EN ISO 7971-2:2009

Cereals - Determination of bulk density, called mass per hectolitre - Part 2: Method of traceability for measuring instruments through reference to the international standard instrument (ISO 7971-2:2009)

ISO 7971-2:2009 specifies a test method for ensuring the traceability of mass per hectolitre measuring instruments through reference to standard measurement instruments. The mass per hectolitre or bulk density is of commercial importance for grain cereals. Several types of instruments with varying performances exist for measuring it.
ISO 7971-2:2009 also specifies the performances required of national standards instruments, secondary standards instruments, and measuring instruments used in laboratories or in collection or storage silos.

Getreide - Bestimmung der Schüttdichte, sogenannte Masse je Hektoliter - Teil 2: Verfahren zur Rückverfolgbarkeit von Messgeräten mittels Referenz auf internationale Normalgeräte (ISO 7971-2:2009)

Dieser Teil von ISO 7971 legt ein Prüfverfahren zur Sicherstellung der Rückverfolgbarkeit der für die Messung
der Masse je Hektoliter angewendeten Geräte durch Bezugnahme auf ein internationales Normalgerät fest.
Die Masse je Hektoliter oder die Schüttdichte ist bei Getreidekorn von enormer wirtschaftlicher Bedeutung.
Zur Messung dieser Eigenschaft stehen verschiedene Messgeräte mit unterschiedlichem Leistungsverhalten
zur Verfügung.
Dieser Teil von ISO 7971 legt auch die Leistungsanforderungen fest, die die nationalen Normalgeräte, die
sekundären Normalgeräte, und die in Laboratorien oder in Annahme- oder Lagersilos verwendeten Messgeräte
erfüllen müssen.

Céréales - Détermination de la masse volumique, dite masse à l'hectolitre - Partie 2: Méthode de raccordement des instruments de mesure à l'étalon international (ISO 7971-2:2009)

L'ISO 7971-2:2009 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.
L'ISO 7971-2:2009 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.

Žito - Določanje prostorninske mase, imenovane hektolitrska masa - 2. del: Metoda sledljivosti za merilne instrumente glede na referenčni mednarodni etalonski instrument (ISO 7971-2:2009)

Ta del ISO 7971 opredeljuje preskusno metodo za zagotavljanje sledljivosti za merilne instrumente hektolitrske mase ob sklicevanju na standardne merilne instrumente. Hektolitrska masa oziroma gostota razsutega tovora je gospodarskega pomena za zrnata žita. Obstaja več vrst instrumentov z različnimi zmogljivostmi za njeno merjenje. Ta del ISO 7971 prav tako opredeljuje zmogljivosti, ki se zahtevajo za državne standardne instrumente, sekundarne standardne instrumente in merilne instrumente, uporabljene v laboratorijih ali v zbirkah ali skladiščnih silosih.

General Information

• Status: Withdrawn
• Publication Date: 14-Aug-2009
• Withdrawal Date: 05-Mar-2019
• ICS: 67.060 - Cereals, pulses and derived products
• Technical Committee: CEN/TC 338 - Cereal and cereal products
• Drafting Committee: CEN/TC 338/WG 7 - Mass per hectolitre
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 06-Mar-2019
• Ref Project: SIST EN ISO 7971-2:2010 - Cereals - Determination of bulk density, called mass per hectolitre - Part 2: Method of traceability for measuring instruments through reference to the international standard instrument (ISO 7971-2:2009)

Relations

• Replaced By: EN 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 (ISO/FDIS 7971-2:2018)
• Effective Date: 05-Nov-2014

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2010
äLWR'RORþDQMHSURVWRUQLQVNHPDVHLPHQRYDQHKHNWROLWUVNDPDVDGHO0HWRGD
VOHGOMLYRVWL]DPHULOQHLQVWUXPHQWHJOHGHQDUHIHUHQþQLPHGQDURGQLHWDORQVNL
LQVWUXPHQW,62
Cereals - Determination of bulk density, called mass per hectolitre - Part 2: Method of
traceability for measuring instruments through reference to the international standard
instrument (ISO 7971-2:2009)
Getreide - Bestimmung der Schüttdichte, sogenannte Masse je Hektoliter - Teil 2:
Verfahren zur Rückverfolgbarkeit von Messgeräten mittels Referenz auf internationale
Normalgeräte (ISO 7971-2:2009)
Céréales - Détermination de la masse volumique, dite masse à l'hectolitre - Partie 2:
Méthode de raccordement des instruments de mesure à l'étalon international (ISO 7971-
2:2009)
Ta slovenski standard je istoveten z: EN ISO 7971-2:2009
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.

