UL 2823:2018-04 GREENGUARD Certification Program Method for Measuring and Evaluating Chemical and Particle Emissions From Electronic Equipment Using Dynamic Environmental Chambers.
1.1 Electronic equipment may emit a variety of volatile chemicals into the indoor air space of a building. The following methodology measures total volatile organic compounds (TVOC), individual volatile organic compounds (IVOCs), formaldehyde and other aldehydes, ozone and respirable particle emission levels from electronic equipment using test conditions defined to simulate product use in realistic commercial office. educational, healthcare and/or residential settings. The levels of emissions are determined by observing the TVOC, IVOC, aldehyde, ozone, and respirable particle (PM25) concentrations in a dynamic environmental chamber under specified test conditions. The observed chamber concentration is then converted by a mathematical calculation to an emission rate, a product specific variable, and then modeled to obtain room concentration estimates.
1 .2 This method may be used for certification solely by UL and its affiliated entities in the UL GREENGUARD certification program. Accordingly. only UL or its affiliated entities can determine and declare whether a product is in compliance with the requirements in this method. Any purported determination or declaration of testing, conformance, compliance or certification to this method by any other party is null and void and cannot be used to meet the requirements of this method.
1.3 The quantity of VOCs in the environmental chamber air is determined by gas chromatography/mass spectrometry (GC/MS). The methodology is generally applicable to volatile organic compounds with boiling points from 60 0 to 290 C emitting from individual products. Emissions of selected aldehydes are measured using reverse-phase high-performance liquid chromatography (HPLC) with UV detection. Ozone is measured using a UV-absorbance based ozone analyzer. Respirable particles (PM25) are monitored using a 90 light scattering measurement to continuously determine airborne particle concentrations over time. Specialized analysis of chamber air samples may be conducted for other specific target chemicals as specified for a specific productlproject requirement.
1.4 The methodology provides a standard means of reproducibly and accurately testing electronic equipment under a realistic, yet highly controlled, atmosphere.
1.5 The methodology with standardized measurement and analyses provides consistent testing of materials within a product group.
1.6 This protocol applies to any electronic equipment belonging to a product category generally used within an enclosed indoor environment. This includes, for example, computers, video monitors, televisions, DVD players, cable boxes, scanners. receivers. CD players, and speakers used in public and commercial office buildings, schools, medical buildings. residences and other building types. The protocol applies to products that can be tested alone or as part of a system.
1.7 This method establishes the procedures for product sample collection, emission testing and analysis, indoor air concentration modeling and associated documentation requirements.UL 2823 pdf download.