Metrohm 797 VA Computrace User Manual

Page 258

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

11. Close the

EDIT WORKING METHOD PARAMETERS

window by

clicking

12. Place the sample solution in the measuring vessel at the 797

VA Computrace stand.

13. Click on

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

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

MAIN WINDOW

/ Mode / Determination

2. Click on

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.