IEC 62788-1-4 Amd.1 Ed. 1.0 b:2020
Amendment 1 – Measurement procedures for materials used in photovoltaic modules – Part 1-4: Encapsulants – Measurement of optical transmittance and calculation of the solar-weighted photon transmittance, yellowness index, and UV cut-off wavelength
Amendment by International Electrotechnical Commission, 10/15/2020