FprEN 17348
(Main)Requirements for design and testing of vacuum cleaners for use in potentially explosive atmospheres
Requirements for design and testing of vacuum cleaners for use in potentially explosive atmospheres
This document specifies requirements for design, construction, testing and marking of hand-held, portable and transportable vacuum cleaners, including their accessories, constructed to Group II, categories 2G or 3G (of explosion groups IIA, IIB, IIB plus hydrogen), and to Group II, categories 2D or 3D (of explosion groups IIIA, IIIB and IIIC), intended for the collection of combustible or non-combustible dusts and flammable or non-flammable liquids in potentially explosive atmospheres. A potentially explosive atmosphere could be generated by the equipment during its intended use.
NOTE 1 The accumulation of 1 mm or more of combustible dust on surfaces in a working area can create an explosive atmosphere (see reference to 1/32 in. of Depth of Dust Accumulation for Guidance for Area Electrical Classification in NFPA 654, 2017 Edition).
This document applies to equipment driven by electric power and by pneumatic power.
This document gives guidelines for dealing with significant hazards, hazardous situations and/or events relevant to vacuum cleaners when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer.
Typical applications for the concerned equipment are:
- collection of dust produced by machinery at the point of generation;
- general housekeeping around machinery and of working areas; and/or
- collection of spills;
- cleaning of equipment during maintenance operations; and/or
- collection of specific waste.
For the collection of dust in the presence of flammable liquids or vapours, a specific risk assessment is performed if this is part of the vacuum cleaners intended conditions of use and additional precautions beyond what is described in this document can be required.
NOTE 2 The passage of dust through a vacuum cleaner will generate high levels of electrostatic charge which, in most situations, will be a potential source of ignition to a flammable gas or vapour atmosphere.
For the collection of low-conductivity flammable liquids, a specific risk assessment is performed if this is part of the vacuum cleaners intended conditions of use and additional precautions beyond what is described in this document can be required.
NOTE 3 The resulting liquid velocities are likely to be in excess of the limits required to maintain electrostatic charge generation at a non-hazardous level according to CLC/TR 60079 32 1:2018.
This document does not apply to equipment used to collect toxic dusts where there is a health risk if dust passes through the filter elements. This document does not apply to the collection of dusts which have explosive and unstable properties (UN transport class 1, class 4.1 and class 5.2).
NOTE 4 Hazards related to the use of vacuum cleaners for the collection of hazardous dusts are the subject of other standards.
This document applies to vacuum cleaners with an internal dirty air volume of maximum 250 l.
NOTE 5 250 l is the volume above which it is recognized a vacuum cleaner might not be considered as transportable by an operator, and above which additional explosion protections can be required.
The present version of the document does not apply to battery operated equipment.
NOTE 6 Battery operated equipment might be part of the scope of this document in a subsequent version.
This document does not apply to vacuum trucks.
This document applies to vacuum cleaners of canister and back-pack types. This document does not apply to upright vacuum cleaners.
This document does not apply to motorized cleaning head accessories.
NOTE 7 This document does not apply to household appliances which are the subject of other standards.
This document does not apply to applications where the substances are conveyed into a separate receiving container.
This document does not apply to equipment intended for use in underground parts of mines as well as those parts of surface installations of such mines endangered by firedamp and/or combustible dust.
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Anforderungen an die Konstruktion und Prüfung von Staubsaugern zur Verwendung in explosionsgefährdeten Bereichen
Dieses Dokument legt die Gestaltungs-, Konstruktions-, Prüf- und Kennzeichnungsanforderungen für mobile und transportable Handstaubsauger sowie deren Zubehör fest, die entsprechend Gruppe II, Kategorie 2G oder Kategorie 3G (der Explosionsgruppen IIA, IIB und Wasserstoff) sowie Gruppe II, Kategorie 2D und Kategorie 3D (der Explosionsgruppe IIIA, IIIB und IIIC) konstruiert werden und für die Sammlung von brennbarem oder nicht brennbarem Staub und entzündbaren oder nicht entzündbaren Flüssigkeiten in explosionsgefährdeten Bereichen bestimmt sind. Ein explosionsgefährdeter Bereich könnte während des bestimmungsgemäßen Gebrauchs des Gerätes erzeugt werden.
