Operation 27
AZURA® Conductivity Monitor CM 2.1S Instructions, V6710
This is normally not necessary and is a sign of contamination or clogging
of the CM flow cell. A typical sign of this is that the zero value (with water)
deviates strongly from zero.
Since the conductivity monitor cannot be calibrated automatically, you
have the possibility to set a value for the shift of the measured values
between -10.0 % and +10.0 % in the
OFFSET menu to make the analysis
result more comparable.
The monitor has been switched on.
Process
Display
1.
Press both arrow keys.
2.
Hold down the left arrow key and use the right
arrow key to scroll until the correct display
appears.
3.
Let go of the arrow keys and press the left or
right arrow key to select a value.
Enter additional settings or start the analysis.
5.8 Calibrating the pH electrode
To calibrate the pH electrode for initial start-up, you use the preset value
of pH 7 and a second value according to the calibration solution in use
(e. g. 4, 10). Please pay attention to the indicated measuring values in mV
to control the cor rect pH values in the second line of the monitor display.
Benchmark values can be taken from the succeeding table.
pH
Measuring value
pH
Measuring value
2
+300
8
-60
3
+240
9
-120
4
+180
10
-180
5
+120
11
-240
6
+60
12
-300
7
+/-60
The monitor has been switched on.
1.
Remove the pH electrode from the system.
2.
Thoroughly rinse the pH electrode with water.
3.
Immerse the pH electrode in a calibration solution and then calibrate
it according to the process (see table below).
4.
Re-integrate the calibrated pH electrode into the system.
Prerequisites
Next steps
Prerequisites
Procedure
