Fluorescent ultraviolet lamps used for tanning - Measurement and specification method (IEC 61228:2020)

This document describes the method of measuring, evaluating and specifying the UV irradiation
characteristics of fluorescent ultraviolet lamps that are used in appliances for tanning purposes.
It includes specific requirements regarding the marking of such lamps.
These requirements relate only to type testing.
Lamps complying with the requirements of this document comply with the electrical and
mechanical safety requirements of IEC 61195 and IEC 61199 with the exception of the
requirements for maximum limits of UV radiation.

UV-Leuchtstofflampen für Bräunungszwecke - Verfahren zur Messung und Beschreibung (IEC 61228:2020)

Lampes fluorescentes à ultraviolet utilisées pour le bronzage - Méthode de mesure et de spécification (IEC 61228:2020)

IEC 61228:2020 est disponible sous forme de IEC 61228:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 61228:2020 décrit la méthode pour mesurer, évaluer et spécifier les caractéristiques de rayonnement UV des lampes fluorescentes à UV utilisées dans les appareils de bronzage. Il inclut des exigences particulières concernant le marquage de telles lampes. Cette troisième édition annule et remplace la deuxième édition parue en 2008. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- code de facteur de conservation: description de l'affaiblissement de l'éclairement UV de la lampe du fait de son utilisation;
- position de fonctionnement: ajout d'informations pour les lampes à culot unique;
- système de mesure spectroradiométrique: nouvelles informations concernant la distance entre le capteur et l'axe de la lampe;
- procédure de mesurage et d'évaluation: informations précises distinctes pour les lampes fluorescentes à UV à deux culots et les lampes fluorescentes à UV à culot unique;
- Annexe C (normative), Méthode d'essai pour la conservation de l'éclairement: ajout de nouvelles informations;
- Annexe D (normative), Gabarit du réflecteur: ajout de nouvelles informations;
- Annexe E (normative), Feuilles de caractéristiques des lampes pour mesurage: ajout d'informations complémentaires.

Fluorescenčne ultravijolične sijalke za umetno sončenje - Merjenje in specifikacijska metoda (IEC 61228:2020)

General Information

Status
Published
Publication Date
14-Jan-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Jan-2021
Due Date
11-Mar-2021
Completion Date
15-Jan-2021

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SLOVENSKI STANDARD
SIST EN IEC 61228:2021
01-marec-2021
Nadomešča:
SIST EN 61228:2008
Fluorescenčne ultravijolične sijalke za umetno sončenje - Merjenje in
specifikacijska metoda (IEC 61228:2020)
Fluorescent ultraviolet lamps used for tanning - Measurement and specification method
(IEC 61228:2020)
UV-Leuchtstofflampen für Bräunungszwecke - Verfahren zur Messung und Beschreibung
(IEC 61228:2020)
Lampes fluorescentes à ultraviolet utilisées pour le bronzage - Méthode de mesure et de
spécification (IEC 61228:2020)
Ta slovenski standard je istoveten z: EN IEC 61228:2020
ICS:
17.240 Merjenje sevanja Radiation measurements
29.140.30 Fluorescenčne sijalke. Sijalke Fluorescent lamps.
Discharge lamps
97.170 Oprema za nego telesa Body care equipment
SIST EN IEC 61228:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61228:2021

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SIST EN IEC 61228:2021


EUROPEAN STANDARD EN IEC 61228

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2020
ICS 17.240; 29.140.01; 97.170 Supersedes EN 61228:2008 and all of its amendments
and corrigenda (if any)
English Version
Fluorescent ultraviolet lamps used for tanning - Measurement
and specification method
(IEC 61228:2020)
Lampes fluorescentes à ultraviolet utilisées pour le UV-Leuchtstofflampen für Bräunungszwecke - Verfahren
bronzage - Méthode de mesure et de spécification zur Messung und Beschreibung
(IEC 61228:2020) (IEC 61228:2020)
This European Standard was approved by CENELEC on 2020-12-09. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61228:2020 E