ANMERKUNG 1 Die Ansammlung von 1 mm oder mehr brennbarem Staub auf Oberflächen in einem Arbeitsbereich kann eine explosionsfähige Atmosphäre erzeugen (siehe Literaturhinweis zu 1/32 in. of Depth of Dust Accumulation for Guidance for Area Electrical Classification in NFPA 654, 2017 Edition).
Dieses Dokument ist anzuwenden für Geräte, die mit elektrischen und mit pneumatischen Antriebssystemen angetrieben werden.
Dieses Dokument enthält Richtlinien für den Umgang mit wesentlichen Gefährdungen, Gefährdungssituationen und/oder Gefährdungssituationen mit Bezug zu Staubsaugern, wenn sie bestimmungsgemäß und unter Bedingungen von durch den Hersteller vernünftigerweise vorhersehbaren Fehlanwendungen verwendet werden.
Typische Anwendungsbereiche für die betroffenen Geräte sind:
— Sammlung von durch Maschinen erzeugten Staub am Ort der Erzeugung;
— allgemeine Reinigung im Bereich um Maschinen und von Arbeitsbereichen; und/oder
— Sammlung von verschütteten Substanzen;
— Reinigung der Geräte bei Wartungsarbeiten; und/oder
— Sammlung von spezifischem Abfall.
Für die Staubaufnahme bei Vorhandensein von brennbaren Flüssigkeiten oder Dämpfen wird eine spezifische Risikobeurteilung durchgeführt, wenn dies Teil der vorgesehenen Einsatzbedingungen des Staubsaugers ist und zusätzliche Vorsichtsmaßnahmen, die über das in diesem Dokument beschriebene Maß hinausgehen, erforderlich sein können.
ANMERKUNG 2 Beim Durchströmen von Staub durch einen Staubsauger entstehen hohe elektrostatische Aufladungen, die in den meisten Situationen eine potenzielle Zündquelle für eine brennbare Gas- oder Dampfatmosphäre darstellen.
Für das Aufsaugen von brennbaren Flüssigkeiten mit geringer Leitfähigkeit wird eine spezifische Risikobeurteilung durchgeführt, wenn dies Teil der vorgesehenen Einsatzbedingungen des Staubsaugers ist und zusätzliche Vorsichtsmaßnahmen, die über das in diesem Dokument beschriebene Maß hinausgehen, erforderlich sein können.
ANMERKUNG 3 Die daraus resultierenden Flüssigkeitsgeschwindigkeiten liegen wahrscheinlich über den Grenzwerten, die erforderlich sind, um die elektrostatische Aufladung nach CLC/TR 60079 32 1:2018 auf einem nicht gefährlichen Niveau zu halten.
Dieses Dokument ist nicht anzuwenden für Geräte zum Sammeln von giftigen Stäuben, durch die ein Gesundheitsrisiko entsteht, wenn der Staub die Filterelemente durchläuft. Dieses Dokument ist auch nicht anzuwenden für die Sammlung von Stäuben, die explosionsfähige und instabile Eigenschaften (UN-Transportklasse 1, -klasse 4.1 und -klasse 5.2) aufweisen.
ANMERKUNG 4 Gefährdungen im Zusammenhang mit der Verwendung von Staubsaugern zur Aufnahme von gefährlichen Stäuben sind Gegenstand anderer Normen.
Dieses Dokument ist anzuwenden für Staubsauger mit einem inneren Schmutzluftvolumen von maximal 250 l.
ANMERKUNG 5 250 l ist das Volumen, ab dem ein Staubsauger als von einem Bediener nicht mehr transportierbar angesehen wird und ab dem ein zusätzlicher Explosionsschutz erforderlich sein kann.
Die vorliegende Ausgabe des Dokuments ist nicht anzuwenden für batteriebetriebene Geräte.
