ISO 80000-5:2019/AMD1:2025 PDF

Overview

ISO 80000-5:2019/AMD1:2025 is the first amendment to the second edition of ISO 80000-5, which covers quantities and units related to thermodynamics. Developed collaboratively by ISO Technical Committee ISO/TC 12 and IEC Technical Committee IEC/TC 25, this amendment updates definitions, symbols, and units to align with the latest international standards. Published by the International Organization for Standardization (ISO), it integrates key updates from the International System of Units (SI) as defined by the Bureau International des Poids et Mesures (BIPM).