Metrohm 900 - Dosing and Liquid Handling; Preparing an Exchange or Dosing Unit (PREP)

29.15 Dosing and Liquid Handling
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900 Touch Control
29.15 Dosing and Liquid Handling
The following dosing commands are available:
Preparing the
exchange unit or
dosing unit (PREP)
Rinsing the cylinder and the tubings of the
exchange unit / dosing unit.
Emptying the dos-
ing unit (EMPTY)
Emptying the cylinder and the tubings of the
dosing unit.
Dosing a fixed vol-
ume (ADD)
Dosing a specified volume.
Liquid Handling
(LQH)
Carrying out complex dosing tasks with a Dos-
ino.
Monitored dosing
(DOS)
Dosing with simultaneous monitoring of mea-
sured value and temperature.
29.15.1 Preparing an exchange or dosing unit (PREP)
The PREP command is used to rinse and fill air bubble-free the cylinder
and tubings of the exchange or dosing unit. You should carry out this
function before the first determination or once a day.
Control device
This parameter is only displayed when several control devices are config-
ured. Control devices are defined under System ▶ Device manager.
Selection of the control device from the list of devices. The control devices
do not have to be connected. This allows to transfer methods more easily
from one system to another.
Selection Selection of configured control devices
Dosing device
Selection of the MSB connector to which the dosing device is connected.
Every MSB connector will always be displayed.
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 ▶ 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.