EN 12942:2023

SLOVENSKI STANDARD
01-marec-2024
Nadomešča:
SIST EN 12942:1999
SIST EN 12942:1999/A1:2003
SIST EN 12942:1999/A2:2009
Oprema za varovanje dihal - Zaščitna obrazna, polobrazna ali četrtinska maska s
tlačno filtracijo zraka - Zahteve, preskušanje, označevanje
Respiratory protective devices - Powered filtering devices incorporating full face masks,
half masks or quarter masks - Requirements, testing, marking
Atemschutzgeräte - Gebläsefiltergeräte mit Vollmaske, Halbmaske oder Viertelmaske -
Anforderungen, Prüfung, Kennzeichnung
Appareils de protection respiratoire - Appareils filtrants à ventilation assistée avec
masques complets, demi-masques ou quarts de masques - Exigences, essais,
marquage
Ta slovenski standard je istoveten z: EN 12942:2023
ICS:
13.340.30 Varovalne dihalne naprave Respiratory protective
devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12942
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2023
EUROPÄISCHE NORM
ICS 13.340.30 Supersedes EN 12942:1998
English Version
Respiratory protective devices - Powered filtering devices
incorporating full face masks, half masks or quarter masks
- Requirements, testing, marking
Appareils de protection respiratoire - Appareils Atemschutzgeräte - Gebläsefiltergeräte mit Vollmaske,
filtrants à ventilation assistée avec masques complets, Halbmaske oder Viertelmaske - Anforderungen,
demi-masques ou quarts de masques - Exigences, Prüfung, Kennzeichnung
essais, marquage
This European Standard was approved by CEN on 9 August 2021.
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12942:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions, description and symbols . 6
3.1 Terms and definitions . 6
3.2 Description . 7
3.3 Symbols . 7
4 Classification . 8
5 Requirements . 9
5.1 General . 9
5.2 Values and tolerances . 10
5.3 Ergonomics . 10
5.4 Design . 10
5.5 Materials . 10
5.6 Mechanical strength (optional) . 10
5.7 Resistance to temperature . 10
5.8 Respiratory interface (RI) . 11
5.9 Inward leakage . 13
5.10 Breathing resistance . 14
5.11 Air supply . 14
5.12 Warning facilities . 15
5.13 Electrical components . 15
5.14 Breathing hose, if applicable, and couplings . 15
5.15 Filters . 16
5.16 Noise level . 21
5.17 Carbon dioxide content of the inhalation air . 22
5.18 Flammability . 22
5.19 Mass of RPD . 22
5.20 Practical performance . 23
6 Testing . 23
6.1 Test schedule . 23
6.2 Conditioning . 25
6.3 Inspection . 25
6.4 Inward leakage . 26
6.5 Breathing resistance . 27
6.6 Manufacturer's minimum design duration. 27
6.7 Air supply flow rate . 28
6.8 Resistance to collapse of breathing hose . 30
6.9 Strength of hose and couplings . 31
6.10 Interactive flow rate . 31
6.11 Mechanical strength . 33
6.12 Filter performance testing . 34
6.13 Mass carried by the head . 38
7 Marking . 38
7.1 General . 38
7.2 RI . 38
7.3 Blower unit and battery casing (if separate from the blower) . 38
7.4 Filters . 39
7.5 Filter package . 40
7.6 RPD packages . 40
8 Information supplied by the manufacturer . 40
8.1 Complete RPD . 40
8.2 Filters . 41
Annex ZA (informative) Relationship between this European Standard and the essential
health and safety requirements of Regulation 2016/425/EU [2016 OJ L81] aimed to
be covered . 42
Bibliography . 44
European foreword
This document (EN 12942:2023) has been prepared by Technical Committee CEN/TC 79 “Respiratory
protective devices”, 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 or by endorsement, at the latest by June 2024 and conflicting national standards shall be
withdrawn at the latest by June 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12942:1998.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
The following main technical changes have been made compared to EN 12942:1998:
a) Clause 4 Designation was deleted;
b) number of test samples was added to the requirements, where necessary;
c) classification table was amended to cover Hg and NO filter for all classes (TM1, TM2 and TM3);
d) nominal values and tolerances were added;
e) clogging was deleted;
f) warning facilities were amended to cover low energy and low flow warning;
g) visual inspection was changed to inspection and detailed list inserted;
h) test substances and number of test subjects for inward leakage test was changed;
i) test for noise level was adapted to the test procedure specified in ISO 16900-14:2020;
j) Annex A was deleted;
k) figures were adapted to the changes made in the test procedures, where appropriate.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document specifies minimum requirements for powered Respiratory Protective Devices (RPD)
incorporating a tight-fitting respiratory interface. It does not cover devices designed for use in
circumstances where there is or might be an oxygen deficiency.
