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ENGLISH
SETPOINT 1 PH AND SETPOINT 1 RX > EXPERT MENU
SETPOINT1 PH
SETPOINT1 RX
The two programming stages are set out below: when Measurement Type
pH is selected, refer to the left column; when selecting RX refer to the right
column.
The setpoint activates the output relays for the metering pumps or other
devices until the setpoint value is reached.
Setpoint 1 is set (default)
for
operations in ACID mode, the output
is active when the measured value is
higher than the selected setpoint, the
connected pump meters out an acid
product.
Setpoint 1 is set (default) for
operations in DIRECT mode: if the
measured value is lower than the
selected setpoint, the connected
pump meters out chlorine (Oxidising
product).
The unit has an ON-OFF mode which switches on or off (if the reverse mode
is ON) the output relays of metering pumps or other devices.
Modular pulses, also known as PWM “pulse width modulation”, support a
proportional mode on each ON-OFF setpoint, activating the corresponding
pulses on the output relays based on the measured value. When the Expert
Menu is used, other parameters need to be programmed (see OPERATING
FUNCTIONS menu).
SELECTING
“ON-OFF”
THE NEXT PROGRAMMING STEO IS
“HYSTERESIS”
SELECTING
“PROPORTIONAL”
REQUIRES PROGRAMMING THE NEXT STEPS
PWM PROPORTIONAL MODE FOR PH WITH TIMED PULSES
Pulse width: pulses are timed ON and OFF based on the distance from the selected setpoint (programmable),
example: if the selected setpoint is 7.00 pH and the measured value is 9.00 pH, the PWM mode starts after
reaching 8.50 pH with Time/Pause pulses and decreasing the active time while reaching the setpoint.
Cycle Time: the PWM mode has a 60 second cycle (programmable), example: setpoint is 700 mV, measured
value 850 mV = active time 60 sec - pause time = 0 sec; at 7.75 pH active time = 30 sec - pause time = 30 sec…
as a consequence the active time decreases while reaching the setpoint. The cycle time depends on many
variables, such as: distance from the injection point of the system to be treated, how fast or slowly the setpoint
must react, chemical concentration, etc.
Menu Selection
Setpoint 1 (pH)
Menu Selection
Setpoint 1 (RX)
MENU SETPOINT 1 (pH)
Setpoint Value
7.00 pH
EXPERT MENU
MENU SETPOINT 1 (RX)
Setpoint Value
200 mV
EXPERT MENU
MENU SETPOINT 1 (pH)
Metering
Acid
EXPERT MENU
MENU SETPOINT 1 (RX)
Metering
Direct
EXPERT MENU
MENU SETPOINT 1 (pH)
Metering
Alkaline
EXPERT MENU
MENU SETPOINT 1 (RX)
Metering
Reverse
EXPERT MENU
MENU SETPOINT 1 (pH)
Mode
ON/OFF
EXPERT MENU
MENU SETPOINT 1 (RX)
Mode
ON/OFF
EXPERT MENU
MENU SETPOINT 1 (pH)
Mode
Proportional
EXPERT MENU
MENU SETPOINT 1 (RX)
Mode
Proportional
EXPERT MENU
MENU SETPOINT 1 (pH)
Window width
1.50 pH
EXPERT MENU
MENU SETPOINT 1 (pH)
Cycle Duration
60 sec
EXPERT MENU