ICS17.120.01 CCSN12 4401 广 州 市 地 方 标 准 DB44001/T175—2022 取水计量系统计量特性在线测试方法 Online measurement method ofmetrological characteristics for water drawing metering system 2022-10-14发布 2022-11-15实施 广州市市场监督管理局 发布 DB44001/T175—2022 I目次 前 言............................................................................................................................................................II 1范围.....................................................................................................................................................................1 2规范性引用文件................................................................................................................................................1 3术语和定义........................................................................................................................................................1 4通用技术要求....................................................................................................................................................2 4.1随机文件及外观.........................................................................................................................................2 4.2密封性.........................................................................................................................................................2 4.3示值显示.....................................................................................................................................................2 5计量特性要求....................................................................................................................................................2 5.1最大允许误差.............................................................................................................................................2 5.2重复性.........................................................................................................................................................2 6测试项目和测试条件........................................................................................................................................2 6.1测试项目.....................................................................................................................................................3 6.2测试条件.....................................................................................................................................................3 7测试方法............................................................................................................................................................3 7.1随机文件及外观检查.................................................................................................................................3 7.2密封性检查.................................................................................................................................................3 7.3示值误差及重复性.....................................................................................................................................3 7.4测试结果的处理.........................................................................................................................................6 7.5测试周期.....................................................................................................................................................6 附录A（规范性）计量系统中流量计配套要求..................................................................................7 A.1计量要求.....................................................................................................................................................7 A.2流量计配套要求.........................................................................................................................................7 附录B（资料性）计量系统在线测试前准备......................................................................................8 B.1管道测量.................................................................................................................................