Exigences relatives à la conception et aux essais des aspirateurs destinés à être utilisés en atmosphère explosible
Le présent document spécifie les exigences relatives à la conception, à la construction, aux essais et au marquage des aspirateurs portatifs tenus à la main, mobiles et transportables, y compris leurs accessoires, construits conformément aux catégories 2G et 3G du groupe II (des groupes d’explosion IIA, IIB et IIB plus hydrogène) et aux catégories 2D et 3D du groupe II (des groupes d’explosion IIIA, IIIB et IIIC), destinés à collecter des poussières combustibles ou non combustibles et des liquides inflammables ou ininflammables dans des atmosphères explosibles. Une atmosphère explosible peut être générée par l’équipement pendant son utilisation prévue.
NOTE 1 L’accumulation de 1 mm ou plus de poussières combustibles sur les surfaces dans une zone de travail peut engendrer une atmosphère explosive (voir la référence à 1/32 pouce d’épaisseur de poussière accumulée indiquée comme recommandation pour la classification des surfaces électriques dans la norme NFPA 654, 2017, édition 2017).
Le présent document s’applique aux équipements fonctionnant à l’énergie électrique ou pneumatique.
Le présent document fournit des lignes directrices pour traiter de tous les phénomènes dangereux, situations dangereuses et/ou événements dangereux significatifs applicables aux aspirateurs, lorsqu’ils sont utilisés conformément à l’utilisation prévue et dans des conditions de mauvais usage raisonnablement prévisible par le fabricant.
Les applications types des équipements concernés sont :
- la collecte des poussières produites par des machines au niveau du point où elles sont générées ;
- l’entretien général autour des machines et des zones de travail ;
- la collecte des déversements accidentels ;
- le nettoyage des équipements pendant les opérations de maintenance ;
- la collecte de déchets spécifiques.
Pour la collecte de poussières en présence de liquides ou de vapeurs inflammables, une évaluation des risques spécifique est réalisée si cela fait partie intégrante des conditions d’utilisation prévue des aspirateurs et des précautions supplémentaires peuvent être requises en plus de ce qui est décrit dans le présent document.
NOTE 2 Le passage de poussière dans un aspirateur génère des niveaux importants de charge électrostatique qui, dans la plupart des situations, représentent une source potentielle d’inflammation d’un gaz inflammable ou d’une atmosphère vaporeuse.
Pour la collecte de liquides inflammables à faible conductivité, une évaluation des risques spécifique est réalisée si cela fait partie intégrante des conditions d’utilisation prévue des aspirateurs, et des précautions supplémentaires peuvent être requises en plus de ce qui est décrit dans le présent document.
NOTE 3 Les vitesses de liquide résultantes sont susceptibles d’être supérieures aux limites requises pour maintenir la génération de charge électrostatique à un niveau non dangereux conformément au CLC/TR 60079 32 1:2018.
Le présent document ne s’applique pas aux équipements utilisés pour collecter des poussières toxiques lorsqu’il existe un risque pour la santé si les poussières traversent les éléments filtrants. Le présent document ne s’applique pas à la collecte des poussières ayant des propriétés explosives et instables (classes de transport 1, 4.1 et 5.2 des Nations Unies).
NOTE 4 Les dangers liés à l’utilisation d’aspirateurs pour la collecte de poussières dangereuses font l’objet d’autres normes.
Le présent document s’applique aux aspirateurs ayant un volume interne d’air sale de 250 l maximum.
...
