ASTM_E_2241_-_06.pdf

Designation:E 2241 06Standard Test Method forAssessing the Current-Voltage Cycling Stability at RoomTemperature of Absorptive Electrochromic Coatings onSealed Insulating Glass Units1This standard is issued under the fixed designation E 2241;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 The test described is a method for the accelerated agingand monitoring of the time-dependent performance of electro-chromic windows(ECW).Cross sections of typical electro-chromic windows have three to five-layers of coatings thatinclude one to three active layers sandwiched between twotransparent conducting electrodes(TCEs,see Section 3).Ex-amples of the cross-sectional arrangements can be found in“Evaluation Criteria and Test Methods for ElectrochromicWindows.”2(For acronyms used in this standard,seeAppendixX1,section X1.1).1.2 The test method is applicable only for layered(one ormore active coatings between the TCEs)absorptive electro-chromic coatings on sealed insulating glass(IG)units fabri-cated for vision glass(superstrate and substrate)areas for usein buildings,such as glass doors,windows,skylights,andexterior wall systems.The layers used for electrochromicallychanging the optical properties may be inorganic or organicmaterials between the superstrate and substrate.1.3 The electrochromic coatings used in this test methodwill be subsequently exposed(see Test Methods E 2141)tosolar radiation and deployed to control the amount of radiationby absorption and reflection and thus,limit the solar heat gainand amount of solar radiation that is transmitted into thebuilding.1.4 The test method is not applicable to other chromogenicdevices,for example,photochromic and thermochromic de-vices.1.5 The test method is not applicable to electrochromicwindows that are constructed from superstrate or substratematerials other than glass.1.6 The test method referenced herein is a laboratory testconducted under specified conditions.This test is intended tosimulate and,possibly,to also accelerate actual in-service useof the electrochromic windows.Results from this test cannotbe used to predict the performance with time of in-service unitsunless actual corresponding in-service tests have been con-ducted and appropriate analyses have been conducted to showhow performance can be predicted from the accelerated agingtests.1.7 The values stated in metric(SI)units are to be regardedas the standard.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:32.1.1 For additional useful standards related to this stan-dard,see Appendix X1,section X1.2.C 168 Terminology Relating to Thermal InsulationC 1199 Test Method for Measuring the Steady-State Ther-mal Transmittance of Fenestration Systems Using Hot BoxMethodsE 632 Practice for Developing Accelerated Tests to AidPrediction of the Service Life of Building Components andMaterialsE 903 Test Method for Solar Absorptance,Reflectance,andTransmittance of Materials Using Integrating Spheres4E 1423 Practice for Determining Steady State ThermalTransmittance of Fenestration SystemsE 2094 Practice for Evaluating the Service Life of Chro-mogenic GlazingsE 2141 Test Methods for Assessing the Durability of Ab-sorptive Electrochromic Coatings on Sealed InsulatingGlass UnitsG 113 Terminology Relating to Natural and Artificial1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.22on Durability Performance of Building Constructions.Current edition approved Sept.1,2006.Published September 2006.Originallyapproved in 2002.Last previous edition approved in 2002 as E 2241 02.2Czanderna,A.W.,and Lampert,C.M.,“Evaluation Criteria and Test Methodsfor Electrochromic Windows,”SERI/PR-255-3537,July 1990,Golden,CO;SolarEnergy Research Institute.3For 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.4Withdrawn.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Weathering Tests of Nonmetallic Materials2.2Canadian Standard:CAN/CGSB 12.8 Insulating Glass Units3.Terminology3.1 DefinitionsRefer to terminology in TerminologyC 168,Practice E 632,and Terminology G 113 for descriptionsof general terms.3.2 Definitions of Terms Specific to This Standard:3.2.1 accelerated aging testan aging test in which