Ofs Softening Control, Инструкция по эксплуатации, Страница: 9 / 28

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Once a day a sensor forming will take place in row water, which purposes of an increasement
of the sensors service quality. The sensor forming will take 17 minutes. During this time no
water hardness measurement will take place.
The measurement system can set in off-line-mode by a connected potential free closer. In this
mode no measurement will take place.
The measuring system is automatically calibrated by time controlled automatic change over
from soft water to raw water. There is no need for additional indicators or reagents.
8. Characteristics

Water hardness of raw water will be defined automatically with 100%.

Water hardness of soft water will be determined in percentages and rated to a fixed
threshold value, given by a DIP-switch.

The difference value shows the actual efficiency of the softening plant.
The threshold value can be defined individually in steps of 0.25% up to 10% in refer-
ence to the row water hardness.

Displaying of the measurement results by colored LEDs in traffic lights position.

Possibility for connection for monitoring of an external mechanical contact water meter
at outlet of softener system with an impulse sequence ~ 1 second/impulse

Time controlled cyclic measuring with measuring breaks of 15 minutes between two
measurements or process controlled continuous measuring when soft water is being re-
leased and the contact water meter is registering impulses

Parameterizing by DIP-Switches at the device

Detection of high brine concentration in soft water

Self monitoring of hardness sensor with signaling on need for replacement

Output of indicated value through 4 to 20 mA current loop