DB4401/T 175-2022 取水计量系统计量特性在线测试方法

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

Onlinemeasurementmethodofmetrologicalcharacteristicsfor

waterdrawingmeteringsystem

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

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.....................................................................................................................................................8

B.2标准超声流量计传感器安装方法.............................................................................................................8

B.3应避开的测量点.........................................................................................................................................8

参考文献...........................................