JJG576-1988-工作用钨铼热电偶检定规程.pdf

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1、中华人民共和国国家计量检定规程JJG576-1988工作用钨镰热电偶WorkingTungsten-RheniumThermocouple1988一05一31发布1989一04一01实施国家计量局发布JJG576-1988工作用钨徕热电偶检定规程补、。.b0b.。-毛0.VerificationRegulationofWorking心.}JJG576-1988心b.?乙沪︸Tungsten-RheniumThermocouple本检定规程经国家计量局于1988年05月31日批准，并自1989年04月

2、01日起实施。归口单位:辽宁省计量局起草单位:辽宁省计量测试技术研究所本规程技术条文由起草单位负责解释JJc576-1988本规程主要起草人:吕政甫(辽宁省计量测试技术研究所)朱意(辽宁省计量测试技术研究所)吴子俊(辽宁省计量测试技术研究所)参加起草人:马政林(重庆仪表材料研究所)唐锐(重庆仪表材料研究所)张锦霞(北京市计量科学研究所)朱国良(北京高熔金属材料厂)王为(北京高熔金属材料厂)宋宗信(冶金部自动化研究所)祝世超(冶金部钢铁研究总院)宋琳(上海钢铁研究所)JJG576-1988目录一技术要

3、求·......................................................................................(1)二检定条件···，············‘。·····，·····，·········，，，·······，·，·············，，·······一(2)(一)检定用设备······································································

4、·····⋯⋯(2)(二)检定环境和条件···-··················，····‘····，····················，·················，。二(3)三检定项目和检定方法·.......................................................................(3)(一)外观检查··········，····················。····················，··········

5、···············一(3)(二)示值检定·.............................................................................·一(3)四检定结果处理及检定周期·.................................................................(7)附录1与热电偶配合使用的补偿导线的检定··············，························⋯⋯(8

6、)附录2窗口玻璃减弱值A的测定方法··。········，····················，·················一(9)附录3钨锌3一钨徕25热电偶分度表·........................................................(10)附录4钨锌5一钨徕26热电偶分度表····，··········································。···⋯⋯(18)附录5热电偶的热电动势率(塞贝克系数S)及钨徕热电偶热电动

7、势允许范围···········································································⋯⋯(26)附录6工作用钨锌热电偶检定记录表··············...................·······，···⋯⋯(27)附录7检定证书背面格式······································，·········，··············⋯⋯(29)JJG576-1988工作用钨镰热电偶检

8、定规程本规程适用于新制造和使用中的测量范围为(0-2300)℃的工作用钨徕热电偶(以下简称热电偶)的检定。技术要求1钨钵3一钨徕25热电偶的正极名义成分为含钨97%,徕3%，负极名义成分为含钨75%,袜25。分度号为WRe3-WRe250钨徕5一钨徕26热电偶的正极名义成分为含钨95%,锌5%，负极名义成分为含钨74%,徕26。分度号为WRe5-WRe26a2热电偶热电极的名义直径范围应为(0.2-0.5)mm，热电偶的长度一般不小于1500mmo3热电偶热电动势(在