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Calibrating the controller diaLog DACb
96
Remove sample water directly at the measuring point and deter‐
mine the content of the feed chemical in the sample water in
using an appropriate reference method (e.g. DPD, titration etc.).
Enter this value into the controller as follows:
1.
Press
in the continuous display.
2.
Use the arrow keys to select
3.
Continue with
CAL Cl
Latest sensor measured values
Concentration
Sensor current
1) Wait until meas values stable
2) Take sample and continue with <CAL>
Fig. 59: Reference value calibration shows the actual sensor
values
4.
Continue with
CAL Cl
Determine reference value
Measured value upon sampling
Change with <OK>
Fig. 60: Reference value calibration, the sensor value is frozen
here; now take the sample and measure using DPD, for example
5.
Then press
to adjust the ppm value or press
tinue with the calibration
[Slope calibration]
continue with <CAL>
to con‐
[ppm]
A1044
A1045
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