Normy

Obsah

ČSN EN 196-1 Tato část normy EN 196 určuje metodu pro stanovení pevnosti v tlaku a případně pevnosti v tahu za ohybu cementové malty. Tato metoda platí pro cementy pro obecné použití a ostatní cementy a materiály, jejichž normy se na tuto metodu odkazují. Nemusí být použitelná pro jiné cementy, které mají například velmi krátký počátek tuhnutí. Metoda slouží pro posouzení, zda pevnost cementu v tlaku je ve shodě s jeho specifikací a pro posouzení vhodnosti normalizovaného písku CEN, EN 196-1 nebo alternativního zhutňovacího zařízení. Norma popisuje referenční zkušební zařízení i postup a umožňuje použití alternativního zhutňovacího zařízení a postupů, které mohou být použity za předpokladu, že jejich vhodnost byla posouzena podle příslušných ustanovení tohoto dokumentu. Ve sporném případě se použije jen referenční zkušební zařízení a postup.

Obsah

ČSN EN ISO 13383-1 This part of EN ISO 13383 describes manual methods of making measurements for the determination of grain size of fine ceramics (advanced ceramics, advanced technical ceramics) using photomicrographs of polished and etched test pieces. The methods described in this part do not yield the true mean grain diameter, but a somewhat smaller parameter depending on the method applied to analyse a twodimensional section. The relationship to true grain dimensions depends on the grain shape and the degree of microstructural anisotropy. This part contains two principal methods, A and B. Method A is the mean linear intercept technique. Method A1 applies to single-phase ceramics, and to ceramics with a principal crystalline phase and a glassy grain-boundary phase of less than about 5 % by volume for which intercept counting suffices. Method A2 applies to ceramics with more than about 5 % by volume of pores or secondary phases, or ceramics with more than one major crystalline phase where individual intercept lengths are measured, which can optionally be used to create a size distribution. This latter method allows the pores or phases to be distinguished and the mean linear intercept size for each to be calculated separately. Method B is the mean equivalent circle diameter method, which applies to any type of ceramic with or without a secondary phase. This method may also be employed for determining grain aspect ratio and a size distribution. Some users of this part of ISO 13383 may wish to apply automatic or semiautomatic image analysis to micrographs or directly captured microstructural images. This is permitted by this part provided that the technique employed simulates the manual methods (see Clause 4 and 8.4).

Obsah

ČSN EN ISO 22155 This International Standard specifies a static headspace method for quantitative gas chromatographic determination of volatile aromatic and halogenated hydrocarbons and selected aliphatic ethers in soil. This International Standard is applicable to all types of soil. The limit of quantification is dependent on the detection system used and the quality of the methanol grade used for the extraction of the soil sample. Under the conditions specified in this International Standard, the following limits of quantifications apply (expressed on basis of dry matter). Typical limit of quantification when using GC-FID: - volatile aromatic hydrocarbons: 0,2 mg/kg; - aliphatic ethers as methyl tert.-butyl ether(MTBE) and tert.-amyl methyl ether (TAME): 0,5 mg/kg. Typical limit of quantification when using GC-ECD: - volatile halogenated hydrocarbons: 0,01 mg/kg to 0,2 mg/kg. Lower limits of quantification for some compounds can be achieved by using mass spectrometry (MS) with selected ion detection (see Annex D).

Obsah

ČSN EN ISO 15009 This International Standard specifies a method for quantitative gas-chromatographic determination of volatile aromatic hydrocarbons, naphthalene and volatile halogenated hydrocarbons in soil. This International Standard is applicable to all types of soil. NOTE: In the case of unsaturated peaty soils, absorption of the extraction solution may occur. The lower limit of quantification is dependent on the equipment used and the quality of the methanol grade used for the extraction of the soil sample. Under the conditions specified in this International Standard the following limits of quantification apply (expressed on basis of dry matter): Typical limit of quantification when using GC-FID: - Volatile aromatic hydrocarbons: 0,1 mg/kg Typical limit of quantification when using GC-ECD: - Volatile halogenated hydrocarbons: 0,01 mg/kg Lower limits of quantification for some compounds can be achieved by using mass spectrometry (MS) with selected ion detection.

Obsah

ČSN EN ISO 5360 This International Standard specifies requirements, including dimensions, for agent-specific filling systems for agent-specific anaesthetic vaporizers. This International Standard does not specify construction materials. NOTE 1 - For recommendations on materials, see Annex A. Because of the unique properties of desflurane, dimensions for this agent have not been specified in this International Standard. NOTE 2 - Designs of connection systems, which only permit engagement of the agent-specific bottle adaptor to the bottle when the bottle collar is in place, are encouraged.

Obsah

ČSN ETSI EN 300 065 V2.1.2 The present document states the minimum requirements for a Narrow-Band Direct-Printing (NBDP) maritime receiver operating in the NAVTEX system. The equipment's function is to receive, display and/or print automatically and continuously, meteorological and navigational messages and Search And Rescue (SAR) messages transmitted by coast stations participating in the NAVTEX system. The present document also specifies technical characteristics, methods of measurement and required test results. The present document contains requirements to demonstrate that "... Radio equipment shall be so constructed that it both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference" [i.4] and that "....radio equipment supports certain features ensuring access to emergency services" [i.4]. In addition to the present document, other ENs that specify technical requirements in respect of essential requirements under other parts of article 3 of the Radio Equipment Directive [i.4] may apply to equipment within the scope of the present document.

