Normy

Obsah

ČSN EN IEC 60749-21 ed. 3 Tato norma definuje standardní postup pro stanovení pájitelnosti vývodů pouzder součástek, které mají být připojeny na jiný povrch olovnatou (SnPb), nebo bezolovnatou (Pb-free) pájkou. Tato zkušební metoda stanovuje postup pro stanovení pájitelnosti metodou "ponoř a prohlédni", která je použitelná pro součástky montované do průchozích otvorů, pro součástky s axiálními vývody a pro povrchově montované součástky (SMD), stejně jako volitelný postup pro zkoušku zjišťování pájitelnosti desky pro SMD za účelem umožnění simulace pájecího procesu, který je použit při montáži součástky. Tato zkušební metoda také stanovuje volitelné podmínky v případě stárnutí. Tato zkouška je považována za destruktivní, není-li v příslušné specifikaci uvedeno jinak. Poznámka 1 - Tato zkušební metoda nevyhodnocuje efekt teplotních namáhání, která se mohou objevit během pájecího procesu. Více podrobných informací lze nalézt v IEC 60749-15 nebo IEC 60749-20. Poznámka 2 - Upřednostňuje-li se kvalitativní zkušební metoda, lze zkušební metodu smáčecích vah nalézt v normě IEC 60068 2 69.

Obsah

ČSN EN IEC 61757-8-1 Norma definuje terminologii, strukturu a metody měření optických tlakových senzorů pro plyny nebo kapaliny, založených na membráně v kombinaci s Braggovými mřížkami (FBG) jako snímacím prvkem. Norma také specifikuje nejvýznamnější vlastnosti a charakteristiky těchto optických tlakových senzorů a definuje postupy měření těchto vlastností a charakteristik.

Obsah

ČSN EN ISO 28017 This document specifies requirements for two types, seven classes and three grades of wire- or textile-reinforced dredging hoses with nominal sizes ranging from 100 to 1 300. Such hoses are suitable for the delivery or suction of seawater or freshwater mixed with silt, sand, coral and small stones with a specific gravity in the range from 1,0 to 2,3 at ambient temperature ranging from -10 °C to +40 °C or for low-temperature hoses (designated -LT) ranging from -20 °C to +40 °C. This document covers two types of hose, as follows: - type 1: floating type, for delivery only, which includes flotation material to give the hose buoyancy; - type 2: submarine type for delivery and suction.

Obsah

ČSN P CEN ISO/TS 23818-3 This document provides a scheme for the assessment of conformity of PVC-U products and assemblies for the rehabilitation of existing pipelines, in accordance with ISO 11300-3, and intended to be included in the manufacturer's quality plan as part of the quality management system and for the establishment of certification procedures.

Obsah

ČSN EN ISO 20427 This document specifies sample preparation methods to determine the size distribution of separate particles of a single pigment or extender, which is dispersed in a liquid by application of a standardized dispersion procedure, using an ultrasonic device, shaker device or wet jet mill. The sample preparation methods described are optimized for measurements carried out with a particle sizing technique based on sedimentation. This technique relies on particle migration due to gravitation or centrifugal forces and requires a density contrast between the particles and the liquid phase.

Obsah

ČSN EN 17160 This document defines Product Category Rules (PCR) providing guidelines and rules for developing a type III environmental declaration (as in EN 15804:2012+A2:2019) for ceramic tiles produced by extrusion and dry-pressing techniques, mainly used for internal and/or external floorings and walls coverings, facade cladding. The c-PCR: - define the indicators to be declared, information to be provided and the way in which they are collated and reported; - describe which stages of ceramic tiles' life cycle are considered in the EPD and which processes are to be included in the life cycle stages; - define rules for the development of scenarios; - include the rules for calculating the Life Cycle Inventory and the Life Cycle Impact Assessment underlying the EPD, including the specification of the data quality to be applied; - include the rules for reporting predetermined, environmental and health information, that is not covered by LCA for a ceramic tile, construction process and construction service where necessary; - define the conditions under which ceramic tiles can be compared based on the information provided by EPD; - include Annex A to Annex E in alignment to EN 15804:2012+A2:2019. This PCR is intended to be used for cradle to grave and module D assessment.

Obsah

ČSN EN 15664-1 This document specifies a procedure to determine the release of metals from metallic materials used in products intended to come into contact with drinking water . The test can be used for three purposes: a) To assess a material as a reference material for a new category of materials by metal release testing using the results of several investigations in different waters covering a broad range of water compositions. b) To assess a material for an existing category for approval by way of metal release testing using the water defined in part 2, which exhibited the highest metal release when the reference material of the category was tested. c) To obtain data on the interaction of local water with a material.

Obsah

ČSN EN 12255-7 This document of the EN 12255series specifies design principles and performance requirements for secondary and tertiary treatment of wastewater in biological fixed-film reactors at wastewater treatment plants for more than 50 PT. Its primary application is for wastewater treatment plants for the treatment of domestic and municipal wastewater. It can also be applied for biodegradable industrial wastewater. Biological fixed film reactors include rotating biological contactors (RBC), biological trickling reactors (BTR), moving bed biological reactors (MBBR), submerged medium reactors (SMR) and submerged media filters (SMF). Membrane bioreactors (MBR) and anaerobic processes are not within the scope. Some of the systems using fixed film bacteria are enhanced activated sludge systems (hybrid systems). For such systems, EN 12255-6 also applies. This document specifies fundamental information about typical systems and does not provide information about all available fixed film systems.

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ČSN EN 1420 This document specifies a procedure for obtaining a migration water to determine odour, flavour, colour and turbidity for products made from organic materials intended to come in contact with water for human consumption (drinking water) and used in piping and storage systems. Such products include pipes, tanks, reservoirs, fittings, ancillaries and their coatings both for site applied and factory-made products. This document is applicable to products to be used under various conditions for the transport, storage and distribution of water intended for human consumption and raw water used for the manufacture of water intended for human consumption. This document specifies a test method comprising a set of procedures. The use may be dependent on the relevant national regulations and/or the Commission Implementing Decision (EU) 2024/368.

Obsah

ČSN EN ISO 18739 This document defines terms and definitions used in the process chain for computer-aided design and computer-aided manufacturing (CAD/CAM) systems in dentistry. NOTE - See Annex A for a flow chart of the process chain.

Obsah

ČSN ETSI EN 303 940-1 V1.1.1 Tento dokument stanoví technické požadavky, meze a zkušební metody na bezpečnostní skenery pro provoz uvnitř budov pracující s milimetrovými vlnami (mmWave SSC, zařízení SSC) provozované v pásmu 69,8 GHz až 80,5 GHz. Provozní kmitočtový rozsah je rozdělen do dvou pásem a sice pásma 97 (od 69,8 GHz do 79,9 GHz) a pásma 99 (od 76,5 GHz do 80,5 GHz) jak je definováno v Rozhodnutí (EU) 2025/105 [i.8]. Podrobnosti o zařízení mmWave SSC a souvisící klasifikace jsou blíže popsány v článku 4.2. POZNÁMKA - Vztah mezi tímto dokumentem a základními požadavky článku 3.2 Směrnice 2014/53/EU [i.1] je uveden v příloze A.

Obsah

ČSN EN 62297-1 Tato část IEC 62297 specifikuje schéma použití spouštění informací vysílaných od poskytovatele služeb televizního vysílání jako části dat vysílání, určených k řízení aplikace v přijímači. Norma specifikuje formát zprávy a požadavky, které je třeba splnit.