ASTM E2240 Standard Test Method for Assessing the Current-Voltage Cycling Stability at 90°C (194°F) of Absorptive Electrochromic Coatings on Sealed Insulating Glass Units
ASTM E2240密封绝缘玻璃装置有吸收力电致变色覆层在90℃(194°F)时电流-电压循环稳定性评估标准试验方法
This test method is intended to provide a means for evaluating the current-voltage cycling stability at 90°C (194°F) of ECWs as described in 1.2.2 ,4 (See Appendix X1, sections X1.4-X1.7.)
1. Scope
1.1 This test method covers the accelerated aging and monitoring of the time-dependent performance of electrochromic windows (ECW). Cross sections of typical electrochromic windows have three to five-layers of coatings that include one to three active layers sandwiched between two transparent conducting electrodes (TCEs, see Section ). Examples of the cross-sectional arrangements can be found in "Evaluation Criteria and Test Methods for Electrochromic Windows." (For acronyms used in this standard, see , section ).
1.2 This test method is applicable only for layered (one or more active coatings between the TCEs) absorptive electrochromic coatings on sealed insulating glass (IG) units fabricated for vision glass (superstrate and substrate) areas for use in buildings, such as glass doors, windows, skylights, and exterior wall systems. The layers 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 will be subsequently exposed (see Test Methods E 2141) to solar radiation and 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.
1.4 This test method is not applicable to other chromogenic devices, for example, photochromic and thermochromic devices.
1.5 This test method is not applicable to electrochromic windows that are constructed from superstrate or substrate materials other than glass.
1.6 This test method referenced herein is a laboratory test conducted under specified conditions. This test is intended to simulate and, possibly, to also accelerate actual in-service use of the electrochromic windows. Results from this test 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.
1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately)
ASTM Standards
C168 Terminology Relating to Thermal Insulation
C1048 Specification for Heat-Treated Flat Glass--Kind HS, Kind FT Coated and Uncoated Glass
C1199 Test Method for Measuring the Steady-State Thermal Transmittance of Fenestration Systems Using Hot Box Methods
E632 Practice for Developing Accelerated Tests to Aid Prediction of the Service Life of Building Components and Materials
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
E2094 Practice for Evaluating the Service Life of Chromogenic Glazings
E2141 Test Methods for Assessing the Durability of Absorptive Electrochromic Coatings on Sealed Insulating Glass Units
E2188 Test Method for Insulating Glass Unit Performance
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
Canadian Standard
CAN/CGSB12.8 Insulating Glass Unit
Index Terms
chromogenic glazing; durability; electrochromic windows; fenestration; fenestration products;
