Honestly it’s very difficult to find books or references which explain clearly why analog signal 4-20 mA is used on electric signal transmission. I remember I saw somebody gave his opinion in a mailing list but I forget already what he told exactly and unfortunately I lose the email by now. Sometimes I think 4-20 mA [...]
Filed under: Engineering | Tagged: 20 mA, 4 mA, 4-20 mA, Signal | 6 Comments »
