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O2X
DUO
5.
Mounting the sensor
Cable Connections
Connect the sensor to the BB1/BB2 control box using the attached M12 connector on
the end of the sensor cable. In the event that two sensors are to be connected to the same
BB1/BB2 control box, use the Y-splitter (P/N 21505534) or 4-way Connection box
(P/N 11505785).
NOTE!
Never try to turn the M12 connector housing on the cable to fasten or remove
the connector, only the fluted ring at the top of the M12 connector shall be turned.
Dielectric paste can be applied to the connector for corrosion protection.
The O2X DUO sensor is mounted on a telescopic fibreglass rod and placed in a
mounting bracket that fastens to a handrail, please refer to the Appendix 1 for further
details. As an alternative way of mounting the sensor, an adjustable SS slide rail holder
is available, please refer to the Appendix 2 for further details.
Note! For best DO measurement, the rod shall be mounted at an angle of 5° – 30°
from vertical.
Installation Tips
•
Adjust the rod so that the sensor is at least 30 cm (12”) below the liquid surface
or the lowest water level in decant applications (SBR’s) to prevent the sensor
from coming out of the liquid.
•
In an aeration tank, ensure that the sensor is not directly above a diffuser head.
To obtain the most representative dissolved oxygen level, the sensor should be
installed on the backside of the rolling diffuser action.
•
In an aeration basin, flushing may not be required if the tank is well agitated. To
verify the need for flushing, remove the sensor from the liquid after it has been
in the liquid for several days. If the sensor is coated with solids, flushing with
water or compressed air is recommended.
NOTE!
The sensor is delivered with the
electrode uninstalled. A yellow plastic cap
protects the electrode connection plug and the
flushing nozzle in the transmitter. The plastic
cap must be removed and the electrode must
be installed and calibrated before the
transmitter is submerged into water (refer to
Section 7). Retain the yellow cap as it may be
used as protection later. Do not press on the
top of the cap if the electrode is installed.
