BS ISO 13909-7-2002 硬煤和焦炭.机械取样.取样精度、样品制备和试验的测定方法

标准号：BS ISO 13909-7-2002
中文标准名称：硬煤和焦炭.机械取样.取样精度、样品制备和试验的测定方法
英文标准名称：Hard coal and coke - Mechanical sampling - Methods for determining the precision of sampling, sample preparation and testing
标准类型：D20
发布日期：2002/1/23 12:00:00
实施日期：2002/1/23 12:00:00
中国标准分类号：D20
国际标准分类号：73.040;75.160.10
适用范围：In this part of ISO 13909, equations are developed which link the variables which contribute to overall sampling precision. Methods are described for estimating overall precision and for deriving values for primary increment variance which can be used to modify the sampling scheme to change the precision. Methods for checking the variance of sample preparation and testing are also described.