Metrohm MVA-20 - Manual (Page 8)

Application Bulletin 402/1 e
Installation instruction for MVA-20
10. The new value can be seen in the section «Lift position
– Current position».
11. Select the option «Work position for Tower» in the
section Lift position.
12. Click on «Assign» in the section Lift position.
13. Leave the Manual control with a click on the «Close»
button.
4. viva «Method»
4.1. Method run
viva software includes three method templates for CVS
analysis with an automated system.
•
Brightener determination (CVS, MLAT), automated
•
Conditioning (Cu VMS), automated
•
Suppressor determination (CVS, DT), automated
The templates already establish the basic sequences for the
different applications, the use of 800 Dosinos for automatic
dosing as well as the calculation of the result and the
application of a sample changer and pumps to process a
sample series. However certain commands and settings
have to be adapted to the used hardware and the
requirements of the specific application.
For a step by step description please see the Tutorial
chapter «6.2 Methods for the automated determination».
The following commands have to be adapted:
4.1.1. Measuring commands
Such as
•
Assign the 894 Professional CVS instrument to be used
on the tab «General/Hardware».
•
Adapt the measuring parameters on the tabs «Pre-
treatment», «Sweep», «Post-treatment» and
«Potentiostat» according to the requirements of the
application. These parameters can be found in separate
application documentation.
4.1.2. Dosing commands
Such as:
•
Define the volume of solution that should be dosed
when this command is due.
Such as:
•
Define the volume of solution that should be dosed
when this command is due.
•
Assign the Dosing Unit that should be used to run this
command.
Such as:
•
On the tab «General/Hardware» assign the 894
Professional CVS instrument to which the 800 Dosino is
connected.
4.1.3. Automation commands
Such as:
•
Assign the 919 IC Autosampler plus that should be
used to run this command.
4.1.4. Transferring sample
This only applies for the brightener determination by MLAT!
To guarantee a complete transfer of the sample from the
sample vial on the rack of the 919 IC Autosampler plus into
the measuring vessel of the 894 Professional CVS the
peristaltic pump time has to be adjusted in the TRACK –
P ERISTALTIC PUMP in the command PUMP – P ERISTALTIC
PUMP ON.
Fig. 10: Method snippet TRACK – P ERISTALTIC PUMP
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