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Installation
2.4 WL3100 Connection
12 +12V DC Power
Da SDI-12 Data
0V 0V DC Power
+S +ve 4-20mA Signal
-S - ve 4-20mA Signal
The WL3100 measures the river-line pressure and provides water level information. Wiring connections to the WL3100
are via a 6 way plug-in terminal block underneath the HS40 Compact enclosure. You must have +12V and 0V power for
the WL3100 to operate. You may connect the SDI-12 and the 4-20mA interfaces at the same time. (These terminals
are “screwless” and keep a constant tension on the wire, thus producing a more reliable connection – simply use a
screwdriver to push on the orange lever to release the terminal spring tension, to insert or remove the wire.)
You may connect the WL3100 to the same battery used to power the compressor, but it is advised to cable it directly
back to the battery – so that any voltage drops that occur down the compressor power cables, are not seen by the
WL3100.
(Consult the WL3100 Manual for a detailed description of the WL3100 connection, operation and specific SDI-12
commands – available on the HyQuest Solutions website)
If connecting to the 4-20mA interface, make sure that the data logger (or RTU) powers up the 4-20mA loop long
enough for the WL3100 to recognise it, take a measurement and put the result back on to the 4-20mA loop. (1 sec
when “Sampling Mode” is set to “Avg X” and 15 secs when “Sampling Mode” is set to “Single”)