The pressure sensor passes, 4-20MA signal how programming can use it.
First of all, what you need to do is to do a A/D conversion first, and make the analog signal into a digital signal before you can read it with your program.Analog signal - A/D conversion - Software - displayAs for how to display, it depends on the type of protocol you use with the A/D module and your own programming.As for how to program, if you don't, you should learn more.
You need to have an acquisition module that converts the analog to digital.As some conversion module ART-3048F or Advantech can.
Using I/V mode for data conversion is ok.Two methods:1 after the I/V conversion, the direct ADC sampling, calculated the 4mA current corresponding voltage, this value is set to the output display of 0, after the 4~20mA linear output is required.2 make a -20mA corresponding decompression benchmark [this voltage reference a lot, after partial pressure to get], connected to the circuit against 4mA, and then in accordance with linear output can.The so-called I/V conversion is the current input, through the appropriate resistance [need accurate resistor] network, in a resistor network in the partial pressure.
