ASTM E824-10(2018)e1
Transmission method for calibrating site pyradiometers from reference

Standard No.

ASTM E824-10(2018)e1

Release Date

2018

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E824-10(2018)e1

Scope

1.1 The method described in this standard applies to the transfer of calibration from reference to field radiometers to be used for measuring and monitoring outdoor radiant exposure levels. This standard has been harmonized with ISO 9847. 1.2 This test method is applicable to field radiometers regardless of the radiation receptor employed, but is limited to radiometers having approximately 180° (2π Steradian), field angles. 1.3 The calibration covered by this test method employs the use of natural sunshine as the source. 1.4 Calibrations of field radiometers may be performed at tilt as well as horizontal (at 0° from the horizontal to the earth). The essential requirement is that the reference radiometer shall have been calibrated at essentially the same tilt from horizontal as the tilt employed in the transfer of calibration. 1.5 The primary reference instrument shall not be used as a field instrument and its exposure to sunlight shall be limited to calibration or intercomparisons. NOTE 1—At a laboratory where calibrations are performed regularly it is advisable to maintain a group of two or three reference radiometers that are included in every calibration. These serve as controls to detect any instability or irregularity in the standard reference instrument. 1.6 Reference standard instruments shall be stored in a manner as to not degrade their calibration. 1.7 The method of calibration specified for total solar pyranometers shall be traceable to the World Radiometric Reference (WRR) through the calibration methods of the reference standard instruments (Test Methods G167 and E816), and the method of calibration specified for narrowand broad-band ultraviolet radiometers shall be traceable to the National Institute of Standards and Technology (NIST), or other internationally recognized national standards laboratories (Test Method G138). 1 This test method is under the jurisdiction of ASTM Committee G03 on Weathering and Durability and is the direct responsibility of Subcommittee G03.09 on Radiometry. Current edition approved April 15, 2018. Published June 2018. Originally approved in 1994. Last previous edition approved in 2010 as E824 – 10. DOI: 10.1520/E0824-10R18E01. Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. 1 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM E824-10(2018)e1 Referenced Document

• ASTM E772 Standard Terminology Relating to Solar Energy Conversion
• ASTM E816 Standard Test Method for Calibration of Pyrheliometers by Comparison to Reference Pyrheliometers
• ASTM G113 Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
• ASTM G138 Standard Test Method for Calibration of a Spectroradiometer Using a Standard Source of Irradiance
• ASTM G167 Standard Test Method for Calibration of a Pyranometer Using a Pyrheliometer
• ISO 9847 Solar energy — Calibration of pyranometers by comparison to a reference pyranometer

ASTM E824-10(2018)e1 history

• 2018 ASTM E824-10(2018)e1 Transmission method for calibrating site pyradiometers from reference
• 2010 ASTM E824-10 Standard Test Method for Transfer of Calibration From Reference to Field Radiometers
• 2005 ASTM E824-05 Standard Test Method for Transfer of Calibration From Reference to Field Radiometers
• 1994 ASTM E824-94(2002) Standard Test Method for Transfer of Calibration From Reference to Field Radiometers
• 1994 ASTM E824-94 Standard Test Method for Transfer of Calibration From Reference to Field Radiometers