Obsah

ČSN ETSI EN 301 843-1 V2.1.1 The present document contains the common requirements for marine radio communications equipment and associated ancillary equipment, in respect of ElectroMagnetic Compatibility (EMC). The provisions of the present document apply to marine radio equipment not covered in the scope of the Council Directive on marine equipment (the "Marine Equipment Directive" 96/98/EC [i.5]). Product dependent arrangements necessary to perform the EMC tests on dedicated types of marine radio communications equipment, and the assessment of test results, are detailed in the appropriate product related parts of the present document. The present document, together with the product related part, specifies the applicable EMC tests, the methods of measurement, the limits and the performance criteria for marine radio equipment and associated ancillary equipment. In case of differences (for instance concerning special conditions, definitions, abbreviations) between the present document and the relevant product related part of the present document, the product related part takes precedence. For the further content of the present document, the expression "radio equipment" is taken to mean marine radio communications equipment, in each individual case. Technical specifications related to the antenna port of radio equipment and emissions from the enclosure port of radio equipment and combinations of radio and associated ancillary equipment are not included in the present document. Such technical specifications are normally found in the relevant product standards for the effective use of the radio spectrum. The environment classification used in the present document is maritime, as defined in CENELEC EN 60945 [1]. Marine radio communications equipment meeting the EMC requirements set out in CENELEC EN 60945 [1] is deemed to meet also the EMC requirements for the residential, commercial and light industrial environment as defined in CENELEC EN 61000 6 3 [i.1] and CENELEC EN 61000-6 1 [i.2]. The EMC requirements have been selected to ensure an adequate level of compatibility for apparatus intended to be used in the maritime environment. The levels, however, do not cover extreme cases which may occur in any location but with low probability of occurrence. Compliance of radio equipment to the requirements of the present document does not signify compliance to any requirements related to spectrum management or to the use of the equipment (licensing requirements). Compliance to the requirements of the present document does not signify compliance to any safety requirements. However, it is the responsibility of the assessor of the equipment to record in the test report any observations regarding the test sample becoming dangerous or unsafe as a result of the application of the tests called for in the present document. The present document contains requirements to demonstrate an adequate level of electromagnetic compatibility as set out in Directive 2014/30/EU. In addition to the present document, other ENs that specify technical requirements in respect of essential requirements under other parts of article 3 of the Radio Equipment Directive [i.4] may apply to equipment within the scope of the present document.

Obsah

ČSN EN ISO 16148 Tato mezinárodní norma uvádí postupy pro použití zkoušení akustickou emisí a následné zkoušení ultrazvukem v průběhu periodické kontroly a zkoušení bezešvých ocelových lahví a velkoobjemových lahví na stlačené a zkapalněné plyny s vodním objemem do 3 000 litrů. Toto zkoušení poskytuje indikace a lokalizace zdrojů akustické emise, které se vyhodnocují zkouškou ultrazvukem z hlediska možné vady na lahvi nebo na velkoobjemové lahvi. Jiné metody než zkoušení ultrazvukem pro sekundární přezkoušení nejsou předmětem této mezinárodní normy. Tato mezinárodní norma neplatí pro kompozitové lahve.

Obsah

ČSN EN 61249-2-44 This part of IEC 61249 gives requirements for properties of non-halogenated epoxide non-woven reinforced core/woven E-glass reinforced surface laminate sheets of defined flammability (vertical burning test), copper-clad for lead-free assembly in thicknesses of 0,60 mm up to 1,70 mm. The flammability rating is achieved through the use of non-halogenated fire retardants reacted as part of the epoxide polymeric structure. The glass transition temperature is defined to be 105 °C minimum. Some property requirements may have several classes of performance. The class desired should be specified on the purchase order, otherwise the default class of material will be supplied.

Obsah

ČSN EN 61249-2-43 This part of IEC 61249 gives requirements for properties of non-halogenated epoxide cellulose paper reinforced core/woven E-glass reinforced surface laminate sheets of defined flammability (vertical burning test), copper-clad for lead-free assembly in thicknesses of 0,60 mm up to 1,70 mm. The flammability rating is achieved through the use of non-halogenated fire retardants reacted as part of the epoxide polymeric structure. The glass transition temperature is defined to be 100 °C minimum. Some property requirements may have several classes of performance. The class desired should be specified on the purchase order, otherwise the default class of material will be supplied.

Obsah

ČSN EN 10305-1 Norma stanovuje technické dodací podmínky pro ocelové bezešvé trubky tažené za studena kruhového průřezu pro přesné použití s předepsaným vnějším průměrem D

Obsah

ČSN EN 902 This European Standard is applicable only to hydrogen peroxide and not to mixtures with other chemicals used for treatment of water intended for human consumption. It describes the characteristics of hydrogen peroxide and specifies the requirements and the corresponding test methods for hydrogen peroxide. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use (see Annex B).