ProMinent DULCOPOOL Montage- Und Betriebsanleitung Seite 110

Operation and user interface
pH measuring channel in downstream mode
Fig. 27: pH measuring channel in downstream mode
1 Proportional value, e.g. 0.20 pH
2 Hysteresis value, e.g. 0.20 pH
I Measuring
II Proportional band
If the feeder assembly of the pH measuring channel is configured in downstream mode, then this
key is used to select the value of the proportional band (1) or the hysteresis value (2) depending on
the type of control previously selected.
The control request is 100% if the error (setpoint measured value) in proportional mode is equal to
the proportional range (II). Reducing the value of the proportional band increases the metering con‐
trol for the same measured value.
If the error (setpoint measured value) in hysteresis mode is greater than the hysteresis value (V),
then the control request is 100%.
42
Proportional
Hysteresis
value
value
III Setpoint
IV Pump command
V Hysteresis
A2823