SIST EN 14175-3:2004
(Main)Fume cupboards - Part 3: Type test methods
Fume cupboards - Part 3: Type test methods
Part 5 of this European Standard specifies type test methods for the assessment of safety, robustness and performance of fume cupboards.
Abzüge - Teil 3: Baumusterprüfverfahren
Anwendungsbereich
Dieser Teil der Europäischen Norm EN 14175 legt Baumusterprüfverfahren zur Bewertung der Sicherheit und des Leistungsvermögens von Frontschieber und Luftströmung von Abzügen fest. Die entsprechenden Anforderungen sind in Teil 2 von EN 14175 festgelegt.
Für Begriffe zu Abzügen gilt EN 14175-1. Für Sicherheits- und Leistungsanforderungen gilt EN 14175-2.
ANMERKUNG Teil 4 dieser Europäischen Norm für die Vor-Ort Prüfung von im Labor installierten Abzügen befindet sich in Vorbereitung.
Für die Prüfung von mikrobiologischen Sicherheitswerkbänken gilt EN 12469.
Sorbonnes - Parite 3: Méthodes d'essai de type
La présente partie de la norme européenne EN 14175 spécifie les méthodes d'essai de type pour l'évaluation de la sécurité et des performances des sorbonnes. La partie 2 de la présente Norme européenne spécifie des exigences pertinentes.
Pour les termes et leurs définitions, l'EN 14175-1 s'applique. Pour les exigences de sécurité et de performances des sorbonnes, l'EN 14175-2 s'applique.
NOTE La partie 4 de la présente Norme européenne est en préparation pour les méthodes d'essai sur site des sorbonnes.
Pour les essais des postes de sécurité microbiologique, l'EN 12469 s'applique.
Fume cupboards - Part 3: Type test methods
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fume cupboards - Part 3: Type test methodsFume cupboards - Part 3: Type test methodsSorbonnes - Parite 3: Méthodes d'essai de typeAbzüge - Teil 3: Baumusterprüfverfahren71.040.10Kemijski laboratoriji. Laboratorijska opremaChemical laboratories. Laboratory equipmentICS:SIST EN 14175-3:2004enTa slovenski standard je istoveten z:EN 14175-3:200301-februar-2004SIST EN 14175-3:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14175-3December 2003ICS 71.040.10English versionFume cupboards - Part 3: Type test methodsSorbonnes - Parite 3: Méthodes d'essai de typeAbzüge - Teil 3: BaumusterprüfverfahrenThis European Standard was approved by CEN on 1 October 2003.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,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14175-3:2003 E
EN 14175-3:2003 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Terms and definitions.53.1plane of sash.53.2inner measurement plane.53.3containment factor (CF).64Test room and general test conditions.64.1Dimensions and construction.64.2Test room conditions.64.3Fume cupboard installation.64.4Test conditions.65Air flow tests.75.1Extract volume flow rate.75.2Face velocity.75.3Containment.85.4Robustness of containment.145.5Air exchange efficiency.155.6Pressure drop.176Sash tests.176.1Sash suspension test.176.2Sash displacement test.186.3Protection against splashes.186.4Sash stop and alarm test.187Air flow indicator tests.188Construction and materials tests.189Illuminance test.1810Test report.18Annex A (informative)
Sound tests.20Bibliography.21
EN 14175-3:2003 (E)3ForewordThis document (EN 14175-3:2003)
has been prepared by Technical Committee CEN/TC 332 “Laboratoryequipment”, the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by June 2004, and conflicting national standards shall be withdrawn at the latest byJune 2004.Annex A is informative.This European Standard EN 14175 consists of the following parts, under the general title Fume cupboards;¾ Part 1: Vocabulary¾ Part 2: Safety and performance requirements¾ Part 3: Type test methods¾ Part 4: On-site test methods¾ Part 5: Recommendations for installation and maintenance (in preparation)¾ Part 6: Variable air volume fume cupboards (in preparation)According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
EN 14175-3:2003 (E)4IntroductionThe objective of this European Standard is to specify type test methods relevant to the assessment of the safetyand performance of fume cupboards.
