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This document is applicable to optical and electro-optical devices specified by the manufacturer for use by visually impaired persons as low vision aids. This document specifies requirements and test methods for optical and electro-optical devices specified by the manufacturer for use by visually impaired persons as low vision devices. Implantable low vision devices are excluded.

Le présent document prescrit une méthode pour la détermination de la dilatation à l’humidité des carreaux céramiques.

IEC 60794-1-31:2021 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60794-1-31:2021 which is a generic specification, covers optical fibre ribbons. Requirements which are…

IEC 60794-1-31:2021 which is a generic specification, covers optical fibre ribbons. Requirements which are described in this part apply to optical fibre ribbon cables for use with telecommunication equipment and devices employing similar techniques, in particular optical fibre cables in IEC 60794-2 for indoor use, in IEC 60794-3 for outdoor use, in IEC 60794-4 for self-supporting overhead use, in…

IEC 60794-1-31:2021 qui est une spécification générique, s’applique aux rubans de fibres optiques. Les exigences qui sont décrites dans la présente partie s’appliquent aux câbles à rubans de fibres optiques destinés à être utilisés dans les équipements de télécommunications et les dispositifs utilisant des techniques analogues, en particulier les câbles à fibres optiques de l’IEC 60794-2 pour une…

1 Scope 1.1 Products covered 1.1.1 This standard applies to motor control centers to be used in accordance with the U. S. National Electrical Code, ANSI/NFPA 70, CSA C22.1, Canadian Electrical Code, Part 1, and the Mexican Electrical Installations (Utility), NOM-001-SEDE. 1.1.2 These requirements cover motor control centers for use on circuits having available short-circuit currents not…

Le présent document spécifie les dimensions de raccordement principales, ainsi que les exigences de fonctionnement, pour les coupleurs hydrauliques utilisés pour transmettre la puissance hydraulique des tracteurs agricoles aux machines agricoles. Il s'applique aux coupleurs utilisés sur les canalisations hydrauliques, à l'exception des coupleurs utilisés dans les circuits de freinage.…

This document provides a description of methods by which the coating thickness and chemical composition of "core-shell" nanoparticles (including some variant and non-ideal morphologies) can be determined using electron spectroscopy techniques. It identifies the assumptions, challenges, and uncertainties associated with each method. It also describes protocols and issues for the general…

This document collects available data on combined chemical resistance of thermoplastic materials typically used to manufacture piping components for industrial applications, against fluids over a range of temperatures. The base thermoplastic materials covered by this classification are: Polyethylene                                                              PE NOTE 1        The PE considered in…

This document specifies the essential interface dimensions and the operating requirements for hydraulic couplers employed to transmit hydraulic power from agricultural tractors to agricultural machinery. It is applicable to couplers used in hydraulic lines other than those used for braking circuits. NOTE       All hydraulic couplers are intended to be connected and disconnected frequently to…