This standard describes in detail the environment test method for opticalin strument under extreme temperature and Humidity conditions. ISO 9022-2:2015 is designed to assess the tolerance of instruments to changes in cold, hot and Humidity. Tests cover a variety of environments from low to high temperatures, from drying to wet, ensuring that instruments maintain performance and Stability under these conditions. This version replaces the previous ISO 9022-2:2002 standard and has been revised to reflect the latest technical requirements, ensuring the Reliability of opticalin strument in harsh environments.