Normy

Obsah

ČSN EN IEC 60645-6 ed. 2 Tato část normy platí pro přístroje navržené primárně k měření otoakustických emisí ve zvukovodu zevního ucha člověka evokovaných akustickými podněty pomocí sondy. Tento dokument definuje vlastnosti, které mají být stanoveny výrobcem, stanovuje minimální povinné funkce pro dvě třídy přístrojů a uvádí provozní technické specifikace platné pro obě třídy přístrojů. Tento dokument popisuje metody, které se používají k prokázání shody s technickými požadavky uvedenými v tomto dokumentu, a návod k metodám periodické kalibrace. Účelem tohoto dokumentu je zajistit, aby měření prováděná za srovnatelných podmínek vyšetření s různými přístroji, které vyhovují požadavkům normy, byla slučitelná. Přístroje mohou být vybaveny měřicími funkcemi, které specificky nespadají do rozsahu platnosti tohoto dokumentu, a stále ještě mohou vyhovovat důležitým požadavkům tohoto dokumentu pro funkce, které jsou v rozsahu platnosti. Záměrem tohoto dokumentu není omezení vývoje nebo zabudování nových funkci, ani odrazení od inovačních přístupů.

Obsah

ČSN EN ISO 638-1 This document specifies an oven-drying method for the determination of the dry matter content in paper, board, pulp and cellulosic nanomaterials in solid form, which all can be produced from virgin and /or recycled materials. It is also applicable to the determination of the dry matter content of paper and board for recycling. The procedure is applicable to paper, board, and pulp and cellulosic nanomaterials which do not contain any appreciable quantities of materials other than water that are volatile at the temperature of 105 °C ± 2 °C. It is used, for example, in the case of pulp, paper, and board and cellulosic nanomaterial samples taken for chemical and physical tests in the laboratory, when a concurrent determination of dry matter content is required. This method is not applicable to the determination of the dry matter content of slush pulp or to the determination of the saleable mass of pulp lots. NOTE 1 - ISO 638-2[1] specifies an oven-drying method for the determination of the dry matter content of suspensions of cellulosic nanomaterials, ISO 287[2] specifies the determination of the moisture content of a lot of paper and board; ISO 4119[3] specifies the determination of stock concentration of pulps; the ISO 801 series[4] specifies the determination of the saleable mass in lots. NOTE 2 - This document determines the total dry matter content of the sample, including any dissolved solids. If only the cellulosic material content free of dissolved solids is desired, dissolved solids are removed prior to measuring the dry matter content, e.g. by washing or dialysis, taking care to retain all cellulosic material; in cases where the sample is filterable without loss of cellulosic solids, ISO 4119[3] can be used to determine the stock consistency (content of cellulosic material in solid form).

Obsah

ČSN EN ISO 638-2 This document specifies an oven-drying method for the determination of the dry matter content in suspensions of cellulosic nanomaterials. The procedure is applicable to cellulosic nanomaterial suspensions which do not contain any appreciable quantities of materials other than water that are volatile at the temperature of 105 °C ± 2 °C. It is used, for example, in the case of cellulosic nanomaterial suspensions samples taken for chemical and physical tests in the laboratory, when a concurrent determination of dry matter content is required. NOTE - This document determines the total dry matter content of the sample, including any dissolved solids. If only the cellulosic material content free of dissolved solids is desired, dissolved solids are removed prior to measuring the dry matter content, e.g. by washing or dialysis, taking care to retain all cellulosic material.

Obsah

ČSN EN ISO 4671 This document specifies methods of measuring the inside diameter, outside diameter (including diameter over reinforcement of hydraulic hoses), wall thickness, concentricity and lining and cover thickness of hoses, methods of measurement and identification of the lengths of hoses and hose assemblies, and a method of verifying the through-bore of hydraulic hose assemblies.

Obsah

ČSN EN ISO 11357-7 This document specifies two methods (isothermal and non-isothermal) for studying the crystallization kinetics of partially crystalline polymers using differential scanning calorimetry (DSC). It is only applicable to molten polymers. These methods are not suitable if the molecular structure of the polymer is modified during the test.