Zahteve za načrtovanje in preskušanje sesalnikov in zbiralnikov prahu za uporabo v potencialno eksplozivnih atmosferah
General Information
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN 17348:2019
01-april-2019
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Requirements for design and testing of vacuum cleaners and dust collectors for use in
potentially explosive atmospheresAnforderungen an die Konstruktion und Prüfung von Staubsaugern und
Staubabscheidern zur Verwendung in explosionsgefährdeten Bereichen
Exigences relatives à la conception et aux essais des aspirateurs et des dépoussiéreurs
destinés à être utilisés en atmosphères explosiblesTa slovenski standard je istoveten z: prEN 17348
ICS:
97.080 $SDUDWL]DþLãþHQMH Cleaning appliances
oSIST prEN 17348:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 17348:2019
DRAFT
EUROPEAN STANDARD
prEN 17348
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2019
ICS 97.080
English Version
Requirements for design and testing of vacuum cleaners
and dust collectors for use in potentially explosive
atmospheres
Anforderungen an die Konstruktion und Prüfung von
Staubsaugern und Staubabscheidern zur Verwendung
in explosionsgefährdeten Bereichen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 305.If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17348:2019 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
oSIST prEN 17348:2019
prEN 17348:2019 (E)
Contents Page
European foreword ....................................................................................................................................................... 7
Introduction .................................................................................................................................................................... 8
1 Scope .................................................................................................................................................................... 9
2 Normative references .................................................................................................................................... 9
3 Terms and definitions ................................................................................................................................ 10
4 Safety requirements and protective measures ................................................................................. 16
4.1 General ............................................................................................................................................................. 16
4.2 Ignition hazard and significant hazards assessment ...................................................................... 16
4.3 Assignment of categories .......................................................................................................................... 16
4.4 Assignment of types .................................................................................................................................... 17
4.5 Design codes “E” for vacuum cleaner categories .............................................................................. 17
4.6 Design codes “M” for the vacuum cleaner types................................................................................ 18
5 Safety requirements for all vacuum cleaner categories and types regarding ignition
hazards ............................................................................................................................................................. 19
5.1 Hot surfaces .................................................................................................................................................... 19
5.1.1 General ............................................................................................................................................................. 19
5.1.2 Temperature classification....................................................................................................................... 19
5.2 Naked flame.................................................................................................................................................... 20
5.3 Mechanically generated sparks .............................................................................................................. 20
5.4 Exothermic reactions .................................................................................................................................. 20
5.5 Fans ................................................................................................................................................................... 20
5.6 Electrical components and devices........................................................................................................ 21
5.7 Electrostatic Hazards related to the external parts of the vacuum cleaner ........................... 21
5.7.1 General ............................................................................................................................................................. 21
5.7.2 Earthing ........................................................................................................................................................... 21
5.7.3 Main body of the vacuum cleaner ........................................................................................................... 21
5.7.4 Suction hose, tools and accessories ....................................................................................................... 21
5.7.5 Requirements regarding the use of insulating solid materials ................................................... 22
5.8 General requirements for the internal part of the vacuum-cleaner.......................................... 22
5.8.1 Airflow generating electrostatic charges ............................................................................................ 22
5.8.2 Cloth filter media .......................................................................................................................................... 22
5.8.3 Protection against sparks generated by single impacts ................................................................ 22
5.8.4 Electrical and non-electrical equipment and components ........................................................... 22
6 Safety requirements for all vacuum-cleaner categories and types regardingsignificant hazards ....................................................................................................................................... 23
6.1 Mechanical hazards ..................................................................................................................................... 23
6.2 Noise hazards................................................................................................................................................. 23
6.3 Collapsing due to vacuum ......................................................................................................................... 23
6.4 Vibration hazards......................................................................................................................................... 23
6.5 Material/substance hazards .................................................................................................................... 23
6.5.1 Avoiding dust clouds ................................................................................................................................... 23
6.5.2 Avoid dust accumulation ........................................................................................................................... 24
6.5.3 Prevent spillage ............................................................................................................................................ 24
6.6 Fastening systems ........................................................................................................................................ 24
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6.7 Compatibility with material being collected ...................................................................................... 24
6.8 Material containment .................................................................................................................................. 24
6.9 Metal oxidation (rust) ................................................................................................................................. 24
6.10 Ergonomic hazards ...................................................................................................................................... 24
7 Additional requirements for electrical vacuum cleaners .............................................................. 24
7.1 General ............................................................................................................................................................. 24
7.2 Detachable supply cords ............................................................................................................................ 24
7.3 Through flow and open enclosure motors .......................................................................................... 25
