0000137188 Rev. 1.0
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9.2
ON/OFF pH dosing
The instrument allows the chemical measurement to be controlled and modified through
the pH Set Point automatically; adjusting the dosing though the pH motor controlled in
ON/OFF.
The dosing below is obtained by setting the following parameters:
Set point pH = 7.20 pH
Type of Dosing = Alkaline
Set Point pH
Motore pH
9.3
Alarm for the pH Set Point
When the alarm band is set, a work window is created. If the allowed limits are exceeded the alarm relay
closes and remains closed until the measurement is reset or the enter key is pressed to deactivate the
alarm.
When the OFA time (Over Feed Alarm) is set, the dosing time of Set Point pH in time is controlled with two
alarms:
First alarm at 70% of the time set is seen on the display, the alarm relay closes.
Second alarm at 100% of the time set is seen on the display and the alarm relay closes and the
pH motor is blocked.
Press the Enter key to eliminate the alarm and initialise the OFA time.
Motore pH
Set Point pH
ALR Relè
ALR Band
ALR Band