Obsah

ČSN P CEN/TS 17176-3 This document specifies the characteristics of solid-wall oriented unplasticized poly(vinyl chloride) (PVC-O) fittings for piping systems intended for water supply and for buried drainage, sewerage, treated waste water and irrigation under pressure or above-ground where protected from direct sunlight. The scope of this document is limited to double sockets, repair couplings, reducers and to non-end load bearing elbows. NOTE 1 - The scope of this document is restricted to fittings on the market during the preparation of this document. Therefore, tees, flange adaptors, etc., are excluded from this version of the standard. NOTE 2 - For double sockets, repair couplings and reducers there are no special fittings designs for end-load bearing applications. However, restrained gaskets can be used for end-load bearing applications. In that case, the requirements of EN 17176-5 are applicable. It also specifies the test parameters for the test methods referred to in this document. In conjunction with EN 17176-1 and EN 17176-5, this document is applicable to oriented PVC-O fittings intended to be used for the following: a) water mains and services lines; b) conveyance of water for both outside and inside buildings; c) drainage, sewerage and treated waste water under pressure; d) irrigation under pressure. This document is applicable to piping systems intended for the supply of water with a maximum allowable operating pressure (PFA) up to and including 25 bar1. The piping system according to this document is intended for the conveyance of cold water up to and including 45 °C and especially in those applications where special performance requirements are needed, such as impact loads and pressure fluctuations. For temperatures between 25 °C and 45 °C, EN 17176-2:2019, Figure C.1 applies. This document specifies a range of fittings sizes and pressure classes and gives a requirement and recommendations concerning colours. NOTE 3 - It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.

Obsah

ČSN EN 16734 Tento dokument určuje technické požadavky a metody zkoušení prodávaných a dodávaných motorových naft B10, tj. motorových naft obsahující až 10,0 % (V/V) methylesterů mastných kyselin (FAME). Platí pro palivo pro použití v motorových vozidlech se vznětovými motory, které jsou určeny pro provoz s motorovou naftou B10.

Obsah

ČSN EN ISO 18754 This document specifies methods for the determination of the apparent solid density, bulk density, apparent porosity and geometric bulk density of fine ceramics, including all ceramic matrix composites. Two methods are described and are designated as Methods A and B, as follows: - Method A: Determination of bulk density, apparent solid density and apparent porosity by liquid displacement (Archimedes' method). - Method B: Determination of bulk density only, by measurement of geometric dimensions and mass

Obsah

ČSN EN ISO 19629 This document describes the flash method for the determination of thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement. In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are defined such that the material behaves in a homogeneous manner. This involves performing tests in one symmetry axis of the composite. The method is applicable to materials which are physically and chemically stable during the measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the measurement of thermal diffusivity values in the range 10-4 m2.s-1 to 10-7 m2.s-1.

Obsah

ČSN ISO 18065 Tento dokument stanovuje požadavky na turistické služby poskytované přímo správami přírodních chráněných území s cílem uspokojit návštěvníky, a přitom upřednostňovat cíle ochrany přírodních chráněných území, s výjimkou chráněných mořských území. POZNÁMKA - Tato přírodní chráněná území mohou být spravována veřejně nebo soukromě, komunitou nebo nevládními organizacemi nebo mohou být spravována kombinací některých nebo všech těchto možností.

Obsah

ČSN EN ISO 20126 This document specifies requirements and test methods for the physical properties of manual toothbrushes in order to promote the safety of these products for their intended use. This document does not specify any requirements and test methods for the physical properties of toothbrushes for which all the cleaning elements in the head are elastomer. This document does not apply to manual single tuft toothbrushes, single use, interdental and powered oral hygiene devices. These types of oral hygiene products are evaluated for their safety in-use by appropriate test methods or clinical trials. In addition, for the filaments end-rounding requirements, this document does not apply to particular filament types which are very thin (less than 0,1 mm outside diameter) or have no sharp edges (e.g. tapered, feathered, with split tips, or spherical cap) or non-synthetic filaments, where applying end-rounding process is inappropriate or impossible. These types of manual toothbrushes are evaluated for their safety in-use by appropriate test methods or clinical trials appropriately.

Obsah

ČSN EN ISO 8536-15 This document specifies the requirements for infusion sets for single use that use light-protective agents in the fluid path materials (henceforth abbreviated as "light-protective infusion sets"). This document also provides guidelines for performance and quality specifications of materials used in light-protective infusion sets.