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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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E772 Terminology of Solar Energy Conversion
G7 Practice for Atmospheric Environmental Exposure Testing of Nonmetallic Materials
G24 Practice for Conducting Exposures to Daylight Filtered Through Glass
G90 Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
ISO StandardsISO 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 9060 Solar Energy--Specification and Classification of Instruments for Measuring Hemispherical Solar and Direct Solar Radiation ISO 9370 Plastics--Instrumental Determination of Radiant Exposure in Weathering Tests--General Guidance ISO TR 9901 Solar Energy--Field Pyranometers--Recommended Practice for Use
WMO ReferenceWorld Meteorological Organization (WMO), 1983 Measurement of Radiation, Guide to Meteorological Instruments and Methods of Observation, seventh ed., WMO-No. 8, Geneva
ICS Number Code 17.240 (Radiation measurements)
UNSPSC Code 60104814(Radiometer); 12131600(Pyrotechnics)
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ASTM G183-05, Standard Practice for Field Use of Pyranometers, Pyrheliometers and UV Radiometers, ASTM International, West Conshohocken, PA, 2005, www.astm.orgBack to Top