EN
10
| BL220 PERISTALTIC PUMPS
P2: This parameter allows to configure the working mode of level contact: 0 = NO (normally open,
standard configuration) 1 = NC (normally closed, fail-safe mode).
P3: This parameter allows to store 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 to set the pump working mode:
0 = OFF
the pump is always off, independently from measured value: this option allowsto
monitor the measurement without intervening, for example during the plant start-up
1 = ON
thethe pump is always on, independently from measured value: this option is used
to manually force the dosage, for example during the plant start-up or maintenance
2 = ON/OFF acid
thethis option is typically used for acidification; the pump activates when
the measurement exceeds the “working thr 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 thr ½ hysteresis” level, and definitely off when 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 measurement from
the limits. The time base is fixed (90 seconds) and operation follows the trend shown in the
table below:
Measurement = pH ; Working threshold = 7.20 pH ; Hysteresis = 0.40 pH
Measure
<= 7.00
7.10
7.20
7.30
>= 7.40
% dosage
0 %
25 %
50 %
75 %
100 %
Pump ON
never
23 seconds
45 seconds
67 seconds
always
Pump OFF
always
67 seconds
45 seconds
23 seconds
never
4 = ON/OFF chlorine
this option is typically used for chloration or alkalinization; the pump
activates when the measurement is lower than the “working threshold – ½ hysteresis”
value, and deactivates when the measurement exceeds the “working thr ½
hysteresis” level
5 = Proportional chlorine
the pump is definitely active when the measurement is lower
than the “working threshold – ½ hysteresis” value, and definitely off when measurement is
greater than the “working thr ½ hysteresis” level, while for measurements between
these limits, the operating time of the pump is proportional to the distance of measurement
from the limits. The time base is fixed (90 seconds) and operation follows the trend shown
in the table below:
Measurement = Redox ; Working threshold = 680 mV ; Hysteresis = 20 mV
Measure
<= 670
675
680
685
>= 690
% dosage
100 %
75 %
50 %
25 %
0 %
Pump ON
always
67 seconds
45 seconds
23 seconds
never
Pump OFF
never
56 seconds
45 seconds
67 seconds
always
