SIST EN 15976:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hidroizolacijski trakovi - Ugotavljanje emisivnostiAbdichtungsbahnen - Bestimmung des EmissionsgradesFeuilles souples d'étanchéité - Détermination de l'émissivitéFlexible sheets for waterproofing - Determination of emissivity91.100.50Veziva. Tesnilni materialiBinders. Sealing materialsICS:Ta slovenski standard je istoveten z:EN 15976:2011SIST EN 15976:2011en,fr,de01-oktober-2011SIST EN 15976:2011SLOVENSKI
STANDARD



SIST EN 15976:2011



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15976
April 2011 ICS 91.100.50 English Version
Flexible sheets for waterproofing - Determination of emissivity
Feuilles souples d'étanchéité - Détermination de l'émissivité Abdichtungsbahnen - Bestimmung des Emissionsgrades This European Standard was approved by CEN on 17 March 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15976:2011: ESIST EN 15976:2011



EN 15976:2011 (E) 2 Contents Page Foreword .31 Scope .42 Normative references .43 Terms and definitions .44 Symbols .45 Principle of low emitting surfaces .56 Hemispherical blackbody radiator .66.1 Principle of hemispherical blackbody radiator .66.2 Description of hemispherical blackbody radiator and of the specimen holder .76.3 Handling procedure of calibration standards .86.4 Calculation of the emissivity .96.5 Measurement range of hemispherical blackbody radiator .97 Sampling and preparation of the test specimens .97.1 Sampling .97.2 Dimensions and numbers of specimens .97.3 Preparation of specimens before testing .98 Procedure for measurement of specimens .99 Expression of the results . 1010 Emissivity after conditioning . 1010.1 Specialities of application related aging . 1010.2 Conditioning procedure . 10Bibliography . 11 SIST EN 15976:2011



EN 15976:2011 (E) 3 Foreword This document (EN 15976:2011) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for waterproofing”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 15976:2011



EN 15976:2011 (E) 4
1 Scope This European Standard specifies the method to determine the emissivity of plastic, rubber and bitumen vapour control layers, underlays for walls and underlays for discontinuous roofing.
It also defines a conditioning procedure for these product families in order to quantify the sensitivity of emissivity to humidity and temperature.
2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13416, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Rules for sampling 3 Terms and definitions For the purposes of this document, the following terms and definitions apply 3.1 emissivity emissivity of a material (usually written 0) is the ratio (proportion) of the energy radiated by a surface relative to the energy radiated by a blackbody at the same temperature. It is a measure of a material's ability to radiate heat 3.2 blackbody blackbody is a theoretical object that absorbs all electromagnetic radiation that falls on it at all wavelengths. No electromagnetic radiation passes through it and none is reflected NOTE A blackbody is also a perfect emitter with a normal and corrected emissivity of 1.
3.3 TIR Thermal Infrared Radiation principle
4 Symbols For the purposes of this document, the following symbols apply c specific heat capacity is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by a certain temperature interval.
the wavelength
is the distance between repeating units of a propagation wave of a given frequency. NOTE In this document it is understood the wave length is limited to the infrared light spectrum.
SIST EN 15976:2011



EN 15976:2011 (E) 5 . (alpha) represents the absorption coefficient of a surface and is the ratio of the radiant energy absorbed by that surface relative to that of a blackbody at the same temperature.
0
(epsilon) emissivity (see above definition of emissivity)
(0 ≤ 0 ≤ 1).
(rho) reflectivity coefficient is the proportion of the incident electromagnetic radiation reflected from a surface or an optical element.
τ (tau) transmission coefficient is the proportion of incident electromagnetic radiation (light) passes through a surface or an optical element. 0L
emissivity for the low emissive calibration standard. 0H
emissivity for the high emissive calibration standard. U
sensor signal of the specimen in Volt. UH
sensor signal of the high emissive calibration standard in Volt. UL
sensor signal of the low emissive calibration standard in Volt. 5 Principle of low emitting surfaces
Flexible sheets for waterproofing with a low emitting surface are commonly refer
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