9.1.6 Measured variable fluoride
Fluoride Measured Variable
When measuring fluoride as the measured vari‐
able, the sensor signal is converted into a 4 -
20 mA signal by a FPV1 or FP100V1 meas‐
uring transducer, depending on the measuring
range. The measuring transducer is connected
to the controller's mA input. The REFP-SE ref‐
erence sensor is connected to the measuring
transducer using a coaxial cable with an SN 6
plug.
FPV1 measuring transducer: Measuring range
0.05 ...10 mg/l.
FP100V1 measuring transducer: Measuring
range 0.5 ... 100 mg/l.
Measuring range of the measuring transducer
Select the measuring range. The measuring
range is printed on the nameplate of the meas‐
uring transducer. An incorrect measuring range
will lead to an incorrect measurement.
Temperature compensation
This function is used for compensation of the
temperature influence on the measurement.
This is only necessary with pH and fluoride
measurement and when chlorine dioxide is
measured using a CDP sensor.
Temperature: [Off] / [Manual] / [Automatic]
n
[Off]
switches the process temperature
setting off
n
[Manual]
enables the process temperature
to be manually specified, which makes
sense with constant temperatures
n
[Automatic]
uses a measured process tem‐
perature. Automatic measurement of the
temperature using the temperature sensor,
e.g. Pt1000. With pH, temperature com‐
pensation can be switched
[ON]
or
[OFF]
in the menu.
9.1.7 Peracetic acid
Peracetic acid measured variable
Peracetic acid as a measured variable is meas‐
ured via one of the two mA sensor inputs. Tem‐
perature compensation is performed in the
sensor. An additionally connected temperature
sensor is only used for display and data
recording with a data logger and can be issued
on a mA-output via field bus or web server.
Measuring range of the sensors
Select the measuring range. The measuring
range is given on the sensor nameplate. An
incorrect measuring range leads to an incorrect
measurement.
Configuring measured variables
75
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