To modify this protection, edit “pH Menu” - “Dosing control pH” - “Max. ON” value. The allowed
range is between 30 and 720 minutes.
ALARMS
Two alarm setpoints are available for pH: Alarm high and Alarm low.
The ALARM LED and relay are activated when the pH value is higher than Alarm high or lower than
Alarm low.
To modify the alarms setpoints, enter the “Alarms pH” menu and edit “Alarm Hi” value or “Alarm
Lo” value.
The alarms can be separately activated or inactivated.
To modify the alarms status, enter the “pH Menu” - “Alarms pH” menu and edit “Alarm Hi” status
or “Alarm Lo” status. When the status is set to “Inactive”, the alarm is ignored.
Note: The Alarm high value must be greater than Alarm low value. The analyzer display a
warning if the settings are incorrect.
The Alarm high Setpoint and Alarm low setpoint could be quickly consulted on one pH measuring
panel. When an alarm is disabled, the —.— is displayed instead of alarm value.
Overdosing protection
To prevent overdosing a “Detector Error” is generated if the dosing command is on for the “Max. ON“
time and the read value is changing less than pH 0.1.
The acid/alkali dosing is stopped and the SYSTEM ERROR LED starts blinking. The dosing could be
resumed only by restarting the controller.
pH SETTINGS (PCA320, PCA330, PCA340)
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