Transcript The New CIE International Standard Test Method for LED

The New CIE Standard Test Method for
LED Lamps, LED Luminaires and LED
Modules: CIE S 025/E:2015
Tony Bergen
Technical Director, Photometric Solutions International
Secretary, CIE Division 2
Australian National Representative, CIE Division 2
Contents
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Introduction to the CIE
Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion
Introduction
• The CIE is the International Commission on
Illumination
• Abbreviated to CIE from its French form:
Commission Internationale de l'Eclairage
• The global peak body on matters relating to the
science and art of lighting
• Responsible for creating and maintaining
standards and technical reports within the fields
such as:
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vision and colour;
photometry and radiometry;
lighting and signalling; and
photobiology
Introduction
• Has seven scientific divisions:
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Division 1: Vision and Colour;
Division 2: Measurement of Light and Radiation;
Division 3: Interior Environment and Lighting Design;
Division 4: Lighting and Signalling for Transport;
Division 5: Exterior Lighting and Other Applications;
Division 6: Photobiology and Photochemistry;
Division 8: Image Technology
• Each of these divisions has Technical
Committees which carry out the scientific work
• CIE also has national committees with voting
rights at a general assembly and which support
the CIE’s interests within their jurisdiction
Introduction
• CIE experts are on the BIPM’s
Consultative Committee on
Photometry and Radiometry
and provide advice in relation to
the SI unit for light:
– the Candela.
• CIE has agreements with ISO
and IEC: these agreements
recognise the CIE as an official
standardising body for light and
lighting matters.
Introduction
• Foundation work for CIE’s formation
started in 1901, but…..
• CIE’s Statutes have operative date of
September 1913, which means that…..
• CIE turned 100 two years ago!
x100!
Contents
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Introduction to the CIE
Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion
Need for a Standard
• Currently (previously) there are many
different test methods used in different
areas around the world:
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IESNA LM-79-08
EN test methods
IEC 62722, IEC 62612, IEC 62717
JIS C 7801 Am.1: 2012, JIS C 8152-2
Chinese CQC and GB standards
etc.
Need for a Standard
From a presentation by Yoshi
Ohno for the IEA 4E SSL Annex
Need for a Standard
AIM
A unified global standard for
harmonisation of testing of LEDs
and SSL products
Need for a Standard
From a presentation by Yoshi
Ohno for the IEA 4E SSL Annex
Contents
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Introduction to the CIE
Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion
Development of the Standard
• A CIE Division 2 Technical Committee
worked on the standard:
– TC2-71: CIE Standard on Test Methods for
LED Lamps, luminaires and modules
• The TC has 37 members from 16
countries in 5 continents
• Working closely with CEN-TC169-WG7
• Draft published in September 2014
• Final version published in March 2015
Development of the Standard
• Has had significant difficulties establishing
a consensus amongst the stakeholders:
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Public testing labs;
LED/Lighting manufacturers;
Test equipment manufacturers;
Regulatory bodies;
NMIs;
etc…
Development of the Standard
• Also needed a consensus with the CENTC169-WG7 working group, whom we
were partnering in the development
– (It is technically identical to the CEN standard
EN13032-4, which will be released soon)
Development of the Standard
• There have been some robust
discussions and disagreements
• Difficulties were largely overcome so that
we could move forward to begin the
publication phase
Contents
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Introduction to the CIE
Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion
Features of the Standard
• The draft Standard defines standard test
conditions and requirements for
equipment
• It covers electric, photometric and
spectral/colorimetric properties
• It covers LED lamps, LED luminaires and
LED modules
• Testing should ideally be performed
according to the standard test conditions
Features of the Standard
• Some of the standard test conditions have
tolerances to take into account practical
laboratory situations
• Example 1:
– The ambient test temperature should be 25°C
– In practice it can be in the range 25 ± 1.2 °C
(including uncertainty in measurement of
temperature)
• Example 2:
– The air should be still
– In practice it is allowed to be up to 0.25 m/s
(including uncertainty in measurement of air
speed)
Features of the Standard
• If the standard test conditions are not met,
then a correction must be made
• For example:
– A goniophotometric test is made with ambient
temperature of 23 ± 0.5 °C
– This is outside the range 25 ± 1.2 °C
– An additional test must be made, eg: with the
device in a temperature controlled chamber, to
correct the measured value to what it would be if
the test were performed at 25°C
Features of the Standard
• The equipment and electrical supply also
have tolerances
• Examples:
– The test voltage shall be measured at the supply
terminals of the DUT, not at the output terminals
of the power supply
– Tolerance interval: ± 0.4 % for RMS AC voltage;
0.2 % for DC voltage.
– The total harmonic content of the voltage
waveform shall not exceed 1.5 % of the
fundamental (except if PF > 0.9, then it shall be
less than 3 %).
Features of the Standard
• The standard covers measurement using:
– Integrating spheres;
– Goniophotometers;
• Near-field gonio allowed if validated against a far field gonio
• The DUT can be tested in an orientation other than its designed burning
position, provided corrections are made
– Luminance meters, including ILMDs;
– Spectroradiometers.
Features of the Standard
• Measurements must be traceable
– Equipment must be properly calibrated
– Traceability chain must be maintained back to a
national laboratory (National Measurement Institute)
• All test reports must contain a statement of
uncertainty of measurement
– The standard gives a guide for how to make an
uncertainty budget
• The Standard really just focuses on quality and
compatibility of measurement, and not product
performance as such.
What it covers
• The draft Standard covers:
– Environmental conditions (air temperature, air movement,
stray light);
– Electrical supply and quality;
– Measurement instruments (photometric & electrical);
– Lamp mounting / operating position;
– Lamp Operating Conditions;
– Lamp stabilisation;
– Initial total luminous flux;
– Centre beam and beam angles;
– Partial luminous flux (useful lumens);
– Test distance for far-field goniophotometry;
– Colour and chromaticity measurements.
What it doesn’t cover
• The draft Standard does not cover or partially covers:
– Dimmable, internal feedback, adjustable colour, adjustable white,
multicolour;
– Maintained luminous flux;
– Omni-directional assessment;
– Maintained colour measurements;
– Harmonics & EMC;
– Start time / activation time;
– Switch withstand;
– Lamp Life;
– Temperature cycling shock;
– Endurance;
– Photobiological hazards;
– Flicker;
– Dimmer compatibility.
• Note: Many of these are already covered satisfactorily in
other Standards.
Contents
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Introduction to the CIE
Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion
Conclusions
• The CIE is the world’s premier scientific
organisation responsible for matters relating to
light and lighting
• Celebrated its official centenary in 2013
• CIE has developed an International Standard
Test Method for LED Lamps, LED Luminaires
and LED Modules
• This will enable accurate and repeatable
measurements for harmonisation and
intercomparison around the globe
Thank you
for your kind attention
Tony Bergen
Technical Director
Photometric Solutions International
Factory Two, 21-29 Railway Avenue
Huntingdale, Vic, 3166, Australia
Tel: +61 3 9568 1879
Fax: +61 3 9568 4667
Email: [email protected]
Web: www.photometricsolutions.com