Escape RPD and filters for use against CO are not covered by this document.
Laboratory tests and practical performance tests are included for the assessment of compliance with the
requirements.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 136:1998, Respiratory protective devices — Full face masks — Requirements, testing, marking
EN 140:1998, Respiratory protective devices — Half masks and quarter masks — Requirements, testing,
marking
EN 148-1:2018, Respiratory protective devices — Threads for facepieces — Part 1: Standard thread
connection
EN 148-2:1999, Respiratory protective devices — Threads for facepieces — Part 2: Centre thread
connection
EN 148-3:1999, Respiratory protective devices — Threads for facepieces — Part 3: Thread
connection M 45 × 3
EN 175:1997, Personal protection — Equipment for eye and face protection during welding and allied
processes
EN 13274-2:2019, Respiratory protective devices — Methods of test — Part 2: Practical performance tests
EN 13274-4:2020, Respiratory protective devices — Methods of test — Part 4: Flame test
EN 13274-7:2019, Respiratory protective devices — Methods of test — Part 7: Determination of particle
filter penetration
EN ISO 16321-1:2022, Eye and face protection for occupational use — Part 1: General requirements (ISO
16321-1:2021)
EN ISO 16321-3:2022, Eye and face protection for occupational use — Part 3: Additional requirements for
mesh protectors (ISO 16321-3:2021)
EN ISO 16972:2020, Respiratory protective devices — Vocabulary and graphical symbols (ISO 16972:2020)
ISO 16900-14:2020, Respiratory protective devices — Methods of test and test equipment — Part 14:
Measurement of sound pressure level
3 Terms and definitions, description and symbols
For the purposes of this document, the terms and definitions given in EN ISO 16972:2020 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp/
3.1 Terms and definitions
3.1.1
as received
not pre-conditioned or modified to carry out a test
[SOURCE: EN ISO 16972:2020, definition 3.16]
3.1.2
ready for assembly state
component with seals, plugs or other environmental protective means, if applicable, still in place
[SOURCE: EN ISO 16972:2020, definition 3.195]
3.1.3
respiratory interface
RI
part of a respiratory protective device (RPD) that forms the protective barrier between the wearer's
respiratory tract and the ambient atmosphere
Note 1 to entry: The RI is connected to the filtering part of the RPD or the part managing the supply of breathable
gas.
[SOURCE: EN ISO 16972:2020, definition 3.202]
3.1.4
tight-fitting respiratory interface
RI that forms a protective barrier between the wearers respiratory tract and the ambient atmosphere by
forming a seal to the wearer’s skin
[SOURCE: EN ISO 16972:2020, definition 3.241]
3.1.5
powered filtering RPD
filtering RPD in which air is moved through the filter(s) by means of a blower to supply the wearer with
breathable air
[SOURCE: EN ISO 16972:2020, definition 3.180]
3.1.6
unencapsulated filter
filter that in itself is not contained in a rigid housing
[SOURCE: EN ISO 16972:2020, definition 3.247]
3.1.7
manufacturer's minimum design condition
lowest level of operating conditions of the device as stated by the manufacturer at which the complete
RPD will still meet the requirements for the designated class
[SOURCE: EN ISO 16972:2020, definition 3.137]
3.2 Description
Each device typically consists of:
— a tight-fitting respiratory interface, e.g. a full face mask, a half mask or a quarter mask which can be
combined with other types of PPE;
— a blower unit with an energy supply intended to be carried/worn by the wearer which supplies
filtered ambient air to the respiratory interface. The energy supply for the blower unit can or cannot
be carried on the person;
— a filter or filters through which all air supplied passes;
— one or more exhalation valves or other outlets through which exhaled air and air in excess of the
wearer's demand is discharged.
3.3 Symbols
3.3.1 "See information supplied by the manufacturer”

3.3.2 Crossed out 2: Symbol “for single shift use only”
During one shift multiple use is allowed.

