NF EN ISO 7971-2

NF EN ISO 7971-2

March 2019
Standard Current

Cereals - Determination of bulk density, called mass per hectolitre - Part 2 : method of traceability for measuring instruments through reference to the international standard instrument

This document specifies a test method for ensuring the traceability of bulk density, called "mass per hectolitre", measuring instruments through reference to standard measurement instruments. The mass per hectolitre is of commercial importance for grain cereals. Several types of instruments with varying performances exist for measuring it. This document also specifies the performances required of national standards instruments, secondary standards instruments, and measuring instruments used in laboratories or in collection or storage silos.

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Main informations

Collections

National standards and national normative documents

Publication date

March 2019

Number of pages

33 p.

Reference

NF EN ISO 7971-2

ICS Codes

17.060   Measurement of volume, mass, density, viscosity
67.060   Cereals, pulses and derived products

Classification index

V03-719-2

Print number

1

International kinship

ISO 7971-2:2019

European kinship

EN ISO 7971-2:2019
Sumary
Cereals - Determination of bulk density, called mass per hectolitre - Part 2 : method of traceability for measuring instruments through reference to the international standard instrument

This document specifies a test method for ensuring the traceability of bulk density, called "mass per hectolitre", measuring instruments through reference to standard measurement instruments. The mass per hectolitre is of commercial importance for grain cereals. Several types of instruments with varying performances exist for measuring it.

This document also specifies the performances required of national standards instruments, secondary standards instruments, and measuring instruments used in laboratories or in collection or storage silos.

Replaced standards (1)
NF EN ISO 7971-2
October 2009
Standard Cancelled
Cereals - Determination of bulk density, called mass per hectolitre - Part 2 : method of traceability for measuring instruments through reference to the international standard instrument

Le présent document spécifie une méthode d'essai pour assurer le raccordement des instruments de mesure de la masse à l'hectolitre aux étalons. La masse à l'hectolitre ou masse volumique présente un intérêt commercial pour les céréales en grains. Il existe plusieurs types d'instruments aux performances variables pour la mesurer. Ce document spécifie également les performances exigées pour les étalons nationaux et secondaires ainsi que pour les instruments de mesure utilisés dans les laboratoires ou dans les silos de collecte ou de stockage.

Table of contents
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  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Exigences
  • 5 Principe
  • 6 Appareillage
  • 7 Mode opératoire
  • 8 Suivi des performances de l'instrument
  • 9 Rapports d'essai
  • 10 Identification des instruments de mesure raccordés
  • Annexe A (normative) Méthode de calcul des paramètres de performance des étalons et des instruments de mesure
  • Annexe B (informative) Exemples de détenteurs d'instruments de mesure étalons certifiés
  • Bibliographie
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