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變差=(最大絕對(duì)差值/(上限值-下現(xiàn)值))*100%=0.4%
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允許最大絕對(duì)誤差是△max=(1.6-0)*1.5%=0.024MPa
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設(shè)調(diào)節(jié)閥電流xm,調(diào)節(jié)器輸出最大s=20-4=16mA1
00/16=30/(xm-4)xm=8.8mA
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設(shè)開(kāi)度x%調(diào)節(jié)器輸出最大s=20-4=16mA
100%/S=x%/(12-4)的x%=50%調(diào)節(jié)閥開(kāi)度50%
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實(shí)際熱電勢(shì):E(t,0℃)=E(t,25℃)+E(25,0℃)=14.3mV+1.64mV=15.94mV
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