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  • BSI
    BS ISO 12745:2008 Copper, lead and zinc ores and concentrates. Precision and bias of mass measurement techniques
    Edition: 2008
    $497.46
    / user per year

Description of BS ISO 12745:2008 2008

This International Standard 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.

The application of static scales requires that at least one certified weight with a mass of no less than one (1) tonne be either available on location or brought in for calibration purposes, and that this certified weight be applicable to the scale in accordance with the manufacturer’s recommendations. A set of certified weights covering the entire working range of a weighing device simplifies the process of verifying its state of calibration, estimating its precision as a function of applied load and testing its linearity over the working range.



Standard NumberBS ISO 12745:2008
TitleCopper, lead and zinc ores and concentrates. Precision and bias of mass measurement techniques
StatusConfirmed
Publication Date2008-11-30
Identical National Standard OfISO 12745:2008
DescriptorsLead ores, Mass, Weight (mass), Metalliferous minerals, Concentrates, Precision, Zinc ores, Measurement characteristics, Bias, Weighing machines, Statistical methods of analysis, Copper ores, Weight measurement
ICS73.060.99 Other metalliferous minerals
CommitteeW/-
ISBN978 0 580 63619 6
PublisherBSI
Pages56

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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