JJF（鄂）64-2020
差阻式读数仪校准规范
Calibration Specification forDifferential Resistor Reading Instrument
2020-12-18 发布
2021-01-01 实施
目 录
引言.........................................1
1 范围...............................................1
2引用文件.....................................................1
3术语......................................................1
4 概述..............................................................1
5 计量特性..................................................2
5.1 电阻比最大允许误差.............................................2
5.2电阻和最大允许误差.......................................2
5.3 芯线电阻对示值的影响........................................2
6 校准条件............................3
6.1 环境条件..........................................3
6.2 测量标准及其他设备............................3
7 校准项目和校准方法.............................................3
7.1校准前准备工作............................................3
7.1.1 外观质量与功能检查.......................................3
7.1.2 标准器的准备工作.........................................3
7.2 电阻比示值误差..............................................3
7.3 电阻和示值误差。....................................5
7.4 芯线电阻对示值的影响........................................6
8 校准结果。..............................6
9 复校时间间隔................................6
附录A电阻比示值误差测量不确定度评定示例（比较法）..................7
附录 B 电阻比示值误差测量不确定度评定示例（直接测量法）...........9
附录C校准证书信息及校准记录参考格式...........................11
附录D电阻比标准装置校准方法.......................................14