SIST ISO 5721-2:2017

Agricultural tractors - Requirements, test procedures and acceptance criteria for the operator's field of vision - Part 2: Field of vision to the side and to the rear

ISO 5721-2:2014 specifies the requirements, test procedures, and acceptance criteria for the field of
vision to the side and the rear of the operator of agricultural tractors.

Tracteurs agricoles - Exigences, modes opératoires d'essai et critères d'acceptation relatifs au champ de visibilité du conducteur - Partie 2: Champ de visibilité latéral et vers l'arrière

ISO 5721-2:2014 spécifie les exigences, les modes opératoires d'essai et les critères d'acceptation relatifs au champ de visibilité latéral et vers l'arrière des conducteurs de tracteurs agricoles.

Kmetijski traktorji - Zahteve, preskusni postopki in merila sprejemljivosti za vidno polje traktorista - 2. del: Vidno polje s strani in od zadaj

Ta del standarda ISO 5721 določa zahteve, preskusne postopke in merila sprejemljivosti za vidno polje ob straneh upravljavca kmetijskih traktorjev in za njim.

General Information

• Status: Published
• Publication Date: 15-Mar-2017
• ICS: 65.060.10 - Agricultural tractors and trailed vehicles
• Technical Committee: IMKG - Machinery for agriculture and forestry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Mar-2017
• Due Date: 15-May-2017
• Completion Date: 16-Mar-2017
• Ref Project: ISO 5721-2:2014 - Agricultural tractors— Requirements, test procedures and acceptance criteria for the operator's field of vision — Part 2: Field of vision to the side and to the rear

Relations

• Replaces: SIST ISO 5721:1995 - Tractors for agriculture -- Operator's field of vision
• Effective Date: 05-Jun-2010

Overview

SIST ISO 5721-2:2017 is an international standard developed by the International Organization for Standardization (ISO) that specifies the requirements, test procedures, and acceptance criteria concerning the operator’s field of vision to the side and rear for agricultural tractors. This standard helps ensure that operators maintain clear visibility around their vehicles, enhancing safety and operational effectiveness when using agricultural machinery in various environments, including fields and roadways.

Key Topics

• Operator’s Field of Vision: The standard defines the minimum field of vision required to the sides and rear of agricultural tractors, either directly or via indirect means such as mirrors.
• Testing Procedures: Test methods are outlined to objectively evaluate compliance with the field of vision requirements, involving specific set-ups and reference points for measurement.
• Acceptance Criteria: Detailed acceptance thresholds are included, such as the maximum allowable obstructions and the necessity for additional indirect vision devices if direct vision is inadequate.
• Indirect View Standards: Acknowledges the equivalency of certain other international standards and regulations for indirect vision, facilitating global consistency.

Applications

SIST ISO 5721-2:2017 applies to manufacturers, designers, testers, and regulatory bodies in the agricultural equipment industry. Its practical value includes:

• Design of Agricultural Tractors: Incorporating compliant visibility features into new tractor designs to ensure operators have clear views to the side and rear. This may include strategic placement and selection of mirrors and other indirect vision devices.
• Product Testing and Certification: Guiding tractor manufacturers through objective testing to verify that vehicles meet the required standards before entering the market. This supports product certification and regulatory approval processes.
• Operational Safety: Offering a standardized framework that helps reduce the risk of accidents caused by blind spots, thereby enhancing safety for both operators and bystanders on farms and public roads.
• Regulatory Compliance: Assisting manufacturers in meeting both national and international safety regulations related to the operator's field of vision in agricultural tractors, particularly for global trade and market access.

Related Standards

For comprehensive understanding and implementation, SIST ISO 5721-2:2017 should be considered alongside other relevant standards:

• ISO 5721-1:2013: Defines requirements for the operator's field of vision to the front of agricultural tractors.
• ISO 5006:2006: Establishes test methods and performance criteria for the operator’s field of view for earth-moving machinery, recognized as an equivalent standard for indirect vision evaluation.
• UNECE Regulation No. 46: Sets uniform provisions concerning the approval and installation of devices for indirect vision, such as mirrors and camera systems, on motor vehicles and their trailers.

