JJG505-1987直流比较仪式电位差计检定规程.pdf

《JJG505-1987直流比较仪式电位差计检定规程.pdf》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、直流比较仪式电位差计检定规程JJG505-1987找江小小幸幸小}"=}-"-f:."4".直流比较仪式电位差计二.v吞检定规程李JJG505-19871丫，'}.".".".".".".".}.".VerificationRegulationofD.C.ComparatorPotentiometer本检定规程经国家计量局于1987年6月6日批准，并自1988年4月6日起施行。归口单位:中国计量科学研究院起草单位:黑龙江省计量检定测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9(黑龙江省计量检定测试所)目录一概述········

2、···············，，······················，·，········，········.................··········⋯⋯544二技术要求·...............................................................................................545三检定条件·.........................................................................

3、......................546四检定项目·...............................................................................................546五检定方法·...............................................................................................547(一)外观与侧量功能的检查，···························

4、···，·····，，，····，，，······，，······，·······⋯⋯547(二)绝缘电阻的测量与耐压试验......................··········································，·⋯，548(三)初、次级工作电流调节指标与示值变化引起工作电流变化的测量，·····，············⋯⋯548(四)初级回路对外最大输出电压与补偿电动势中纹波电压的测量······4····，，····，，，·····，·⋯⋯549(五》磁势平衡系统与检流计系统指标的侧量......

5、.............................................·一549(六)补偿电动势漂移与低频噪声的测量···········，，······，·.........................................550〔七)侧量盘线性度的自检与计算····················，······，··········，·······，···············⋯⋯550(八)整休核验······················..............................

6、........................................553六检定结果的处理与检定周期·.......................................................................553附录1线性度自检表格·······················································，················⋯⋯554附录2线性度自检计算公式的推导··············，，·························

7、···················⋯⋯556附录3线性度计算实例·····················，.............................................······一558543直流比较仪式电位差计检定规程本规程适用于新生产、使用中和修理后的磁势自动平衡的直流比较式电位差计(以下简称比较仪式电位差计或电位差计)的检定一概述比较仪式电位差计是通过改变自动平衡直流电流比较仪中测量绕组的匝数来调节并确定恒定测量电阻上的直流电流，从而获得连续可变的补偿电压的定阻变流式电位差计。其原理线路如图1。工作原

8、理是:初级可变的测量绕组与次级有微调的固定绕组各自流过恒定直流电流与可变直流电流，它们在铁芯上产生方向相反的磁势，伺服派其磁势差由检测绕组检出，并通过有差闭ABc环