28.7 Dosing and Liquid Handling
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268
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917 Coulometer
Dosing device
Selection of the MSB connector to which the dosing device is connected.
The selection does not depend on the number of MSB connectors of the
control instrument.
Selection 1 | 2 | 3 | 4
Default value 1
Titrant
Selection of the titrant from the titrant list. We recommend always select-
ing the titrant. This ensures that the parameters defined for the titrant for
the preparing as well as the tubing parameters (dosing unit only) are used.
Titrants are defined under System â–¶ 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 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. The command is carried out with default param-
eters (see Chapter 31.1.2, page 294 and Chapter 31.2.2, page 295).
Air inlet
This parameter can only be edited with Titrant = not defined.
Selection of the port via which air is aspirated. This setting is only relevant
for dosing units, in case of preparing an exchange unit, this setting is
ignored.
Selection Port 1 | Port 2 | Port 3 | Port 4
Default value Port 4
28.7.3 Dosing a specified volume (ADD)
You can dose a specified volume with the command ADD.
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