Decagon Devices ECH2O EA-10 Podręcznik integratora - Strona 9
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2. Installing the EA-10
wire) can be connected to a shield terminal, if avail-
able, or left open. The probe is electrically floating,
and the shield is not electrically connected to the
probe circuitry. Extension wire can be used to connect
the EA-10 to the 4-20 mA receiver. The extension
wire should be a 2 conductor shielded, direct burial
cable.
NOTE: It is essential that sensor wire connec-
tions be watertight! Use wire nuts with grease or
silicon gel caps for all splices.
Extension Cables
Decagon supplies bulk cable for use as extension
cables with the EA-10. For most applications, we rec-
ommend sealing the connections from the elements to
maintain a good connection and to prevent corrosion.
Decagon supples 2 conductor shielded cable, and this
is the best type to use if you supply your own cable.
Hardware Requirements
The EA-10 is designed to work with industrial control
and acquisition devices. The EA-10 is loop powered,
drawing its operational power from the current used
to measure volumetric water content. Any device
capable of producing a 7 - 32 mA loop voltage should
be compatible with the EA-10. The EA-10 is also
reverse-polarity protected. If it is installed in the
wrong direction, it will not operate, but will be pro-
tected from electrical overload.
NOTE: The EA-10 is intended for use with indus-
trial control and acquisition devices which can
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