JJG 245-2005

0.0.0.0.0. 0.0. o.0.o.o.o.‘ 勺 .。 令 .。 、 Verification Regulation of Illuminance Meter 本规程经国家质量监督检验检疫总局于2005年4月28日批准,并自 2005年10月28日起施行。 归口单位: 全国光学计量技术委员会起草单位: 中国计量科学研究院本规程由全国光学计量技术委员会负责解释 JJG 245- 2005 本规程起草人: 姜晓梅高执中 (中国计量科学研究院) (中国计量科学研究院) 7JG 245- 2005 目录 1 范围·························································································⋯⋯(1) 2 引用文献···················································································⋯⋯ (1) 3 概述··························································································⋯⋯(1) 4 计量性能要求··············································································⋯⋯(1) 4.1 相对示值误差··········································································⋯⋯(1) 4.2 V(劝匹配误差········································································⋯⋯门) 4.3 余弦特性(方向性响应)误差······················································⋯⋯(2) 4.4 非线性误差·············································································⋯⋯(2) 4.5 换挡误差·················································································⋯⋯(2) 4.6 疲劳误差·,·············································································⋯⋯(2) 4.7 红外响应误差·········································································⋯⋯(2) 4.8 紫外响应误差·· ··· ··· ·· ··· ··· ··· ···· ··· ··· ····· ··· ··· ···· ··· ··· ··· ·· ··· · ·· ··· ··· ··· ··· ··⋯⋯(3) 4.9 温度系数·················································································⋯⋯(3) 5 通用技术要求··············································································⋯⋯(3) 5.1 外观·······················································································⋯⋯(3) 5.2 标识··,·················································································⋯⋯(3) 5.3 说明书··················,·······························································⋯⋯(3) 6 计量器具控制············································································⋯⋯(4) 6.1 检定条件·...................·············,·········································⋯⋯(4) 6.2 检定项目···············································································⋯⋯(4) 6.3 检定方法·················································································⋯⋯(4) 6.4 检定结果的处理········································································⋯⋯(7) 6.5 检定周期·················································································⋯⋯(8) 附录A 定型鉴定、样机试验的推荐试验方法·······································⋯⋯(9) 附录B 用比较法检定照度计 ···························································⋯⋯(12) 附录C 不确定度评定实例 ·······························································⋯⋯(13) 附录D 余弦特性误差两个公式之间的关系········································⋯⋯(17) 附录E 照度计检定证书和检定结果通知书内页格式 ,·····························⋯⋯(18) JJG 245- 2005 光照度计检定规程范围本规程适用于光照度计(以下简称照度计)的首次检定、后续检定和使用中检验。 定型鉴定、样机试验中有关计量性能的要求可参照执行。 2 引用文献本规程引用下列文献: 《光照度计》OIML 1988年英文版 《光照度计和光亮度计的性能测试方法》CIE 1987年英文版 HE 1059-1999《测量不确定度评定与表示》 使用本规程时,应注意使用上述引用文献的现行有效版本。 3 概述照度计是测量光照度的计量器具,它由光度头(包括余弦修正器、V(时修正滤光器、光电接收器)和显示器(数字式或指针式)两部分组成。当光电接收器接收到通过余弦修正器和V(劝滤光器的光辐射时,所产生的光电信号,经信号处理,在显示器上显示出相应的光照度值。 4 计量性能要求 4.1 相对示值误差照度计的相对示值误差不得超过表I要求。 表1 相对示值误差要求级别标准一级二级相对示值误差/% 士1.0 士4 士8 4 .2 V(几)匹配误差照度计的V(1)匹配误差不得超过表2要求。 表2 V(z)匹配误差要求一一喂裂一二一 = 一一一- f }一一一斗一一匹配误差/% 3_5 JJG 245- 2005 4.3 余弦特性(方向性响应)误差照度计的余弦特性(方向性响应)误差不得超过表3要求。 表3 余弦特性 (方向性响应) 误差要求级别方向性响应误差/% 标准 2 一级 4 二级 6 4.4 非线性误差照度计的非线性误差不得超过表4要求。 表4 非线性误差要求级别非线性误差/% 标准士0.3 一级士1 二级士2.5 4.5 换挡误差照度计的换挡误差不得超过表5要求。 表5 换挡误差要求级别换挡误差/% 标准士0.2 一级士1 二级士2 4.6 疲劳误差照度计的疲劳误差不得超过表6要求。 表6 疲劳误差要求 4.7 红外响应误差照度计的红外响应误差不得超过表7要求。 JJG 245- 2005 表7 红外响应误差要求级别红外响应误差/% 标准 1 一级 2 二级 4 4.8 紫外响应误差照度计的紫外响应误差不得超过表8要求。 表8 紫外响应误差要求级别紫外响应误差/% 标准 0.5 一级 1.5 二级 2.5 4.9 温度系数照度计的温度系数不得超过表9要求。 表, 温度系数要求级别温度系数/(%/°C) 标准土0.2 一级土0.5 二级士1.0 5 通用技术要求 5.1 外观照度计连接线路应接触良好,光度头的余弦修正器外表面应清洁无损,不许有斑点等痕迹。数字式照度计数字显示应清晰,没有断笔划等现象;指针式照度计应不得有卡针、指针弯曲变形等缺陷。 5.2 标识仪器应有如下标识:名称、型号、产品编号、生产厂及有关强制性标记和说明性标记。 5.3 说明书使用说明书上应包括以下技术指标:仪器尺寸、测量范围、相对示值误差、V(们匹配误差、余弦特性(方向性响应)误差、非线性误差、换挡误差、疲劳误差、红外响应误差、紫外响应误差、温度系数、响应时间。 JJG 245- 2005 6 计量器具控制计量器具控制包括:首次检定、后续检定以及使用中检验。 6.! 检定条件 6.1.1 检定设备 6.1.1.1 光度测童装置由光轨及滑车、灯架、灯丝平面调整仪、光阑等组成。光轨长度要6 n,以上,平直性良好。光轨平直性误差应不超过1 1 mm,测距米尺1 m内的总误差不大于0.2 mm, 6.1.1.2 电源与电测仪表电源:直流稳压电源,输出电压连续可调,(。一120) V/ (0- 10) A, 10 min内输出电压变化应不大于0.02% 电测仪表:数字电压表(或直流电位差计及配套设备),标准电阻。 检定照度计的电测仪表准确度等级不得低于表10要求。 表10 电测仪表准确度等级要求被检照度计级别电测仪表标准 0.01级一级、二级 0.02级 6.1.1.3 发光强度标准灯组检定照度计的发光强度标准灯不得低于表] 11要求。 表11 发光强度标准灯要求被检照度计级别发光强度标准灯标准 2 856 K工作基准灯组一级、二级 2 856 K一级或二级标准灯组 6.1.2 环境条件测光系统所在房问应为暗室,温度应保持在(20士5)0C。电测系统如使用电位差计及标准电池等配套设备,所在房间温度应保持在(20士2) 0C,湿度小于85 % RH. 6.2 检定项目检定项目见表12 定型鉴定、样机试验的试验项目建议包含第4章所有内容。其中,V(对匹配误差、 疲劳误差、红外响应误差、紫外响应误差、温度系数的试验为一法参见附录Ao 6.3 检定方法 6.3.1 外观检查连接光度头、显示器等部件,接通电源,对照5.1用目视观察方法进行外观检查, 发现有不符合4.1所列情况之一时,不出具检