32
PUMP CONTROL
Hi control mode on the BL100
Set
point
Set
point
Regulator
output
Regulator
output
Hysteresis
Hysteresis
Measured
value
Measured
value
ON
OFF
ON
OFF
Relay on continuously
at the configured flow rate
Relay on continuously
at the configured flow rate
Lo control mode on the BL100
On/Off Control
Proportional Control
With Proportional control enabled in SETUP, the dosing time depends on the difference between pH
(or ORP) value and assigned setpoint.
Set
point
Set
point
Regulator
output
Regulator
output
100%
100%
Band
time
proportional mode
with 0.25L/h
time
proportional mode
with 0.25L/h
Band
speed proportional
0.25L/h
flow rate
SETUP
0.3÷3.5L/h
Flow rate
Set value
Measured
value
Measured
value
Flow rate
Set value
speed proportional
0.25L/h
flow rate
SETUP
3.5÷0.3L/h
0.25L/h
90%
50%
15%
0.25L/h
90%
50%
15%
Proportional Control
with Hi Control Mode and Band as illustrated
Proportional Control
with Lo Control Mode and Band as illustrated
An overview of pH proportional control is presented in the graph below.
0.1
The same principle applies to ORP control.
8.2. MANUAL CONTROL
• From measurement mode, long press the arrow keys together to manually activate the pump.
• To exit from manual control, release the two keys.
• During the manual control, the LCD backlight is light green.
