ISO 31-1-1992 amd1-1998 PDF

Full title and description

ISO 31-1:1992/Amd 1:1998 — Quantities and units — Part 1: Space and time — Amendment 1. A one-page amendment published in December 1998 that applies changes and clarifications to ISO 31-1:1992 (the part of ISO 31 that defines names, symbols and definitions for quantities and units related to space and time).

Abstract

This amendment (ISO 31-1:1992/Amd 1:1998) issues editorial corrections and limited technical clarifications to the 1992 text of ISO 31-1 (Space and time). It updates or clarifies presentation, definitions or conversion factors for certain space- and time-related quantities and units so that the base part (ISO 31-1:1992) remains consistent pending later revision by the ISO 80000 series.

General information

• Status: Withdrawn
• Publication date: 1998-12-20 (Amendment published)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 01.060 — Quantities and units
• Edition / version: Edition 2 (ISO 31-1:1992 — Amendment 1:1998)
• Number of pages: 1

Scope

This document is an amendment to ISO 31-1:1992 and is limited in scope. It applies only to Part 1 (Space and time) of ISO 31 and provides corrections, clarifications and small technical adjustments to the treatment of quantities and units related to spatial and temporal measures (for example: symbols, brief definitions, presentation rules and conversion factors). The amendment does not stand alone as a full replacement of ISO 31-1:1992; the complete Part 1 remains the primary text.

Key topics and requirements

• Editorial corrections and clarifications to ISO 31-1:1992 text.
• Refinements to names, symbols and brief definitions for space- and time-related quantities (length, angle, solid angle, position, time interval, etc.).
• Clarification or correction of unit symbols and their recommended presentation (for example metre, radian, degree, steradian, second).
• Adjustment or confirmation of conversion factors and notes on certain non-SI units where appropriate.
• Maintains consistency with the rest of the ISO 31 series pending revision by ISO 80000.

Typical use and users

Used by standards committees, metrologists, technical editors, scientific and engineering authors, publishers and educators for consistent presentation of space- and time-related quantities and units in technical documents. Also referenced by national standards bodies and organisations aligning national practice with international unit notation and conversion guidance.

Related standards

ISO 31-1:1992 (base part), other parts of the ISO 31 series (ISO 31-0, ISO 31-2, ISO 31-3, etc.), the ISO 80000 series (notably ISO 80000-3:2006 and ISO 80000-3:2019 which subsequently revised/superseded ISO 31-1), the SI Brochure (BIPM), and related IEC/ISO standards on symbols and units (for example IEC/ISO documents addressing letter symbols and units).

Keywords

quantities; units; space; time; ISO 31-1; amendment; radian; steradian; metre; second; conversion factors; SI notation; metrology; symbols; definitions

FAQ

Q: What is this standard?

A: ISO 31-1:1992/Amd 1:1998 is a one-page amendment to ISO 31-1:1992 (Quantities and units — Part 1: Space and time), issued to correct and clarify aspects of the 1992 text relating to space- and time-related quantities and units.

Q: What does it cover?

A: It covers editorial and limited technical corrections or clarifications to names, symbols, definitions and conversion factors for quantities and units of space and time already specified in ISO 31-1:1992. It is not a full revision but modifies the 1992 part where necessary.

Q: Who typically uses it?

A: Standards developers, metrologists, engineers, scientists, technical writers and publishers who require authoritative guidance on the notation and conversion of spatial and temporal quantities use ISO 31-1 and its amendment as reference material.

Q: Is it current or superseded?

A: The amendment is withdrawn. ISO 31-1:1992 and its 1998 amendment were later superseded by ISO 80000-3:2006 (which in turn has a more recent edition ISO 80000-3:2019). The amendment was published on 1998-12-20 and was withdrawn as part of the transition to the ISO 80000 series (ISO records indicate the ISO 80000 consolidation began in 2006).

Q: Is it part of a series?

A: Yes — it is part of the ISO 31 series (Quantities and units). The ISO 31 series has been superseded by the ISO 80000 series (Quantities and units), with ISO 80000-3 covering space and time.

Q: What are the key keywords?

A: Quantities, units, space, time, metre, second, radian, steradian, SI, conversion factors, ISO 31, amendment.