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29.2 Monotonic equivalence point titrations (MET)
Titrant
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Selection of the titrant from the titrant list. We recommend always selecting the titrant. This ensures that the correct data (titer, concentration, etc.) is always used for the calculation. Titrants are defined under System ▶ 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
Default value
Selection of configured titrants | not defined 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
Default value
1
1
| 2 | 3 | 4 | off 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.
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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
Default value
–15 to 15
8
310 ￭￭￭￭￭￭￭￭ 900 Touch Control
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Key Features
- Dynamic equivalence point titration (DET)
- Monotonic equivalence point titration (MET)
- Endpoint titration (SET)
- Water determination according to Karl Fischer (KFT)
- Titration with constant maintenance of the measured value (STAT)
- Manual titration (MAT)
- Coulometric water content determination according to Karl Fischer (KFC)
- Bromine index determination (BRC)
- Intuitive touch-sensitive screen for easy operation
- Comprehensive user administration for secure data management