Normy

Obsah

ČSN EN 15048-2 This European Standard specifies the technical requirements for structural bolting assemblies in order to ensure the suitability for non-preloaded bolted connections in steel structures or aluminium structures. A suitability test is specified to check the behaviour of the structural bolting assemblies. It applies to bolting assemblies specified in EN 15048-1.

Obsah

ČSN CLC/TS 50131-12 This Technical Specification provides recommendations for those methods of setting and unsetting an Intrusion Alarm System (IAS) complying with EN 50131-1 that will reduce unwanted alarms arising from "operator error" in setting and unsetting the IAS and provide confidence that the conditions in which the system is installed are conducive to system reliability during the "set" period. This document details optional methods by which these goals may be achieved, either in isolation, or in conjunction with verification methods. These recommendations should be incorporated into the respective standards in the EN 50131-1 series . This Technical Specification also provides (in Annex A) recommendations for equipment and (in Annex C) associated test requirements, in order to permit the manufacture of standardized equipment to provide the functionality needed by an IAS to meet these recommendations.

Obsah

ČSN EN 60702-3 This part of IEC 60702 provides guidance for the safe use of mineral insulated cables and their terminations with a rated voltage not exceeding 750 V which are specified in IEC 60702-1 and IEC 60702-2.

Obsah

ČSN EN 50290-2-37 This Part 2-37 of EN 50290 gives specific requirements for Polyethylene (PE) compounds to be used for the insulation of coaxial cables. The standard includes Low Density (LD), Medium Density (MD) and High Density (HD) Polyethylene compounds. It is to be read in conjunction with EN 50290 2 20, EN 50117 and other applicable product standards. Using raw material and type test data as outlined in this standard, the raw material supplier will have sufficient data to demonstrate compliance and warrant that the material is suitable for the specified application.

Obsah

ČSN EN 61300-2-47 ed. 4 Norma popisuje zkoušku, ověřující schopnost optických vláknových zařízení odolávat teplotním šokům, vyvolaných časově velmi rychlými změnami teploty prostředí v rozsahu extrémně nízkých a vysokých hodnot. Norma seznamuje s principem zkoušky v souladu s EN 60068-2-14, zkouška N. Uvádí postupy jejího provedení, manuální a automatický, včetně přípravy vzorku, počátečního a konečného měření, aklimatizace po zkoušce a předepisuje potřebnou výbavu. Definuje časový profil teploty jednoho zkušebního cyklu a stanovuje příslušné přísnosti zkoušky spočívající v kombinaci v trvání expozice při extrémních teplotách, časového intervalu střídání obou extrémních teplot v automatickém i manuálním režimu zkoušky a počtu zkušebních cyklů. Norma předepisuje údaje, které se musí pro toto zkoušení stanovit. V informativní příloze A se zmiňuje minimální hodnota teploty předepsané ve Finsku pro provoz optických vláknových zařízení určených pro kategorie prostředí O, E, A a G.

Obsah

ČSN EN 62827-1 This part of IEC 62827 specifies common components of management for multiple sources and devices in a wireless power transfer system, and justifies various functions for wireless power transfer. This part of IEC 62827 defines the reference models for possible configurations of a wireless power transfer system. The models are specified in additional parts in more detail.

Obsah

ČSN EN ISO/IEC 30121 This International Standard provides a framework for Governing bodies of organizations (including owners, board members, directors, partners, senior executives, or similar) on the best way to prepare an organization for digital investigations before they occur. This International Standard applies to the development of strategic processes (and decisions) relating to the retention, availability, access, and cost effectiveness of digital evidence disclosure. This International Standard is applicable to all types and sizes of organizations.

Obsah

ČSN EN 13348 Tato evropská norma stanovuje požadavky, odběr vzorků, zkušební metody a podmínky dodávání pro trubky z mědi. Tato norma platí pro bezešvé kruhové trubky z mědi, které mají vnější průměr od 6 mm do a včetně 219 mm, pro vakuové potrubní systémy nebo pro rozvod následujících medicinálních plynů, určených k použití při pracovních tlacích až do 2 000 kPa: - kyslík, oxid dusný, dusík, helium, oxid uhličitý, xenon; - medicinální vzduch; - zvláštní směsi výše uvedených plynů; - vzduch pro pohon chirurgických nástrojů; - anestetické plyny a páry.

Obsah

ČSN EN ISO 16012 This International Standard specifies measuring equipment and procedures for the determination of the linear dimensions of rigid plastics test specimens. It is applicable to test specimens described in ISO 20753 but can also be used for other test specimens, and to thicknesses typically in the range 0,4 mm

Obsah

ČSN EN ISO 19064-1 This part of ISO 19064 establishes a system of designation for styrene/acrylonitrile (SAN) moulding and extrusion materials, which may be used as the basis for specifications. The types of styrene/acrylonitrile plastic are differentiated from each other by a classification system based on appropriate levels of the designatory properties, a) Vicat softening temperature, b) melt mass-flow rate, and on information about composition, intended application and/or method of processing, important properties, additives, colorants, fillers and reinforcing materials. This part of ISO 19064 is applicable to all copolymers of styrene and/or substituted styrene having between 5 % (m/m) and 50 % (m/m) acrylonitrile. It applies to materials ready for normal use, unmodified or modified by colorants, additives, fillers, etc. This part of ISO 19064 does not apply to expandable materials. It is not intended to imply that materials having the same designation give necessarily the same performance. This part of ISO 19064 does not provide engineering data, performance data or data on processing conditions which may be required to specify a material for a particular application and/or method of processing. If such additional properties are required, they shall be determined in accordance with the test methods specified in ISO 4894-2, if suitable. In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5 (see 3.1).

Obsah

ČSN EN ISO 19063-1 This part of ISO 19063 establishes a system of designation for impact-resistant polystyrene (PS-I) moulding and extrusion materials, which may be used as the basis for specifications. The types of impact-resistant polystyrene plastic are differentiated from each other by a classification system based on appropriate levels of the designatory properties: a) Vicat softening temperature; b) melt mass-flow rate; c) Charpy notched impact strength; d) flexural modulus; and on information about composition, intended application and/or method of processing, important properties, additives, colorants, fillers, and reinforcing materials. This part of ISO 19063 is applicable to all impact-resistant polystyrene plastics with a two-phase polymer system comprised of a continuous phase, consisting of polystyrene and/or a copolymer of styrene with an alkyl-substituted styrene, and a dispersed elastomeric phase based on butadiene. It applies to materials ready for normal use, unmodified or modified by colorants, additives, fillers, etc. This part of ISO 19063 does not apply to expandable materials. It is not intended to imply that materials having the same designation give necessarily the same performance. This part of ISO 19063 does not provide engineering data, performance data, or data on processing conditions which may be required to specify a material for a particular application and/or method of processing. If such additional properties are required, they will be determined in accordance with the test methods specified in ISO 2897 2, if suitable. In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5 (see 3.1).

Obsah

ČSN EN ISO 4629-2 This part of ISO 4629 specifies a titrimetric method for determining the hydroxyl value of resins, binders for paints and varnishes, primary alcohols, glycols and fats. Whether it can be applied for hydro carboxylic acids, phenolic hydroxyl groups, polyols such as trimethyl propane and substances containing aromatic groups have been activated for Friedel-Crafts acylation shall be decided on case-to-case basis. Under the right conditions, the method is also applicable for determining the hydroxyl value of castor oil and its derivatives.