H-4161 – Xylem H-4161 User Manual
Page 12
2-4 Installation And Maintenance
H-4161
2.12 Testing with Module Mode = 0 (monitor)
Use the following procedure to verify your H-4161 is working properly. These tests will also help you
understand how the H-4161 works.
1. Make the connections to the SDI-12 input and the 4-20mA output. Connect the sensor to be monitored
to your data logger. Your loop power source, loop receiver and the H-4161's output should all be
connected in series. In addition, temporarily connect a current meter in series with the 4-20mA loop.
Make certain there is 5.5 to 35V across the 4-20mA output terminals.
Make certain the H-4161 is receiving +12V power from the SDI-12 data bus.
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