Normy

Obsah

ČSN EN ISO 23500-4 This document specifies the chemical and microbiological requirements for concentrates used for haemodialysis and related therapies and applies to the manufacturer of such concentrates. This document is applicable to: - concentrates in both liquid and powder forms; - additives, also called spikes, which are chemicals that can be added to the concentrate to supplement or increase the concentration of one or more of the existing ions in the concentrate and thus in the final dialysis fluid; - equipment used to mix acid and bicarbonate powders into concentrate at the user's facility. This document does not apply to: - concentrates prepared from pre-packaged salts and water at a dialysis facility for use in that facility; - pre-packaged and sterile dialysis fluid; - sorbent dialysis fluid regeneration systems that regenerate and recirculate small volumes of the dialysis fluid; - equipment to perform patient treatment; this is addressed IEC 60601-2-16. This document does not cover the dialysis fluid that is used to clinically dialyse patients. Dialysis fluid is covered in ISO 23500-5. The making of dialysis fluid involves the proportioning of concentrate and water at the bedside or in a central dialysis fluid delivery system. Although the label requirements for dialysis fluid are placed on the labelling of the concentrate, it is the user's responsibility to ensure proper use.

Obsah

ČSN EN 549+A2 Tento dokument specifikuje požadavky a související zkušební metody pro pryžové materiály používané v plynárenských zařízeních a plynových spotřebičích v kontaktu s hořlavými plyny první, druhé a třetí třídy, klasifikovanými v EN 437:2018, dále jsou pokryty LPG, biomethan a bio LPG, stejné kvality. Uvádí také klasi-fikaci založenou na teplotním rozsahu použití a na tvrdosti. Tento dokument je použitelný pro materiály, z nichž jsou vyrobena homogenní těsnění a homogenní nebo vyztužené membrány. Vzhledem k tomu, že se rozměry a tvar součástí liší od rozměrů a tvarů standardních zkušebních těles ode-braných z materiálu tvaru tenké desky, který se používá pro zkoušení typu pryžových materiálů podle tohoto dokumentu, byly v požadavcích specifikovaných v příloze A pro součásti uvedeny tolerance, specifikované pro standardní zkušební tělesa. Rozsah provozních teplot, pokrytých tímto dokumentem, je -40 °C až +150 °C. Pro aplikace s potenciální kondenzací není tento dokument použitelný pro silikonové pryže, např. při jmenovi-tém tlaku nad 200 hPa (200 mbar) nebo při teplotách pod 0 °C s plyny třetí třídy hořlavosti.

Obsah

ČSN EN 1751 (12 7030) This document specifies methods for the testing and rating of dampers and valves used in air distribution systems with pressure differences up to 2 000 Pa. The tests incorporated in this document will address: - leakage past a closed damper or valve (for classification, see Annex C); - casing leakage (for classification, see Annex C); - flow rate/pressure requirement characteristics; - torque: (see Annex A); - thermal transmittance: (see Annex B). The tests specified above are applicable to the following: - measurement of leakage past a closed damper or valve; - measurement of casing leakage; - determination of flow rate and pressure requirements; - measurement of torque characteristics (see Annex A); - measurement of thermal transfer characteristics to determine insulation properties (see Annex B). This document does not apply to the acoustic testing of dampers and valves. NOTE - Certain aspects of the dynamic performance of dampers and/or valves are dependent upon the air distribution system to which they are connected and are, therefore, difficult to measure in isolation. Such considerations have led to the omission of these aspects of the dynamic performance measurements from this document. Also, in common with other air distribution components, the results from tests carried out in accordance with this document might not be directly applicable if the damper or valve is situated in an area of non-uniform flow.

