PRONOVA FOS/TAC 2000, Руководство пользователя

Страница: 15 / 31

FOS/TAC 2000 CALIBRATION
812-04.2015-EN FOS/TAC 2000 User Manual 15
6.3 Start measurement
In order to perform the analysis, place the beaker containing the diluted sample and the stir stick onto the magnetic stirrer and dip
the electrode system into the sample. In the main menu, use the

and

keys in order to select the “Measurement” menu option
and click “OK” to confirm. When the display shows the “Click OK to start measurement” message, click <OK> in order to start the
measuring process.
The measuring process then takes place fully automatically. The magnetic stirrer is switched on and the hose pump adds the
titration solution. On completion of the measuring process, the result appears on the display. The values measured should be
recorded and compared to previous measurements and/or plant-specific setpoints.
Finally press <ESC> to return to the main menu.
On completion of the measuring process, rinse the electrode, dry and dip in KCl solution. For this purpose, fill KCl solution into the
protective sleeve to a level of approx. 10mm and push the sleeve over the electrode.
During transport or storage, KCl solution can leak from the protective cap and produce crystalline, white potassium chloride. This
salt layer has no influence on measuring capability and can be easily rinsed off with water.
7 Calibrating the pH electrode
7.1 General information
In order to ensure correct measuring results within the specified tolerances, the analyzers and systems must be calibrated at regular
intervals. The pH electrode is calibrated using the buffer solutions supplied.
Note that incorrect calibration leads to incorrect results during subsequent measurements!
Whenever changing to the next buffer solution, always rinse the electrode with distilled water.
Please note that the temperature must be the same for the two calibration fluids for pH4 and pH7.
Dispose of buffer solutions after use!
Values:
FOS 3.82
TAC 9.32
FOS/TAC 0.41 Measuring
Calibration
Stirrer
A/D Values
Start
Measuring
with
< OK >
Measuring
active
__________
OK OK