JJG75-1995标准铂铑10--铂热电偶.pdf

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1、中华人民共和国国家计量检定规程JJG75-1995标准铂佬10一铂热电偶StandardPlatinum-10%Rhodium/PlatinumThermocouple1995一07一05发布1995一12一01实施国家技术监督局发布JJG75-1995标准铂佬10一铂热电偶检定规程‘，.‘，.‘，.‘，.‘，.‘，.‘，.‘，.‘，.‘，.‘，.‘，.‘，.‘，.马.扒切.扒︺.朽︺.卜JJG75-1995，.VerificationRegulationoftheStandard{叭︺.代替JJG75-1982洒︺.叭︺.Platinum-10%Rhodium/Plati

2、num}八︺.口Thermocouple本检定规程经国家技术监督局于1995年07月05日批准，并自1995年12月01日起施行。归口单位:中国计量科学研究院起草单位:中国计量科学研究院本规程技术条文由起草单位负责解释.IJG75-1995本规程主要起草人:郑芳(中国计量科学研究院)JIG75-1995目录一概述·······················································································⋯⋯(1)二技术要求····································

3、···············································一(1)三检定仪器、设备和条件·....................................................................(2)四检定方法···················································································一(2)五检定结果的处理和检定周期·..................................................

4、............(5)附录1(300一1100)`C温区内标准热电偶热电动势E(t)和温度t之间关系的计算方法·························································。·········一(7)附录2铂锗10一铂热电偶(S型)参考函数〔E,(t)〕表···························⋯⋯(8)附录3检定记录和检定证书背面格式················································⋯⋯(15)1.双极比较法检定记录···················

5、······································⋯⋯(15)2.同名极比较法检定记录················。·····································⋯⋯(16)3.标准热电偶检定结果整理表················································⋯⋯(17)4.标准铂锗10一铂热电偶检定证书背面格式······························。··⋯(18)J.1G75-1995标准铂佬10一铂热电偶检定规程本规程适用于新制造和使用中的1等、2等标准

6、铂锗10一铂热电偶的检定。概述1,2等标准铂铭10一铂热电偶是热电偶系列中准确度较高，物理、化学性能良好，在高温下有很好的抗氧化性能，热电动势的稳定性和复现性很好的热电偶。因此，它作为标准计量器具，在(419.527--1084.62)`-温区用于温度量值传递，也用于该温区内精密测温。二技术要求11,2等标准铂姥10-铂热电偶(以下简称标准热电偶)，它的正极(SP)为含铭10%的铂铭合金，负极(SN)为纯铂。2新制标准热电偶的电极直径为0.5-0.015mm，长度不小于1000mm，使用中的标准热电偶的电极长度不小于900mm.3新制标准热电偶，电极的线径应均匀，表面平滑、

7、光洁、测量端的焊接点圆滑、端正、光亮、直径为(1.1-1.3)mm的球状，使用中的标准热电偶，允许电极稍有弯曲，表面略有暗色，但电极上不允许有焊点、裂痕及明显缩径。4标准热电偶测量端温度在铜点(1084.62℃)、铝点(660.323℃)或锑点(630.63℃)及锌点(419.527℃)，参考端温度为0℃时，其热电动势应满足如下要求:E(tcu)=(10.575士0.015)mVE(t,=)二5.860+0.37(E(tc=)一10.575〕士0.005mVE(tsb)二5.553+0.37(E(tc=)一10.5