EN ISO 4892-3:2013

SLOVENSKI STANDARD
01-maj-2014
1DGRPHãþD
SIST EN ISO 4892-3:2006
Polimerni materiali - Metode izpostavljanja laboratorijskim virom svetlobe - 3. del:
Fluorescentne UV-svetilke (ISO 4892-3:2013)
Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps
(ISO 4892-3:2013)
Kunststoffe - Künstliches Bestrahlen oder Bewittern in Geräten - Teil 3: UV-
Leuchtstofflampen (ISO 4892-3:2013)
Plastiques - Méthodes d'exposition à des sources lumineuses de laboratoire - Partie 3:
Lampes fluorescentes UV (ISO 4892-3:2013)
Ta slovenski standard je istoveten z: EN ISO 4892-3:2013
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 4892-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2013
ICS 83.080.01 Supersedes EN ISO 4892-3:2006
English Version
Plastics - Methods of exposure to laboratory light sources - Part
3: Fluorescent UV lamps (ISO 4892-3:2013)
Plastiques - Méthodes d'exposition à des sources Kunststoffe - Künstliches Bestrahlen oder Bewittern in
lumineuses de laboratoire - Partie 3: Lampes fluorescentes Geräten - Teil 3: UV-Leuchtstofflampen (ISO 4892-3:2013)
UV (ISO 4892-3:2013)
This European Standard was approved by CEN on 24 August 2013.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4892-3:2013: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 4892-3:2013) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
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 March 2014, and conflicting national standards shall be withdrawn at
the latest by March 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4892-3:2006.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4892-3:2013 has been approved by CEN as EN ISO 4892-3:2013 without any modification.

INTERNATIONAL ISO
STANDARD 4892-3
Third edition
2013-09-15
Plastics — Methods of exposure to
laboratory light sources —
Part 3:
Fluorescent UV lamps
Plastiques — Méthodes d’exposition à des sources lumineuses de
laboratoire —
Partie 3: Lampes fluorescentes UV
Reference number
ISO 4892-3:2013(E)
©
ISO 2013
ISO 4892-3:2013(E)
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 4892-3:2013(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 2
4.1 Laboratory light source . 2
4.2 Test chamber . 5
4.3 Radiometer . 5
4.4 Black-panel/black-standard thermometer . 5
4.5 Wetting . 6
4.6 Specimen holders . 6
4.7 Apparatus to assess changes in properties . 6
5 Test specimens. 6
6 Test conditions . 7
6.1 Radiation . 7
6.2 Temperature . 7
6.3 Condensation and spray cycles . 7
6.4 Cycles with dark periods . 7
6.5 Sets of exposure conditions . 7
7 Procedure. 8
7.1 General . 8
7.2 Mounting the test specimens . 8
7.3 Exposure . 9
7.4 Measurement of radiant exposure . 9
7.5 Determination of changes in properties after exposure . 9
8 Exposure report . 9
Annex A (informative) Relative irradiance of typical fluorescent UV lamps .10
Bibliography .15
ISO 4892-3:2013(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 6, Ageing, chemical
and environmental resistance.
This third edition cancels and replaces the second edition (ISO 4892-3:2006), which has been
technically revised.
The main technical changes are:
a) Table 4 explains cycles, lamp types and irradiance with greater clarity;
b) the term “daylight” has been replaced throughout by “global solar radiation”;
c) in Table 4, combination lamp option has been transferred to Annex A.
ISO 4892 consists of the following parts, under the general title Plastics — Methods of exposure to
laboratory light sources:
— Part 1: General guidance
— Part 2: Xenon-arc lamps
— Part 3: Fluorescent UV lamps
— Part 4: Open-flame carbon-arc lamps
iv © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 4892-3:2013(E)
Plastics — Methods of exposure to laboratory light sources —
Part 3:
Fluorescent UV lamps
1 Scope
This part of ISO 4892 specifies methods for exposing specimens to fluorescent UV radiation, heat and
water in apparatus designed to simulate the weathering effects that occur when materials are exposed
in actual end-use environments to global solar radiation, or to solar radiation through window glass.
