29.2 Monotonic equivalence point titrations (MET)
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
310
￭￭￭￭￭￭￭￭
900 Touch Control
Titrant
Selection of the titrant from the titrant list. We recommend always select-
ing the titrant. This ensures that the correct data (titer, concentration, etc.)
is always used for the calculation. Titrants are defined under Sys-
tem ▶ Titrants. You can also enter a name which is not contained in the
titrant list. When a determination is started there is a check whether the
solution is contained in the list.
For buret units with integrated data chip, a check is made in the method
run to verify whether the correct titrant has been attached and whether
the type of dosing drive matches. For buret units without an integrated
data chip, the cylinder volume and the type of dosing drive are checked.
For the selected titrant, the validity of the titer, the working life of the
titrant and the time interval for the GLP test of the buret unit are checked
at the start of the determination.
Selection
Selection of configured titrants | not defined
Default value not defined
not defined
No check takes place.
29.2.8 Stirrer
The parameters for the stirrer are edited under [Stirrer].
Stirrer
Selection of the MSB connector the stirrer is connected to. Every MSB
connector will always be displayed.
Selection 1 | 2 | 3 | 4 | off
Default value 1
off
No stirrer will be used.
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 32.4, page 494. 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 to 15
Default value 8
To Next Page
Loading...
