1.1This practice covers the basic principles and procedures for measuring the irradiance incident upon specimens in a weathering device when operating a specified weathering method. 1.2Requirements of radiometers and spectrometers for making irradiance measurements and procedures for their calibration are described. 1.3This practice is applicable to all types of weathering devices including fluorescent ultraviolet lamp devices, filtered xenon arc devices and metal halide devices.
Each weathering device manufacturer has their own approach to calibration of irradiance. Lack of specific guidelines for the reliable determination of specimen irradiance in weathering devices is a significant factor in the variabiliy of artificial weathering test results. This standard will propose a uniform set of best practices for the choice and calibration of radiometers used to measure the irradiance provided by the various types of weathering devices. It is intended for use by manufacturers, test laboratories and end users of weathering devices.
Keywordscalibration, weathering, artificial, accelerated
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development