The specimens are exposed to fluorescent UV lamps under controlled environmental conditions
(temperature, humidity and/or water). Different types of fluorescent UV lamp can be used to meet all
the requirements for testing different materials.
Specimen preparation and evaluation of the results are covered in other International Standards for
specific materials.
General guidance is given in ISO 4892-1.
[4]
NOTE Fluorescent UV lamp exposures for paints, varnishes and other coatings are described in ISO 11507.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 4582, Plastics — Determination of changes in colour and variations in properties after exposure to
daylight under glass, natural weathering or laboratory light sources
ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
3 Principle
3.1 Fluorescent UV lamps, when following the manufacturer’s recommendations for lamp
maintenance and/or rotation, may be used to simulate the spectral irradiance of global solar radiation
in the short wavelength ultraviolet (UV) region of the spectrum.
3.2 Specimens are exposed to various levels of UV radiation, heat and moisture (see 3.4) under
controlled environmental conditions.
3.3 The exposure conditions may be varied by selection of:
a) type of fluorescent UV lamp;
b) irradiance level;
c) temperature during the UV exposure;
d) type of wetting (see 3.4);
e) wetting temperature and cycle;
f) timing of the UV/dark cycle.
ISO 4892-3:2013(E)
3.4 Wetting is usually produced by condensation of water vapour on to the exposed specimen
surface or by spraying the test specimens with demineralized/deionized water.
3.5 The procedure(s) may include measurement of the irradiance and the radiant exposure in the
plane of the specimen.
3.6 It is recommended that a similar material of known performance (a control) be exposed
simultaneously with the test specimens to provide a standard for comparative purposes.
3.7 Intercomparison of results obtained from specimens exposed in different types of apparatus or
to different types of lamp should not be made unless an appropriate statistical relationship has been
established between the different types of equipment for the material to be tested.
4 Apparatus
4.1 Laboratory light source
4.1.1 Fluorescent UV lamps are fluorescent lamps in which radiant emission in the ultraviolet region
of the spectrum, i.e. below 400 nm, makes up at least 80 % of the total light output. There are three types
of fluorescent UV lamp used in this part of ISO 4892:
— UVA-340 (type 1A) fluorescent UV lamp: these lamps have a radiant emission below 300 nm of
less than 1 % of the total light output, have an emission peak at 343 nm, and are more commonly
identified as UVA-340 for simulation of global solar radiation from 300 nm to 340 nm (see Table 1).
Figure A.1 is a graph of spectral irradiance from 250 nm to 400 nm of a typical UVA-340 (type 1A)
fluorescent lamp compared to global solar radiation.
— UVA-351 (type 1B) fluorescent UV lamp: these lamps have a radiant emission below 310 nm of
less than 1 % of the total light output, have a peak emission at 353 nm, and are more commonly
identified as UVA-351 for simulation of the UV portion of solar radiation behind window glass (see
Table 2). Figure A.2 is a graph of spectral irradiance from 250 nm to 400 nm of a typical UVA-351
(type 1B) fluorescent UV lamp compared to global solar radiation filtered by window glass.
— UVB-313 (type 2) fluorescent UV lamp: these lamps are more commonly identified as UVB-313
and have a radiant emission below 300 nm that is more than 10 % of the total output and a peak
emission at 313 nm (see Table 3). Figure A.3 is a graph of the spectral irradiance from 250 nm to
400 nm of two typical UVB-313 (type 2) fluorescent lamps compared to global solar radiation. UVB-
313 (type 2) lamps may be used only by agreement between the parties concerned. Such agreement
shall be stated in the test report.
— Four different UV lamps used as one combination: these four different UV lamps are used
together as one combination with a suited filter. See Figure A.4 in A.2.3.
NOTE 1 UVB-313 (type 2) lamps have a spectral distribution of radiation, which peaks near the 313 nm
mercury line and can emit radiation down to λ = 254 nm, which can initiate ageing processes that never occur in
end-use environments.
