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wxh0734
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樓主  發(fā)表于: 2007-03-13 17:32
準備用FX2N-2AD測壓縮空氣的壓力值，壓力傳感器采用瑞士凱樂(lè )的PA-21SC經(jīng)濟型，規格如下氣壓0-16bar對應電流4-20mA;FX2N-2AD也選擇電流輸入4-20mA對應數字值0-4000
  量程最大變化范圍為16mA
  數字量=(電流輸入-最小模擬量值4mA)×4000/16mA
  每1mA=1bar=對應的數字量=4000/16=250
  當偏置值為0時(shí)，將采集到的數字量除以每1bar的數字量就得到了氣壓值
  我所寫(xiě)的是否有誤,請各位指點(diǎn)一下
lu1112
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1樓  發(fā)表于: 2007-03-20 14:18
請人幫忙還這么牛?

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