3.3.3 Hour glass “end of shelf life”
YYYY-MM
Key: YYYY = year, MM = month
3.3.4 Maximum time of use of Hg filters

3.3.5 Temperature range of storage conditions
Key: -xx °C to +yy °C
3.3.6 Maximum humidity of storage conditions
Key: 4 Classification
The complete devices are classified and designated according to the maximum inward leakage and
maximum particle filter penetration as given in Table 1 and strength of hoses and couplings as given in
Table 2.
Table 1 — Classification
Maximum inward
Maximum particle
leakage
filter penetration
Classification of complete device
a
(TIL or IL)
%
%
Power
Gasfilter
type and
Particle filter Paraffin
Class class NaCl
(if applicable) oil
On Off
(if
applicable)
A1, A2 or A3
B1, B2 or B3
E1, E2 or E3
P 5 5
K1, K2 or K3
TM1 5 5
AX
SX
Hg P
0,05 0,05
NO P
A1, A2 or A3
B1, B2 or B3
E1, E2 or E3
P 0,5 0,5
K1, K2 or K3
TM2 0,5 1
AX
SX
Hg P
0,05 0,05
NO P
A1, A2 or A3
B1, B2 or B3
E1, E2 or E3
P
K1, K2 or K3
TM3 0,05 0,1 0,05 0,05
AX
SX
Hg P
NO P
EXAMPLE TM2A2P: a powered filtering device incorporating a tight-fitting RI (TM) fitted with a combined gas
filter and a particle filter (A2P) and where the inward leakage of the complete device is 0,5 % or
less.
a
TIL for combined and particle filter systems only. IL for gas filter systems.
Check in accordance with 7.3.
5 Requirements
5.1 General
All test samples specified in the related test clauses shall meet the relevant requirements.
Where it is required in a specific clause the manufacturer shall declare that a risk assessment, e.g. a
Failure Modes and Effect Analysis (FMEA) concerning these specific requirements has been conducted.
NOTE Further information is given in EN IEC 60812 [1].
If the manufacturer claims that the RPD may be used in potentially explosive atmospheres it shall comply
with the appropriate requirements.
If the RPD is intended to provide additional protection, e.g. head protection, eye protection, face
protection, or including protective clothing it shall additionally comply with the relevant requirements
of the standards covering those related PPE.
Check in accordance with 6.3.
It shall not be possible to connect any part of the RPD to a thread conforming to EN 148-2:1999 or
EN 148-3:1999.
Check in accordance with 6.3.
When the RPD manufacturer states that an accessory is intended for use with the RPD, the RPD including
the accessory shall be tested.
Check in accordance with 6.3 and test in accordance with the appropriate test method.
Depending on the design of the RPD all air flow rates can be influenced by:
— possible flow settings of the RPD,
— service life,
— the charging status of the battery,
— different filter types,
— alarm settings,
— use of accessories,
— hose length, and
— other factors, if applicable.
All results of measured air flow rates are deemed to be volumetric flow rates and shall be corrected to
20 °C, 1 013 hPa according to Formula (1).

P
m
(1)
Q Qk⋅⋅

cor m
T
m
where
Q is the corrected air flow;
cor
Q is the measured air flow;
m
k is a constant 0,289 [K/hPa], i.e. 293 K divided by 1 013 hPa (20°C);
P is the pressure during measurement in hPa;
m
T is the temperature during measurement in K.
m
=
5.2 Values and tolerances
Temperature limits, values which describe test conditions and that are not stated as maxima or minima
shall be subject to a tolerance of ± 5 %. Unless otherwise specified, the ambient conditions for testing
shall be between 16 °C and 32 °C and (50 ± 30) % relative humidity.
Any temperature limits specified shall be subject to an accuracy of ± 1 °C.
5.3 Ergonomics
The requirements of this document are intended to take account of the interaction between the wearer,
the RPD, and where possible the working environment in which the RPD is likely to be used. The RPD
shall satisfy 5.5, 5.11 and 5.12.
Testing shall be performed in accordance with EN 13274-2:2019.
5.4 Design
The finish of any part of the device likely to be in contact with the wearer shall be free from sharp edges
and burrs.
Check in accordance with 6.3 and test in accordance with EN 13274-2:2019.
5.5 Materials
5.5.1 General
Materials used shall be suitable to withstand the intended use and conditions (e.g. temperatures,
humidity and corrosive environments) as stated by the manufacturer, unless otherwise specified in this
document.
