Normy

Obsah

ČSN EN ISO 11665-7 This part of ISO 11665 gives guidelines for estimating the radon-222 surface exhalation rate over a short period (a few hours), at a given place, at the interface of the medium (soil, rock, laid building material, walls, etc.) and the atmosphere. This estimation is based on measuring the radon activity concentration emanating from the surface under investigation and accumulated in a container of a known volume for a known duration. This method is estimative only, as it is difficult to quantify the influence of many parameters in environmental conditions. This part of ISO 11665 is particularly applicable, however, in case of an investigation, a search for sources or a comparative study of exhalation rates at the same site. This part of ISO 11665 does not cover calibration conditions for the rate estimation devices. The measurement method described is applicable for radon exhalation rates greater than 5 mBq/m2/s.

Obsah

ČSN EN 10303 This European Standard defines the grades of thin non-oriented magnetic steel strip and sheet in nominal thicknesses of 0,05 mm, 0,10 mm, 0,15 mm, 0,20 mm, 0,25 mm, 0,27 mm, 0,30 mm and 0,35 mm, and of thin grain-oriented magnetic steel strip and sheet in nominal thicknesses of 0,05 mm, 0,10 mm, 0,15 mm and 0,18 mm. In particular, it gives general requirements, magnetic properties, geometric characteristics and tolerances and technological characteristics, as well as inspection procedure. This European Standard applies to magnetic steel strip and sheet supplied in the finally annealed condition in coils and intended for the construction of magnetic circuits used at frequencies equal to or higher than 100 Hz.

Obsah

ČSN EN ISO 16230-1 This part of ISO 16230 is applicable to tractors and self-propelled ride-on machines, mounted implements, and towed implements used in agriculture and forestry. This part of ISO 16230 specifies general requirements that relate to the protection and safety of operators and bystanders on machines with onboard voltages in the range of 50 V AC to 1000 V AC and 75 V DC to 1500 V DC. This part of ISO 16230 applies to electrical equipment and parts of the electrical equipment on such machines and includes general requirements related to the protection and safety of operators, bystanders, and first responders. This part of ISO 16230 deals with significant hazards, hazardous situations, and events, as listed in Annex A, relevant to this agricultural machinery when used as intended and under the conditions of misuse foreseeable by the manufacturer during normal operation and service. This part of ISO 16230 is not applicable to the following: - specific design elements of external interfaces (e.g. the interface between a tractor and implement); - externally powered equipment (e.g. line powered equipment, equipment without on-board power generation); - purpose built forestry machines; - stationary electrical generators. This part of ISO 16230 is not applicable to machines which are manufactured before the date of its publication.

Obsah

ČSN EN ISO 18743 This International Standard specifies a method of detection of Trichinella spp. muscle stage larvae in meat of individual animal carcasses intended for human consumption. It is applicable to the examination of meat from domestic and sylvatic animal species, which can be infected by nematodes of the genus Trichinella. This method does not allow the identification of the species or genotype of detected parasites; species or genotype identification can be carried out by molecular methods. The method described in this International Standard is intended to be used in conjunction with the guidelines in the OIE Manual of Diagnostic Tests and Vaccines and by the International Commission on Trichinellosis (ICT) for Trichinella testing and the inspection of carcasses intended for human consumption, unless it has been demonstrated by other means that the animal was not at risk for exposure to Trichinella. The artificial digestion/magnetic stirrer method is considered to be the standard method because it has proven to give the most reliable results in validation studies.

Obsah

ČSN EN ISO 21029-2 This part of ISO 21029 specifies operational requirements for transportable vacuum insulated cryogenic vessels of not more than 1 000 l volume designed to operate above atmospheric pressure. Appropriate parts may be used as a guidance for a vessel design to operate open to the atmosphere. For cryogenic vessels designed for personal medical use, other requirements can apply. The scope includes putting into service, filling, withdrawal, transport within the location, storage, maintenance, periodic inspection, and emergency procedures. For the transportation of these vessels by public road, rail, sea, and air, other additional requirements can apply; these are defined in specific regulations. Transportable cryogenic vessels of not more than 1 000 l volume are often partly equipped by the manufacturer, but can be installed or re-installed by another party, such as the operator or owner. For this reason, some of the scope of this part of ISO 21029, which includes putting into service, inspection, filling, maintenance, and emergency procedure, overlaps with ISO 21029 1.

Obsah

ČSN P CEN/TS 16272-7 The purpose of insertion loss measurements is to have an indication of the "efficiency" of the complete installation in attenuating noise from a technical point of view, as is usually done with calculations. The insertion loss is not intended to compare products; in fact, it is site-dependent, so that the same product may give different results when installed on different sites. In order to be representative, these measurements need to be done in well-defined conditions regarding: - the noise source (number and type of trains, speed, etc.); - the meteorological window; - the measurement time; - the reference time, i.e. the time over which the measured insertion loss is evaluated based on the measurement results. When it is not possible to carry out measurements before the construction of the noise barrier, an "equivalent" site is used for the "before" measurements. The assessment of insertion loss limiting values is out of the scope of this Technical Specification.

Obsah

ČSN EN ISO 17937 This International Standard specifies requirements and their test methods for osteotomes used in dentistry for bone compaction, internal sinus floor elevation, and jaw bone cleaving. It also specifies the requirements for their marking and labelling.

Obsah

ČSN EN ISO 6874 This International Standard specifies requirements and test methods for polymer-based materials intended for sealing pits and fissures in teeth. This International Standard covers both self-curing and external-energy-activated materials.

Obsah

ČSN EN ISO 13356 This International Standard specifies the requirements and corresponding test methods for a biocompatible and biostable ceramic bone-substitute material based on yttria-stabilized tetragonal zirconia (yttria tetragonal zirconia polycrystal, Y-TZP) for use as a material for surgical implants.

Obsah

ČSN EN ISO 17641-2 Norma specifikuje požadované vzorky, rozměry zkušebního kusu a postupy pro provedení zkoušek praskavosti za horka s vlastní tuhostí. Popsány jsou následující zkoušky - Zkouška praskavosti svaru na T-spoji, Zkouška tahem svarového kovu a Podélná zkouška lámavosti. Zkoušky jsou navrženy k získání údajů o náchylnosti svarových kovů k praskavosti za horka. Tyto zkoušky nejsou vhodné pro hodnocení základních materiálů. Norma se používá především pro svarové kovy z plně austenitických korozivzdorných ocelí; niklu, na bázi niklu a svarové kovy ze slitin niklu s mědí. Norma může být rovněž použita pro jiné svarové kovy. Norma popisuje pouze provedení zkoušek a protokol s výsledky. Neuvádí jakákoliv kritéria přípustnosti.

Obsah

ČSN EN 62841-2-14 Tato část IEC 62841 platí pro hoblíky.

Obsah

ČSN EN ISO 21415-2 This part of ISO 21415 specifies a method for determining the content of wet gluten and the gluten index for wheat flours (Triticum aestivum L. and Triticum durum Desf.) by mechanical means. This method is directly applicable to flours. It also applies to common and durum wheat after grinding, if their particular size distribution meets the specification given in Table B.1.