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SIST EN IEC 61228:2021
EN IEC 61228:2020 (E)
European foreword
The text of document 34A/2213/FDIS, future edition 3 of IEC 61228, prepared by SC 34A "Electric
light sources" of IEC/TC 34 "Lighting" was submitted to the IEC-CENELEC parallel vote and approved
by CENELEC as EN IEC 61228:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-09-09
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-12-09
document have to be withdrawn
This document supersedes EN 61228:2008 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61228:2020 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60081:1997 NOTE Harmonized as EN 60081:1998 (not modified)
IEC 60081:1997/A1:2000 NOTE Harmonized as EN 60081:1998/A1:2002
IEC 60081:1997/A2:2003 NOTE Harmonized as EN 60081:1998/A2:2003 (not modified)
IEC 60081:1997/A3:2005 NOTE Harmonized as EN 60081:1998/A3:2005 (not modified)
IEC 60081:1997/A4:2010 NOTE Harmonized as EN 60081:1998/A4:2010 (not modified)
IEC 60081:1997/A5:2013 NOTE Harmonized as EN 60081:1998/A5:2013 (not modified)
IEC 60081:1997/A6:2017 NOTE Harmonized as EN 60081:1998/A6:2017
IEC 60901:1996 NOTE Harmonized as EN 60901:1996 (not modified)
IEC 60901:1996/A1:1997 NOTE Harmonized as EN 60901:1996/A1:1997 (not modified)
IEC 60901:1996/A2:2000 NOTE Harmonized as EN 60901:1996/A2:2000 (not modified)
IEC 60901:1996/A3:2004 NOTE Harmonized as EN 60901:1996/A3:2004 (not modified)
IEC 60901:1996/A4:2007 NOTE Harmonized as EN 60901:1996/A4:2008 (not modified)
IEC 60901:1996/A5:2011 NOTE Harmonized as EN 60901:1996/A5:2012 (not modified)
IEC 60901:1996/A6:2014 NOTE Harmonized as EN 60901:1996/A6:2017 (modified)
IEC 61195 NOTE Harmonized as EN 61195
IEC 61199 NOTE Harmonized as EN 61199
IEC 62471:2006 NOTE Harmonized as EN 62471:2008 (modified)
2

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SIST EN IEC 61228:2021
EN IEC 61228:2020 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60061-1 - Lamp caps and holders together with EN 60061-1 -
gauges for the control ofinterchangeability
and safety. Part 1: Lamp caps
IEC 60081 - Double-capped fluorescent lamps - EN 60081 -
Performance specifications
IEC 60155 - Glow-starters for fluorescent lamps EN 60155 -
IEC 60335-2-27 - Household and similar electrical appliances EN 60335-2-27 -
- Safety - Part 2-27: Particular
requirements for appliances for skin
exposure to optical radiation
IEC 60921 - Ballasts for tubular fluorescent lamps - EN 60921 -
Performance requirements
IEC 60929 - AC and/or DC-supplied electronic control EN 60929 -
gear for tubular fluorescent lamps -
Performance requirements
IEC 61049 - Capacitors for use in tubular fluorescent EN 61049 -
and other discharge lamp circuits.
Performance requirements
ISO/CIE 28077 2016 Photocarcinogenesis action spectrum - -
(non-melanoma skin cancers)
CIE 63 1984 The spectroradiometric measurement of
light sources

3

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SIST EN IEC 61228:2021

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SIST EN IEC 61228:2021




IEC 61228

®


Edition 3.0 2020-11




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Fluorescent ultraviolet lamps used for tanning – Measurement and specification

method



Lampes fluorescentes à ultraviolet utilisées pour le bronzage – Méthode

de mesure et de spécification
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 17.240; 29.140.01; 97.170 ISBN 978-2-8322-9009-5