EN 14175-3:2003 (E)51 ScopeThis part of the European Standard EN 14175 specifies type test methods for the assessment of safety andperformance of fume cupboards. Relevant requirements are specified in Part 2 of this European Standard.For terms and their definitions EN 14175-1 applies. For safety and performance requirements of fume cupboardsEN 14175-2 applies.NOTEFor on-site test methods of fume cupboards, Part 4 of this European Standard is in preparation.For the testing of microbiological safety cabinets EN 12469 applies.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 12665, Light and lighting — Basic terms and criteria for specifying lighting requirements.EN 13150:2001, Workbenches for laboratories — Dimensions, safety requirements and test methods.EN 14175-1:2003, Fume cupboards — Part 1: Vocabulary.EN 14175-2:2003, Fume cupboards — Part 2: Safety and performance requirements.EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 1: General principles and requirements (ISO 5167-1:2003).EN ISO 12569, Thermal insulation in buildings — Determination of air change in buildings — Tracer gas dilutionmethod (ISO 12569:2000).3 Terms and definitionsFor the purposes of this European Standard, the definitions given in EN 14175-1:2003 and the following apply.3.1 plane of sashplane in the middle between the innermost and the outermost screen surfaces of that part of the sash forming theupper boundary of the test sash opening.NOTEThis definition replaces the definition given in EN 14175-1:2003, 5.4.3.2 inner measurement planeplane of sash at the type test opening, except where the plane of sash does not meet the work surface of the fumecupboard. In the latter case, it is usually a non-vertical plane bounded;¾ at the top by the lowest point of the upper edge of the type test opening in the plane of the sash;¾ at the bottom by the uppermost point of the lower edge of the opening closest to the plane of sash;
EN 14175-3:2003 (E)6¾ at the sides by the side edges of the opening.NOTE 1See examples in Figures 1 and 2.NOTE 2This definition replaces the definition given in EN 14175-1:2003, 7.7.3.3 containment factor (CF)ratio of calculated concentration of tracer gas in the work space of the fume cupboard to the measuredconcentration in the inner or outer measurement plane.NOTEThe containment factor is no constant value but depends on the extract volume flow rate and the measuredconcentration of tracer gas.4 Test room and general test conditions4.1 Dimensions and constructionThe test room shall consist of an enclosure of cuboid shape, constructed of suitable materials, within an existingbuilding or laboratory. The internal width and length shall be not less than 4,0 m and the ceiling height not less than2,7 m. The ceiling and floor shall be level and the room shall be devoid of internal supports, internal walls or otherobstacles to the airflow.4.2 Test room conditionsThe room air temperature shall be (23 ± 3) °C. The make-up air temperature during measurements shall be roomair temperature ± 1 °C. Temperature gradients shall be avoided to the greatest possible extent. The make-up airshall be supplied at a distance greater than 2 m from the front of the fume cupboard.The test zone boundary shall extend approx. 1,5 m in front of the fume cupboard and approx. 1,0 m from the outersidewalls of the cupboard over the full room height.Room extract air shall be extracted symmetrically on the opposite side to the make-up air supply and from outsidethe test zone. The air speed shall be less than 0,1 m/s at the test zone boundaries. Care shall be taken regardinguncontrolled air streams and draughts entering into the test room.Any device the temperature of which exceeds 40 °C, except components which form part of the fume cupboardand/or the test equipment, shall be located outside the test zone boundaries.The air extracted from the test room shall be discharged to atmosphere in such a way as to prevent its re-entrainment in the make-up air.4.3 Fume cupboard installationThe fume cupboard shall be installed centrally on a wall with its back to the wall.The test shall be carried out on the fume cupboard installed in the test room in accordance with the manufacturer'sinstallation instructions.4.4 Test conditions4.4.1 GeneralNo person other than the operator(s) shall be present in the test room during the measurements. No person shallremain in the test zone during the measurements.
EN 14175-3:2003 (E)7There shall be no unnecessary obstructions or equipment within the test zone. No equipment other than thatnecessary for the tests shall be in the fume cupboard.Windows and doors of the test room shall remain closed during measurements.NOTEObservance of all test conditions is crucial for reproducibility and comparability of the test results.4.4.2 Test sash positions4.4.2.1 Vertical sash fume cupboardsThe sash shall be set to the height of 500 mm ± 1 % measured in the center of the opening. If the maximum heightis less than 500 mm, the maximum operational sash opening shall be used and noted. If any additional opening isused, this shall be noted in the test report.4.4.2.2 Horizontal sash fume cupboardsSash(es) shall be set at one side opening of 500 mm ± 1 %. If the maximum sash opening is less than 500 mm,then the maximum opening shall be used and noted. The test shall be carried out with the first side opening andshall be repeated with the opening at the other side. If any additional opening is used, this shall be noted in the testreport.4.4.2.3 Combination sash(es)Vertical sash test: all horizontal sash(es) shall be set to the minimum sash opening and the procedure as in 4.4.2.1shall be followed.Horizontal sash test: vertical sash(es) shall be set to the minimum sash opening and the procedure as in 4.4.2.2shall be followed.If any additional opening is used, this shall be noted in the test report.4.4.3 General procedureThe type testing procedures shall be applied to one example of a production model of the fume cupboard to betested.Adjust the make-up air and extract air systems to give the required flow rates and test conditions. Switch on allinstruments and data recording (storing) device(s), and allow sufficient time for the instruments to stabilise.5 Air flow tests5.1 Extract volume flow rateFor each extract volume flow rate setting, the flow rate shall be measured in the extract duct in accordance with ENISO 5167-1. The uncertainty of measurement shall not exceed ± 5 %.5.2 Face velocity5.2.1 Test equipment5.2.1.1 AnemometerThe anemometer shall be of the unidirectional type with a directional sensitivity of ± 20°. The time constant of theanemometer shall be less than 0,5 s. The uncertainty of an individual measurement shall not exceed 0,02 m/s + 5% of the reading in the range of 0,2 m/s to 1,0 m/s. An anemometer with a valid calibration certificate shall be used.