Obsah

ČSN ISO 6779 Tento dokument specifikuje, s odkazem na ISO 230-1, zkoušky geometrické přesnosti pro vnitřní protahovací stroje se svislou osou Z zajišťující hlavní řezný pohyb. Tento dokument také specifikuje aplikovatelné tolerance odpovídající shora zmíněným zkouškám pro normální přesnost svislého vnitřního protahovacího stroje. Tento dokument vysvětluje různé pojmy, nastavení a společné vlastnosti svislých vnitřních protahovacích strojů. Poskytuje také související terminologii a označení os. Tento dokument se zabývá pouze ověřením přesnosti protahovacího stroje. Tento dokument se nevztahuje na zkoušky činnosti stroje (např. vibrace, nadměrný hluk, trhavé pohyby komponentů) ani na vlastnosti stroje (např. rychlosti, posuvy), které by obecně měly být kontrolovány před zkouškami přesnosti.

Obsah

ČSN EN 17932 This document provides requirements for operation of vehicles that use liquefied natural gas (LNG) as a fuel for propulsion, covering various aspects of LNGV workshops including activities, risk management, planning, personnel, layout, systems and operations. It provides requirements regarding the management of LNGV including use, parking, fuelling for commissioning, inspection, installation, repair and maintenance, disposal, transportation and documentation. This document is applicable to the management of LNG vehicles.

Obsah

ČSN EN IEC 63281-2-1 Tato norma stanovuje požadavky na bezpečnost a zkušební metody pro osobní elektrické přepravní prostředky. Tento dokument platí pro elektricky poháněné osobní elektrické přepravní prostředky (PeT), které se používají v soukromých a veřejných prostorách, kde je ovládání rychlosti a/nebo řízení elektrické/elektronické. PeT může mít prostředky pro přepravu nákladu a může být pro soukromé nebo komerční použití (včetně služby sdílení).

Obsah

ČSN EN 50065-2-3 ed. 2 This document applies to electrical equipment using signals in the frequency range 3 kHz to 95 kHz to transmit or receive information on low voltage electrical systems, for electricity suppliers and distributors. Mains communicating equipment (MCE) may fall into one of the two following categories: - MCE implementing transmission or reception of information on LV distribution networks or installations of network users connected to the public electricity distribution network as the sole function. Immunity requirements for such equipment are entirely covered by this document; - MCE being equipment covered by the scope of other standards, integrating mains communication as one of their functions. In this case, only the immunity requirements for the mains communication function of such equipment are covered by the scope of this document. Immunity requirements for all other available functions of this equipment are covered by the relevant product standard or generic standard. The object of this document is to contribute to ensuring EMC in general. It specifies essential immunity requirements and test methods, including those tests which are to be performed during type-testing of MCE, for electromagnetic interference (EMI) generated on LV installations. It defines the methods and requirements for testing immunity of MCE on meeting the essential requirements of the EMCD. Test requirements are specified for each port considered. Furthermore, it provides guidelines for the assessment of the performance of the communication function of an MCE. Normative specifications are under consideration. This document gives immunity requirements which are applicable to MCE used by electricity suppliers and distributors (e.g. DSOs) for purposes like energy management and network monitoring and automation. The levels do not however cover extreme cases which could occur in any location but with a low probability of occurrence. In special cases situations will arise where the level of disturbances could exceed the levels specified in this document, e.g. where a hand-held transmitter is used in proximity of an apparatus. In these instances special mitigation measures might have to be employed. It does not specify immunity of MCE to signals from other MCE operating in the same nominal frequency band or immunity to signals originating from power line carrier systems operating on high or medium-voltage networks. Safety considerations are not included in this document.

Obsah

ČSN EN IEC 61755-3-2 ed. 2 Norma definuje rozměrové meze optického rozhraní, které jsou nezbytné pro konektory jednovidových vláken s cylindrickou zirkoniovou ferulí (ZrO2) o průměru 2,5 mm nebo 1,25 mm leštěnou v úhlu 8° pro splnění daných požadavků pro spojení vlákno-vlákno, jak je uvedeno v IEC 61755-2-2. Ferule vyrobené z materiálů uvedených v tomto dokumentu jsou vhodné pro použití ve všech provozních prostředích uvedených v IEC 61753-1. Rozměry a vlastnosti ferule jsou obsaženy v souboru norem IEC 61754 pro rozhraní optických konektorů.

