This standard specifies the ultraviolet irradiance (of the object Specifies the high-energy (1) ultraviolet irradiance meter (hereinafter referred to as irradiance meter) for metal halide lamp type testing machines that uses a photoelectric element temporarily installed inside the testing machine to measure the density of ultraviolet radiation applied to a surface (density of ultraviolet radiation applied to a surface). do. When using this standard, the upper temperature limit of the light receiving part is 70°C. Note (1) High energy in this standard is defined as a wavelength range of 300-400 nm and an irradiance of 300 W m-2 or more.