?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 电气百科:热电偶一些相关知?/title><meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /><meta name="description" content="常用热电偶可分为标准热电偶和非标准热电偶两大类。所谓标准热电偶是指国家标准规定了其热电势与温度的关系、允许误差,并有统一的标准分度表的热电偶,配备有与其对应分度值的显示/记录仪表可供选用。非标准化热?.."><meta name="keywords" content="热电偶|相关知识"> <link href="/style/Template/public.css" rel="stylesheet" type="text/css" /> <link href="/style/Template/tech.css" rel="stylesheet" type="text/css" /> <script src="/Js/jquery-1.6.js" type="text/javascript"></script> <script src="/Js/ArticlePost/HitNum.js" type="text/javascript"></script> <script src="/Js/ArticleComments/ArticleComments.js" type="text/javascript"></script> <script src="/Js/Search/Search.js" type="text/javascript"></script> <script src="/Js/Public.js" type="text/javascript"></script> <script src="/Js/Advertisement/GetAdvertisement.js" type="text/javascript"></script> <script src="/Js/ComZF.js" 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class="brand_news_con"><p style="text-indent:2em;"> 常用热电偶可分为标准热电偶和非标准热电偶两大类。所谓标准热电偶是指国家标准规定了其热电势与温度的关系、允许误差,并有统一的标准分度表的热电偶,配备有与其对应分度值的显示/记录仪表可供选用。非标准化热电偶在使用范围或数量级上均不及标准化热电偶,一殷也没有统一的分度表,主要用于某些特殊场合的测量?</p> <p style="text-indent:2em;"> 我国?988??日起,热电偶和热电阻全部按IEC国际标准生产,并指定S、B、E、K、R、J、T七种标准化热电偶为我国统一设计型热电偶?</p> <p style="text-indent:2em;"> 我国标准化热电偶的新旧分度号的对比是什么? </p> <p style="text-indent:2em;"> 答:为了与IEC标准一致,我国已按IEC推荐标准陆续制定和发布了新的热电偶的分度号和分度表国家标准,将镍铬一镍硅热电偶由EU2改为K;铂铑30-铂铑6热电偶由LL-2改为B;铂铑10铂热电偶由LB-3改为S,并颁布了新的分度表?</p> <p style="text-indent:2em;"> 热电偶分度的定义是什么? </p> <p style="text-indent:2em;"> 答:分度号是用来反映温度传感器在测量温度范围内温度变化对应传感器电压或者阻值变化的标准数列,即热电阻、热电偶、电阻、电势对应的温度值?</p> <p style="text-indent:2em;"> 热电偶测温的优点是什么? </p> <p style="text-indent:2em;"> (l)测温准确度较高?</p> <p style="text-indent:2em;"> (2)结构简单,便于维修?</p> <p style="text-indent:2em;"> (3)动态响应速度快?</p> <p style="text-indent:2em;"> (4)测温范围较宽?</p> <p style="text-indent:2em;"> (5)信号可远传,便于集中检测和自动控制?</p> <p style="text-indent:2em;"> (6)可测量局部温度甚至“点”温度?</p> <p 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