Metrohm 774 Oven Sample Processor - Manual (Page 100)

5 Detailed Description
774 Oven Sample Processor, Instruction for use 94
The maximum dosing and filling rates that can be entered in the configura-
tion menu under '>dosing units' for every port of a dosing unit depend on
the burette size:
Volume of the
dosing unit
Max. dosing rate Resolution
2 mL 7 mL/min 0.2 µL
5 mL 17 mL/min 0.5 µL
10 mL 33 mL/min 1.0 µL
20 mL 67 mL/min 2.0 µL
50 mL 160 mL/min 5.0 µL
The following commands can be executed with Dosinos. The associated
inlets and outlets (ports) can be defined in the Parameter Menu under
'>dosing unit def.' as standard arrangement for a particular method or with
a DEF command in a process sequence or manual operation.
Dosing
DOS: XX : yyy.yy mL Dosing a certain volume.
The volume indicated is ejected at the dosing port. The burette is not refilled
after every operation. The dosing port can be redefined as desired:
>dosing unit def. XX
dosing port Y
or
<DEF> DRIVE.PORT XX.Y : dos.
Filling
DOS: XX : fill mL Filling the Dosino burette.
The burette is completely filled. It is aspirated via the filling port. This can be
redefined as desired:
>dosing unit def. XX
filling port Y
or
<DEF> DRIVE.PORT XX.Y : fill
Preparation
DOS: XX : prepar. mL Preparation = Filling the dosing and filling
tubes.
The tubing system of the Dosinos should be freed of air bubbles daily by
running a preparation cycle. During preparation, the burette as well as the
filling and dosing tubing are completely filled. Several filling and dosing
processes are executed for this. The volumes required for this are internally