数字万用表测量电阻的精度±(1.2%+2字)
数字万用表测量电阻的精度±(1.2%+2字)
数学人气:538 ℃时间:2020-04-18 05:30:13
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以手动档位,3位半数字万用表为例,如测量电阻,用2K欧档位,当测量慢度时,显示为1999欧姆,2字即为最低位变化2,此处即为2欧姆,所以误差为,1999*1.2%+2=±26欧姆,即测量结果介于1973~2025欧姆之间.其他档位原理相同.注意,...
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