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10.3
Operating tests
10.3.1
Test of water quality
By temporary interruption of power supply Softening Control re-starts the measurement and
proceeds a new calibration independent of preset measuring cycle. Provided that the quality of
soft water is really below the parameterized threshold value, upon completing the measure-
ment result will be displayed by the luminescent green LED and the current loop comes into
operation.
In case of exceeding the threshold value re-calibration will be done. If this results once again
in an exceeding threshold value, an external threshold value alarm will be signalized accord-
ing to the preset alarm delay at DIP 6 and the measurement will be repeated until a lower de-
viation is discoverable cyclically.
10.3.2
Test of external signaling
A threshold value can be initiated, if the soft water supply will be external and manually
closed, whereby the raw water cannot be flushed out of the measuring chamber by the soft
water. With repeated recognition of the exceeded threshold value the relevant threshold value
relay will be switched after expiration of the delay preset at DIP 6 until a lower deviation is
discoverable again.
A service alarm can be initiated by disconnection of the plug-in connection to the hardness
sensor. Upon a short time the green and red LED will be flashing and the relay for service
alarm will be switched until the sensor will be recognized.
10.3.3
Test sensor performance
If, after short operating time of the sensor, sensor alarm is output (all three LED are flashing),
the sensor quality can checked once more by a further calibration. The calibration can be trig-
gered by a short-term interruption of the power supply. If the sensor alarm appears again, the
sensor must be replaced.
If the operating time of the sensor is significantly below the indicated operating time, the sen-
sor should be sent to the manufacturer for review.