This part of ISO 22975 specifies terms and test methods for the materials, durability and performance of vacuum tubes. This part of ISO 22975 is applicable to all types of vacuum tubes.
ISO 9806:2013 Solar energy.Solar thermal collectors.Test methods
ISO 9845-1:1992 Solar energy; reference solar spectral irradiance at the ground at different receiving conditions; part 1: direct normal and hemispherical solar irradiance for air mass 1,5
EN ISO 22975-1:2016 history
2016EN ISO 22975-1:2016 Solar energy - Collector components and materials - Part 1: Evacuated tubes - Durability and performance