Normy

Obsah

ČSN EN ISO 23157 This document specifies a method for the determination of the silanol group content on the surface of fumed silica by reaction gas chromatographic method.

Obsah

ČSN EN ISO 7784-3 This document specifies a method for determining the resistance to abrasion of coatings, for which a loaded, rigid abrasive-paper covered wheel affects the coating of the linearly reciprocating test specimen.

Obsah

ČSN EN ISO 8872 This document specifies general requirements and test methods for aluminium caps and aluminium/plastic caps intended for use on infusion bottles and/or injection vials.

Obsah

ČSN EN ISO 29469 This document specifies the equipment and procedures for determining the compression behaviour of specimens. It is applicable to thermal insulating products and can be used to determine the compressive stress in compressive creep tests and for applications in which insulation products are exposed only to short-term loads. The method can be used for quality control purposes and can also be employed to obtain reference values from which design values can be calculated using safety factors.

Obsah

ČSN 75 5201 Tato norma platí pro navrhování a rekonstrukci úpraven vody (staveb pro úpravu vody), jejichž účelem je upravit vodu odebranou z přírodních i umělých zdrojů na vodu pitnou.

Obsah

ČSN EN ISO 20595 Tento dokument specifikuje metodu pro stanovení vybraných těkavých organických látek ve vodách. Tyto látky mimo jiné zahrnují těkavé halogenované uhlovodíky a složky benzínu (BTXE, TAME, MTBE a ETBE). Tato metoda se používá pro stanovení těkavých organických látek v pitné, podzemní a povrchové vodě a v čištěných odpadních vodách v hmotnostních koncentracích > 0,1 µg/l. Dolní mez použitelnosti závisí na jednotlivé látce, na hodnotě slepého stanovení a na matrici.

Obsah

ČSN EN ISO 11644 This document specifies a method for measuring the adhesion of the finish to leather or the adhesion between two adjacent layers of the finish. The method is valid for all finished flexible leathers with a smooth surface that can be bonded to an adherent plate without the adhesive penetrating into the finish. Preliminary experiments can be necessary to determine whether these conditions are met. This test method applies to finished leathers with a thick finish-coat. The method specified in this document does not apply to unpigmented articles or articles without a continuous coating layer, such as: - nubuk; - aniline; - pull-up; - suede; - perforated leather.

Obsah

ČSN EN ISO 7906 This document specifies general principles on colour fastness evaluation tests for leather. Procedures included in this document are common to most of the fastness test methods. This document provides a common basis for testing and reporting colour fastness. The uses and limitations of the methods are pointed out, several terms are defined, an outline of the drafting of the methods is given and the contents of the clauses describing the methods are discussed. Procedures common to a number of the methods are discussed briefly. Colour fastness means the resistance of the colour to the different agents to which these materials can be exposed during manufacture and their subsequent use. The change in colour of leather and staining of undyed adjacent fabrics or other materials are assessed as fastness ratings. Other visible changes in the leather under test, for example surface appearance, change in gloss or shrinkage, are considered as separate properties and reported as such. The leather fastness test methods can be used not only for assessing leather and related materials, such as coated leather and leather board, but also for the eventual assessment of the colour fastness of leather dyes. When such a method is so used, the dye is applied to a specified retanned leather or crust leather in defined depths of colour by stated procedures and the material is then tested in the usual way.

Obsah

ČSN EN 17656 This document supplements the requirements of EN ISO/IEC 17043 by providing clarification and additional information for proficiency testing schemes for emission measurements. It gives specific requirements for: - competence of proficiency testing providers; - proficiency testing facility characteristics; and - design, operation and evaluation of proficiency testing schemes by means of interlaboratory comparisons. All these aspects are necessary in order to organize and conduct proficiency testing on emission measurements. Requirements on the competence of proficiency testing providers cover personnel, organisation, equipment and environment. Requirements on the proficiency testing facility characteristics cover measurement sections, measurements ports and working area for the participants. Requirements on the proficiency testing schemes cover: - design, including planning, preparations, homogeneity and stability of test atmospheres and statistical design; - operation, including handling and instruction of participants; - calculation and use of assigned values; and - testing results evaluation, including statistical data. This document supports the application of proficiency testing schemes for checking the performance of testing laboratories in the context of qualification, accreditation and related quality checks in relation to the application of standardized measurement methods such as standard reference methods (SRM) or alternative methods (AM). This document is applicable in combination with EN ISO/IEC 17043 only.

Obsah

ČSN EN ISO 5467-2 This document specifies the requirements and test methods for mobile dental units concerning: a) the properties of mobile dental unit connections to the compressed air supply, water supply, suction supply, and wastewater drain plumbing, b) the materials, design, and construction of the compressed air and water system within the mobile dental unit, c) the quality for incoming water and air, d) the performance of mobile dental unit suction system, and e) the air, water, suction and wastewater properties of mobile dental unit connections to the interfaces to dental handpieces. This document also specifies requirements for instructions for use and a technical description. This document is only applicable to mobile dental units that are not used for oral surgery treatment requiring sterile air and water supplies. Amalgam separators are not included in this document.

Obsah

ČSN EN ISO 5467-1 This document specifies the requirements and test methods for mobile dental units and dental patient chairs that is intended to be used within a permanent healthcare facility regardless of whether they are or not electrically powered. This document also specifies the requirements for the instructions for use, for the technical description, for marking and for packaging. Operator's stools, stationary dental equipment, other types of mobile dental equipment, portable dental equipment and operating lights are not in the scope of this document.

Obsah

ČSN EN ISO 3107 This document specifies requirements for zinc oxide-eugenol cements suitable for use in restorative dentistry for temporary cementation, for bases and as temporary restorations. This document also specifies requirements for non-eugenol zinc oxide cements containing zinc oxide and oil(s) other than eugenol for temporary cementation.