EUROPEAN STANDARD
EN ISO 7971-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2009
ICS 67.060
English Version
Cereals - Determination of bulk density, called mass per
hectolitre - Part 2: Method of traceability for measuring
instruments through reference to the international standard
instrument (ISO 7971-2:2009)
Céréales - Détermination de la masse volumique, dite Getreide - Bestimmung der Schüttdichte, sogenannte
masse à l'hectolitre - Partie 2: Méthode de raccordement
Masse je Hektoliter - Teil 2: Verfahren zur
des instruments de mesure à l'étalon international (ISO Rückverfolgbarkeit von Messgeräten mittels Referenz auf
7971-2:2009) internationale Normalgeräte (ISO 7971-2:2009)
This European Standard was approved by CEN on 8 August 2009.

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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7971-2:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 7971-2:2009) has been prepared by Technical Committee CEN/TC 338 “Cereal and
cereal products”, the secretariat of which is held by AFNOR, in collaboration with Technical Committee
ISO/TC 34 "Food products".
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 February 2010, and conflicting national standards shall be withdrawn
at the latest by February 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
INTERNATIONAL ISO
STANDARD 7971-2
Second edition
2009-08-15
Cereals — Determination of bulk density,
called mass per hectolitre —
Part 2:
Method of traceability for measuring
instruments through reference
to the international standard instrument
Céréales — Détermination de la masse volumique, dite masse
à l'hectolitre —
Partie 2: Méthode de raccordement des instruments de mesure
à l'étalon international
Reference number
ISO 7971-2:2009(E)
©
ISO 2009
ISO 7971-2:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 7971-2:2009(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Requirements . 2
4.1 Certified international or national standard instrument . 2
4.2 National standard instrument. 2
4.3 Secondary or internal standard instrument.2
4.4 Routine measuring instrument. 2
5 Principle. 3
6 Apparatus . 3
7 Procedure . 4
7.1 Traceability of national standard instruments through reference to the certified
international or national standard instrument.4
7.2 Traceability of the secondary standard instruments through reference to the national
standard instrument . 6
7.3 Verification of instruments in operation. 7
8 Monitoring of instrument performance . 9
9 Test reports . 9
9.1 Analysis certificate . 9
9.2 Conformity certificate. 10
10 Identification of traced measuring instruments . 10
Annex A (normative) Method for calculation of performance parameters of standard instruments
and of measurement instruments. 11
Annex B (informative) Some owners of certified standard measurement instruments. 18
Bibliography . 19

ISO 7971-2:2009(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 7971 (all parts) was prepared by the European Committee for Standardization (CEN) Technical
Committee CEN/TC 338, Cereal and cereal products, in collaboration with Technical Committee ISO/TC 34,
Food products, Subcommittee SC 4, Cereals and pulses, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This edition is the second to bear the number ISO 7971-2, but the technical content is new. ISO 7971-3:2009
cancels and replaces the first edition (ISO 7971-2:1995).
ISO 7971 consists of the following parts, under the general title Cereals — Determination of bulk density,
called mass per hectolitre:
⎯ Part 1: Reference method
⎯ Part 2: Method of traceability for measuring instruments through reference to the international standard
instrument
⎯ Part 3: Routine method
iv © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 7971-2:2009(E)

Cereals — Determination of bulk density, called mass
per hectolitre —
Part 2:
Method of traceability for measuring instruments through
reference to the international standard instrument
1 Scope
This part of ISO 7971 specifies a test method for ensuring the traceability of mass per hectolitre measuring
instruments through reference to standard measurement instruments. The mass per hectolitre or bulk density
is of commercial importance for grain cereals. Several types of instruments with varying performances exist
for measuring it.
This part of ISO 7971 also specifies the performances required of national standards instruments, secondary
standards instruments, and measuring instruments used in laboratories or in collection or storage silos.
2 Normative references
The following referenced documents are indispensable for the application 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 712, Cereals and cereal products — Determination of moisture content — Reference method
ISO 7971-1, Cereals — Determination of bulk density, called “mass per hectolitre” — Part 1: Reference
method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
bulk density
“mass per hectolitre”
〈cereals〉 ratio of the mass of a cereal to the volume it occupies after being poured into a container under well-
defined conditions
NOTE Bulk density is expressed in kilograms per hectolitre of g
...