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智能壓力變送器的絕對誤差與精度等級的關系

智能壓力變送器的精度等級基本上達到0.2級也就是0.2%的精度,那么當在這種精度等級下壓力變送器的絕對誤差是多少呢?首先我們來看下,什么是絕對誤差?
  
  智能壓力變送器不同的輸出信號來計算不同的允許誤差:
  
  1、輸出4-20mA的信號的變送器其壓力的變化和4-20mA信號變化是線性比例關系。
  
  只有16mA的數值變化,所以0.016mA的誤差就是0.1%的誤差。
  
  2、輸出0-10VDC的信號的壓力變送器其壓力的變化和0-10VDC信號變化是線性比例關系。只有10VDCA的數值變化,所以0.010V的誤差就是0.1%的誤差。
  
  3、輸出1-5VDC的信號的變送器其壓力的變化和1-5VDC信號變化是線性比例關系。只有4VDCA的數值變化,所以0.004V的誤差就是0.1%的誤差。
 

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