7.4 Motor temperature control ....................................................................................................................... 25
7.4.1 Thermal protector ........................................................................................................................................ 25
7.4.2 Thermal overload protection ................................................................................................................... 25
7.4.3 Vacuum relief valve...................................................................................................................................... 25
7.5 Materials for rotating and stationary parts of fans .......................................................................... 25
8 Additional requirements for non-electrical vacuum cleaners ..................................................... 25
8.1 General ............................................................................................................................................................. 25
8.2 Material pairing ............................................................................................................................................. 25
9 Additional safety requirements for Dry Type dust collectors ...................................................... 26
9.1 General ............................................................................................................................................................. 26
9.2 Protection against hazards related to collected dusts present in the working air ............... 26
9.3 Protection against collected hot embers or ignited dust ............................................................... 27
9.4 Safety filter ...................................................................................................................................................... 27
10 Additional safety requirements for Wet Type dust collectors ..................................................... 27
10.1 General ............................................................................................................................................................. 27
10.2 Precipitation of the collected dust.......................................................................................................... 27
10.3 Moisture capture ........................................................................................................................................... 27
10.3.1 Electrical vacuum cleaners ....................................................................................................................... 27
10.3.2 Non-electrical vacuum cleaners .............................................................................................................. 28
10.3.3 Absolute coalescing filter........................................................................................................................... 28
10.4 Liquid level indicator .................................................................................................................................. 28
10.5 Creation of a gas explosive atmosphere ............................................................................................... 28
10.6 Degassing vent ............................................................................................................................................... 28
10.7 Vacuum relief vent ....................................................................................................................................... 28
10.8 Additional filtration level inside the collection tank ....................................................................... 28
10.9 Safety filter ...................................................................................................................................................... 29
11 Additional safety requirement for Liquid collectors ....................................................................... 29
11.1 General ............................................................................................................................................................. 29
11.2 Suction cut-off system ................................................................................................................................. 29
11.3 Liquid adapted main filter ......................................................................................................................... 29
11.4 Liquid adapted safety filter ....................................................................................................................... 29
11.5 Creation of a gas explosive atmosphere ............................................................................................... 29
11.6 Degassing vent ............................................................................................................................................... 30
11.7 Vacuum relief vent ....................................................................................................................................... 30
11.8 Accidental spillage ....................................................................................................................................... 30
12 Type verification and test .......................................................................................................................... 30
12.1 Temperature measurement ..................................................................................................................... 30
12.2 Tests for thermal endurance .................................................................................................................... 30
12.2.1 General ............................................................................................................................................................. 30
12.2.2 Thermal endurance to heat....................................................................................................................... 30
12.2.3 Thermal endurance to cold ....................................................................................................................... 30
12.3 Mechanical tests ............................................................................................................................................ 30
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prEN 17348:2019 (E)
12.3.1 Resistance to impact ................................................................................................................................... 30
12.3.2 Drop test .......................................................................................................................................................... 31
12.3.3 Stability test ................................................................................................................................................... 31
12.3.4 Assessment of sparks generated by single impacts ......................................................................... 31
12.3.5 Resistance to lowest inlet pressure ....................................................................................................... 31
12.3.6 Burst strength test ....................................................................................................................................... 31
12.4 Electrostatic charges tests ........................................................................................................................ 31
12.4.1 Connection facilities for earthing conducting parts ........................................................................ 31
12.4.2 Electrostatic charges on external non-metallic materials ............................................................ 32
12.4.3 Accessible metal parts ................................................................................................................................ 32
12.5 Type verification and test for filters ..................................................................................................... 32
12.6 Test for motor temperature control systems .................................................................................... 32
12.6.1 Thermal protector attached to the motor ........................................................................................... 32
12.6.2 Thermal overload protection in the control switch ........................................................................ 32
12.6.3 Vacuum relief valve ..................................................................................................................................... 32
12.7 Test for wet type dust collector .............................................................................................................. 32
13 Routine test .................................................................................................................................................... 33
13.1 General ............................................................................................................................................................. 33
