SN EN ISO 4892-1 : 2001

1 Scope
2 Normative references
3 Terms and definitions
4 Principle
  4.1 Significance
  4.2 Use of accelerated tests with laboratory light sources
5 Requirements for laboratory exposure devices
  5.1 Light source
  5.2 Temperature
  5.3 Humidity and wetting
  5.4 Other apparatus requirements
6 Test specimens
  6.1 Form, shape and preparation
  6.2 Number of test specimens
  6.3 Storage and conditioning
7 Test conditions and procedure
8 Precision and bias
  8.1 Precision
  8.2 Bias
9 Test report
Annex A (informative) Factors that decrease the degree or
                      correlation between accelerated tests
                      using laboratory light sources and
                      actual-use exposures
Annex B (informative) Procedures for measuring the irradiance
                      uniformity in the specimen exposure area
Figure B.1 - Measurement of irradiance in devices using a
             rotating specimen drum
Figure B.2 - Measurement of irradiance uniformity in devices
             with a flat specimen plane
Figure B.3 - Typical plot of measured property for a reference
             material showing a linear change with radiant
             exposure and for a material that shows an induction
             period before any measurable property change.
Table 1 - Spectral global irradiance

Supplies information and general guidance relevant to the selection and operation of the methods of exposure described in detail in subsequent parts. It also describes and recommends procedures for determining irradiance and radiant exposure. Requirements for devices used to monitor chamber air temperature and surface temperature of dark and light materials are also described. This part of ISO 4892 also provides information on the interpretation of data from accelerated exposure tests. More specific information about methods for determining the change in plastic properties after exposure and reporting these results is described in ISO 4582.