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why we take 4 to 20 mA as out put of every instrument like
pressure transmittre ?why we cant take 0 to 20mA as output?
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Answer Posted / dinesh regar
when a 0-20mA used therefore insturment is not working i am
not indetified.there insturment are faulty ya supply
problem not sure.
therefore we used the 4-20ma .when supply will coming &
insturment not working.
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