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IEC 61558-2-7:2023 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with the comprehensive content of the Standard. IEC 61558-2-7:2023 EXV includes the content of the references made to IEC 61558-1:2017. IEC 61558-2-7:2023 deals with the safety of transformers for…

IEC 61558-2-3:2023 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with the comprehensive content of the Standard. IEC 61558-2-3:2023 EXV includes the content of the references made to IEC 61558-1:2017. IEC 61558-2-3:2023 deals with the safety of ignition…

This document specifies methods used to measure the water content of polyols employed as polyurethane raw materials. Method A is a manual amperometric method which has been included to better define the principles of the Karl Fischer measurement. Amperometric methods are applicable to a wide range of polyols, including those which have enough colour to obscure a visual end-point. Method B…

This document establishes governing principles and guidelines for developing plain language documents. The guidelines detail how the principles are interpreted and applied. This document is for anybody who creates or helps create documents. The widest use of plain language is for documents that are intended for the general public. However, it is also applicable, for example, to technical writing…

Le présent document établit des principes directeurs et des lignes directrices pour l’élaboration de documents en langage clair. Les lignes directrices précisent comment interpréter et appliquer les principes. Le présent document s’adresse à toute personne qui crée ou aide à créer des documents. L’utilisation la plus répandue du langage clair concerne les documents destinés au grand public, mais…

IEC 60904-2:2023 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60904-2:2023 edition 4.0 and the previous IEC 60904-2:2015 edition 3.0. Furthermore, comments from IEC TC 82 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the…

This document specifies two methods for the determination of co-monomer contents of polyethylene products by solution state 13C-NMR spectrometry (nuclear magnetic resonance spectrometry): —    method A: inverse gated decoupling method. —    method B: insensitive nuclei enhanced by polarization transfer method; This document is applicable to copolymers of ethylene having a content of other 1-…

IEC TS 62903:2023 is available as IEC TS 62903:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC TS 62903:2023: a ) establishes the free-field convergent spherical wave self-reciprocity method for ultrasonic transducer calibration, b) establishes the measurement conditions and…

This document describes the method of determining the moisture content in the general analysis sample by drying in an oven. The method described in this document is applicable to all solid biofuels. The moisture content of solid biofuels (as received) is always reported based on the total mass of the test sample (wet basis). Since biofuels in small particle size are very hygroscopic, their…

This document is a method for determining ethoxylated alkylphenols (APEO) [nonyphenol ethoxylate (NPEOn, where 2 ≤ n ≤ 16) and octylphenol ethoxylate (OPEOn, where 2 ≤ n ≤ 16)] in leather. This direct method is especially suitable when a larger number of leather samples are to be checked for the presence of ethoxylated alkylphenols. This method requires the use of liquid chromatography (LC) with…