EN 14175-3:2003 (E)85.2.1.2 Data recordingA means of recording the output of the anemometer for subsequent analysis shall be provided.5.2.2 Probe positionsThe anemometer probe shall be positioned at points formed by the intersection of lines on the inner measurementplane (see examples in Figure 1) as follows:a) a series of at least three equally spaced lines between the side boundaries of the inner measurement planewith the two outermost lines (100 ± 5) mm from the side boundaries. The lines in between shall be at adistance of 400 mm or less from the outermost lines and to each other.b) a series of at least three equally spaced lines between the horizontal boundaries of the inner measurementplane with the two outermost lines (100 ± 5) mm from the horizontal boundaries. The lines in between shall beat a distance of 400 mm or less from the outermost lines and to each other.5.2.3 Test procedureMeasurements shall be made with the anemometer probe located at each of the measurement grid points. Adjustthe orientation of the sensor so that its measurement direction is perpendicular to the inner measurement plane.Disturbances to the space upstream of the sensor shall be minimised.Measure and record the individual velocity component vi perpendicular to the inner measurement plane at regularintervals of 1,0 s or less for a period of at least 60 s.5.2.4 Data analysis and resultsCalculate at each measurement point by equation (1) the mean value v of the measured velocity components ivinmeter per seconds and round the result to the second decimal place: inivnvå==11(1)where n is the number of measurements taken during the period of min. 60 s.Calculate at each measurement point by equation (2) the standard deviation rsof the measured velocitycomponents iv in meter per seconds and round the result to the second decimal place:()112--=å=nvvsniir(2)Calculate the spatial average velocity (see EN 14175-1:2003, 7.6) in meters per seconds at the type test openingand round the result to the second decimal place.5.3 Containment5.3.1 Test equipment5.3.1.1 GeneralThe following test equipment shall be used. Other equipment and/or test gas may also be used provided that it isproven to give the same results within ± 10 %. Materials of construction should not effect the test results. Allinstruments shall have a valid calibration.
EN 14175-3:2003 (E)95.3.1.2 Tracer gasThe tracer gas shall be sulphur hexafluoride (SF6).5.3.1.3 Test gasThe test gas shall be (10 ± 1) % volume fraction of sulphur hexafluoride (SF6) in nitrogen (N2). The storagetemperature of the test gas shall be at the test room temperature ± 2 °C.5.3.1.4 Test gas flow regulatorThe test gas flow regulator shall be capable of regulating the flow rate with a maximum permissible error of ± 5 %.5.3.1.5 Test gas injectorThe test gas injector shall be a hollow cylinder made of sintered metal with a length between 20 mm and 25 mmand a diameter between 10 mm and 15 mm. The pressure drop through each test gas injector shall be within 10 %of their mean value. Test gas injectors shall be connected to the test gas source by flexible tubes of equal length.5.3.1.6 Sampling probeEach sampling probe shall consist of a tube of internal diameter (10 ± 1) mm and a length of at least 100 mm. Thetube's wall thickness shall not exceed 2 mm.5.3.1.7 Sampling manifoldThe sampling manifold shall be a hollow cylinder with a minimum aspect ratio (diameter/height) of 10. The samplingprobe connecting tubes shall be evenly distributed around the perimeter of the cylinder with the manifold outlet inthe centre.5.3.1.8 Connecting tubingThe sampling probes shall be connected to the sampling manifold by flexible tubes of equal lengths.5.3.1.9 Sampling pumpThe sampling pump shall be capable of operating at a flow rate constant within ± 5 %.5.3.1.10 Gas analyserThe gas analyser including the connected means of recording shall have a detection level of 10-8 or less volumefraction of the tracer gas.5.3.1.11 Time constant of the test systemThe time constant of the sampling system including gas analyser shall be less than 15 s.5.3.1.12 Data recordingA means of recording the output signal of the gas analyser for subsequent analysis shall be provided. Therecording interval shall be 2 s or less.5.3.2 Test conditionsThe background concentration of tracer gas in the test room shall not exceed 10-8 volume fraction.
EN 14175-3:2003 (E)105.3.3 Positioning of test equipment for inner measurement planeNine sampling probes (see 5.
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