Obsah

ČSN EN IEC 61755-3-1 ed. 2 Norma definuje rozměrové meze optického rozhraní, které jsou nezbytné pro konektory jednovidových vláken s cylindrickou zirkoniovou ferulí (ZrO2) o průměru 2,5 mm nebo 1,25 mm pro splnění daných požadavků pro spojení vlákno-vlákno, jak je uvedeno v IEC 61755-2-1. Ferule vyrobené z materiálů uvedených v tomto dokumentu jsou vhodné pro použití ve všech provozních prostředích uvedených v IEC 61753-1. Rozměry a vlastnosti ferule jsou obsaženy v souboru norem IEC 61754 pro rozhraní optických konektorů.

Obsah

ČSN EN 12201-2 Tento dokument specifikuje vlastnosti trubek z polyethylenu (PE) uložených v zemi i nadzemní, určených pro rozvody vody pro lidskou spotřebu i pro rozvody surové vody před úpravou a dále pro tlakové kanalizační přípojky a stokové sítě, pro podtlakové odpadní systémy a pro rozvody vody pro další účely, s výjimkou průmyslového použití. Uvádí zkušební metody a požadavky pro rozměry a vlastnosti trubek a jejich značení.

Obsah

ČSN EN ISO 23581 This document specifies a procedure for the determination of kinematic viscosity, by calculation from dynamic viscosity, and density, of both transparent and opaque liquid petroleum products and crude oils using the Stabinger type viscometer. The result obtained using the procedure described in this document depends on the rheological behaviour of the sample. This document is predominantly applicable to liquids whose shear stress and shear rate are proportional (Newtonian flow behaviour). If the viscosity changes significantly with the shear rate, comparison with other measuring methods is not possible except at similar shear rates. The precision has been determined only for the materials, density ranges and temperatures described in Clause 13. The test method can be applied to a wider range of viscosity, density, temperature and materials. It is possible that the precision and bias are applicable for materials which are not listed in Clause 13.

Obsah

ČSN EN ISO 11890-1 This document is part of the ISO 11890 series, dealing with the sampling and testing of coating materials and their raw materials. This document is applicable to the determination of volatile organic compound (VOC) content in the following cases: - case 1: where there are single-pack coating materials other than case 3, and the expected VOC content is greater than a mass fraction of 5 %, including single-pack coating materials cure not through chemical reactions and single-pack coating materials which cannot be measured by ISO 11890-2 due to chemical cure reactions or gas chromatography temperatures leading to formation of new compounds that would not appear under normal cure conditions and impacts VOC/SVOC calculation.; - case 2: where there are multi-pack coating materials other than case 3 and the expected VOC content is greater than a mass fraction of 1 %; - case 3: where there are radiation curable coating materials, and the expected VOC content is greater than a mass fraction of 5 %. Radiation curable coating materials in this document include coating materials that are cured by UV, electron beam, and other radiation methods. If the system of the first case contains SVOC, but do not cure through chemical reactions, the VOC result can be influenced by SVOC, see Annex C. In this case, ISO 11890-2 is preferred. ISO 11890-1 cannot be used for the determination of the SVOC content. In water-borne coating materials, that do not cure through chemical reactions, if the water content is much greater than VOC content and VOC content is less than a mass fraction of 10 %, ISO 11890-2 is preferred. For all three cases, the main purpose measured is VOC. However, clarify that this VOC content can also contain SVOC. The real VOC content can be lower than the VOC content measured by ISO 11890-1. The method specified in this document assumes that the volatile matter is either water or organic. However, it is possible that other volatile inorganic compounds are present which can require another suitable method for quantification, which is thus allowed for in the calculations. The method defined in this document is not applicable for determination of water content.