Metrohm 797 VA Computrace - Manual (Page 223)

8.5 Determinations with voltammetric trace analysis
797 VA Computrace – Software
211
6. If Dosing Devices should be used for addition or predose, click
and set the parameters to the desired values (see
Dosing Devices, section 5.2).
7. If necessary, click and limit the Highest current
range or Lowest current range in the POTENTIOSTAT window
(see Potentiostat, section 3.3).
8. Click and set the parameters on the tabs Deter-
mination , Voltammetric , Substances , Calculations , Documenta-
tion und Export (see section 5.2) in the EDIT WORKING
METHOD PARAMETERS window.
9. Close the EDIT WORKING METHOD PARAMETERS window by
clicking .
Modify methods for automatic background compensation
1. Click on or MAIN WINDOW / Mode / Determination .
2. Click on or MAIN WINDOW / Window / Working method
specification to open the WORKING METHOD SPECIFICATIONS
window.
3. Click on or MAIN WINDOW / File / Load method .
4. Select the desired method file *.mth in the OPEN window and
click . The method is loaded into the WORKING METHOD
SPECIFICATIONS window.
5. Click the button in the WORKING METHOD SPE-
CIFICATIONS window and select the Determination tab.
6. Enable the Measure blank option, enter the number of measu-
rements No. of blanks and the Blank purge time .
7. Close the EDIT WORKING METHOD PARAMETERS window by
clicking .
If you start a determination with this modified method, you are first
asked to place the specified number of blank solutions into the
measuring vessel. The resulting blank curve is then automatically
subtracted from all subsequent measured curves.
8.5 Determinations with voltammetric trace analysis
Load a determination
1. Click on or MAIN WINDOW / Mode / Determination .
2. Click on or MAIN WINDOW / File / Load determination .