ASTM_E_1125_-_16.pdf

Designation:E112516Standard Test Method forCalibration of Primary Non-Concentrator TerrestrialPhotovoltaic Reference Cells Using a Tabular Spectrum1This standard is issued under the fixed designation E1125;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is intended for calibration and charac-terization of primary terrestrial photovoltaic reference cells toa desired reference spectral irradiance distribution,such asTables G173.The recommended physical requirements forthese reference cells are described in Specification E1040.Reference cells are principally used in the determination of theelectrical performance of photovoltaic devices.1.2 Primary photovoltaic reference cells are calibrated innatural sunlight using the relative quantum efficiency of thecell,the relative spectral distribution of the sunlight,and atabulated reference spectral irradiance distribution.Selectionof the reference spectral irradiance distribution is left to theuser.1.3 This test method requires the use of a pyrheliometer thatis calibrated according to Test Method E816,which requiresthe use of a pyrheliometer that is traceable to the WorldRadiometric Reference(WRR).Therefore,reference cellscalibrated according to this test method are traceable to theWRR.1.4 This test method is used to calibrate primary referencecells;Test Method E1362 may be used to calibrate secondaryand non-primary reference cells(these terms are defined inTerminology E772).1.5 This test method applies only to the calibration of aphotovoltaic cell that shows a linear dependence of its short-circuit current on irradiance over its intended range of use,asdefined in Test Method E1143.1.6 This test method applies only to the calibration of areference cell fabricated with a single photovoltaic junction.1.7 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.8 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E490 Standard Solar Constant and Zero Air Mass SolarSpectral Irradiance TablesE772 Terminology of Solar Energy ConversionE816 Test Method for Calibration of Pyrheliometers byComparison to Reference PyrheliometersE927 Specification for Solar Simulation for PhotovoltaicTestingE948 Test Method for Electrical Performance of Photovol-taic Cells Using Reference Cells Under Simulated Sun-lightE973 Test Method for Determination of the Spectral Mis-match Parameter Between a Photovoltaic Device and aPhotovoltaic Reference CellE1021 Test Method for Spectral Responsivity Measurementsof Photovoltaic DevicesE1040 Specification for Physical Characteristics of Noncon-centrator Terrestrial Photovoltaic Reference CellsE1143 Test Method for Determining the Linearity of aPhotovoltaic Device Parameter with Respect To a TestParameterE1362 Test Methods for Calibration of Non-ConcentratorPhotovoltaic Non-Primary Reference CellsE2554 Practice for Estimating and Monitoring the Uncer-tainty of Test Results of a Test Method Using ControlChart TechniquesG138 Test Method for Calibration of a SpectroradiometerUsing a Standard Source of IrradianceG173 Tables for Reference Solar Spectral Irradiances:DirectNormal and Hemispherical on 37 Tilted Surface1This test method is under the jurisdiction of ASTM Committee E44 on Solar,Geothermal and OtherAlternative Energy Sources and is the direct responsibility ofSubcommittee E44.09 on Photovoltaic Electric Power Conversion.Current edition approved July 1,2016.Published October 2016.Originallyapproved in 1986.Last previous edition approved in 2015 as E1125 10(2015).DOI:10.1520/E1125-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 G183 Practice for Field Use of Pyranometers,Pyrheliom-eters and UV Radiometers2.2 WMO Document:3WMO-No.8 Guide to Meteorological Instruments andMethods of Observation,Seventh ed.,2008.3.Terminology3.1 DefinitionsDefinitions of terms used in this testmethod may be found in Terminology E772.3.2 The following symbols and units are used in this testmethod:3.3 Symbols:3.3.1 Axcollimator aperture identifiers(non-numeric).3.3.2 Ccalibration value,reference cell(Am2W1).3.3.3 Carray of calibration values,reference cell(Am2W1).3.3.4 Das a subscript,re