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 61228:2021
– 2 – IEC 61228:2020 © IEC 2020
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General test conditions . 7
4.1 Ageing . 7
4.2 Operating position . 7
4.3 Ambient temperature. 8
4.4 Test voltage . 8
4.5 Ballast . 9
5 Test requirements . 9
5.1 General . 9
5.2 Spectroradiometric measuring system . 9
6 Measurement and evaluation procedure . 9
6.1 Measurement . 9
6.1.1 General . 9
6.1.2 Double capped fluorescent UV Lamps . 9
6.1.3 Single capped fluorescent UV Lamps. 10
6.2 Calculation of the total effective UV irradiance . 10
6.3 Ambient temperature adjustment . 11
6.4 Reflector angle . 11
6.5 Determination of the lamp maintenance code . 11
7 Lamp specification . 11
8 Lamp marking . 12
Annex A (normative) Determination of the optimum UV irradiance of fluorescent

UV lamps . 13
Annex B (normative) Ultraviolet action spectra . 14
Annex C (normative) Method of test for irradiance maintenance . 16
C.1 General . 16
C.2 Lamps for operation on AC mains frequencies . 16
C.3 Lamps for operation on high frequency . 16
Annex D (normative) Reflector gauge . 17
Annex E (normative) Lamp datasheets for measurement . 18
Bibliography . 19

Figure 1 – Measurement position of single capped lamps . 8
Figure 2 – Test circuit . 8
Figure 3 – Location of measurement points on lamps with more than one layer . 10
Figure B.1 – UV action spectra for erythema and NMSC . 14
Figure D.1 – Reflector gauge . 17

Table B.1 – Weighting factors S(λ) for erythema and NMSC action spectrum . 15
Table E.1 – Lamp dimensions . 18

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SIST EN IEC 61228:2021
IEC 61228:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FLUORESCENT ULTRAVIOLET LAMPS USED FOR TANNING –
MEASUREMENT AND SPECIFICATION METHOD

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61228 has been prepared by subcommittee 34A: Electric light
sources, of IEC technical committee 34: Lighting.
This third edition cancels and replaces the second edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) maintenance code: description of the depreciation of the UV irradiance lamp during
operation;
b) operating position: information added for single capped lamps;
c) spectroradiometric measuring system: new information about distance between sensor and
lamp axis;
d) measurement and evaluation procedure: separated detailed information for double capped
fluorescent UV lamps and single capped fluorescent UV lamps;
e) Annex C (normative), Method of test for irradiance maintenance: new information added;
f) Annex D (normative), Reflector gauge: new information added;

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SIST EN IEC 61228:2021
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g) Annex E (normative), Lamp datasheets for measurement: complementary information added.
The text of this International Standard is based on the following documents:
FDIS Report on voting
34A/2213/FDIS 34A/2220/RVD

Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

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SIST EN IEC 61228:2021
IEC 61228:2020 © IEC 2020 – 5 –
FLUORESCENT ULTRAVIOLET LAMPS USED FOR TANNING –
MEASUREMENT AND SPECIFICATION METHOD



