When the output current of the Rosemount 5400 level gauge is below 9 mA, the current fluctuates between 6 mA and 8 mA; the 475 connection is disconnected
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When the output current of the Rosemount 5400 level gauge is below 9 mA, the current fluctuates between 6 mA and 8 mA; the 475 connection is disconnected
Excluding the influence of interference, there seems to be a problem with the circuit board
Under normal conditions, use 475 to conduct a loop test to see how it works. If possible, try using a different power supply. After doing these two steps, it’s basically possible to determine which part is the problem