热电阻检定规程VIP免费

工业铂、铜热电阻检定规程JJG229-1998钾令本，?r?‘工业铂、铜热电阻检定规程VerificationRegulationofIndustryPlatinumCopperResistanceThermometers扩小十小李加小考一峥.:SJJG229-1998代替.JJG229-1987。人翻人‘人‘叭︺狡r}.令.令，今·令.碍一弓、，小弓，本检定规程经国家质量技术监督局于1998年05月14日批准，并自1998年10月01日起施行。归口单位:上海市技术监督局起草单位:上海市计量测试技术研究院本规程技术条文由起草单位负责解释本规程主要起草人:宋年兰(上海市计量测试技术研究院)参加起草人:茅静康(上海自动化仪表股份有限公司自动化仪表三厂)J听山宝(上海通控仪表有限公司)曹建群(上海高桥仪表厂)吴淑媛(上海工业自动化仪表研究所)目录一概述·.....................................................................................................962二技术要求·...............................................................................................962三检定条件·...............................................................................................963四检定项目和检定方法·................................................................................964五检定结果的计算.......................................................................................965六检定结果处理和检定周期·.........................................................................967附录1检定证书背面格式········································································⋯⋯967附录2工业热电阻检定记录单···，·····························································⋯⋯968附录3工业铂热电阻(Pilo)分度表·········，··············，·······························⋯⋯970附录4工业铂热电阻(Pt100)分度表······················································⋯⋯973附录5工业铜热电阻(Cu50)分度表··························，······························⋯⋯976附录6工业铜热电阻(Cul00)分度表···································，··················⋯⋯976工业铂、铜热电阻检定规程本规程适用于新制造、使用中和修理后的使用温度为一200-+850℃部分或整个范围内的工业热电阻(以下简称热电阻)和感温元件检定一概述适合本规程的铂热电阻的电阻一温度关系如下:对于一200-0℃的温度范围R(t)=R(OC)·[1+At+Bt'+C(t一100'C)t']对于0一850℃的温度范围(I)R(t)=R(0℃)(1+At+Bt')(2)式中:R(t)—在温度为t时铂热电阻的电阻值，n;t-温度，℃;R(OIC)—在温度为0℃时铂热电阻的电阻值，S2;A-常数，其值为3.9083x103Y'’;B—常数，其值为一5.775x10一7r“;C—常数，其值为一4.183x10‘“℃一a适合本规程的铜热电阻的电阻一温度关系如下:对于一50一150℃的温度范围尺(t)二R(0'C)·仁1+at十户(t一l00*c)+Yt,(，一100Y')3(3)式中:a—电阻温度系数，其值为4.280x10一3r月~一常数，其值为一9.31x10一“℃Y—常数，其值为1.23x10”℃二技术要求1热电阻的装配质量和外观应符合下列要求:1.1各部分装配应正确、可靠、无缺件;1.2不得断路、短路;1.3感温元件不得破裂，不得有显著的弯曲现象(不可拆卸的热电阻不作此项检查);1.4保护管应完整无损、不得有凹痕、划痕和显著锈蚀;1.5外表涂层应牢固;1.6热电阻应有铭牌，铭牌应具有以下标志:制造厂名或商标、热电阻型号、分度号、允许偏差等级、适用温度范围、出厂日期及制造计量器具许可证标志2当环境温度为15-35Y;、相对湿度不大于80%时，铂热电阻的感温元件与保护管之间以及多支...