Normy

Obsah

ČSN EN 12697-55 Tento dokument definuje tři postupy pro vyhodnocení kompatibility vstupních materiálů asfaltové směsi s asfaltovou emulzí. Tyto organoleptické zkoušky mohou být společně použity k vyhodnocení kompatibility vstupních materiálů při ručním míchání směsi pro daný typ emulze a obsah vody: - Metoda A popisuje zkušební postup pro vizuální posouzení stupně obalení; - Metoda B popisuje zkušební postup ke stanovení konzistence; - Metoda C popisuje zkušební postup ke stanovení hydrických vlastnostíNP1). Tento dokument se vztahuje na směsi připravené v laboratoři nebo odebrané na obalovně.

Obsah

ČSN EN 12697-56 Tento dokument definuje metodu pro hutnění válcových zkušebních těles asfaltových směsí, které se použijí pro následné zkoušení. Daný materiál asfaltové směsi je hutněn ve válcové formě působením statického zatížení na horní a dolní část zkušebního tělesa.

Obsah

ČSN EN ISO 12945-4 Tento dokument specifikuje metodu pro vizuální hodnocení žmolkování, rozvláknění a viditelných změn povrchu u plošných textilií. Tato metoda je vhodná pro většinu tkaných a pletených plošných textilií, včetně počesaných plošných textilií (rouna, vložkové textilie).

Obsah

ČSN EN 352-10 This document is applicable to entertainment audio earplugs. It specifies requirements on construction, design, performance, marking and user information relating to the inclusion of the entertainment audio facility. Entertainment audio earplugs use a wired or wireless system through which audio entertainment can be relayed. They may incorporate a radio receiver set or music player for entertainment or allow audio input from external devices. They also offer the possibility to communicate warning signals or messages. The product standards impose a limitation on the reproduced sound pressure level at the ear. The entertainment audio signal can be transmitted by radio (broadcast or local plant programmes) or by wire or other communication like Bluetooth.

Obsah

ČSN EN 352-4 ed. 2 This document is applicable to level-dependent earmuffs. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the level-dependent functionality. Level-dependent earmuffs are designed to provide restoration of external sounds, while providing attenuation of sounds at high levels. They may be selected for use in intermittent or impulsive noise environments and where external warning sounds are required to be heard. This document is concerned with those earmuffs having an electronic sound restoration circuit.

Obsah

ČSN EN 352-5 ed. 2 This document is applicable to active noise reduction (ANR) earmuffs. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the active noise reduction facility. Active noise reduction earmuffs are designed to provide additional attenuation of external sounds by means of a noise cancellation circuit. This additional attenuation is usually provided at low and mid frequencies. They may be selected for use in low frequency dominated high noise environments.

Obsah

ČSN EN 352-6 ed. 2 This document is applicable to earmuffs supplemented by a safety-related audio input. The audio signal can be transmitted by electrical input or other communication like Bluetooth. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the safety-related audio input. Earmuffs with safety-related audio input are designed to provide speech information and warning signals, while providing attenuation of external sound. They may be selected for use in a number of different environments, for example in air traffic communication, in the police forces, in the broadcasting and entertainment industries.

Obsah

ČSN EN 352-8 ed. 2 This document is applicable to entertainment audio earmuffs. It specifies requirements on construction, design, performance, marking and user information relating to the inclusion of the entertainment audio facility. Entertainment audio earmuffs use a wired or wireless system through which audio entertainment can be relayed. They may incorporate a radio receiver set or music player for entertainment or allow audio input from external devices. They also offer the possibility to communicate warning signals or messages. The product standards impose a limitation on the reproduced sound pressure level at the ear. The entertainment audio signal can be transmitted by radio (broadcast or local plant programmes) or by wire or other communication like Bluetooth.

Obsah

ČSN EN 352-9 This document is applicable to earplugs supplemented by a safety-related audio input. The audio signal can be transmitted by electrical input or other communication like Bluetooth1. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the safety-related audio input. Earplugs with safety-related audio input are designed to provide speech information and warning signals, while providing attenuation of external sound. They may be selected for use in a number of different environments, for example in air traffic communication, in the police forces, in the broadcasting and entertainment industries.

Obsah

ČSN EN 352-7 ed. 2 This document is applicable to level-dependent earplugs. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the level-dependent functionality. Level-dependent earplugs are designed to provide restoration of external sounds, while providing attenuation of sounds at high levels. They may be selected for use in intermittent or impulsive noise environments and where external warning sounds are required to be heard. This document is concerned with those earplugs having an electronic sound restoration circuit.

Obsah

ČSN EN ISO 9455-5 Tento dokument specifikuje kvalitativní metodu pro hodnocení agresivního působení tavidla na měď. Zkouška je použitelná pro všechna tavidla typu 1 podle ISO 9454-1.

Obsah

ČSN EN ISO 9455-9 Tento dokument specifikuje destilační metodu pro stanovení obsahu amoniaku v pevných, pastovitých nebo tekutých tavidlech. Metoda je použitelná pouze pro tavidla tříd 311 a 321 podle ISO 9454-1.