Ofs Softening Control, Инструкция по эксплуатации, Страница: 8 / 28

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7. General overview of the device
Softening Control is an online water hardness measuring system for continuous monitoring of
water hardness differences between process inlet and process outlet of a connected water sof-
tening system based on cation exchange.
By using of bypass technology the device extracts time controlled or flow rate depending
minimal amounts of raw or soft water from the process, evaluates the residual hardness and
alerts with exceeding of a preset threshold value. The threshold value can be parameterized by
DIP-Switches with individually defined steps of 0.25% up to 10% residual hardness in refer-
ence to 100% raw water hardness.
The measurements will be carried out cyclically every 15 minutes in a flow-through chamber
where a selective sensor for calcium and magnesium ions operates in an environment protect-
ed against pressure. In each measurement cycle the water sample stays a preset period in the
measurement chamber and will be evaluated after a preset resting time. The measurement
cycle can be controlled alternatively by impulses of a connected water meter or a potential
free closer.
By automatic opening and closing of the upstream stop valves the water samples will be re-
placed and rejected free of pressure. With exceeding of threshold value a potential free switch
will be activated with a delay of 1or 10 minutes. With recognizing of an interference or need
of sensor exchange a second potential free switch will be activated.
Measuring functions and their results are represented with colored LEDs. At the same time
the measurement value will put out through a current loop 4…20mA.
In intervals of five days the sensor quality will be checked. If the result does not comply with
the predefined minimum requirements, the need for sensor exchange will be signalized.
optional
connection water meter
optional
external signal output
power supply unit
100 … 240 V AC
50 … 60 Hz
reserve connection
raw water
me
as
ure
me
n
t c
ha
m
be
r
Ventil RW
Ventil WW
soft water
sensor
valve
raw water
filter
V
softener
raw water soft water
pressure
free drain
valve
soft water
filter