ICS 91.140.60 N12 中 国 计 量 协 会 团 体 标 准 T/CMA SB 055―2020 灌溉水表 Irrigation 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 055―2020 I 目 录 前言 ................................ ................................ ............... III 灌溉水表 ................................ ................................ ............. 1 1 范围 ................................ ................................ ............... 1 2 规范性引用文件 ................................ ................................ ..... 1 3 术语和定义 ................................ ................................ ......... 1 3.1 灌溉水表 irrigation water meter ................................ ............... 1 4 分类 ................................ ................................ ............... 1 4.1 按测量传感器分类 ................................ ............................... 1 4.2 按耐固体颗粒耐久性试验结果分类 ................................ ................. 1 4.3 按适用的气候和机械环境分类 ................................ ..................... 1 4.4 按适用的电磁环境分类 ................................ ........................... 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 相对示值误差 ................................ ................................ ... 3 5.4 重复性 ................................ ................................ ......... 3 5.5 逆流 ................................ ................................ ........... 3 5.6 水温 ................................ ................................ ........... 3 5.7 水压 ................................ ................................ ........... 3 5.8 无流量或无水 ................................ ................................ ... 3 5.9 静磁场 ................................ ................................ ......... 3 5.10 耐久性 ................................ ................................ ........ 4 6 技术要求 ................................ ................................ ........... 4 6.1 额定工作条件 ................................ ................................ ... 4 6.2 材料和结构 ................................ ................................ ..... 5 6.3 指示装置 ................................ ................................ ....... 5 6.4 防护装置 ................................ ................................ ....... 5 6.5 标记与铭牌 ................................ ................................ ..... 5 6.6 流体扰动 ................................ ................................ ....... 6 6.7 静压 ................................ ................................ ........... 6 6.8 压力损失 ................................ ................................ ....... 7 6.9 带电子装置的灌溉水表 ................................ ........................... 7 7 试验方法 ................................ ................................ ........... 9 7.1 试验条件 ................................ ................................ ....... 9 7.2 外观检查 ................................ ................................ ...... 10 7.3 电子装置功能检查 ................................ .............................. 10 7.4 静压试验 ................................ ................................ ...... 10 全国团体标准信息平台 T/CMA SB 055-2020 II 7.5 确定示值误差试验 ................................ .............................. 10 7.6 逆流试验 ................................ ................................ ...... 10 7.7 水温试验 ................................ ................................ ...... 11 7.8 水压试验 ................................ ................................ ...... 11 7.9 无流量或无水试验 ................................ .............................. 11 7.10 静磁场试验 ................................ ................................ ... 11 7.11 耐久性试验