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Calibrating the controller diaLog DACb
15.1.8.3
Calibrating conductive conductivity, temperature coefficient
[Temp. coefficient]
Check the
110
11.
Apply the result of the calibration into the controller memory
by pressing
or cancel the process with ESC.
ð The controller shows the calibration menu again and
operates with the results of the calibration.
Incorrect calibration
Cell constant, valid range: 0.005 ... 15
1/cm
An error message appears if the result of
the calibration lies outside the specified
tolerance limits. In this case, the current
calibration is not carried over.
Check the prerequisites for calibration
and eliminate the error. Then repeat cali‐
bration.
Prerequisite for calibration. The conductivity sensor is connected.
The conductivity sensor is in a suitable liquid, e.g. a sample from
the bypass fitting.
1.
Press
in the continuous display.
2.
Use the arrow keys to select the channel which should be
calibrated.
3.
Then press
ð You will see the display with the menu for selection of
[Cell constant] or [Temp. coefficient] .
4.
Use the arrow keys to select
5.
Continue with
.
ð You will see the current data for the
6.
Continue with
.
ð The sensor signal stability will be displayed – the tem‐
perature values relate to the temperature difference of
the medium:
low (< 10 °C is too low),
n
good (> 10 °C is good),
n
very good (> 15 °C is very good).
n
is displayed if the bar graph is in the "good" area.
7.
Warm up the conductivity calibration solution by at least 10
°C but better by 15 °C while the conductivity sensor is in the
conductivity calibration solution.
ð The
[Sensor signal stability] bar moves now to the right.
[low] is displayed, then repeat the process at a tem‐
If
perature of 1 ... 2 °C higher. If
played, then the sensor is faulty. With
[very good] , continue with
[Temp. coefficient] .
[Temp. coefficient] .
[low] continues to be dis‐
[good] and
.
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