ISO 18543:2021 pdf download – Glass in building — Electrochromic glazings — Accelerated ageing test and requirements.
1 Scope This document specifies the accelerated ageing test and requirements for electrochromic glazings intended to either control direct or indirect solar transmission, or both. The electrochromic glazings can be assembled as insulating glass unit, laminated glass or combination of both. The test method described in this document is only applicable to chromogenic glazings that can be switched between different transmission states using an electrical stimulus. This test method is not applicable to other chromogenic glazings such as photochromic and thermochromic glazings, which do not respond to electrical stimulus. This test method is applicable to any electrochromic glazing fabricated for use in buildings such as in doors, windows, skylights, exterior wall systems and glazing exposed to solar radiation. The materials used for constructing the electrochromic glazing and for electrochromically changing its optical properties can be inorganic or organic materials. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 9050, Glass in building — Determination of light transmittance, solar direct transmittance, total solar energy transmittance, ultraviolet transmittance and related glazing factors ISO 12543 (all parts), Glass in building — Laminated glass and laminated safety glass ISO 20492 (all parts), Glass in buildings — Insulating glass 3? Terms? and? definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http:// www .electropedia .org/ — ISO Online browsing platform: available at https:// www .iso .org/ obp 3.1 chromogenic glazing glazing that has the ability to reversibly change either its visible or solar transmission, or both, in response to an external stimulus such as electrical voltage or current, solar radiation or temperature Note 1 to entry: Active components can be films, coatings, glasses or a combination of them. 3.2 electrochromic glazing chromogenic glazing (3.1) in which an applied voltage or current is used to reversibly modify either visible or solar transmission characteristics, or both Note 1 to entry: Active components are usually films, coatings or a combination of them.
6.2 Spectrometer (for steps 1 and 3) A spectrometer shall be used for obtaining and storing data from the optical characterization in the range 380 nm to 780 nm of the specimens in the highest and lowest transmission states. The lamp source can be a tungsten lamp or other lamp source that provides illumination from 380 nm to 780 nm. Fibre optic cables extend from the lamp source into the electrochromic glazing specimen holder and from the electrochromic glazing specimen holder to the spectrometer. One optical fibre guides the incident light from the lamp source to one side of the specimen; another optical fibre guides the transmitted light to the spectrometer attached to a computer. The fibres shall be optically coupled by properly aligned collimating lens assemblies attached to both the illuminating and the collecting fibres. 6.3 Switching control system (for steps 1 and 3) The switching to and from highest and lowest transmission states during spectrophotometer transmittance measurements can be done by means of a computer-controlled multichannel potentiostat or by manufacturer-supplied control system. 6.4 Test chamber (for step 2) The test chamber shall be temperature-controlled and shall contain lamps that have been filtered appropriately in order to simulate the spectral power distribution of solar radiation over the ultraviolet, visible and near infrared wavelength regions. As an example, Figure 2 shows the spectral irradiance of an appropriately filtered xenon arc source compared to the global Air Mass 1,5 spectrum.
ISO 18543:2021 pdf download – Glass in building — Electrochromic glazings — Accelerated ageing test and requirements
