JJG351-1996工作用廉金属热电偶检定规程

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1、工作用廉金属热电偶检定规程JJG351-1996工作用廉金属热电偶检定规程JJG351-1996VerificationRegulationofWorking代替JIG351-1981BaseMetalThermocouple本检定规程经国家技术监督局于19%年08月23日批准，并自1997年03月01日起施辛Yo归口单位:辽宁省技术监督局起草单位:沈阳合金股份有限公司上海合金厂本规程技术条文由起草单位负责解释本规程主要起草人:邵树成(沈阳合金股份有限公司)王振华(上海合金厂)参加起草人:张家怡(沈阳市计量测试技术研究所)任春岩(沈阳合金股份有限公司)雷宗杰(天津德塔控制系统有限公司)目次一

2、技术要求·...............................................................................................990二检定条件·...............................................................................................991三检定项目和检定方法·................................................................................9

3、91四检定结果处理和检定周期·..........................................................................994附录1热电偶用补偿导线的检定方法························································⋯⋯994附录2带补偿导线热电偶的检定方法·······································，·················⋯⋯994附录3管式炉炉温温场测试方法······································

4、············.............⋯⋯995附录4标准铂锗10一铂热电偶在(0-1300)℃范围内，整百度的热电动势和温度对照表编制方法································································⋯⋯““‘996附录5K,N,E,J型热电偶热电动势允差表············································⋯⋯997附录6S,K,N,E,J型热电偶整百度点，微分热电动势表························⋯⋯999附录7S,K,N,E,JM热电偶分度表·····

5、·············································，⋯⋯999附录S廉金属热电偶检定记录格式······························，············。·.·.········⋯⋯1021附录9检定证书(背面)格式···················································............⋯⋯1022工作用廉金属热电偶检定规程本规程适用于长度不小于750mm的新制造和使用中的分度号为K的镍铬一镍硅热电偶、分度号为N的镍铬硅一镍硅热电偶、分度号为E的镍铬一铜镍热电偶、分度号为J

6、的铁一铜镍热电偶(以下分别简称K,N,E,J型热电偶)在一40-1300℃范围内的检定。一技术要求1热电极的名义成分如表1规定。表I热电。名称{热电极名称{极性{名义成分(%;镍，一，硅、铝)③一%Im斗~,EkAf}4一一-Ni9i907，CdOSO-。一，、一~}F}st-卡I01&#m一卜Ni84N.4i9j5C.6,14S.2i4.4Sil.4。一，。一*imWimm一ffIx&#R州一CNiu9505CNri1405铁一钢，一丽豁-+-黑-斗-CuF55e10N0i45一-注:①不同分度号两镶铬极不可互换;②不同分度号两钢镍极不可互换;③锦铬一镍硅采用镍铬一镶铝分度表。2不同等级热

7、电偶在规定温度范围内，其允差应符合表2规定。3热电偶的外观应满足下列要求:3.1新制热电偶的电极应平直、无裂痕直径应均匀;使用中的热电偶的电极不应有严重的腐蚀和明显缩径等缺陷。3.2热电偶测量端的焊接要牢固、呈球状，表面应光滑、无气孔、无夹渣。衰2热电俩名称分度号等级测量温度范围(℃)允差‘I一40一1100!1.5℃或-0.4%t)镍铬一镍硅(铝)Kn一40-130022.5r或t0.75%tI一40一11