EN 13274-3:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Respiratory protective devices - Methods of test - Part 3: Determination of breathing resistanceOprema za varovanje dihal – Metode preskušanja – 3. del: Ugotavljanje dihalne upornostiAppareils de protection respiratoire - Méthodes d'essai - Partie 3: Détermination de la résistance respiratoireAtemschutzgeräte - Prüfverfahren - Teil 3: Bestimmung des Atemwiderstandes13.340.30Varovalne dihalne napraveRespiratory protective devicesICS:SIST EN 13274-3:2002enTa slovenski standard je istoveten z:EN 13274-3:200101-junij-2002SIST EN 13274-3:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13274-3September 2001ICS 13.340.30English versionRespiratory protective devices - Methods of test - Part 3:Determination of breathing resistanceAppareils de protection respiratoire - Méthodes d'essai -Partie 3: Détermination de la résistance respiratoireAtemschutzgeräte - Prüfverfahren - Teil 3: Bestimmung desAtemwiderstandesThis European Standard was approved by CEN on 17 August 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13274-3:2001 E

Fitting procedure for hoods which seal around the neck and which may or maynot incorporate a head harness.13A.1Introduction.13A.2Principle.13A.3Apparatus.13A.3.1Sheffield dummy head/torso.13A.3.2Stand and elastic string, for hoods which do not incorporate a head harness.13A.3.3Adjustable collar.13A.4Procedure.14Annex B (normative)
Test results - Uncertainty of measurement.17Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives.18

pre-conditioning;
The convention of reporting breathing resistance is that if during the inhalation resistance test, the pressure inside thefacepiece relative to atmosphere is negative, no sign is used in front of the result. If the relative pressure inside the facepiece ispositive, the result is prefixed with a ‘+’.6.2 Equipment6.2.1Pressure gauge, calibrated in the appropriate range and with a sensitivity better than 10% of the limit valueof breathing resistance specified in the relevant device standard.6.2.2Flowmeter(s) calibrated in the appropriate range.6.2.3Regulated blower/compressed air source or a variable suction device.6.2.4Support for the device (e.g. filter holder, Sheffield dummy head with insert or torso with insert) as describedin the relevant device standard.6.3 Procedure6.3.1 Ambient conditionsIf ambient conditions differ from 23 °C and 1 bar absolute, all flow rates shall be adjusted so that they give thecorrect flow rate when corrected to 23 °C and 1 bar absolute.6.3.2 Procedure for filtersTwo methods of passing air through the filter are possible and typical examples are shown in Figures 1a) and 1b).The first method employs a chamber in which the filter holding device is fixed (see Figure 1a)). Air is directed into
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