EN ISO 7971-3:2019

SLOVENSKI STANDARD
01-maj-2019
1DGRPHãþD
SIST EN ISO 7971-3:2009
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5XWLQVNDPHWRGD,62
Cereals - Determination of bulk density, called mass per hectolitre - Part 3: Routine
method (ISO 7971-3:2019)
Getreide - Bestimmung der Schüttdichte, sogenannte Masse je Hektoliter - Teil 3:
Routineverfahren (ISO 7971-3:2019)
Céréales - Détermination de la masse volumique, dite masse à l'hectolitre - Partie 3:
Méthode pratique (ISO 7971-3:2019)
Ta slovenski standard je istoveten z: EN ISO 7971-3:2019
ICS:
67.060 äLWDVWURþQLFHLQSURL]YRGLL] Cereals, pulses and derived
QMLK products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 7971-3
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 67.060 Supersedes EN ISO 7971-3:2009
English Version
Cereals - Determination of bulk density, called mass per
hectolitre - Part 3: Routine method (ISO 7971-3:2019)
Céréales - Détermination de la masse volumique, dite Getreide - Bestimmung der Schüttdichte, sogenannte
masse à l'hectolitre - Partie 3: Méthode pratique (ISO Masse je Hektoliter - Teil 3: Routineverfahren (ISO
7971-3:2019) 7971-3:2019)
This European Standard was approved by CEN on 8 February 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7971-3:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 7971-3:2019) has been prepared by Technical Committee ISO/TC 34 "Food
products" in collaboration with Technical Committee CEN/TC 338 “Cereal and cereal products” the
secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2019, and conflicting national standards
shall be withdrawn at the latest by September 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 7971-3:2009.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 7971-3:2019 has been approved by CEN as EN ISO 7971-3:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 7971-3
Second edition
2019-02
Cereals — Determination of bulk
density, called mass per hectolitre —
Part 3:
Routine method
Céréales — Détermination de la masse volumique, dite masse à
l'hectolitre —
Partie 3: Méthode pratique
Reference number
ISO 7971-3:2019(E)
©
ISO 2019
ISO 7971-3:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2019 – All rights reserved

ISO 7971-3:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Procedure. 2
6.1 General . 2
6.2 Hand-operated instruments . 2
6.3 Automatic instruments . 3
6.4 Expression of results . 3
7 Precision . 3
7.1 Interlaboratory trial . 3
7.2 Repeatability . 3
7.3 Reproducibility . 4
7.4 Comparison of two groups of measurements in one laboratory . 4
7.5 Comparison of two groups of measurements in two laboratories . 4
7.6 Uncertainty . 4
8 Test report . 5
Annex A (informative) Description of dimensions and use of KERN . 6
Annex B (informative) Description of dimensions and use of Nilema litre .11
Annex C (informative) Results of interlaboratory tests .14
Bibliography .16
ISO 7971-3:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 4,
Cereals and pulses.
The second edition cancels and replaces the first edition (ISO 7971-3:2009), which has been technically
revised. The main changes compared with the previous edition are as follows:
— a formulae has been introduced to express the results obtained with NILEMA LITRE for wheat
and barley.
A list of all parts in the ISO 7971 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 7971-3:2019(E)
Cereals — Determination of bulk density, called mass per
hectolitre —
Part 3:
Routine method
1 Scope
This document specifies a routine method for the determination of bulk density, called “mass per
hectolitre”, of cereals as grain using manual or automatic, mechanical, electric or electronic mass per
hectolitre measuring instruments.
NOTE Further details of the measuring instruments are specified in ISO 7971-2:2019, 6.4.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 7971-2:2019, Cereals — Determination of bulk density, called mass per hectolitre — Part 2: Method of
traceability for measuring instruments through reference to the international standard instrument
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
mass per hecto
...