The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.
Check in accordance with 6.3.
5.5.2 Skin compatibility
Materials that may come into direct contact with the wearer's skin or that can affect the quality of the
breathing air shall not be known to be likely to cause skin irritation or any other adverse effects to health.
The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.
Check in accordance with 6.3.
5.6 Mechanical strength (optional)
After conditioning in accordance with 6.2.1, blower units and battery casings (if separate from the blower
unit) shall show no significant deformation of major components, nor shall these components separate
from each other.
The requirements of 5.7, 5.9 to 5.14 and 5.16 to 5.20 shall be met and the RPD shall be marked in
accordance with 7.3 d).
5.7 Resistance to temperature
After conditioning at the extremes of temperature and humidity in accordance with 6.2.2, the RPD
components including filters in their ready for assembly state shall show no significant deformation of
major components, nor shall these components separate from each other or from the complete RPD. The
requirements of 5.8 to 5.14 and 5.16 to 5.20 shall be met.
5.8 Respiratory interface (RI)
5.8.1 General
Where the RI is fitted with the standard thread connection as defined in EN 148-1:2018 it shall comply
with the requirements of EN 136:1998 or EN 140:1998 as appropriate.
Full face masks shall meet the requirements specified in 5.8.2 or EN 136:1998, as appropriate.
Half masks and quarter masks shall meet the requirements specified in 5.8.3 or EN 140:1998, as
appropriate.
5.8.2 Full face masks (other than those complying with EN 136:1998)
5.8.2.1 Connection to full face mask
RI shall not be equipped with a standard thread connection according to EN 148-1:2018.
The connection to the full face mask shall be leaktight.
When tested in accordance with EN 136:1998, 8.8, it shall withstand an axial force of (500 ± 50) N applied
for (10 ± 1) s whilst the RI is held by the facepiece.
All demountable connections shall be easily connected and secured, where possible by hand. Any means
of sealing used shall be retained in position when the connection is disconnected during normal
maintenance.
Check in accordance with 6.3.
5.8.2.2 Exhalation means
5.8.2.2.1 A full face mask shall have a means of allowing the escape of exhaled air and excess air
delivered by the air supply.
Check in accordance with 6.3.
5.8.2.2.2 Exhalation means shall be easily to maintain and correctly replaced.
Check in accordance with 6.3.
5.8.2.2.3 If tested in accordance with 6.5.3 the exhalation means shall function correctly.
5.8.2.2.4 Exhalation means shall be protected against or shall be resistant to dirt and mechanical
damage.
Check in accordance with 6.3.
5.8.2.2.5 Exhalation means shall operate correctly when tested in accordance with 6.4 and 6.5 and after
an exposure of a continuous exhalation flow of (300 ± 15) l/min for a period of (60 ± 6) s.
Check in accordance with 6.3.
5.8.2.2.6 When the housing of the exhalation means is attached to the RI it shall withstand an axial
force of (150 ± 15) N for a period of (10 ± 1) s.
The test shall be repeated 9 times.
5.8.2.3 Head harness
The head harness shall be designed so that the RI can be donned and removed easily.
The head harness shall be adjustable and shall hold the RI firmly and comfortably in position.
Check in accordance with 6.3 and test in accordance with 6.4 and EN 13274-2:2019.
Each strap shall withstand a tensile force of (150 ± 10) N for (10 ± 1) s in the direction of pull when the
full face mask is donned.
5.8.2.4 Eyepieces and visor(s)
5.8.2.4.1 Visors shall not distort vision nor shall any misting occur which significantly affects vision
when determined in accordance with EN 13274-2:2019.
Where anti-misting compounds are used or specified by the manufacturer they shall not be known to be
likely to cause irritation or any other adverse effect to health.
The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.
5.8.2.4.2 When tested in accordance with EN 136:1998, 8.17, the field of vision of the complete device
shall meet the following requirements:
— the effective field of vision of a full face mask fitted with a single visor shall be not less than 70 %
related to the natural field of vision, and the overlapped field of vision related to the natural
overlapped field of vision shall be not less than 80 %;
— a full face mask with two eyepieces shall be designed so that the effective field of vision shall be not
less than 70 % related to the natural field of vision, and the overlapped field of vision related to the
natural overlapped field of vision shall be not less than 20 %.
