SIST-TP CEN ISO/TR 18486:2019 PDF

Name: SIST-TP CEN ISO/TR 18486:2019 — Plastics - Parameters comparing the spectral irradiance of a laboratory light source for weathering applications to a reference solar spectral irradiance (ISO/TR 18486:2018)
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Plastics - Parameters comparing the spectral irradiance of a laboratory light source for weathering applications to a reference solar spectral irradiance (ISO/TR 18486:2018)

Название (английский):

SIST-TP CEN ISO/TR 18486:2019

Plastics - Parameters comparing the spectral irradiance of a laboratory light source for weathering applications to a reference solar spectral irradiance (ISO/TR 18486:2018)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 16
Дата публикации:: 9 января 2019 г.
Издание:: ISO/TR 18486:2018
ICS:: 83.080.01

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Описание (английский):

This document specifies a calculation method which allows calculating a parameter which compares the spectral irradiance of a laboratory radiation source for weathering application to a reference solar spectral irradiance.

Abstract

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Упомянутые в описании и другие стандарты SIST

Overview

CEN ISO/TR 18486:2018 (ISO/TR 18486:2018) defines a calculation method to compare the spectral irradiance of a laboratory radiation source (solar simulator) used for weathering tests with a reference solar spectral irradiance. The Technical Report provides objective, repeatable parameters to quantify how well a solar simulator fits a chosen reference sun spectrum or a specific action spectrum relevant to polymer/photo‑chemical responses.

Key Topics and Requirements

Purpose: Provide objective factors (characterizing parameter f) that quantify the spectral fit between a laboratory source and a reference solar spectrum or an action spectrum.

Calculation method: Scale the laboratory source spectrum to the reference within a chosen wavelength range, then compute a deviation parameter f. An ideal fit yields f = 0; larger f values indicate worse fitting.

Wavelength selection: Choose a wavelength range (λ1 to λ2) relevant to the test or material; ranges should be larger than 10 nm. Annex A lists typical ranges for different applications.

Action spectra: When the polymer’s action spectrum s(λ) is known, scale and compare weighted spectral irradiances to assess photochemical relevance.

Spectral resolution: Measurements and calculations require 1 nm spectral resolution.

Reference spectra: The document recommends using solar spectra calculated with the SMARTS2 model (ISO/TR 17801, ASTM G177) because older references (e.g., CIE 85:1989) have limitations.

Informative content: Examples for commercial solar simulators and typical parameters are provided in Annex A.

Applications and Who Uses It

Materials scientists and polymer test laboratories evaluating artificial weathering and photochemical ageing.

Manufacturers and users of solar simulators and laboratory radiation sources who need to validate spectral performance.

Quality assurance and R&D teams selecting or qualifying lamps for accelerated weathering tests, photochemistry, photo‑dermatology, or thermal-stress experiments.

Standards bodies and test method authors integrating objective spectral-fit metrics into test procedures.

Practical benefits include clearer acceptance criteria for solar simulators, consistent reporting of spectral fitness, and improved alignment of laboratory weathering to real-world solar exposure.

Related Standards

ISO/TR 17801 - reference on solar spectral irradiance modeling (SMARTS2)

ASTM G177 - reference solar spectra using SMARTS2

CIE 85:1989 - historic reference spectrum (noted as limited; under revision)

Keywords: ISO/TR 18486:2018, CEN ISO/TR 18486, spectral irradiance, solar simulator, laboratory radiation source, weathering, action spectrum, plastics, SMARTS2, accelerated weathering.

SIST-TP CEN ISO/TR 18486:2019 PDF

Abstract

Похожие стандарты

Overview

Key Topics and Requirements

Applications and Who Uses It

Related Standards

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