JJG506-1987-直流比较仪式电桥检定规程.pdf

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1、直流比较仪式电桥检定规程JJG506-1987口十小小小小小夺幸令饭直流比较仪式电桥检定规程·寸价户，个朴.吧个JJG506-1987V今人VerificationRegulationofD.C.恤0NnparatorBridge·幸.今·洛·令·今·伞·幸·令今声本检定规程经国家计量局于1987年7月6日批准，并自1988年5月6日起施行。归口单位:中国计量科学研究院起草单位:黑龙江省计量检定侧试所本规程技术条文由起草单位负责解释。本规程主要起草人:王勇黑龙江省计量检定钡试所参加起草人林骥上海电表厂)目录一概述·

2、·························，，···············......................................................⋯566二技术要求·.............................................................................................567三检定条件···················，·····，，·············.............

3、......................................568四检定项目·...............................................................................................568五检定方法................................................................................................569(一)外观与测量功能的

4、检查··············4···，·················，，··················，··⋯⋯569(二)绝缘电阻的测量与耐压试验················································，·，·⋯⋯569(三)磁势平衡系统指标的测量················································，·········⋯⋯570(四)线性度的自检与计算·................................

5、.....................................570(五)检流计系统指标的测量·........................····......................................573(六)整体核验····················，......................................··········，·····，·⋯⋯574六检定结果的处理与检定周期·，·................................

6、....................................574附录····，·······················································，·................················⋯⋯575附录1测量盘线性度自检表格·········，····，，··················，······················，······⋯⋯575附录2测量盘线性度计算实例··，，·············........

7、......................................·一577附录3线性度自检计算公式的推导·.................................................................580直流比较仪式电桥检定规程本规程适用于新制造、使用中和修理后的在直流电流比较仪初、次级磁势平衡和初、次级两电阻上电势平衡的条件下，测量电阻或电阻比的电桥，即直流比较仪式电桥(以下简称比较仪式电桥或电桥)的检定本规程不适用于直流比较仪式测温电桥的检定。一概述比较仪式电桥

8、是在直流电流比较仪磁势平衡时，调节比较仪初级或次级匝数，从而准确调节初级被测电阻和次级标准电阻上电流比达到两电阻上电压平衡，使电阻比等于匝数比，依此进行高精度电阻比较测量的仪器。它和通常的直流电阻电桥一样，都是侧量电阻的比较仪器，但作用原理不同，其不同点是:前者以补偿测量法代替了后者的电桥侧量法，彻底克服了电位引线电阻和端钮接触电阻的影响，便于进行不同标称值