Adhering to these standards helps agricultural machinery manufacturers deliver safer, internationally compliant tractors, improving interoperability and trust within the industry. For those responsible for design, production, and safety evaluation, SIST ISO 5721-2:2017 is a vital reference, supporting both practical safety outcomes and regulatory obligations.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2017
Kmetijski traktorji - Zahteve, preskusni postopki in merila sprejemljivosti za vidno
polje traktorista - 2. del: Vidno polje s strani in od zadaj
Agricultural tractors - Requirements, test procedures and acceptance criteria for the
operator's field of vision - Part 2: Field of vision to the side and to the rear
Tracteurs agricoles - Exigences, modes opératoires d'essai et critères d'acceptation
relatifs au champ de visibilité du conducteur - Partie 2: Champ de visibilité latéral et vers
l'arrière
Ta slovenski standard je istoveten z: ISO 5721-2:2014
ICS:
65.060.10 Kmetijski traktorji in prikolice Agricultural tractors and
trailed vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 5721-2
First edition
2014-02-01
Agricultural tractors — Requirements,
test procedures and acceptance
criteria for the operator’s field of
vision —
Part 2:
Field of vision to the side and to the
rear
Tracteurs agricoles — Exigences, modes opératoires d’essai et critères
d’acceptation relatifs au champ de visibilité du conducteur —
Partie 2: Champ de visibilité latéral et vers l’arrière
Reference number
©
ISO 2014
© ISO 2014
All rights reserved. Unless otherwise specified, 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.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General provisions for testing . 1
4.1 General . 1
4.2 Measurement accuracy . 1
4.3 Eye position . 1
5 Requirements, test procedures, and acceptance criteria. 2
5.1 Requirements . 2
5.2 Test procedures . 3
5.3 Acceptance criteria . 4
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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 4, Tractors.
This first edition of ISO 5721-2, together with ISO 5721-1, cancels and replaces the second edition of
ISO 5721 (ISO 5721:1989), which has been technically revised.
ISO 5721 consists of the following parts, under the general title Agricultural tractors — Requirements,
test procedures and acceptance criteria for the operator’s field of vision:
— Part 1: Field of vision to the front
— Part 2: Field of vision to the side and to the rear
iv © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 5721-2:2014(E)
Agricultural tractors — Requirements, test procedures and
acceptance criteria for the operator’s field of vision —
Part 2:
Field of vision to the side and to the rear
1 Scope
This part of ISO 5721 specifies the requirements, test procedures, and accept
...

INTERNATIONAL ISO
STANDARD 5721-2
First edition
2014-02-01
Agricultural tractors — Requirements,
test procedures and acceptance
criteria for the operator’s field of
vision —
Part 2:
Field of vision to the side and to the
rear
Tracteurs agricoles — Exigences, modes opératoires d’essai et critères
d’acceptation relatifs au champ de visibilité du conducteur —
Partie 2: Champ de visibilité latéral et vers l’arrière
Reference number
©
ISO 2014
© ISO 2014
All rights reserved. Unless otherwise specified, 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.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General provisions for testing . 1
4.1 General . 1
4.2 Measurement accuracy . 1
4.3 Eye position . 1
5 Requirements, test procedures, and acceptance criteria. 2
5.1 Requirements . 2
5.2 Test procedures . 3
5.3 Acceptance criteria . 4
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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 4, Tractors.
This first edition of ISO 5721-2, together with ISO 5721-1, cancels and replaces the second edition of
ISO 5721 (ISO 5721:1989), which has been technically revised.
ISO 5721 consists of the following parts, under the general title Agricultural tractors — Requirements,
test procedures and acceptance criteria for the operator’s field of vision:
— Part 1: Field of vision to the front
— Part 2: Field of vision to the side and to the rear
iv © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 5721-2:2014(E)
Agricultural tractors — Requirements, test procedures and
acceptance criteria for the operator’s field of vision —
Part 2:
Field of vision to the side and to the rear
1 Scope
This part of ISO 5721 specifies the requirements, test procedures, and acceptance criteria for the field of
vision to the side and the rear of the operator of agricultural tractors.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5006:2006, Earth-moving machinery — Operator’s field of view — Test method and performance
criteria
ISO 5721-1:2013, Agricultural tractors — Requirements, tes
...

