METER HYDROS 21 GEN 1, Руководство пользователя, Страница: 10 / 22

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HYDROS 21
2.3 COMMUNICATION
The HYDROS 21 communicates using two different methods:
• DDI serial string
• SDI-12 communication protocol
To obtain detailed instructions, refer to the HYDROS 21 Integrator Guide .
The SDI-12 protocol requires that all sensors have a unique address. HYDROS 21 sensor
factory default is an SDI-12 address of 0. To add more than one SDI-12 sensor to a bus, the
sensor address must be changed as described in these steps.
1. Using a PROCHECK connected to the sensor, press the
MENU button to bring up the
Configuration tab.
NOTE: If the PROCHECK does not have this option, please upgrade its firmware to the latest version from the
METER Legacy Handheld Devices 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 Setting SDI-12 addresses on
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.