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Content
Content (en)
Foreword
Introduction
Scope
Normative references
Terms and definitions
Principle
General
Significance
Use of accelerated tests with laboratory light sources
Requirements for laboratory exposure devices
Irradiance
Temperature
Humidity and wetting
Moisture
Water purity
Water purity for xenon lamp and carbon arc instruments
Water purity for UV fluorescent lamp instruments
Contamination
Silica content
Fabrication of the components
Humidity
Wetting
Other requirements for the exposure device
Test specimens — Preparation, replicates, storage and conditioning
Handling of test specimens
Form, shape, preparation
Number of test specimens
Storage and conditioning
Test conditions and procedure
Set points for exposure conditions
Property measurements on test specimens
Periods of exposure and evaluation of test results
General
Sampling
Determination of changes in properties after exposure
Use of control materials
Use of results in specifications
Test report
Procedure for measuring the irradiance uniformity in the specimen exposure area (informative)
Factors that decrease the degree of correlation between artificial accelerated weathering or artificial accelerated irradiation exposures and actual-use exposures (informative)
Differences between the spectral distribution of the laboratory light source and that of solar radiation
Light intensities higher than those experienced in actual-use conditions
Continuous exposure to light with no dark periods
Specimen temperatures that are abnormally high relative to actual-use
Exposure conditions that produce unrealistically large temperature differences between light- and dark-coloured specimens
Temperature-cycling conditions that are different from those found in actual-use conditions
Unrealistic levels of moisture in the accelerated test compared to those found in actual-use conditions
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