内容简介
JJF（冀） 177-2020带流量计的气体减压器校准规范
Calibration Specification for Pressure Regulators with Flowmeter
2020-11-30实施
2020-09-01 发布
目 录
引言 .................................................................................................................................... (1 )
1范 围 ................................................................................................... (1)
2引 用 文件 ............................................................................................ (1)
3 概述 ..................................................................................................................................... (1)
4 计量特性 ............................................................................................................................ (1)
4.1 压力表示值误差 .............................................................................................................. (1)
4.2 压力表回程误差 .............................................................................................................. (2)
4.3 压力表轻敲位移 .............................................................................................................. (2)
4.4 压力表指针偏转平稳性 .................................................................................................. (2)
4.5 流量计准确度等级 .......................................................................................................... (2)
4.6 流量计最大允许误差 ...................................................................................................... (2)
4.7 流量计回差 ...................................................................................................................... (2)
4.8 减压器流量计调节范围 .................................................................................................. (2)
4.9 密封性 .............................................................................................................................. (2)
4.10 安全阀 ............................................................................................................................ (2)
5 校准条件 ............................................................................................................................ (2)
5.1 环境条件 ......................................................................................................................... (2)
5.2 校准用设备 ..................................................................................................................... (3)
6 校准项目和校准方法 ........................................................................................................ (3)
6.1 外观 .................................................................................................................................. (3)
6.2 压力表示值误差 .......................................................................................................... (3)
6.3 压力表回程误差 .............................................................................................................. (3)
6.4 压力表轻敲位移 .............................................................................................................. (2)
6.5 压力表指针偏转平稳性 .................................................................................................. (3)
6.6 流量计示值误差 .............................................................................................................. (3)
6.7 流量计回差 ...................................................................................................................... (4)
6.8 减压器流量计调节范围 .................................................................................................. (4)
6.9 减压器密封性 .................................................................................................................. (4)
6.10 安全阀 ............................................................................................................................ (4)
7 校准结果的表达 ................................................................................................................ (4)
8 复校时间间隔 .................................................................................................................... (4)
附录 A 原始记录格式 ........................................................................................................ (5)
附录 B 校准证书内容及内页格式…… ....................................................................... …(6)
附录 C 压力不确定度分析评定示例 ............................................................................ …(7)