ISO 4112:1990 PDF

Name: ISO 4112:1990 — Cereals and pulses — Guidance on measurement of the temperature of grain stored in bulk
SKU: ISO 4112:1990
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Cereals and pulses — Guidance on measurement of the temperature of grain stored in bulk

Название (английский):

ISO 4112:1990

Cereals and pulses — Guidance on measurement of the temperature of grain stored in bulk

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 3
Дата публикации:: 29 ноября 1990 г.
Издание:: ISO IS 4112 edition 2 version 1
ICS:: 67.060

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Описание (английский):

The principle is based on placing a series of thermometric probes consisting of a rigid tube or flexible cable with one or more temperature-sensing devices throughout the mass of stored grain to detect or monitor changes in temperature. In larger stores, an automated temperature control may be used, the various measuring values being printed on paper. This second edition cancels and replaces the first edition ISO 4112:1979, of which the scope has been expanded to include all bulk stores.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 4112:1990 provides comprehensive guidance on the measurement of the temperature of cereals and pulses stored in bulk. This international standard, developed by ISO/TC 34 (Food Products), establishes principles and methods for monitoring temperature within large-scale grain storage facilities such as silos and other bulk storage installations. The standard emphasizes the critical role of temperature measurement in preventing grain spoilage due to physiological heat generation during storage. Accurate temperature control is vital to maintaining the commercial, technological, and nutritional quality of stored cereals and pulses.

Key Topics

Purpose and Scope ISO 4112:1990 replaces the 1979 edition, extending its application to all bulk grain storage facilities. It presents standardized methods to detect temperature rises that may signal grain degradation or infestation. The standard covers principles of temperature measurement, suitable equipment, installation guidelines, and operational procedures in bulk grain storage.

Thermometric Probes The core principle involves placing thermometric probes-either rigid tubes or flexible cables fitted with temperature sensors-throughout the grain mass. These probes should be resistant to fumigation chemicals and rodent damage. For deep or vertical silos, probe design must accommodate high tensile forces typical of filling and emptying operations.

Temperature Sensors Sensors may include thermistors, thermocouples, or resistance thermometers, capable of measuring from approximately 0.5 °C up to 70 °C. Fast response times are essential, with a maximum of 3 minutes to reach a stable reading after insertion.

Measurement Frequency Frequent and regular temperature readings (e.g., every 24 hours) are recommended under unfavorable storage conditions such as high moisture or temperature. Under cooler, drier conditions, measurements can be less frequent, such as weekly. The spatial arrangement of sensors should ensure no point in the grain mass is more than 3 meters from a probe, to promptly detect localized hot spots.

Data Recording and Monitoring Temperature measurement systems may range from portable handheld devices for small storages to fixed or semi-fixed automated installations with continuous electronic monitoring. Advanced installations may incorporate automated data logging and alarm systems to alert operators to temperature anomalies requiring intervention.

Applications

Grain Quality Assurance Monitoring grain temperature during storage helps detect early signs of spoilage caused by mold, insect infestation, or biochemical activity. Timely intervention such as aeration or cooling can prevent irreversible quality degradation.

Storage Management Temperature data guide effective storage management strategies including ventilation control and cooling schedules. Gradual cooling protocols (e.g., stepwise reductions of 5-7 °C) can preserve grain viability and reduce physiological activity efficiently.

Commercial Grain Handling Compliance with ISO 4112 assists grain producers, storage operators, and traders in meeting quality standards that influence market pricing and acceptance. Proper temperature control reduces the risk of economic losses due to rejected or downgraded grain lots.

Related Standards

ISO 712:2020 – Cereals and pulses - Determination of moisture content - Reference method

ISO 6673:2002 – Cereals and pulses - Sampling procedures for the determination of moisture content

ISO 7301:2005 – Cereals, pulses and milled products - Sampling

ISO 3166 – Codes for the representation of names of countries and their subdivisions (relevant for international grain trade documentation)

By adhering to ISO 4112:1990, stakeholders in the agricultural and food storage sectors can ensure reliable temperature monitoring of bulk-stored cereals and pulses, thereby preserving grain quality, enhancing storage efficiency, and supporting global trade standards.

ISO 4112:1990 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

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