ISO 7700-1:2008 PDF

Name: ISO 7700-1:2008 — Food products — Checking the performance of moisture meters in use — Part 1: Moisture meters for cereals
SKU: ISO 7700-1:2008
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Food products — Checking the performance of moisture meters in use — Part 1: Moisture meters for cereals

Название (английский):

ISO 7700-1:2008

Food products — Checking the performance of moisture meters in use — Part 1: Moisture meters for cereals

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 11 ноября 2008 г.
Издание:: ISO IS 7700 edition 2 version 1
ICS:: 67.260

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Описание (английский):

ISO 7700-1:2008 specifies a method of checking the performance of moisture meters in service for measuring the moisture content of cereal grains. ISO 7700-1:2008 is not applicable for pattern approval, nor for the initial calibration of moisture meters. The results of the checking described in ISO 7700-1:2008 are used to decide whether to perform a revision or a repair of the moisture meter.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 7700-1:2008 - "Food products - Checking the performance of moisture meters in use - Part 1: Moisture meters for cereals" - specifies a standard method for checking the in-service performance of moisture meters used to measure moisture content of cereal grains. It is intended for periodic performance checks (not for pattern approval or initial calibration) and provides criteria to decide whether a moisture meter requires revision or repair.

Key topics and requirements

Scope: Performance checking of moisture meters for cereal grains in operational conditions. Not applicable to pattern approval or initial calibration.

Reference methods: Uses routine reference methods - ISO 712 for most cereals and ISO 6540 for maize - as the true moisture content benchmark.

Apparatus: Bottles with airtight seals, sample divider, sieves (per ISO 5223), thermometer, and routine moisture-determination equipment.

Sample selection & preparation:

Use at least two cereal species (or two grain types for maize/rice) with two samples each having markedly different moisture contents within the meter’s range.
Clean and homogenize samples using specified sieves; keep test sample volumes at ~2/3 bottle capacity to avoid moisture exchange.

Procedure:

Take an initial reference test portion (B) and determine moisture content by ISO 712/6540.
Perform multiple measurements with the moisture meter on the test portion (A−B), ensuring thermal equilibrium (recommended 15–25 °C) between meter and sample.
Take a final reference test portion (C) and re-determine moisture content to compute the true value (mean of initial and final).

Expression of results:

Calculate differences between each meter reading and the true value.
Repeat the test if the two reference determinations differ by more than 0.3% (mass fraction).

Maximum permissible errors (MPEs):

Cereals (other than maize, rice, sorghum): ±0.7% for w ≤ 10%; for w > 10%: ±(0.4% + 3% of w).
Maize, rice, sorghum: ±0.8% for w ≤ 10%; for w > 10%: ±(0.4% + 4% of w).
Examples and calculation guidance provided in the standard.

Test report: Must identify the meter, samples, test conditions (temperature), measurements, and any incidents affecting results.

Applications and users

This standard is practical for:

Grain handlers, storage operators, millers and processors conducting routine quality control.

Equipment maintenance technicians and service providers assessing instrument performance in use.

Quality managers and auditors ensuring moisture measurement reliability for inventory valuation, storage decisions and food safety.

Laboratories performing on-site verification before deciding on repairs or recalibration.

Keywords: ISO 7700-1:2008, moisture meters, cereals, moisture content, checking performance, ISO 712, ISO 6540, maximum permissible error.

ISO 7700-1:2008 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

SIST EN ISO 712-2:2024

Cereals and cereal products - Determination of moisture content - Part 2: Automatic drying oven method (ISO 7…

SIST EN ISO 6540:2021

Maize - Determination of moisture content (on milled grains and on whole grains) (ISO 6540:2021)

ISO 5223:1995/Amd 1:1999

Test sieves for cereals — Amendment 1: Additional sizes