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
---------------------- Page: 3 ----------------------
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)
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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
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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
---------------------- Page: 7 ----------------------
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
– 4 – IEC 61228:2020 © IEC 2020

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
– 6 – IEC 61228:2020 © IEC 2020

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.

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

the area dA of that element
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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SIST EN IEC 61228:2021
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

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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SIST EN IEC 61228:2021
– 8 – IEC 61228:2020 © IEC 2020
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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SIST EN IEC 61228:2021
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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SIST EN IEC 61228:2021
– 10 – IEC 61228:2020 © IEC 2020

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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