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Answer Posted / sakram
A 2 wire transmitter never send mA.it acts as load to the
24VDC supply from Anaolg Input module.Assume Transmiter as
a rheostat with resistsnce change based on process
paramaeter changes.
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i have used level transmitter in starch cooking preparation tank. tank total height 2mtr.sometime LT display shows some error value when tank is fully empty and diaphragm side i already checked okay no problem in diaphragm area. field cable checked 24volt and mA shows correct value while tank empty mA is 4mA. 4mA i needed that 0% but display showing 10% or 15% percentage values are varying continously please give any good solution for me.....
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