ISO 7256-1:1984 PDF

Name: ISO 7256-1:1984 — Sowing equipment — Test methods — Part 1: Single seed drills (precision drills)
SKU: ISO 7256-1:1984
Price: 25 EUR
Availability: InStock

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

Название (английский):

ISO 7256-1:1984

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

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 1 марта 1984 г.
Издание:: ISO IS 7256 edition 1 version 1
ICS:: 65.060.30

Тип поставки:

Full version210 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:3 раб. дн. (перевод)

Цена:210 €

Описание (английский):

Specifies a standardized test method permitting reproducibility of test when they are carried out in geographically remote areas and/or different climatic conditions; the main objective being comparability for any one model equipment. Annex A gives performance of bench tests including six mandatory tests and an optional test. Annex B shows the device for measuring the depth of sowing. Annex C and D include the frequency of tests and a frequency histogram. Optional tests are given in annex E. An example of test report is show in annex F.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 7256-1:1984 - "Sowing equipment - Test methods - Part 1: Single seed drills (precision drills)" defines standardized laboratory and bench test methods for precision (single-seed) sowing units. The standard’s main objective is reproducible, comparable test results for any one model of seed drill when tests are carried out in geographically remote areas and under different climatic conditions. It focuses on metering accuracy, seed placement precision and test reporting rather than full field trials.

Key topics and technical requirements

Scope and purpose: Provides a harmonized method for testing single seed drills (precision drills) to ensure comparability of results between test offices and manufacturers.

Mandatory and optional tests: Annex A lists the performance bench tests - six mandatory tests plus an optional test - covering hopper-level effects, metering speed, slope effects, forward speed influence, seed movement, and seed separation.

Test set‑up:

Tests are carried out on three identical sowing units (three rows or three independent units).
Tests can be static (meter driven while unit is stationary with an adhesive or optical recorder) or mobile (unit mounted on a moving trolley or over a sand bed).
Hopper fill levels are specified (e.g., full, half, one‑eighth) and metering is evaluated at manufacturer’s max/min and intermediate settings.

Seed types and preparation: Defines seed types (small, medium, large, irregular) and requires documentation of seed dimensions, purity and moisture content; seeds must not be treated in a way that alters physical properties.

Measurement and statistics:

Spacing between seeds is measured from geometric centres in millimetres.
Data are grouped and a frequency histogram produced (Annex C/D).
Standardized indices are calculated: quality of feed, miss index, multiples index, standard deviation and coefficient of variation - allowing objective precision and metering performance assessment.

Auxiliary devices and documentation:

Annex B: device for measuring sowing depth.
Annex E: optional tests.
Annex F: example test report and required test report content.

Applications and users

ISO 7256-1 is practical for:

Seed drill manufacturers - to validate metering mechanisms and demonstrate compliance.

Independent test laboratories and test offices - for reproducible evaluation and type approval.

Certification bodies and procurement teams - to compare models objectively during specification and purchase.

R&D and quality assurance teams - to benchmark design changes, optimise metering settings and assess seed handling behavior.

Agricultural engineers and consultants - to interpret machine performance under controlled conditions.

Keywords: ISO 7256-1, sowing equipment, single seed drills, precision drills, test methods, bench tests, metering mechanism, seed spacing, seed drill testing, sowing depth measurement.

ISO 7256-1:1984 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 7424:1982

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

ISO 8689-1:2000

Water quality — Biological classification of rivers — Part 1: Guidance on the interpretation of biological qu…

ISO/ASTM51540-04(2012)

Standard Practice for Use of a Radiochromic Liquid Dosimetry System (Withdrawn 2020)

ISO/ASTM51204-04

Standard Practice for Dosimetry in Gamma Irradiation Facilities for Food Processing (Withdrawn 2013)

ISO/ASTM51431-05

Standard Practice for Dosimetry in Electron Beam and X-Ray (Bremsstrahlung) Irradiation Facilities for Food P…

ISO/ASTM52628-20e1

Standard Practice for Dosimetry in Radiation Processing

ISO/ASTM52921-13(2019)

Standard Terminology for Additive Manufacturing—Coordinate Systems and Test Methodologies

ISO/ASTMTR52917-EB

Additive Manufacturing — Round Robin Testing — General Guidelines