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15.1.3.3
1-point fluoride sensor calibration (CAL)
Calibrating the controller diaLog DACb
CAL F -
Two point calibration
Immerse sensor in buffer 2
Sensor value
Sensor voltage
Start with <CAL>
Fig. 55: Fluoride sensor calibration (CAL)
8.
Immerse the sensor in test container 2 with calibration solu‐
tion. When doing so gently move the sensor
9.
Then press
[Calib. in progress]
ð
10.
Then press
to adjust the ppm value or press
tinue with the calibration
11.
Then press
12.
Import the result of the calibration into the controller memory
by pressing the
ð The controller displays the continuous display again and
operates with the results of the calibration.
Incorrect calibration
Should the result of the calibration lie out‐
side the specified tolerance limits, an
error message appears. In this case the
current calibration will not be applied.
Check the prerequisites for the calibra‐
tion and clear the error. Then repeat the
calibration
Correct sensor operation
Correct measuring and metering is only pos‐
–
sible if the sensor is working perfectly
–
Observe the sensor operating instructions
The carrying out of a 2-point calibration is
–
strongly recommended and is to be preferred
to other methods
For calibration the sensor must be removed
–
and refitted in the in-line probe housing. To do
this, observe the operating instructions of your
in-line probe housing
Material required for calibration of fluoride sensors:
One test container with calibration solution
n
4.88 ppm
144.2 mV
.
key
A1041
to con‐
91
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