ASTM G183-05(2010) - 1.12.2010
 
1. Scope

1.1 This practice describes deployment conditions, maintenance requirements, verification procedures and calibration frequencies for use of pyranometers, pyrheliometers and UV radiometers in outdoor testing environments. This practice also discusses the conditions that dictate the level of accuracy required for instruments of different classes.

1.2 While both pyranometers and UV radiometers may be employed indoors to measure light radiation sources, the measurement of ultraviolet and light radiation in accelerated weathering enclosures using manufactured light sources generally requires specialized radiometric instruments. Use of radiometric instrumentation to measure laboratory light sources is covered in ISO 9370.

Note 1—An ASTM standard that is similar to ISO 9370 is under development and deals with the instrumental determination of irradiance and radiant exposure in weathering tests.

1.3 The characterization of radiometers is outside the scope of the activities required of users of radiometers, as contemplated by this standard.

 
2. Referenced Documents

ISO 9060

Solar Energy--Specification and Classification of Instruments for Measuring Hemispherical Solar and Direct Solar Radiation

G90-23

Standard Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight

E772-15(2021)

Standard Terminology of Solar Energy Conversion

G7-05

Standard Practice for Atmospheric Environmental Exposure Testing of Nonmetallic Materials

G24-21

Standard Practice for Conducting Exposures to Daylight Filtered Through Glass

G113-22

Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

ISO 877

Plastics--Methods of Exposure to Direct Weathering, Indirect Weathering Using Glass-Filtered Daylight and Indirect Weathering by Daylight Using Fresnel Mirrors Available from International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http://www.iso.org.

ISO TR 9901

Solar Energy--Field Pyranometers--Recommended Practice for Use

World Meteorological Organization (WMO), 1983

Measurement of Radiation, Guide to Meteorological Instruments and Methods of Observation, seventh ed., WMO-No. 8, Geneva

ISO 9370

Plastics--Instrumental Determination of Radiant Exposure in Weathering Tests--General Guidance