1 Scope
This document describes the method of measuring, evaluating and specifying the UV irradiation
characteristics of fluorescent ultraviolet lamps that are used in appliances for tanning purposes.
It includes specific requirements regarding the marking of such lamps.
These requirements relate only to type testing.
Lamps complying with the requirements of this document comply with the electrical and
mechanical safety requirements of IEC 61195 and IEC 61199 with the exception of the
requirements for maximum limits of UV radiation.
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.
IEC 60061-1, Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 1: Lamp caps
IEC 60081, Double-capped fluorescent lamps – Performance specifications
IEC 60155, Glow-starters for fluorescent lamps
IEC 60335-2-27, Household and similar electrical appliances – Safety – Part 2-27: Particular
requirements for appliances for skin exposure to optical radiation
IEC 60921, Ballasts for tubular fluorescent lamps – Performance requirements
IEC 60929, AC and/or DC-supplied electronic control gear for tubular fluorescent lamps –
Performance requirements
IEC 61049, Capacitors for use in tubular fluorescent and other discharge lamp circuits.
Performance requirements
ISO/CIE 28077:2016, Photocarcinogenesis action spectrum (non-melanoma skin cancers)
ClE 63:1984, The spectroradiometric measurement of light sources
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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SIST EN IEC 61228:2021
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ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
ultraviolet lamp
lamp which radiates especially strongly in the ultraviolet, the visible radiation produced, if any,
not being of direct interest
[SOURCE: IEC 60050-845:1987, 845-07-52, modified – Note deleted.]
3.2
fluorescent lamp
discharge lamp of the low-pressure mercury type in which most of the light is emitted by one or
several layers of phosphors excited by the ultraviolet radiation from the discharge
[SOURCE: IEC 60050-845:1987, 845-07-26, modified – Note deleted.]
3.3
spectroradiometer
instrument for measuring radiometric quantities in narrow wavelength intervals over a given
spectral region
[SOURCE: IEC 60050-845:1987, 845-05-07]
3.4
bandwidth at a given wavelength
width at half-amplitude points of the transmittance function of a monochromator
Note 1 to entry: The bandwidth is expressed in nm.
3.5
spectral
adjective that, when applied to a quantity X pertaining to electromagnetic radiation, indicates:
– either that X is a function of the wavelength λ, symbol: X(λ);
– or that the quantity referred to is the spectral concentration of X, symbol: X = dX/dλ.
λ
X is also a function of λ and in order to stress this, it may be written X (λ) without any change
λ λ
of meaning
[SOURCE: IEC 60050-845:1987, 845-01-16, modified – Note deleted.]
3.6
irradiance
quotient of the radiant flux dφ incident on an element of the surface containing the point, by
e
the area dA of that element
2
Note 1 to entry: Irradiance is expressed in W/m .
[SOURCE: IEC 60050-845:1987, 845-01-37, modified – Domain and equivalent definition
deleted.]

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IEC 61228:2020 © IEC 2020 – 7 –
3.7
action spectrum
efficiency of monochromatic radiations for producing a specified phenomenon in a specified
system
[SOURCE: IEC 60050-845:1987, 845-06-14, modified – Definition revised.]
3.8
effective
adjective that, when applied to a quantity pertaining to electromagnetic radiation, indicates that
the quantity referred to is weighed according to a specified action spectrum
3.9
nominal value
approximate quantity value used to designate or identify a lamp
[SOURCE: IEC 60050-151:2001, 151-16-09, modified – Definition revised and note deleted.]
3.10
rated value
quantity value for a characteristic of a lamp for specified operating conditions
Note 1 to entry: The value and/or conditions are specified in this document or assigned by the manufacturer or
responsible vendor.
3.11
irradiance maintenance ratio
r
rated value of the ratio of the effective UV irradiance weighed according to the erythema action
spectrum (250 nm to 400 nm) at a specified time to initial values
3.12
initial value
electrical and radiometric characteristics measured at the end of a 5 h ageing period
3.13
maintenance code
description of the depreciation of the UV irradiance lamp during operation between 5 h and
500 h
4 General test conditions
4.1 Ageing
Before the initial measurements, lamps shall be aged for a period of 5 h ± 0,25 h.
The ageing shall be performed in accordance with Annex C.
4.2 Operating position
During measurement, lamps shall be operated in a horizontal position. Ageing is preferably in
a horizontal position; a vertical position may also be applied.
Single capped lamps shall be positioned such that the sensor sees both legs of the lamp
(see Figure 1). If the lamp has more than two limbs, the manufacturer or responsible vendor
shall specify the measurement position.

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Figure 1 – Measurement position of single capped lamps
NOTE The lamp orientation in appliances used for skin exposure to ultraviolet radiation (sunbeds) can differ from
the measuring position and hence the irradiance values can also differ.
4.3 Ambient temperature
The measurement shall be made in a draught-free atmosphere at an ambient temperature of
25 °C ± 1 °C.
If applicable, lamps may also be measured under conditions different from the above standard
ambient temperature conditions to establish the optimum UV irradiance, as described in
Annex A.
4.4 Test voltage
All measurements shall be made by applying the test circuit in Figure 2 (preheat start).

