Xylem H-5223 - Manual (Page 50)

Chapter 4
Maintenance/Trouble Shooting
4.1 Maintenance
Sustained operation of the H-5223 is almost maintenance-free. There are no desiccant or
serviceable parts to maintain. As with any precision instrument, the calibration should be
checked or verified on a regular basis.
4.2 Trouble Shooting
It is unlikely that this manual will ever contain trouble shooting tips to cover every problem that
will be encountered. Feedback from customers is very valuable and greatly aids in the quest for
constant product enhancement. Please feel free to call the factory for technical assistance and
also with solutions you have found to past problems.
Our experience with DCP’s has taught us a lot about the problems associated with field installed
equipment. The following list of problems and possible solutions will undoubtedly grow with
subsequent revisions of this manual and may be helpful to you.
No SDI-12 Response From SDI-12 Sensor:
1 - Verify power to the sensor.
2 - Check all SDI-12 connections, power, data and ground.
3 - Check the pin out of your Sensor for correct wiring.
4 - Make sure all sensors have a unique address.
5 - Test the sensor with it being the only sensor connected to the data logger.
Intermittent Data:
1 - Check your power and ground connections. Moisture over time will oxidize and
corrode connectors and pins.
2 - Verify your power supply or battery voltage. As the power supply approaches the
lower threshold of the H-5223 supply range, it may begin to miss readings
intermittently.
3 - Read the status messages, Min, and Max values, and system resets of the H-5223 for
a possible malfunction or clue to the problem.
H-5223
Maintenance/Trouble Shooting 4-1