In this article, we will delve into the fascinating world of ISO 1 and explore its many facets. From its impact on society to its possible implications in the future, ISO 1 has captured the attention of experts and fans alike. Through an exhaustive and considered analysis, we will seek to shed light on this relevant and, at the same time, so enigmatic topic. Join us on this journey of discovery and reflection, where we will unravel the secrets and wonders that ISO 1 has to offer us.
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ISO 1 is an international standard set by the International Organization for Standardization that specifies the standard reference temperature for geometrical product specification and verification. The temperature is fixed at 20 degrees Celsius (°C), which exactly equals both 293.15 kelvin (K) and 68 degrees Fahrenheit (°F).
Due to thermal expansion, precision length measurements need to be made at (or converted to) a defined temperature. ISO 1 helps in comparing measurements by defining such a reference temperature. The reference temperature of 20 °C was adopted by the CIPM on 15 April 1931, and became ISO recommendation number 1 in 1951. It soon replaced worldwide other reference temperatures for length measurements that manufacturers of precision equipment had used before, including 0 °C, 62 °F, and 25 °C. Among the reasons for choosing 20 °C was that this was a comfortable and practical workshop temperature and that it resulted in an integer value on both the Celsius and Fahrenheit scales.
It was the first ISO standard, issued originally as ISO/R 1, a ISO Recommendation.