Metrohm 757 VA Computrace - Manual (Page 162)

7 How to ...?
757 VA Computrace – Software
152
13. Start the measurement by clicking the icon in the MAIN
WINDOW or the button in the MONITORING window.
14. Enter the Calibration curve id (used as part of the determina-
tion file name) in the START CALIBRATION window and click
.
15. Each time a solution exchange is required in the BATCH SO-
LUTION EXCHANGE
window, replace the solution measured by
the next calibration solution.
Record calibration curve automatically
This method is used for preparing different calibration solutions
by adding automatically several times a concentrated standard
solution to the measuring solution using 665 or 765 Dosimats.
Proceed as follows:
1. Install Dosimats to the 757 VA Computrace Stand (see How to
install Dosimats).
2. Click on or MAIN WINDOW / Mode / Determination .
3. Click on or MAIN WINDOW / Window / Working method
specification to open the WORKING METHOD SPECIFICATIONS
window.
4. Load the desired method into the WORKING METHOD SPECIFI-
CATIONS window (see How to load a method).
5. Select Record calibration curve in the Calibration field of the
WORKING METHOD SPECIFICATIONS window.
6. Select Automatic in the Addition field of the WORKING METHOD
SPECIFICATIONS window.
7. Click to open the EDIT WORKING METHOD PA-
RAMETERS window.
8. Select the Determination tab (see section 5.2) and enter the
Cell volume
and the number of additions in the
No. of additions
field.
9. Select the Substances tab (see section 5.2) and make sure
that for each substance entered in the table the number of the
single or mixed standard solution, its concentration and its
volume is defined. The
No. of the standard solution must be
identical to the number of the Dosimat used for automatic
addition of this solution.
10. If the addition of the standard solution should be done with
variable addition volumes, click the button in the Volume
column to open the EDIT VARIED ADDITION window, enter the