IEC TR 63381:2025
(Main)Application of IEC 60335‑2‑27 for field inspections of UV emission of UV appliances
Application of IEC 60335‑2‑27 for field inspections of UV emission of UV appliances
IEC TR 63381:2025 brings clarification and guidance concerning the assessment of the UV emission output of UV appliances in the field with respect of the type-testing requirements of IEC 60335‑2‑27:2024, Clause 32.
General Information
Standards Content (Sample)
IEC TR 63381 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Application of IEC 60335‑2‑27 for field inspections of UV emission of UV
appliances
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IEC TR 63381 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Application of IEC 60335‑2‑27 for field inspections of UV emission of UV
appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120; 97.170 ISBN 978-2-8327-0274-1
– 2 – IEC TR 63381:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General conditions for the tests . 7
4.1 Paperwork check . 8
4.1.1 UV fluorescent lamps . 8
4.1.2 Other lamps . 8
4.1.3 Filters . 8
4.1.4 Ballasts . 8
4.1.5 Reflectors . 8
4.1.6 Classification . 8
4.2 On-site survey with hand-held UV radiometer . 8
4.2.1 Hand-held UV radiometer survey . 8
4.2.2 Classification . 9
4.3 On-site measurement with spectro-radiometer . 9
4.3.1 Spectro-radiometer measurements . 9
4.3.2 Classification . 9
4.4 Laboratory test . 9
4.4.1 Laboratory test method . 9
4.4.2 Classification . 9
5 Classification . 9
Annex A (informative) Guideline for the use of handheld UV radiometer . 10
Annex B (informative) Guideline for rounding of radiation measurements . 11
Annex C (informative) Example of requirements to laboratories for on-site field
measurements . 12
Bibliography . 13
Table B.1 – Limits of effective irradiance and their rounding . 11
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
APPLICATION OF IEC 60335-2-27 FOR FIELD INSPECTIONS
OF UV EMISSION OF UV APPLIANCES
FOREWORD
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IEC TR 63381 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is a Technical Report.
The text of this Technical Report is based on the following documents:
Draft Report on voting
61/7339/DTR 61/7388/RVDTR
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Report is English.
– 4 – IEC TR 63381:2025 © IEC 2025
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
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specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
INTRODUCTION
IEC 60335-2-27 provides requirements on the emission of UV radiation by UV appliances as
covered by its scope. These requirements are intended for determining compliance during the
type-testing of the products in a laboratory environment.
Later, market surveillance authorities would like to check this compliance at business locations
in their territory, since the UV emission of these products can be influenced in different ways
and health aspects can be ignored due to commercial interests, or just by a lack of knowledge.
The exchange of emitters can have an especially significant influence on the emission character
of UV appliances. Fluorescent UV lamps and high-pressure metal halide lamps are showing
strong ageing behaviour and are replaced for performance reasons at least every 1 000 hours.
IEC 60335-2-27 introduced in connection with IEC 61228 the so-called X/Y lamp equivalency
code for UV fluorescent lamps and a marking on the appliances which lamps, with which code
are to be used with the appliance. Additionally, IEC 60335-2-27:2024, 7.12 states:
The instructions for UV appliances shall include the substance of the following:
– identification of components that can influence the ultraviolet radiation, such as filters and
reflectors;
– identification of replaceable UV emitters and a statement that they are only to be replaced
by types marked on the appliance. For fluorescent UV lamps for tanning, it shall be stated
that they are only to be replaced by types marked with an equivalency code, the UV
component of which falls within the UV component equivalency code range that is marked
on the appliance. In this case, an example of the equivalency code shall be given and the
UV component aspect of the fluorescent UV lamp for tanning equivalency code shall be
explained.
This information given by the manufacturer gives a good first attempt to control the UV emission
of a UV appliance in the market.
Unfortunately, there are external conditions which can additionally influence the UV emission
of UV appliances, so a market surveillance authority would like to measure a UV appliance in
the market. Due to the weight of the appliances, it cannot be moved into a laboratory.
So, the measurement will be performed under non-laboratory conditions, which can include:
– different and maybe instable line voltage,
– different and instable temperature,
– emitters of an unknown aging status.
Additionally, the accurate measurement equipment as requested by IEC 60335-2-27 is
– quite heavy (could be about 50 kg), and
– difficult to handle. Most of the accurate double-monochromators would need an acclimation
and therefore calibration at the measurement location.
– Measuring UV emission in a precise manner is quite slow. It would need some hours to
perform a high precision measurement.
– 6 – IEC TR 63381:2025 © IEC
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