5.8.2.4.3 If it is intended to provide additionally protection against certain types of non-ionizing
radiation then the protection shall comply with the relevant clauses of EN 175:1997,
EN ISO 16321-1:2022 or EN ISO 16321-3:2022, as appropriate.
If the means of protection against non-ionizing radiation is integral with the equipment covered by this
document then the field of vision shall be measured as specified in EN 136:1998, 8.17, and reported for
information only and the device shall comply with the relevant clauses of EN 175:1997,
EN ISO 16321-1:2022 or EN ISO 16321-3:2022, as appropriate.
5.8.2.4.4 When tested in accordance with EN 136:1998, 8.11 (excluding leaktightness), but using two
samples only, the eyepieces or visor shall not be damaged so that the RI fails to meet the requirements
specified in 5.9.
5.8.2.5 Speech diaphragm
Where the RI includes a speech diaphragm it shall be protected against mechanical damage and shall
withstand a positive pressure of 15 mbar and a negative pressure of 80 mbar (static pressure).
When a speech diaphragm can be subjected to an external force it shall withstand an axial force of
(150 ± 10) N for (10 ± 1) s. The test shall be repeated 9 times.
5.8.3 Half masks and quarter masks (other than those complying with EN 140:1998)
5.8.3.1 RI connector
RI shall not be equipped with a standard thread connection according to EN 148-1:2018.
All demountable connections shall be easily connected and secured, where possible by hand. Any means
of sealing used shall be retained in position when the connection is disconnected during normal
maintenance.
Check in accordance with 6.3.
The connection to the half mask or quarter mask shall be leaktight. It shall withstand an axial tensile force
of (50 ± 5) N applied for (10 ± 1) s whilst the RI shall be held by the faceblank.
Testing shall be performed in accordance with EN 140:1998, 7.8.
5.8.3.2 Exhalation means
5.8.3.2.1 A half mask or quarter mask shall have a means of allowing the escape of exhaled air and
excess air delivered by the air supply.
5.8.3.2.2 Any exhalation means shall be easily to maintain and correctly replaced.
Check in accordance with 6.3.
5.8.3.2.3 If tested in accordance with 6.5.3 the exhalation means shall function correctly.
5.8.3.2.4 Exhalation means shall be protected against or be resistant to dirt and mechanical damage.
Check in accordance with 6.3.
5.8.3.2.5 Exhalation means shall operate correctly when tested in accordance with 6.4 and 6.5 and after
an exposure of a continuous exhalation flow of (300 ± 15) l/min for a period of (60 ± 6) s.
Check in accordance with 6.3.
5.8.3.2.6 When the housing of the exhalation means is attached to the RI it shall withstand an axial
force of (50 ± 5) N for a period of (10 ± 1) s.
5.8.3.3 Head harness
The head harness shall be so designed that the half mask or quarter mask can be donned and removed
easily.
The head harness shall be adjustable and shall hold the half mask or quarter mask firmly and comfortably
in position.
Check in accordance with 6.3 and test in accordance with 6.4 and EN 13274-2:2019.
Each strap shall withstand an axial force of (50 ± 5) N for (10 ± 1) s in the direction of pulling when the
half mask or quarter mask is donned.
5.8.3.4 Field of vision
The field of vision shall be assessed for acceptability.
Testing shall be performed in accordance with EN 13274-2:2019.
5.9 Inward leakage
5.9.1 General
Two samples, or more if disposable, shall be temperature conditioned in accordance with 6.2.2 and, if
applicable, mechanical strength conditioned in accordance with 6.2.1
The manufacturers' minimum design conditions shall be determined in accordance with 5.11.
If the RPD is for
— particles only, the inward leakage test shall be performed with ten subjects using NaCl aerosol;
— gases only, the inward leakage test shall be performed with ten test subjects using SF ;
— particles and gases, the inward leakage test shall be performed with five test subjects, using SF and
five subjects using NaCl aerosol. See Table 7.
Testing shall be performed in accordance with 6.4.
5.9.2 Power-on mode
When tested at the manufacturer's minimum design condition the inward leakage of the test substance
for each of the exercises shall not exceed the levels given in the appropriate class from Table 1, for each
of the 10 test subjects.
Testing shall be performed in accordance with 6.4.
5.9.3 Power-off mode
For 3 of the 10 test subjects and after the test in power-on mode, without removing the device, the inward
leakage shall be tested in the power off mode during which the inward leakage shall be not greater than
the levels given in the appropriate class from column 5 of Table 1, for each of the 3 test subjects.
