ISO 7256-2:1984 PDF

Name: ISO 7256-2:1984 — Sowing equipment — Test methods — Part 2: Seed drills for sowing in lines
SKU: ISO 7256-2:1984
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Sowing equipment — Test methods — Part 2: Seed drills for sowing in lines

Название (английский):

ISO 7256-2:1984

Sowing equipment — Test methods — Part 2: Seed drills for sowing in lines

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 1 апреля 1984 г.
Издание:: ISO IS 7256 edition 1 version 1
ICS:: 65.060.30

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Описание (английский):

Specifies a standardized test method permitting reproducibility of tests when they are carried out in geographically remote areas and/or in different climatic conditions; the main objective being comparability for any one model of equipment. Annex A gives a programm of mandatory tests. Annex B includes optional tests. An example of test report is shown in annex C.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 7256-2:1984 - "Sowing equipment - Test methods - Part 2: Seed drills for sowing in lines" defines a standardized laboratory and field-compatible test method for evaluating seed drills that sow in lines. The primary objective is reproducibility and comparability of performance results for a given model of equipment when tests are performed in geographically remote locations or under different climatic conditions. The standard limits mandatory field testing to preserve reproducibility, provides a program of mandatory tests (Annex A), optional supplementary tests (Annex B), and an example test report format (Annex C).

Key topics and technical requirements

Scope and goal: Produce comparable numerical and graphical performance data that account for seed type, hopper level, application rate settings, forward speed, ground slope and surface irregularities (bumps).

Test categories:

Static tests (machine stationary; drive wheel rotated to simulate forward speed)
Mobile tests (machine driven at constant ground speed over uniform surface)

Mandatory test focus:

Evenness of flow rate (static collection under each feed mechanism)
Accuracy of metering (distribution longitudinally and transversely; mobile adhesive strip or visual/acoustic recording)
Effects of seed level in hopper, flow rate, slope and bumps

Test parameters and procedures:

Seed selection by type (regular, small round, light bearded, irregular) and recording of physical characteristics (germination, bulk density, 1 000-seed mass, moisture, purity)
Typical forward speeds used in tests include 1.50 m/s and 2.50 m/s and the manufacturer’s maximum admissible speed
Flow tests: seeds collected and weighed (example: five 30 s runs)
Metering tests: seeds counted in 100 mm sections on adhesive strips; statistical metrics (mean, standard deviation, coefficient of variation) are calculated for performance assessment

Documentation: Manufacturer instructions and technical specifications must be checked and noted in the test report; Annex C provides an example report format.

Applications and users

Test laboratories and certification bodies seeking reproducible test protocols for seed drills

Manufacturers and R&D teams for product development, quality control and validation of seed metering systems

Procurement and specification authors who need objective performance data for purchasing decisions

Agricultural engineers and researchers analyzing seed distribution, calibration and machine performance

Practical benefits:

Ensures consistent evaluation of seed drills for sowing in lines

Enables comparison between models and across testing locations

Supports troubleshooting of metering, hopper design and field performance effects (slope, bumps)

Related standards

ISO 7256-1 (precision/single seed drills) - related part of the ISO 7256 series

ISO 3339 (classification and terminology for sowing equipment)

ISO 3534 (statistics vocabulary)

ISO 5698, ISO 5699, ISO 7424 (related agricultural equipment and hopper/test dimensions)

Keywords: ISO 7256-2, seed drills test methods, sowing equipment standard, seed drill testing, metering tests, flow rate, agricultural machinery standards.

ISO 7256-2:1984 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 7256-1:1984

Sowing equipment — Test methods — Part 1: Single seed drills (precision drills)

ISO 3339-0:1986

Tractors and machinery for agriculture and forestry — Classification and terminology — Part 0: Classification…

BS ISO 3534-4:2014

Statistics. Vocabulary and symbols. Survey sampling.

ISO 5698:1979

Agricultural machinery — Hoppers — Manual loading height

ISO 5699:1979

Agricultural machines, implements and equipment — Dimensions for mechanical loading with bulk goods

ISO 7424:1982

Agricultural equipment — Matching of wheeled tractors and rear mounted implements — Code numbering system