9
Configuration
OFF
ON
5’
0
25%
50%
75%
10’
Salida al 100%
25%
50%
75%
Salida al 25%
OFF
ON
5’
0
25%
50%
75%
10’
25%
50%
75%
- Limit out:
If a 4-20 mA output is used, this parameter allows you to limit the output value so as to limit the maximum
dosing pump flow rate.
- Pump:
Enter the rated dosing pump flow rate to record the dosed flow rate in the data logger.
- Hysteresis
For neutralisation with acid and base, enables a margin to be set around the setpoint where no regulation
will take place.
which the output will be ON for the proportional part of the time corresponding to the regulating output.
4.4.2 Advanced control configuration. PIQ control
For adjustment of pH, the control system operates using a PI algorithm. The setting parameters for this
control are in the PI CONTROL menu
PH CONTROL
CONTROL
PI CONTROL
ENT
PH PI CONTROL
PIQ (PpH)
030
Kp
:
20
Ki
:
30
T
delay:
020
s
Q test:
00.00 m3
h
- PIQ (PpH):
The PIQ control mode to adjust pH is a PI algorithm conditioned on the flow rate of water to be treated.
Initial dosing proportional to the water rate is set using the PpH parameter, and is subsequently corrected
by means of a PI approximation curve. This system, which can only be activated with independent pumps
(type mA outlets for acid/alkaline dosing), ensures pH stability even with highly variable flow rates and
provides greater agility in reaching and maintaining the
setpoint.
PpH=0 PI control. PIQ control disabled.
PpH= 1 - 200 Acid dosing will be proportional to the water flow rate with setpoint adjustment by means
of a PI algorithm. The proportion is indicated by the PpH parameter and is referenced to 100,000 units of
water flow.