Testing shall be performed in accordance with 6.4.
5.10 Breathing resistance
5.10.1 General
One sample shall be temperature preconditioned in accordance with 6.2.2 and, if applicable, mechanical
preconditioned in accordance with 6.2.1.
5.10.2 Inhalation resistance
When tested in accordance with 6.5.1, the peak inhalation resistance shall not exceed 11 mbar. When
tested in accordance with 6.5.2 and 6.5.3, the peak inhalation resistance shall not exceed 3,5 mbar.
5.10.3 Exhalation resistance
The peak exhalation resistance shall not exceed 7 mbar.
Testing shall be performed in accordance with 6.5.3.
5.11 Air supply
One sample shall be temperature conditioned in accordance with 6.2.2 and if applicable mechanical
preconditioned in accordance with 6.2.1.
The performance of the complete RPD shall equal or exceed the performance of the manufacturer's
minimum design condition for the manufacturer's stated design duration, when tested at a setting of the
breathing machine of 50 l/min (20 x 1,5 l/min) with a tolerance of ± 5 %.
Testing shall be performed in accordance with 6.6.
Where the manufacturer's minimum design condition is a manufacturer's minimum flow rate the
determination of the air supply flow rate shall be as specified in 6.7.
The flow rate and distribution of the air under the RI shall not cause distress to the wearer (for example
by excessive local cooling of the head and face or by causing eye irritation).
Check in accordance with 6.3 and test in accordance with EN 13274-2:2019.
It shall not be possible to switch off the air supply inadvertently.
Testing shall be performed in accordance with EN 13274-2:2019.
If a means is provided to adjust the air supply to give a RPD classification, it shall not be possible to change
the classification during use. The RPD shall be so designed that it is not possible to inadvertently change
the air flow.
A means for adjusting the airflow during use within a classification can be provided.
Check in accordance with 6.3 and test in accordance with EN 13274-2:2019.
5.12 Warning facilities
5.12.1 General
Two samples shall be mechanical preconditioned in accordance with 6.2.1, if applicable, and temperature
preconditioned in accordance with 6.2.2.
All warnings shall draw the attention of the wearer within 15 s once activated at or above the
manufacturer’s minimum design condition.
All warnings, except for low energy, shall continue to function while the cause of the warning remains.
After activation of the warning, it shall not be possible to turn off the warning device by the wearer while
the cause of the alarm remains.
Test in accordance with EN 13274-2:2019.
5.12.2 Low energy warning
All classes of the RPD shall be equipped with at least one low energy warning facility. Information about
the remaining service time to leave the hazardous environment, which shall be at least 5 min, shall be
given in the information supplied by the manufacturer.
Check in accordance with 6.3 and test in accordance with 6.7.5 and EN 13274-2:2019.
5.12.3 Manufacturer's minimum design condition warning
All classes of the RPD shall be equipped with at least one warning facility which indicates to the wearer
that the manufacturer's minimum design conditions are not met.
Check in accordance with 6.3 and test in accordance with 6.7.5 and EN 13274-2:2019.
5.13 Electrical components
One sample as received shall be checked .
Electrical components shall be so designed that it is not possible to inadvertently reduce or reverse the
air flow.
Check in accordance with 6.3 and EN 13274-2:2019.
If the device is claimed to be intrinsically safe for use in potentially explosive atmospheres it shall comply
with the appropriate requirements.
5.14 Breathing hose, if applicable, and couplings
5.14.1 General
Two samples shall be temperature preconditioned in accordance with 6.2.2.
Any breathing hose shall permit free head movement without danger of being caught up, as assessed by
the test subjects.
Testing shall be performed in accordance with EN 13274-2:2019.
When the breathing hose is compressed, the peak inhalation resistance shall not be changed by more
than 0,5 mbar and shall not exceed 3,5 mbar.
Testing shall be performed in accordance with 6.8.
Table 2 — Strength of hose and couplings
Classification Strength
N
TM1 (50 ± 2,5)
TM2 (100 ± 5)
TM3 (250 ± 10)
5.14.2 Strength of couplings to RI
Hoses and couplings shall meet the requirements given in Table 2 and shall not become disconnected or
visibly damaged. Where multiple hoses are fitted to the device each hose shall meet the requirements
given in Table 2. Each connection shall withstand the force as defined by its classification.
