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Status : Active
Standard Type : Main
Document No : ISO 12745:2008
Document Year : 2008
Pages : 47
Edition : 2
Section Volume : Copper, lead, zinc and nickel ores and concentrates (ISO/TC 183.)
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.