NOTE 2 The solar spectral irradiance for a number of different atmospheric conditions is described in
[1]
CIE Publication No. 85. The benchmark global solar radiation used in this part of ISO 4892 is from Table 4 of
CIE Publication No. 85:1989.
4.1.2 Unless otherwise specified, UVA-340 (type 1A) fluorescent UV lamps shall be used to simulate the
UV part of global solar radiation (see Table 4, method A). Unless otherwise specified, UVA-351 (type 1B)
lamps shall be used to simulate the UV part of solar radiation through window glass (see Table 4,
method B). The four lamp UV combination may be used (see A.2.3) and shall be stated in the test report.
4.1.3 Fluorescent lamps age significantly with extended use. If an automatic irradiance control system
is not used, follow the apparatus manufacturer’s instructions on the procedure necessary to maintain
the desired irradiance.
2 © ISO 2013 – All rights reserved

ISO 4892-3:2013(E)
4.1.4 Irradiance uniformity shall be in accordance with the requirements specified in ISO 4892-1.
Requirements for periodic repositioning of specimens when irradiance within the exposure area is less
than 90 % of the peak irradiance are described in ISO 4892-1.
Table 1 — Relative ultraviolet spectral irradiance for UVA-340 (type 1A) lamps for global solar
ab
UV radiation (method A)
Spectral passband
c de c
Minimum CIE No. 85:1989, Table 4 Maximum
[λ = wavelength
% % %
in nanometres (nm)]
λ < 290 – 0 0,1
290 ≤ λ ≤ 320 5,9 5,4 9,3
320 < λ ≤ 360 60,9 38,2 65,5
360 < λ ≤ 400 26,5 56,4 32,8
a
This table gives the irradiance in the given passband, expressed as a percentage of the total irradiance between 290 nm
and 400 nm. To determine whether or not a specific UVA-340 (type 1A) lamp meets the requirements of this table, the
spectral irradiance from 250 nm to 400 nm shall be measured. Typically, this is done in 2 nm increments. The total irradiance
in each passband is then summed and divided by the total irradiance between 290 nm and 400 nm.
b
The minimum and maximum limits for UVA-340 (type 1A) lamps in this table are based on more than 60 spectral
[[2]]
irradiance measurements with UVA-340 (type 1A) lamps from different production lots and of various ages. The spectral
irradiance data are for lamps within the ageing recommendations of the manufacturer of the apparatus. As more spectral
irradiance data become available, minor changes in the limits are possible. The minimum and maximum limits are at least
three sigma from the mean for all the measurements.
c
The minimum and maximum columns will not necessarily sum to 100 % because they represent the minima and
maxima for the measurement data used. For any individual spectral irradiance distribution, the percentages calculated
for the passbands in this table will sum to 100 %. For any individual UVA-340 (type 1A) fluorescent lamp, the calculated
percentage in each passband shall fall within the minimum and maximum limits given. Test results can be expected to differ
between exposures using UVA-340 (type 1A) lamps in which the spectral irradiance differs by as much as that allowed by
the tolerances. Contact the manufacturer of the fluorescent UV apparatus for specific spectral irradiance data for the UVA-
340 (type 1A) lamp used.
d
The data from Table 4 of CIE Publication No. 85:1989 are the global solar irradiance on a horizontal surface for an air
mass of 1,0, an ozone column of 0,34 cm at STP, 1,42 cm of precipitable water vapour and a spectral optical depth of aerosol
extinction of 0,1 at 500 nm. These data are provided for reference purposes only and are intended to serve as a target.
e
For the solar spectrum represented by Table 4 of CIE No. 85:1989, the UV irradiance (290 nm to 400 nm) is 11 % and
the visible irradiance (400 nm to 800 nm) is 89 %, expressed as a percentage of the total irradiance from 290 nm to 800 nm.
Because the primary emission of fluorescent UV lamps is concentrated in the 300 nm to 400 nm passband, there are limited
data available for the visible light emission of fluorescent UV lamps. The percentages of UV irradiance and visible irradiance
on specimens exposed in fluorescent UV apparatus may vary due to the number of specimens being exposed and their
reflectance properties.
...