Metrohm 900 Touch Control Manual - Manual (Page 368)

29.7 STAT titrations (STAT)
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900 Touch Control
Stirring rate
Setting the stirring rate. It can be set in steps of –15 to +15. The default
setting 8 corresponds to 1000 rpm. The formula for calculating the rota-
tional speed is specified in chapter 32.3, page 489. 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
Switch off automatically
on | off (Default value: on)
If this parameter is activated, the stirrer will be switched off automatically
at the end of the titration, measurement, etc.
29.7 STAT titrations (STAT)
29.7.1 Start conditions
The parameters that are carried out before the start of titration are
defined under [Start conditions].
Pause 1
Waiting time, e.g. for the electrode to settle down before a start volume is
added.
Input range 0 - 999999 s
Default value 0 s
Start volume
Volume that is dosed prior to the start of the titration.
Input range 0.00000 - 9999.99 mL
Default value 0.00000 mL
Dosing rate
Rate at which the start volume is dosed.
Input range 0.01 - 166.00 mL/min
Selection maximum
Default value maximum