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Beschikbare talen
Beschikbare talen
● P3: This parameter allows storing the status of the ON/OFF button at the
system shutdown: 0 = at start-up, the pump is always enabled; 1 = at start-up,
the pump restores its status at shutdown.
● P4: This parameter allows setting the pump working mode:
● 0 = OFF (the pump is always off independently from the measured
value: this option allows monitoring the measurement without
intervening, for example, during the plant start-up).
● 1 = ON (the pump is always on independently from the measured value:
this option is used to manually force the dosage, for example, during
the plant start-up or maintenance).
● 2 = ON/OFF acid (this option is typically used for acidification; the
pump activates when the measurement exceeds the "working
threshold + ½ hysteresis" level and deactivates when the measurement
falls below the "working threshold – ½ hysteresis" value).
● 3 = Proportional acid (the pump is definitely active when the
measurement is greater than the "working threshold + ½ hysteresis"
level and definitely off when the measurement is lower than the
"working threshold – ½ hysteresis" value, while for measurements
between these limits the operating time of the pump is proportional to
the distance of the measurement from the limits. The time base is fixed
(90 seconds) and operation follows the trend shown in the table
below):
Measure
% dosage
Pump ON
<= 7.00
0 %
25 %
never
23 s
7.10
7.20
50 %
45 s
7.30
>= 7.40
75 %
100 %
67 s
always
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