VP-3
User’s Manual
5. Communication
20
or incorrect address settings). If you use an SDI-12 sensor bus we
recommend that you make an independent junction box with
wire harnesses where all sensor wires attach to lugs so sensors
can be disconnected individually if a problem arises. A single
three-wire cable can be run from the junction box to the
datalogger.
SDI-12 Address
The SDI-12 protocol requires that all sensors have a unique
address. VP-3 sensors come from the factory with an SDI-12
address of 0. To add more than one SDI-12 sensor to a system,
the sensor address must be changed. Address options include
{0...9, A...Z, a...z}. The best and easiest way to change an address
is to use Decagon's ProCheck (if the option is not available on
your ProCheck, please upgrade to the latest version of firmware).
SDI-12 addressing can be accessed in the "CONFIG" menu by
selecting "SDI-12 Address." Addresses may then be changed by
simply pressing the up or down arrows until you see the desired
address and pushing "Enter."
The SDI-12 communication protocol is supported by Campbell
Scientific dataloggers like the CR10X, CR200, CR1000, CR3000,
etc. Direct SDI-12 communication is supported in the "Terminal
Emulator" mode under the "Tools" menu on the "Connect"
screen. Detailed information on setting the address using CSI
dataloggers can be found on our website at http://
www.decagon.com/support/downloads.
