Astralpool PC 2000 Manual De Instrucciones página 36

7___CONTROL MODES
7.1___ON / OFF
This is the simplest and most elementary control mode that can be implemented. The metering
device switches on as soon as the measured value exceeds the SET POINT and switches off when
the measured value drops to below a given pre-set value that is defined as HYSTERESIS.
HYSTERESIS makes it possible to prevent the metering device from switching constantly on and
off. Limited hysteresis improves control but to the detriment of the metering device, which will be
subjected to greater wear.
With PULS control, there are three basic variables to be set, which are:
Example:
The diagram shows control of the measurement Set Point with a hysteresis value other than
nought.
SET POINT pH = 7,20 pH (SET)
Hysteresis = 0,10 pH (HIS)
SET POINT CL = 0.90 ppm (SET)
Hysteresis = 0.10 ppm (HIS)
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