铜、铅和锌矿及精矿.质量测量技术的精度和偏差

[中文适用范围]： 本国际标准提供了针对广泛的质量测量技术测试偏差的指南，估计每种技术的精密度，以及在应用其中一种技术估计湿质量时计算精密度的指南。这些指南基于应用统计测试来验证质量测量技术是否存在偏差，估计方差作为精密度的最基本度量，并检查静态称重设备在其工作范围内的线性度。校准方法和符合适用法规的性能测试产生的测试结果，可用于量化每种质量测量技术的精密度和偏差，并验证静态称重设备的线性度。这些指南适用于用于估计矿产品作为货物或发货基础用于运费和保险费用以及初步付款或贸易伙伴最终结算的湿质量的质量测量技术。 [外文原描述]： ISO 12745:2008 provides guidelines to test for bias over a wide range of mass measurement techniques, to estimate the precision for each technique and to calculate the precision for wet mass when estimated by applying one of those techniques. The guidelines are based on the application of statistical tests to verify that a mass measurement technique is unbiased, to estimate the variance as the most basic measure for its precision and to check the linearity of a static scale over its working range. Calibration methods and performance tests for compliance with applicable regulations generate test results that can be used to quantify precision and bias for each of these mass measurement techniques and to verify linearity for static weighing devices. The guidelines apply to mass measurement techniques used to estimate the wet mass for cargoes or shipments of mineral concentrate as the basis for freight and insurance charges and for preliminary payments or for final settlements between trading partners.