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一、概述1.检定依据JJG678-2007《催化燃烧式甲烷测定器检定规程》。2.环境条件环境温度:15℃~35℃;相对湿度:<85%;气压:100.8kPa。3.测量标准甲烷二级标准气体0.5%CH4、1.5%CH4、3.01%CH4,相对扩展不确定度为U95rel=2%,k=1.96。4.被测对象0~4%CH4催化燃烧式甲烷测定器。5.测量方法按一定的气体流量,通入一定浓度的甲烷标准气体,示值稳定后读取被检仪器的示值,重复测量3次,3次结果的算术平均值与甲烷标准气体实际值的差值,即为催化燃烧式甲烷测定器示值误差。
First, an overview 1. Accreditation based on JJG678-2007 “Catalytic combustion methane analyzer test procedures.” 2. Environmental conditions Ambient temperature: 15 ℃ ~ 35 ℃; Relative humidity: <85%; Pressure: 100.8kPa. 3. Measurement standard Methane grade 2 standard gas 0.5% CH4, 1.5% CH4, 3.01% CH4, the relative expansion uncertainty U95rel = 2%, k = 1.96.4 The measured object 0 ~ 4% CH4 catalytic combustion methane Measuring device. 5. Measurement methods By a certain gas flow, access to a certain concentration of methane gas standard, indicating the value of the instrument was read stable reading, repeated measurements 3 times, 3 times the arithmetic mean of the results and the actual value of methane standard gas Of the difference, that is, catalytic combustion methane analyzer indication error.