DIN ISO 9276-2-2018 粒度分析结果的表示.第2部分:平均粒度/直径和粒度分布的力矩的计算(ISO 9276-2-2014)

标准号：DIN ISO 9276-2-2018
中文标准名称：粒度分析结果的表示.第2部分:平均粒度/直径和粒度分布的力矩的计算(ISO 9276-2-2014)
英文标准名称：Representation of results of particle size analysis - Part 2: Calculation of average particle sizes/diameters and moments from particle size distributions (ISO 9276-2:2014)
标准类型：A42;A28
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：A42;A28
国际标准分类号：19.120
引用标准：DIN ISO 565-1998;DIN ISO 3534-1-2009;DIN ISO 9276-1-2004;ISO 565-1990;ISO 3534-1-2006;ISO 9276-1-1998;ISO 9276-3-2008;ISO 9276-5-2005
适用范围：This part of ISO 9276 provides relevant equations and coherent nomenclatures for the calculation of moments, mean particle sizes and standard deviations from a given particle size distribution. Two notation systems in common use are described. One is the method of moments while the second describes the moment-ratio method. The size distribution may be available as a histogram or as an analytical function. The equivalent diameter of a particle of any shape is taken as the size of that particle. Particle shape factors are not taken into account. It is essential that the measurement technique is stated in the report in view of the dependency of sizing results of measurement principle. Samples of particles measured are intended to be representative of the population of particles. For both notation systems, numerical examples of the calculation of mean particle sizes and standard deviation from histogram data are presented in an annex. The accuracy of the mean particle size may be reduced if an incomplete distribution is evaluated. The accuracy may also be reduced when very limited numbers of size classes are employed.