ICS 91.140.60 CCS N12 中 国 计 量 协 会 团体 标准 T/CMA SB 053―2020 电子水表性能评价与试验技术规范 Specification for the performance evaluation and test of electronic water meter 2020-11-30发布 2021-04-01实施 中国计量协会 发布 CMA 全国团体标准信息平台 全国团体标准信息平台 T/CMA SB 053―2020 I 目 录 前言 ................................ ................................ ............... III 1 范围 ................................ ................................ ............... 1 2 规范性引用文件 ................................ ................................ ..... 1 3 术语和定义 ................................ ................................ ......... 1 4 分类和型号 ................................ ................................ ......... 1 4.1 分类 ................................ ................................ ........... 1 4.2 型号 ................................ ................................ ........... 2 5 计量要求 ................................ ................................ ........... 2 5.1 Q1、Q2、Q3和Q4的值 ................................ .............................. 2 5.2准确度等级和最大允许误差 ................................ ........................ 2 5.3 重复性 ................................ ................................ ......... 2 5.4 水温与水压 ................................ ................................ ..... 2 5.5 管内无水状态 ................................ ................................ ... 2 5.6 零点读数 ................................ ................................ ....... 2 5.7 稳定性 ................................ ................................ ......... 2 5.8 逆流 ................................ ................................ ........... 2 6 技术要求 ................................ ................................ ........... 3 6.1外观 ................................ ................................ ............ 3 6.2材料和结构 ................................ ................................ ...... 3 6.3标记与铭牌 ................................ ................................ ...... 3 6.4指示（显示）装置 ................................ ................................ 3 6.5 防护装置 ................................ ................................ ....... 3 6.6 静压 ................................ ................................ ........... 3 6.7 压力损失 ................................ ................................ ....... 3 6.8 过载水温 ................................ ................................ ....... 3 6.9 静磁场 ................................ ................................ ......... 3 6.10 流速场扰动敏感度等级 ................................ .......................... 3 6.11 外壳防护 ................................ ................................ ...... 3 6.12 影响因子和扰动 ................................ ................................ 3 6.13 电源 ................................ ................................ .......... 3 6.14信号输出 ................................ ................................ ....... 4 7 试验方法 ................................ ................................ ........... 4 7.1 外观检查 ................................ ................................ ....... 4 7.2 静压试验 ................................ ................................ ....... 4 7.3 零点的影响量试验 ................................ ............................... 4 7.4 确定示值误差试验 ................................ ............................... 4 7.5 重复性试验 ................................ ................................ ..... 5 全国团体标准信息平台 T/CMA SB 053―2020 II 7.6 稳定性试验 ................................ ................................ ..... 5 7.7 水温试验 ................................ ................................ ....... 5 7.8 过载水温试验 ................................ ................................ ... 5 7.9 水压试验 ................................ ................................ ....... 5 7.10 逆流试验 ................................ ................................ ...... 5 7.11 压力