ISO 1:2022 PDF

Name: ISO 1:2022 — Geometrical product specifications (GPS) — Standard reference temperature for the specification of geometrical and dimensional properties
SKU: ISO 1:2022
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Geometrical product specifications (GPS) — Standard reference temperature for the specification of geometrical and dimensional properties

Название (английский):

ISO 1:2022

Geometrical product specifications (GPS) — Standard reference temperature for the specification of geometrical and dimensional properties

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 14 июня 2022 г.
Издание:: ISO IS 1 edition 4 version 1
ICS:: 17.040.01

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Описание (английский):

This document defines the concepts of a reference temperature and the standard reference temperature and specifies the standard reference temperature value for the specification of geometrical and dimensional properties of an object. Some examples of geometrical and dimensional properties include size, location, orientation (including angle), form and surface texture of a workpiece. This document is also applicable to the definition of the measurand used in verification or calibration.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 1:2022 - Geometrical product specifications (GPS) - defines the concept of a reference temperature and fixes the standard reference temperature for specifying geometrical and dimensional properties. The standard sets the value of the standard reference temperature to 20 °C (ITS-90) and clarifies its role when defining size, location, orientation (including angle), form and surface texture of a workpiece. It also applies to the definition of the measurand used in verification and calibration.

Key topics and requirements

Standard reference temperature: The normal reference temperature for GPS is t = 20 °C, expressed on the International Temperature Scale of 1990 (ITS-90).

Reference temperature concept: Distinguishes between a general reference temperature (a specified uniform temperature of an object) and the internationally agreed normal reference temperature.

Applicability: The temperature applies to geometrical and dimensional properties (size, position, orientation, form, surface texture) and to measurands for verification/calibration.

Measurement and uncertainty: Where verification occurs at temperatures different from 20 °C, appropriate thermal corrections or uncertainty accounting are required. Specifying a non‑normal reference temperature can increase measurement uncertainty because most dimensional measuring instruments and gauges are calibrated with measurands defined at 20 °C.

ITS-90 clarification: ISO 1:2022 clarifies that 20 °C is the ITS-90 value; the ITS-90 approximation differs from thermodynamic temperature by about 2.8 mK at 20 °C, which for steel amounts to roughly 0.03 µm per meter - negligible for most work but relevant for high‑level calibration.

Practical applications and who uses it

ISO 1:2022 is essential for anyone involved in dimensional metrology, including:

Design engineers and CAD modelers specifying tolerances on drawings and product documentation

Quality engineers and inspectors performing dimensional verification

Calibration laboratories and metrology service providers defining measurands and calibration conditions

Manufacturers of dimensional measuring equipment and gauges

Standards committees and technical writers aligning GPS requirements

Typical uses:

Specify the reference temperature on technical drawings and CAD files

Define measurand conditions for calibration certificates

Apply thermal corrections or include temperature-related components in measurement uncertainty budgets

Ensure instruments are calibrated and reported relative to the 20 °C reference

Related standards

ISO 14638 (GPS matrix model) - situates ISO 1 within the broader GPS framework

ISO/IEC Guide 99 (VIM) - terminology for metrology

ISO/IEC Guide 98-3 (GUM) and ISO/TR 16015 - guidance on uncertainty and thermal effects

Keywords: ISO 1:2022, standard reference temperature, 20 °C, ITS-90, geometrical product specifications, GPS, measurement uncertainty, calibration, dimensional metrology, thermal expansion.

ISO 1:2022 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications and who uses it

Related standards

Технические детали

BS EN ISO 14638:2015

Geometrical product specifications (GPS). Matrix model.

BS ISO 10791-4:1998

Test conditions for machining centres. Accuracy and repeatability of positioning of linear and rotary axes.

SIST ISO/TR 16015:2004

Geometrical product specifications (GPS) -- Systematic errors and contributions to measurement uncertainty of…