OxyMax W COS 41 5 Commissioning
Endress+Hauser 15
5 Commissioning
5.1 Function check
Before the first commissioning, make sure of the following points:
• That the sensor was correctly installed (Post-installation check, see Chapter 3.5)
• That the electrical connection is correct (Post-connection check, see Chapter 4.3)
If using an assembly with automatic cleaning, check the correct water connection at the
assembly rinse connection.
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Warning!
Danger of medium escaping.
Before applying compressed air to an assembly with cleaning facility, make sure the
connections are correctly fitted. Otherwise, the assembly may not be insert into the
process.
5.2 Polarisation
The sensor was tested in the factory for perfect functionality and is supplied ready for
operation.
To prepare for calibration, proceed as follows:
• Remove the sensor protective cap.
• Place the externally dry sensor in atmospheric air.
The air should be saturated with water vapour. Therefore, install the sensor as close
to the water surface as possible. When calibrating the sensor membrane, make sure
the membrane remains dry.
Therefore, avoid any direct contact with the water surface.
• Connect the sensor to the transmitter and switch on the transmitter.
• If you connect the sensor to the transmitter Liquisys M COM 223/253-DX/DS,
polarisation is automatically performed after switching on the transmitter.
• The polarisation time takes about 1 hour.
Polarisation starts high, then drops gradually. You will recognise the end of polarisation
when the display stabilises and remains practically constant.
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Caution!
When you remove the sensor from the medium, protect the sensor from strong sunlight.
Make sure you comply with the instructions for commissioning and calibration in the Op-
erating Instructions of the transmitter.
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