Instruction Manual

8 How to ...?
797 VA Computrace – Software
246
gle or mixed standard addition solution, its concentration and
its volume is defined.
10. If the standard addition should be done with variable addition
volumes, click the
button in the Volume column to open
the EDIT VARIED ADDITION window, enter the variable addi-
tion volumes in the Addition fields, and close this window by
clicking <OK>.
11. Close the EDIT WORKING METHOD PARAMETERS window by
clicking <OK>.
12. Place the sample solution in the measuring vessel at the 797
VA Computrace stand.
13. Click on or MAIN WINDOW / Window / Monitor to open
the MONITOR window.
14. Start the measurement by clicking the icon in the MAIN
WINDOW
or the button in the MONITORING win-
dow.
15. Enter the Sample ID (used as part of the determination file na-
me) in the PLACE SAMPLE window and click <OK>.
16. Each time a standard addition is required in the MANUAL AD-
DITION
window, add the standard addition solution using a pi-
pette.
Use manual standard addition with solution exchange
In the manual standard addition with solution exchange, a new
sample solution is used for every standard addition. Proceed as fol-
lows:
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. Load the desired method into the WORKING METHOD SPECIFI-
CATIONS
window (see How to Load a method, section 8.4).
4. Select
Standard addition in the Calibration field of the WORK-
ING METHOD SPECIFICATIONS
window.
5. Select Manual in the Addition field of the WORKING METHOD
SPECIFICATIONS
window.
6. Select
Batch with solution exchange in the Technique field of
the
WORKING METHOD SPECIFICATIONS window (is not select-
able with the CVS and CPVS mode).
7. Click
to open the EDIT WORKING METHOD PA-
RAMETERS
window.