NORME ISO
INTERNATIONALE 5721-2
Première édition
2014-02-01
Tracteurs agricoles — Exigences,
modes opératoires d’essai et critères
d’acceptation relatifs au champ de
visibilité du conducteur —
Partie 2:
Champ de visibilité latéral et vers
l’arrière
Agricultural tractors — Requirements, test procedures and
acceptance criteria for the operator’s field of vision —
Part 2: Field of vision to the side and to the rear
Numéro de référence
©
ISO 2014
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2014
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Publié en Suisse
ii © ISO 2014 – Tous droits réservés

Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Dispositions générales pour les essais . 1
4.1 Généralités . 1
4.2 Précision de mesurage . 1
4.3 Position de l’œil . 1
5 Exigences, modes opératoires d’essai et critères d’acceptation . 2
5.1 Exigences . 2
5.2 Modes opératoires d’essai . 3
5.3 Critères d’acceptation . 4
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (CEI) en ce qui concerne
la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/CEI, Partie 1. Il convient, en particulier de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/CEI, Partie 2 (voir www.
iso.org/directives).
L’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant les
références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de l’élaboration
du document sont indiqués dans l’Introduction et/ou sur la liste ISO des déclarations de brevets reçues
(voir www.iso.org/brevets).
Les éventuelles appellations commerciales utilisées dans le présent document sont données pour
information à l’intention des utilisateurs et ne constituent pas une approbation ou une recommandation.
Pour une explication de la signification des termes et expressions spécifiques de l’ISO liés à l’évaluation
de la conformité, aussi bien que pour des informations au sujet de l’adhésion de l’ISO aux principes de
l’OMC concernant les obstacles techniques au commerce (OTC) voir le lien suivant: Avant-propos —
Informations supplémentaires.
Le comité chargé de l’élaboration du présent document est l’ISO/TC 23, Tracteurs et matériels agricoles et
forestiers, sous-comité SC 4, Tracteurs.
Cette première édition de l’ISO 5721-2, conjointement avec l’ISO 5721-1, annule et remplace la deuxième
édition de l’ISO 5721 (ISO 5721:1989), qui a fait l’objet d’une révision technique.
L’ISO 5721 comprend les parties suivantes, présentées sous le titre général Tracteurs agricoles —
Exigences, modes opératoires d’essai et critères d’acceptation relatifs au champ de visibilité du conducteur:
— Partie 1: Champ de visibilité vers l’avant
— Partie 2: Champ de visibilité latéral et vers l’arrière
iv © ISO 2014 – Tous droits réservés

NORME INTERNATIONALE ISO 5721-2:2014(F)
Tracteurs agricoles — Exigences, modes opératoires
d’essai et critères d’acceptation relatifs au champ de
visibilité du conducteur —
Partie 2:
Champ de visibilité latéral et vers l’arrière
1 Domaine d’application
La présente partie de l’ISO 5721 spécifie les exigences, les modes opératoires d’essai et les critères
d’acceptation relatifs au champ de visibilité latéral et vers l’arrière des conducteurs de tracteurs
agricoles.
2 Références normatives
Les documents suivants, en tout ou partie, sont référencés de manière normative dans le présent
document et sont indispensables à son application. Pour les références datées, seule l’édition citée
s’applique. Pour les références non datées, la dernière édition du document de référence s’applique (y
compris les éventuels amendements).
ISO 5006:2006, Engins de terrassement — Visibilité du conducteur — Méthode d’essai et critères de
performance
ISO 5721-1:2013, Tracteurs agricoles — Exigences, modes opératoires d’essai et critères d’acceptation
relatifs au champ de visibilité du conducteur — Partie 1: Champ de visibilité vers l’avant
UNECE R 46, Prescriptions uniformes relatives à l’homologation
...