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why we use 4-20 mA for calibration of the instruments.why
we cant use 0-20 mA?
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Answer Posted / sanjay sojitra
The live-zero represented by 4 mA allows the receiving
instrument to detect some failures of the loop, and also
allows transmitter devices to be powered by the same
current loop (called two-wire transmitters)
| Is This Answer Correct ? | 15 Yes | 2 No |
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