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6.
Troubleshooting and Maintenance
Troubleshooting
The following checklist will help in troubleshooting problems:
Problem
Possible Cause
No data
Faulty wiring -- check all wiring and terminations
No power -- check the fuse in the data recorder and power at
sensor. There is no fuse in the sensor itself.
Wrong address requested -- make sure the data recorder is set
up to request data at the proper address
Wrong address set in sensor -- use the identify command to
make sure the sensor is responding to the proper address, if
not double check internal address dip switches since on
power-up they override any address set by the software.
Command or address is wrong case -- all commands are
capital letters, make sure address is proper case and
commands are upper case.
Garbled data
Multiple sensors set to the same address -- check address
settings of all SDI-12 sensors. Remove all other sensors
from the recorder and add them one at a time. Note: SDI-12
communication is defined to be 1200, E, 7, 1.
Command issued to a wild card address (* or ?). Remove all
other sensors from the recorder and try again.
Maintenance
The SDI-12 AnalogPlus module is designed to operate for extended periods with very little or no
maintenance required.