Testing shall be performed in accordance with 6.9.
5.15 Filters
5.15.1 Particle filters
5.15.1.1 Classification and designation
Powered particle filtering RPD shall be classified according to the maximum particle filter penetration
given in Table 1 when tested in accordance with 6.12 at a flow rate that corresponds to the peak value of
the interactive flow rate measured in 6.10.
Powered particle filtering RPD can be classified at three levels and shall be designated as follows:
TMyP
where
y is the inward leakage class 1, 2 or 3.
5.15.2 Gas filters
5.15.2.1 Classification and designation
Powered gas filtering RPD shall be classified according to their application and protection capacity when
tested in accordance with 6.12 at a flow rate that corresponds to the average value of the interactive flow
measured in 6.10 and shall be designated as follows:
TMy Gas z
where
y is the inward leakage class 1, 2 or 3 and
z is the capacity of the gas filter 1, 2 or 3 and
'Gas' means one or more of the types listed in (5.15.2.2.2), (5.15.2.2.3) or (5.15.2.2.4).
5.15.2.2 Types of filters
5.15.2.2.1 General
Gas filters are classified in the following types or combinations of them. If a filter is a combination of types,
it shall meet the requirements of each type separately.
5.15.2.2.2 Types A, B, E and K
a) Type A
For use against certain organic gases and vapours of organic substances with a boiling point higher
than 65 °C as specified by the manufacturer.
b) Type B
For use against certain inorganic gases and vapours as specified by the manufacturer (excluding
carbon monoxide).
c) Type E
For use against sulfur dioxide and other acidic gases and vapours as specified by the manufacturer.
d) Type K
For use against ammonia and organic ammonia derivatives as specified by the manufacturer.
5.15.2.2.3 Special filters
Special filters shall include a particle filter on the inlet side.
a) Type NO P
For use against oxides of nitrogen, e.g. NO, NO and/or NO .
2 x
Type NO P filters are for single shift use only up to the intended use time specified by the
manufacturer and shall be marked with the symbol given in 3.3.2.
b) Type Hg P
For use against mercury.
All Hg P filters are for a maximum accumulated use time of 50 h and shall be marked with the symbol
given in 3.3.4.
5.15.2.2.4 AX and SX filters
a) Type AX
For use against certain organic gases and vapours with a boiling point ≤ 65 °C as specified by the
manufacturer.
Type AX filters are for single shift use only and shall be marked with the symbol given in 3.3.2.
b) Type SX
For use against specific named gases and vapours as specified by the manufacturer.
5.15.2.3 Classes of filters
5.15.2.3.1 Types A, B, E, and K
Type A, B, E and K filters are classified as follows:
— Class 1: Low capacity;
— Class 2: Medium capacity;
— Class 3: High capacity.
Special filter shall only be specified for one class.
5.15.2.3.2 Combined filters
Combined filters shall be classified as separate entities in accordance with 5.15.1 and 5.15.2 and shall be
designated as follows:
TM y Gas z P
where
y is 1, 2 or 3
z is 1, 2 or 3 and
Gas means one or more of the types listed in (5.15.2.2.2), (5.15.2.2.3) or (5.15.2.2.4).
5.15.3 Filter requirements
5.15.3.1 General
The connection between filter(s) and the mating part of the device shall be robust and leaktight.
The connection between the filter and the mating part may be achieved by a special type of a connection,
a thread conforming to EN 148-1:2018 or other screw threads.
Filters other than prefilters shall be designed to be irreversible and shall be easily replaceable without
use of special tools.
Filters in their ready for assembly state shall be subjected to temperature conditioning as specified in 6.2
followed by the mechanical strength for filter as specified in 5.15.3.3.
For particle filter efficiency three filters for each test aerosol shall be tested in accordance with 6.12.2.
For gas capacity three filters for each test gas shall be tested in accordance with 6.12.3.
The particle filter of a combination filter shall be on the influent side of the filter.
Check in accordance with 6.3 and test in accordance with 6.4 and 6.12.
5.15.3.2 Materials
The inside of the filter shall be resistant to corrosion by the filter media.
Material from the filter media released by the air flow through the filter shall not pose a hazard or an
adverse effect for the wearer.
The manufacturer shall supply a declaration that both requirements were addressed by a risk
assessment, e.g. a FMEA.
Check in accordance with 6.3.
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