why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

Answer Posted / kambiz

why 4ma show higher zero ?
i have transmiter flow renge 0-1000 m3/h but 4 ma show in
monitoring 200 m3/h and 20 ma show 1000 m3/h i want when 4ma
show 0 m3/h and 20ma 1000m3/h

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