6
OPERATION
This option has the advantage of creating a direct connection and minimizes the chance of
the sensor becoming unplugged. However, it then cannot be easily used in the future with a
METER readout unit or data logger.
Option 2
Obtain an adapter cable from METER.
The adapter cable has a connector for the stereo plug connector on one end and three wires
(or pigtail adapter) for connection to a data logger on the other end. The stripped and tinned
adapter cable wires have the same termination as in
: the brown wire is excitation,
the orange is output, and the bare wire is ground.
NOTE: Secure the stereo plug connector to the pigtail adapter connections using adhesive-lined heat shrink to ensure
the sensor does not become disconnected during use.
2.3 COMMUNICATION
The SDI-12 protocol requires that all sensors have a unique address. ATMOS 14 sensor
factory default is an SDI-12 address of 0. To add more than one SDI-12 sensor to a bus, the
sensor address can be changed using a ZSC Bluetooth
®
sensor interface and the ZENTRA
Utility Mobile app as described below:
NOTE: The sensor SDI-12 address must be returned to 0 to work with ZENTRA loggers.
1. Using a mobile device, open the ZENTRA Utility Mobile app.
2. Connect the sensor to the ZSC.
3. Under Sensor Information, select the SDI Address dropdown.
4. Scroll through the options and select the desired SDI-12 address.
NOTE: Address options include 0-9, A-Z, and a-z.
The sensor address can also be changed using the PROCHECK handheld device.
1. Using a PROCHECK connected to the sensor, press the
Menu button to bring up the
CONFIG
menu.
NOTE: If the PROCHECK does not have this option, please upgrade its firmware to the latest version from the
webpage.
2. Scroll down to
SDI-12 Address
. Press
Enter.
3. Press the
UP or DOWN arrows until the desired address is highlighted.
Address options include 0...9, A…Z, and a…z.
4. Press
Enter.
Detailed information can also be found in the application note
METER digital sensors using Campbell Scientific data loggers and LoggerNet
.
When using the sensor as part of an SDI-12 bus, excite the sensors continuously to avoid
issues with initial sensor startup interfering with the SDI-12 communications.
