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Calibration process selection
15.1.3.2
2-point fluoride sensor calibration (CAL)
Calibrating the controller diaLog DACb
1.
Continuous display ➨
CAL F -
1 ppm =
Slope
Single point calibration
Two point calibration
Fig. 52: Calibration menu [Fluoride]
ð The calibration menu is displayed.
2.
Using the arrow keys select the desired menu item. Press the
key
ð You can now start the selected calibration process.
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:
Two test containers with calibrating solution
n
Measuring and control behaviour of the controller
during calibration
During calibration the actuating outputs are deacti‐
vated. Exception: a basic load or a manual control
variable has been set. This remains active. The
measured value output [standard signal output mA]
is frozen, corresponding to its settings in the mA
output menu.
When calibration/testing has been completed suc‐
cessfully, all of the error checks relating to the
measured value are restarted. The controller saves
all the determined data for zero point and slope
upon a successful calibration.
185.0 mV
16:51:18
11/11/2011
-59.16 mV/dec
11:11:11
100 %
11/11/2011
A1037
89
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