Figure 2 – Test circuit
The test voltage applied to the circuit shall be 110 % of the rated voltage of the reference ballast
with the starter circuit continuously closed.
The AC mains/supply voltage for the irradiance measurements shall maintain a tolerance of
±0,2 %.
The AC mains/supply frequency shall be 50 Hz ± 0,1 % or 60 Hz ± 0,1 % for each measurement.

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IEC 61228:2020 © IEC 2020 – 9 –
4.5 Ballast
Lamps shall be operated with a ballast that generates electrical values for the operation of the
respective lamp that match the values given by the corresponding lamp manufacturer or
responsible vendor.
The ballast shall be operated at a frequency of 50 Hz or 60 Hz. The frequency shall be specified
for each measurement.
5 Test requirements
5.1 General
Spectroradiometric measurements shall be made in accordance with the relevant
recommendations of the CIE (International commission on illumination), as given in CIE 63.
NOTE 1 Additional information about UV measurements is given in Annex B of IEC 62471:2006.
NOTE 2 Additional requirements for electrical measurements are given in Annex B of IEC 60081:1997, Annex B of
IEC 60081:1997/AMD2:2003, Annex B of IEC 60081:1997/AMD4:2010, Annex B of IEC 60081:1997/AMD5:2013 and
Annex B of IEC 60901:1996, Annex B of IEC 60901:1996/AMD2:2000, Annex B of IEC 60901:1996/AMD5:2011 and
Annex B of IEC 60901:1996/AMD6:2014.
5.2 Spectroradiometric measuring system
Lamps shall be measured in a spectroradiometer system to obtain the spectral irradiance.
The system input optics shall have a cosine response to accurately measure irradiance.
The spectroradiometer shall have a bandwidth at a given wavelength not exceeding 2,5 nm and
its wavelength resolution shall not be higher than 1 nm.
The distance between sensor and lamp axis, D , shall be (25 ± 0,5) cm (see Figure 1).
sensor
NOTE A bandwidth at a given wavelength of 1 nm is preferred for greater measurement accuracy in cases where a
rapid change of the spectral irradiance occurs within a small bandwidth area.
6 Measurement and evaluation procedure
6.1 Measurement
6.1.1 General
The spectral irradiance shall be measured at intervals of 1 nm from 250 nm to 400 nm. Under
the test conditions, the lamp power, current and voltage shall be recorded. The lamp shall be
in stable electric and radiometric conditions.
6.1.2 Double capped fluorescent UV Lamps
Double capped UV fluorescent lamps shall be operated during measurement such that the lamp
axis is at the same height as the centre of the entrance aperture of the sensor. The sensor shall
be placed in front of the middle of the lamp (see Figure 1).
Reflector lamps shall be operated such that the non-reflecting side is directed towards the
entrance aperture of the spectroradiometer. Lamps having a portion with no phosphor layer
shall be positioned, such that the uncoated portion is directed centrally towards the entrance
aperture of the spectroradiometer.

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UV Lamps having more than one phosphor layer along the lamp axis (see Figure 3) shall be
measured in front of the middle of that layer, which shows the highest erythema effective
irradiance.
NOTE For determining the layer showing the highest erythema effective irradiance, a spectral broad band
radiometer can be used.

The drawing shows three layers.
Figure 3 – Location of measurement points on lamps
with more than one layer
6.1.3 Single capped fluorescent UV Lamps
Single capped UV fluorescent lamps shall be operated during measurement such that the
middle of the lamp bulb is at the same height as the centre of the entrance aperture of the
sensor.
Single capped UV fluorescent lamps shall be operated during measurement such that both
limbs have the same distance to the centre of the entrance aperture of the spectroradiometer
(see 4.2 and Figure 1).
For single capped fluorescent UV lamps having
...

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