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why using 4-20ma not using 0-20or why not using 1-
20ma???????
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Answer Posted / srinivasan narayanan
Most of the Transmitters output used 4 -20mA. This is because to identify whether the transmitters are live or not
if the Transmitter shows 4 mA it's a live Zero
if the Transmitter Shows 0 mA it's a Dead Zero
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