EN 13274-6:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Respiratory protective devices - Methods of test - Part 6: Determination of carbon dioxide content of the inhalation airAppareils de protection respiratoire - Méthodes d'essai - Partie 6: Détermination de la teneur en dioxyde de carbone de l'air inhaléAtemschutzgeräte - Prüfverfahren - Teil 6: Bestimmung des Kohlenstoffdioxid-Gehaltes der Einatemluft13.340.30Varovalne dihalne napraveRespiratory protective devicesICS:SIST EN 13274-6:2002enTa slovenski standard je istoveten z:EN 13274-6:200101-junij-2002SIST EN 13274-6:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13274-6December 2001ICS 13.340.30English versionRespiratory protective devices - Methods of test - Part 6:Determination of carbon dioxide content of the inhalation airAppareils de protection respiratoire - Méthodes d'essai -Partie 6: Détermination de la teneur en dioxyde de carbonede l'air inhaléAtemschutzgeräte - Prüfverfahren - Teil 6: Bestimmung desKohlenstoffdioxid-Gehaltes der EinatemluftThis European Standard was approved by CEN on 16 November 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 13274-6:2001 E

Fitting procedure for hoods (with or without head harness) which seal aroundthe neck.10A.1Introduction.10A.2Principle.10A.3Apparatus.10A.3.1Sheffield dummy head/torso.10A.3.2Stand and elastic string.10A.3.3Adjustable collar.10A.4Procedure.11Annex B (informative)
Test results - Uncertainty of measurement.14Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives.15

direction of any supplementary air flow; pass/fail criteria; any deviations from test method.5 Test method5.1 PrincipleThe device is fitted, as described by the device standard, to a Sheffield dummy head/torso and, in the case ofcomplete equipment tests, any air supply is operated in the manufacturer's minimum condition unless prescribedotherwise by that standard. Breathing air containing a defined concentration of carbon dioxide is supplied at aspecified rate from a breathing machine to a dummy head/torso. The inhaled air is analysed for carbon dioxidecontent.The carbon dioxide level measured gives an assessment of the "dead space" of the facepiece rather than a "reallife" measurement of the level of carbon dioxide in the inhaled air.5.2 Test equipment5.2.1 GeneralA typical test arrangement using a single cylinder breathing machine is shown in Figure 1.The total dead space of the gas path of the test installation, excluding the volume of the breathing machine, shallnot exceed 2000 ml.The test shall be carried out at ambient conditions.5.2.2 Breathing machineA breathing machine and associated equipment with solenoid valves controlled by the breathing machine. In orderto avoid errors in the measurement of carbon dioxide in the inhaled air, it is important that the solenoid valves makea good seal on closing and that the timing of their action allows no overlap to occur.5.2.3 Carbon dioxide sampling arrangementA sample of the inhaled air is taken by an auxiliary lung driven by the breathing machine and in phase with it. It isset to inhale a known sample volume (a chosen percentage of the inhalation volume of the breathing machine)during the inhalation stroke of the breathing machine. This apparent "loss" in inhalation volume of the breathingmachine is compensated for by the volume of carbon dioxide fed via the flowmeter into the breathing machine onits inhalation stroke. It is therefore important that these two volumes are equal.The exhaled air is continuously monitored for carbon dioxide content at a flow determined by the analyser. Thesample point is immediately before the solenoid valve in the exhalation circuit. To maintain equilibrium the sampleis returned to the circuit upstream of the sample point.The carbon dioxide absorber is necessary to prevent build-up of carbon dioxide in the test equipment circuit. Thecompensators allow constant conditions to be maintained for particular parts of the test circuit.5.2.4 Sheffield head/torsoSheffield head fitted with concentric tubes and central carbon dioxide sampling tube, shown in Figure 2. Where atorso is fitted, the tubes are directed down the neck section to exit from the torso at a convenient point as shown inFigure A.2. The extra volume of this arrangement should be borne in mind (see 5.2.1).
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