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文章介绍了利用DMA-4500数字式自动密度仪测量石油醚的密度的测量方法,分析和评估了对于测量结果有影响的因素,并根据相关标准和规定,对各不确定度分量进行了定量评定,并计算合成标准不确定和扩展不确定度。分析表明,仪器自身的性能对测量结果的不确定度有主要的影响,通过该仪器测量得到的数据能较好地满足相关标准的要求。
This paper introduces the measurement method of measuring the density of petroleum ether using DMA-4500 digital automatic density meter, analyzes and evaluates the factors that affect the measurement results, and quantitatively evaluates the components of uncertainty according to relevant standards and regulations , And calculate the synthetic standard uncertainty and extended uncertainty. Analysis shows that the performance of the instrument itself has a major impact on the uncertainty of the measurement results. The data measured by the instrument can better meet the requirements of relevant standards.