© 2021, Delta-T Devices Ltd Page 6
Using external power
Wiring diagram for connecting a WET150
(or SDI-12 network) to the SDI-12 channel
of a GP2 logger using an external
permanent power supply or battery
connection (which should be appropriately
fused).
Here the SDI-12 power is permanently on. If you only
want the external power switched on when needed then
feed the 12V (white) cable through one of the GP2 relays
and select the relay, e.g. RLY1, for the DeltaLINK
program’s Measurement, Power channel
See also SDI-12 for GP2 User Manual.
GP2 configuration
You need a PC running DeltaLINK version 3.9 or later and connected to the GP2. For
help on this see DeltaLINK Help “How to Connect to the logger”
1. Connect the WET150 directly to the GP2 with the supplied cable.
2. Start DeltaLINK:
◼Click on Program and select Change.
◼Right click on Channel 1 and select WET150 from the drop-down menu.
◼To change the default settings, double click on an Input channel to open
Input Channel Properties, where you can change the Units, Soil type and
Data storage settings.
◼Set the Recording Interval in the Program window...
… there are many other options - refer to the GP2 user manual for details.
◼When finished, click on Apply to install the program in the logger.
3. To check the connections, select the Sensors tab and click on Read now to see
the WET150 readings.
4. When ready, select the Logger window and
click on Start to start logging…
5. …later to collect the data, connect to the GP2
and select the Dataset window from which you
can retrieve and display all stored readings.
