jcraft
Member
Looking for some direction here as to how to scale an AI input. We have an analog level sensor that is 4-20 ma out to a plc 12 bit analog current input card. The level sensor is mounted 15.8" above the bottom of the tank so 0" = 4ma and 15.8" = 20ma. I have the signal coming into the plc which is presently showing approx. 32,000 ( level about 4" away from sensor. Now I need to scale to see how many inches this count is and also how many inches each count is ( Ex. if the count in AI drops from 32,000 to 31,999 then how far did the level drop in inches). Please help. Thanks