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Significance and Use
1.1 These test methods cover the accelerated aging and monitoring of the time-dependent performance of electrochromic glazings. Cross sections of typical electrochromic windows are shown in which devices have four or five-layers of coatings that include the two or three active layers sandwiched between transparent conducting electrodes (TCOs, see Section 3).
1.2 The test methods are applicable only for multilayered (two or more coatings between the TCOs) absorptive electrochromic coatings on sealed insulating glass (IG) units fabricated for vision glass (superstrate and substrate) areas for use in buildings, such as sliding doors, windows, skylights, and exterior wall systems. The multilayers used for electrochromically changing the optical properties may be inorganic or organic materials between the superstrate and substrate.
1.3 The electrochromic coatings used in this test method are exposed to solar radiation and are deployed to control the amount of radiation by absorption and reflection and thus, limit the solar heat gain and amount of solar radiation that is transmitted into the building.
1.5 The test methods are not applicable to electrochromic devices consisting of three layers of coatings including the two transparent conducting electrodes (see Section 3).
1.7 The test methods referenced herein are laboratory tests conducted under specified conditions. These tests are intended to simulate and, in some cases, to also accelerate actual in-service use of the electrochromic windows. Results from these tests cannot be used to predict the performance with time of in-service units unless actual corresponding in-service tests have been conducted and appropriate analyses have been conducted to show how performance can be predicted from the accelerated aging tests.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C168 Terminology Relating to Thermal Insulation
C1199 Test Method for Measuring the Steady-State Thermal Transmittance of Fenestration Systems Using Hot Box Methods
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
E631 Terminology of Building Constructions
E892 Tables for Terrestrial Solar Spectral Irradiance at Air Mass 1.5 for a 37 Tilted Surface
E903 Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres
E1423 Practice for Determining Steady State Thermal Transmittance of Fenestration Systems
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
Canadian StandardsCAN/CGSB12.8 Insulating Glass Units Available from Canadian General Standards Board (CGSB), Place du Portage III, 6B1 11 Laurier Street Gatineau, Quebec, Canada.
ICS Number Code 81.040.20 (Glass in building)
UNSPSC Code 30171710(Insulating glass)
ASTM E2141-12, Standard Test Methods for Assessing the Durability of Absorptive Electrochromic Coatings on Sealed Insulating Glass Units, ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top