Metrohm 757 VA Computrace - Manual (Page 168)

7 How to ...?
757 VA Computrace – Software
158
Perform a peak test with the dummy cell
For testing the peak measurement, the dummy cell of the 757 VA
Computrace Stand is used with the test method
Test757_D.mth .
Proceed as follows:
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 method file Test757_D.mth in the OPEN window and
click <OK> . The method is loaded into the WORKING METHOD
SPECIFICATIONS window.
5. Connect the dummy cell at the 757 VA Computrace Stand: At-
tach electrode cable AE to clamping screw AE, attach elec-
trode cable RE to clamping screw RE, attach electrode cable
WE to clamping screw WE-D.
6. Click on or MAIN WINDOW / Window / Monitor to open the
MONITOR window.
7. Start the measurement by clicking the icon in the MAIN
WINDOW or the button in the MONITORING window.
8. Enter the Sample ID (used as part of the determination file
name) in the
PLACE SAMPLE
window and click
<OK>
.
9. At the end of the measurement, a curve is printed out. This
curve should satisfy the following conditions:
• A symmetrical, gaussian-shaped peak should be
plotted. The evaluation must provide a result for the
peak voltage and the peak current, which are printed
out in the full report.
• The peak voltage E should be -450 … -550 mV.