Draft
International Standard
ISO/DIS 13909-7
Coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing
Reference number
ISO/DIS 13909-7
Edition 3
Projet Norme internationale
Preview
ISO/DIS 13909-7
87042
Indisponible en français
Projet de Norme internationale au stade enquête auprès des membres de l’ISO.
Remplacera ISO 13909-7:2016

ISO/DIS 13909-7

ISO/DIS 13909-7
87042
Langue
Format
CHF 63
Convertir les francs suisses (CHF) dans une autre devise

Résumé

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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