13.2 Test of performance .................................................................................................................................... 33
13.3 Test for electrical continuity .................................................................................................................... 34
13.4 Seal and filtration efficiency test ............................................................................................................ 34
14 Marking ............................................................................................................................................................ 34
15 Information for use ..................................................................................................................................... 36
15.1 General ............................................................................................................................................................. 36
15.2 Operation and maintenance manual..................................................................................................... 36
15.3 Technical features ........................................................................................................................................ 36
15.3.1 Seal and filtration efficiency .................................................................................................................... 36
15.3.2 Required input air pressure ..................................................................................................................... 36
15.3.3 Filtration system .......................................................................................................................................... 36
15.4 Intended use and limitations for use .................................................................................................... 36
15.4.1 General ............................................................................................................................................................. 36
15.4.2 Dry type dust collectors ............................................................................................................................. 37
15.4.3 Wet type dust collectors and liquid collectors .................................................................................. 37
15.4.4 Maximum surface temperatures ............................................................................................................ 37
15.4.5 Other considerations regrading limitations for use ........................................................................ 37
15.5 Routine inspections, service and cleaning .......................................................................................... 37
15.6 Additional instructions for safe use ...................................................................................................... 39
Annex A (informative) Methodological approach ......................................................................................... 41
Annex B (informative) Location of the power system in vacuum cleaners .......................................... 42
Annex C (informative) Examples of vacuum-cleaner types ....................................................................... 45
Annex D (normative) Vacuum cleaners assembled with a through flow motor or an open
enclosure bypass motor ............................................................................................................................. 49
D.1 General ............................................................................................................................................................. 49
D.2 Safety requirements .................................................................................................................................... 49
D.2.1 Required safety elements for Category 3D vacuum cleaners....................................................... 49
D.2.1.1 General ............................................................................................................................................................. 49
D.2.1.2 Protection against hazards related to air exhaust openings of the vacuum-cleaner .......... 50
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prEN 17348:2019 (E)
D.2.1.3 Protection against hazards related to cooling air intake for vacuum-cleaner using
bypass motors with an open enclosure ................................................................................................ 50
D.2.1.4 Protection against hazards related to cooling air exhaust for vacuum-cleaner using
bypass motors with an open enclosure ................................................................................................ 50
D.2.1.5 Protection against hazards related to working air exhaust .......................................................... 51
D.2.2 Required safety elements based on the collected material (“M”) ............................................... 51
D.2.2.1 General ............................................................................................................................................................. 51
D.2.2.2 Protection against hazards related to presence of combustible dust in working air
upstream of the power system ................................................................................................................ 52
D.2.2.3 Moisture capture ........................................................................................................................................... 52
D.2.3 Tests .................................................................................................................................................................. 52
D.2.3.1 General ............................................................................................................................................................. 52
D.2.3.2 Joints .................................................................................................................................................................. 52
D.2.3.3 Type tests for dust exclusion by enclosures ....................................................................................... 53
D.2.4 Marking and information of use .............................................................................................................. 53
D.2.5 Examples of vacuum cleaners providing an Ex “t” casing .............................................................. 53
Annex E (normative) Ignition Hazards Assessment ...................................................................................... 55
Annex F (normative) List of significant hazards ............................................................................................. 83
Annex G (normative) Seal and filtration efficiency test ............................................................................... 87
G.1 General ............................................................................................................................................................. 87
G.2 Test aerosol .................................................................................................................................................... 87
G.2.1 Monodisperse aerosol ................................................................................................................................. 87
G.2.2 Polydisperse aerosol ................................................................................................................................... 87
G.3 Aerosol generator ......................................................................................................................................... 87
G.3.1 Monodisperse aerosol ................................................................................................................................. 87
G.3.2 Polydisperse aerosol ................................................................................................................................... 87
G.4 Particle counter ............................................................................................................................................. 87
G.5 Test conditions .............................................................................................................................................. 88
G.6 Test procedure .............................................................................................................................................. 88
G.6.1 Preparatory checks ...................................................................................................................................... 88
G.6.2 Starting up the aerosol generator........................................................................................................... 88
G.6.3 Test execution ................................................................................................................................................ 88
G.6.4 Test for filtration efficiency ...................
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