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贵州省市场监督管理局发布贵州省地方计量技术规范JJF（黔）33-2019车用尿素溶液加注机校准规范CalibrationSpecificationforDieselExhaustFluidDispenser2019-9-9发布2019-12-9实施JJF(黔)33—2019车用尿素溶液加注机校准规范CalibrationSpecificationforDieselExhaustFluidDispenser归口单位：安顺市质量技术监督检测所主要起草单位：安顺市质量技术监督检测所贵州省计量测试院参加起草单位：河北安蓝环保设备制造有限公司本规范委托安顺市质量技术监督检测所负责解释JJF(黔)33—2019JJF(黔)33—2019本规范主要起草人：王时箭（安顺市质量技术监督检测所）王宁（贵州省计量测试院）赵阳（安顺市质量技术监督检测所）参加起草人：王贵川（安顺市质量技术监督检测所）李祖明（安顺市质量技术监督检测所）张筌贺（河北安蓝环保设备制造有限公司）JJF(黔)33—2019I目录引言······················································································································（II）1范围··················································································································（1）2引用文件··········································································································（1）3术语和计量单位······························································································（1）3.1术语··············································································································（1）3.2计量单位······································································································（1）4概述··················································································································（2）4.1构造··············································································································（2）4.2工作原理······································································································（2）4.3用途··············································································································（2）5计量特性··········································································································（3）5.1加注机的最大允许误差和重复性······························································（3）5.2加注机的付费金额误差··············································································（3）6校准条件··········································································································（3）6.1校准环境条件······························································································（3）6.2主标准器及配套设备··················································································（3）6.3校准介质及温度··························································································（3）7校准项目和校准方法························································································（4）7.1校准项目······································································································（4）7.2校准方法······································································································（4）7.3数据处理······································································································（7）8校准结果表达与处理······················································································（7）8.1校准记录······································································································（7）8.2校准结果的处理··························································································（7）9复校时间间隔··································································································（8）附录A校准记录格式·························································································（9）附录B校准证书内页格式···············································································（12）附录C校准不确定度评定示例·······································································（13）JJF(黔)33—2019II引言本规范依据JJF1521-2015《燃油加油机型式评价大纲》、JJF1071-2010《国家计量校准规范编写规则》、JJF1059.1-2012《测量不确定度评定与表示》、JJF1001-2011《通用计量术语及定义》编制。JJF(黔)33—20191车用尿素溶液加注机校准规范1范围本规范适用于最大流量不超过45L/min的车用尿素溶液加注机（以下简称加注机）的校准。2引用文件本规范引用了下列文件：JJF1094-2002测量仪器特性评定JJF1521-2015燃油加油机型式评价大纲凡是注日期的引用文件，仅注日期的版本适用于该规范；凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本规范。3术语和计量单位3.1术语3.1.1车用尿素溶液dieselexhaustfluid一种应用在柴油车SCR尾气处理系统中，用来减少尾气中氮氧化物排放的液体。车用尿素溶液为无色透明、非易燃易爆液体，对铁、铜、铝等金属有腐蚀性。3.1.2车用尿素溶液加注机dieselexhaustfluiddispenser为安装有SCR尾气处理系统的柴油车加注车用尿素溶液的一种液体体积测量系统。3.1.3最小体积变量minimumspecifiedquantitydeviation指示装置所显示的体积量的最小分辨值。3.1.4最小付费变量minimumspecifiedpricedeviation单价与最小体积变量的乘积。3.2计量单位体积单位：升，符号L；流量单位：升每分钟，符号L/min；JJF(黔)33—20192压力单位：帕[斯卡]，符号Pa；温度单位：摄氏度，符号℃；时间单位：秒，符号s。4概述4.1构造加注机由加注泵、流量测量变换器、编码器、电磁阀、计控主板、指示装置、加注枪等主要部件组成。4.2工作原理加注机在计控主板发出控制信号后，通过泵的加压作用推动存储罐中车用尿素溶液，沿管线先后流经过滤器、流量测量变换器、电磁阀、软管、加注胶管和加注枪，最后注入柴油车上的尿素箱中，并在指示装置上显示加注量、单价和相应金额等。工作原理见图1所示。图1工作原理图4.3用途加注机主要用于为柴油车辆添加车用尿素溶液，计量车用尿素溶液的累积体积流量。指示装置计控主板流量测量变换器电机储液罐车辆尿素箱编码器过滤器加注泵电磁阀加注枪JJF(黔)33—201935计量特性5.1加注机的最大允许误差和重复性加注机最大允许误差为±0.30%，其重复性应不超过0.10%。5.2加注机的付费金额误差加注机显示的付费金额不大于单价和体积示值计算的付费金额，且二者之差的绝对值不超过最小付费变量。6校准条件6.1校准环境条件6.1.1环境温度：（0～40）℃，校准过程中温度变化应不超过5℃，环境温度应在加注机和量器附近测量。6.1.2相对湿度：≤95%。6.2主标准器及配套设备主标准器和配套设备及要求见表1。容量法选用标准金属量器，称重法选用电子秤。表1主标准器和配套设备表序号设备名称技术要求1标准金属量器（以下简称量器）量器的最大允许误差不超过±0.05%，容积不小于加注机的最小体积变量的1000倍，并不小于校准流量下1min的排放量。量器配有水平调节装置，水平调节装置的准确度为0.05mm/m。必要时应有保温措施。2温度计最小分度值不大于0.2℃3秒表分度值不大于0.1s4电子秤中准确度Ⅲ，检定分度数不低于6000，最大秤量不小于校准流量下1min的排放量。5密度计最大允许误差：±0.6个分度值，分度值：0.5kg/m36.3校准介质及温度校准时，应采用合格车用尿素溶液作为校准介质；介质温度与环境温度的最大温差不得超过10℃，如超过10℃，