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O2X
DUO
8.
Cleaning the Sensor
The sensor is equipped with built-in flushing nozzles. The nozzles are used to direct the
cleaning medium, compressed air or water, via a flushing hose that is connected to the
top of the sensor. The air or liquid is controlled with a solenoid valve that is wired into
the BB1/BB2 control box. Please refer to the technical description for allowed pressure.
Note!
Pay attention to the requirements for protection against backflow, according to
the EN 1717 standard for drinking water devices. If possible, use plant reuse water or
effluent water for cleaning.
Flushing must be activated in the “Settings” menu in the BB1/BB2 control box:
•
Select the O2X DUO sensor in the Main Menu by using the or buttons,
•
Press ENTER for five seconds to enter the Sensor Menu.
•
Use the arrows to select “Cleaning” and press ENTER.
•
If the sensor is to be cleaned as master, i.e. it has its own relay, then set the
“Cleaner” setting to “flush”, specify the cleaning interval in minutes, and the
flush time in seconds. If the sensor is to be cleaned as a slave, along with
another sensor, then these parameters are set for the sensor being the master.
Specify the freeze time in seconds after the flush for recover.
•
If the sensor shall be cleaned as master, specify the relay to be used according to
the wiring inside the control box. For example, if the solenoid is wired to relay
#1, select “#1” for flushing. If the sensor is to be cleaned as a slave, specify
“Along #1” or “Along #2” depending on what relay the master sensor uses.
•
For sensors configured as masters, “Next time” displays the next time flush will
be activated, pushing ENTER will set it to current time and start cleaning
cycle.
•
Our recommendation is max flushing one time/hour and at max 2 bars pressure.
•
Flush as little as possible, flushing wears the surface of the electrode/cell.
Excessive flushing reduces the lifetime of the electrode/cell.
•
Try flushing twice per day (720 minutes interval, 5 seconds length). If this
doesn’t keep the electrode/cell clean, first reduce the interval, then increase the
flushing time.
•
Never flush when the electrode/cell is not installed.
•
When the electrode/cell is not installed, the yellow plastic cap should be kept on
the end of the sensor for protection.
Flushing
Flushing tube
Sensor cable
