ISO 5721-1:2013 PDF

Name: ISO 5721-1:2013 — Agricultural tractors — Requirements, test procedures and acceptance criteria for the operator's field of vision — Part 1: Field of vision to the front
SKU: ISO 5721-1:2013
Price: 25 EUR
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Agricultural tractors — Requirements, test procedures and acceptance criteria for the operator's field of vision — Part 1: Field of vision to the front

Название (английский):

ISO 5721-1:2013

Agricultural tractors — Requirements, test procedures and acceptance criteria for the operator's field of vision — Part 1: Field of vision to the front

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 21 июня 2013 г.
Издание:: ISO IS 5721 edition 1 version 1
ICS:: 65.060.10

Тип поставки:

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Язык документа:

ruen

Срок поставки:3 раб. дн. (перевод)

Цена:195 €

Описание (английский):

ISO 5721-1:2013 specifies the requirements, test procedures and acceptance criteria for the field of vision to the front of the operator of agricultural tractors.

Abstract

Overview

Key Topics

Scope and definitions: Establishes terms such as field of vision, semi-circle of vision to the front (12 m radius), reference point and masking effects.
Eye position and reference geometry: Eye position is located 680 mm above and 20 mm in front of the seat index point (per ISO 5353) for all measurements.
Measurement accuracy: Physical measurements must be accurate to within ±2%.
Masking effects and limits:
- Masking effects shall not exceed 700 mm in the main semi-circle of vision.
- Special provisions allow larger masking effects outside the principal sector (up to 1 500 mm under constrained design conditions) with limits on number and spacing.
- Maximum number of masking effects allowed: no more than six in the semi-circle and no more than two inside the defined sector to the front.
- Minimum intervals between masking centres are specified (e.g. 2 200 mm for certain components; acceptance testing references a 2 500 mm chord minimum in some cases).
Visibility testing procedures:
- Uses two point light sources mounted at the reference plane (example: two × 150 W, 12 V filaments, 65 mm apart) on a pivotable support to project silhouettes and determine deepest shadows.
- Additional lateral movement of light sources during testing varies with maximum design speed (≤25 km/h: 170 mm; ≤50 km/h: 100 mm; >50 km/h: 50 mm).
- A mathematical method for calculating masking effects for binocular vision (inter‑ocular distance 65 mm) is provided as an alternative to optical testing.
Windscreen wipers: Wipers must sweep a chord equivalent to at least 8 m on the semi-circle and offer at least one setting of ≥20 cycles/min.
Equivalency: ISO 5006:2006 is acknowledged as an equivalent reference for operator field-of-view criteria.

Applications

Vehicle manufacturers and designers: Integrate visibility requirements into cab, bonnet, exhaust and intake layout to meet regulatory and market safety expectations.
Test laboratories and certification bodies: Use the specified test procedures and acceptance criteria for type approval, inspection and compliance verification.
Safety engineers and fleet managers: Evaluate risk at yard exits, road merges and intersections and implement operational mitigations (mirrors, CCTV, spotters) when design limits cannot be met.
Regulators and standards committees: Reference ISO 5721-1:2013 for national legislation and harmonized tractor safety rules.

Related Standards

ISO 5006:2006 - Earth‑moving machinery - Operator’s field of view (methods considered equivalent).
ISO 5353:1995 - Seat index point (used to determine eye position).

Keywords: ISO 5721-1:2013, agricultural tractors, operator's field of vision, field of vision to the front, masking effects, visibility testing, windscreen wipers, test procedures, acceptance criteria.

Технические детали

Технический комитет: ISO/TC 23/SC 4 - Tractors
SKU: ISO 5721-1:2013

Главная

Каталог

ISO 5006:2006

Отменён

Earth-moving machinery — Operator's field of view — Test method and performance criteria

21 · PDF

123 €

ISO 5353:1995

Действующий

Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index point

Overview ISO 5353:1995 specifies a uniform method and a dedicated device for determining the Seat Index Point (SIP) for seats used in earth-moving machinery, tractors, and agricultural and forestry m…

6 · PDF

25 €

SIST EN ISO 5353:1999