Final Draft
International Standard
ISO/FDIS 13909-7
Coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing
Reference number
ISO/FDIS 13909-7
Edition 3
Projet final Norme internationale
ISO/FDIS 13909-7
87042
Indisponible en français
Projet au stade approbation.
Remplacera ISO 13909-7:2016

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.

Informations générales

  •  : Projet
    : Epreuve envoyée au secrétariat ou mise au vote du FDIS: 8 semaines [50.20]
  •  : 3
  • ISO/TC 27/SC 4
    73.040  75.160.10 
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