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SETUP
Set point
General: a set point is a threshold value that will trigger control if the measurement value crosses it.
With a Hi control mode, the measurement approaches the set point from a lower measurement value.
With a Lo control mode, the measurement approaches the set point from a higher value than the set point.
Option:
user selectable
Press the arrow keys to assign the set point value.
"SET POINT" message is scrolled on the bottom of the LCD screen.
Note:
To enter Set point screen, pump control mode must be set as Auto.
Hysteresis / Proportional Band
Hysteresis (On/Off Control only)
On/Off control action turns the output On or Off based on a previously assigned set point. The output
changes depending on pH/ORP changes. To prevent this from happening, a pH/ORP band called
hysteresis is created between the on and off operations.
Proportion band (Proportional Control only)
The proportional band is a control variable and is defined as the amount of change in input, required
to cause the control output to go through 100% of operating range.
Option:
user selectable
In order to set the hysteresis value, automatic control must be enabled, with On/Off control type On.
Press the arrow keys to set the value.
In order to set the proportional band value, automatic control must be enabled, with Proportional
control type on. The pump is continuously on at the set point value with added band.
Press the arrow keys to set the value.
"HYSTERESIS" message is scrolled on the bottom of the LCD screen.
Note:
To enter Hysteresis / Band screen, pump control mode must be set as Auto.
