2.8 Dosing and liquid handling
60 Metrohm 838 Advanced Sample Processor, Operation
2.8.3 The DOS command
The liquid handling command DOS has two parameters:
General:
DOS: Address Function
Example:
DOS: 1.1 5 mL
Parameter: drive.port Volume or function
(negative volume permitted)
for drive: * = all dosing drives
for port: * = default port for particular function
Example:
DOS: *.* fill mL
means: On all the connected dosing devices the cylinder is filled via the default
port.
Default ports: The default ports are the ports assigned in the parameter menu under
>Dosing unit def., see also Section 2.2.4.
2.8.4 Pictograms
For complex liquid handling tasks only Dosinos (700 or 800 models)
can be used as dosing drive. In order to clarify the various functions
and processes the following pictograms are used on the next few
pages.
The following arrangement applies:
Function
The arrow represents the direction of motion of
the piston in the dosing cylinder.
The stopcock position is shown beneath the cyl-
inder wherever necessary.
Port
11
22
33
44
Default:
Dosing port 1
Default:
Filling port
Default:
Dosing port 2
Default:
Drain port
The pictograms above show the default settings..
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