ISO 13909-7:2016

ISO 13909-7:2016

July 2016
International standard Current

Hard coal and coke - Mechanical sampling - Part 7 : methods for determining the precision of sampling, sample preparation and testing

In ISO 13909-7:2016, formulae are developed which link the variables that 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.

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Main informations

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International ISO standards

Publication date

July 2016

Number of pages

43 p.

Reference

ISO 13909-7:2016

ICS Codes

73.040   Coals
75.160.10   Solid fuels

Print number

1
Sumary
Hard coal and coke - Mechanical sampling - Part 7 : methods for determining the precision of sampling, sample preparation and testing

In ISO 13909-7:2016, formulae are developed which link the variables that 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.

Replaced standards (1)
ISO 13909-7:2001
December 2001
International standard Cancelled
Hard coal and coke - Mechanical sampling - Part 7 : methods for determining the precision of sampling, sample preparation and testing

<p>Dans l'ISO 13909-7:2001 sont développées des équations reliant les variables qui contribuent à la fidélité globale de l'échantillonnage. Des méthodes sont décrites pour une estimation de la fidélité globale et le calcul de valeurs pour la variance des prélèvements élémentaires primaires pouvant être utilisées pour modifier la fidélité. Des méthodes de vérification de la variance de la préparation d'échantillons et des essais sont également détaillées.</p>

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