This International Standard defines a test which determines the resistance of the module when exposed to ultra-violet (UV) radiation. This test is useful for evaluating the UV resistance of materials such as polymers and protective coatings. The object of this test is to determine the ability of the module to withstand exposure to ultraviolet (UV) radiation from 280 nm to 400 nm. Before conducting this test, light soaking or other pre-conditioning should be performed in accordance with IEC 61215 or IEC 61646.