Original Press Release
Calibration of Radiometers Is Covered in New ASTM Weathering and Durability Standard
Press release date: September 19, 2011
W. CONSHOHOCKEN, Pa.-Manufacturers of solar radiometers and testing laboratories for solar energy, materials and durability testing will be among the primary users of a new ASTM International standard that outlines procedures using indoor test methods to calibrate radiometers with dissimilar detectors.
The new standard, ASTM G207, Test Method for Indoor Transfer of Calibration from Reference to Field Pyranometers, was developed by Subcommittee G03.09 on Radiometry, part of ASTM International Committee G03 on Weathering and Durability. ASTM G207 facilitates calibration of solar sensors used in accelerated testing under simulated sunlight and outdoor weathering tests as well as performance monitoring of solar energy conversion systems.
Daryl Myers, a senior scientist at the National Renewable Energy Laboratory, and the chairman of G03.09, says that the most important practical implication of ASTM G207 is that transfer between an expensive, well-calibrated thermopile instrument and much cheaper solid state devices can be accomplished indoors, when properly conducted, with computable uncertainty.
"Calibration becomes independent of weather and outdoor conditions," says Myers. "The process permits calibration of a large number of inexpensive sensors with respect to a single expensive reference radiometer more quickly."
Myers notes that manufacturers and users of radiometers are encouraged to join in the standards developing activities of G03.09.
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ASTM Committee G03 Next Meeting: Jan. 29-31, 2012, January Committee Week, Atlanta, Ga. Technical Contact: Daryl Myers, National Renewable Energy Laboratory, Golden, Colo., Phone: 303-384-6768; email@example.com
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