This part of IEC 61547 describes an objective light flickermeter, which can be applied for the following purposes:

measuring the intrinsic performance of all lighting equipment without the application of voltage fluctuations in terms of illuminance flicker; during this measurement, the lighting equipment is supplied with a stable mains;
testing the immunity performance of lighting equipment against (unintentional) voltage fluctuation disturbance on the AC mains in terms of illuminance flicker; during this test a set of defined voltage fluctuations are applied to the AC mains and the immunity of the lighting equipment to the disturbance is determined.

Apart from the above two purposes, the immunity performance of lighting equipment can also be tested against intentional voltage fluctuation on the AC mains arising for example from mains signalling. This is however not described in further detail in this document.

NOTE 1 IEC 61000-4-13:2015 [24] provides guidance regarding test levels and frequencies for mains signalling.

The object of this document is to establish a common and objective reference for evaluating the performance of lighting equipment in terms of illuminance flicker. Temporal changes in the colour of light (chromatic flicker) are not considered in this test.

This method can be applied to lighting equipment which is within the scope of IEC technical committee 34, such as lamps and luminaires, intended for connection to a low voltage electricity supply. Independent auxiliaries such as drivers can also be tested by application of a representative light source to that auxiliary.

The objective light flickermeter and voltage fluctuation immunity method described in this document are based on the IEC 61000-3-3 standard for voltage fluctuation limits and the flickermeter standard IEC 61000-4-15.

The objective light flickermeter described in this document can be applied to objectively assess flicker of lighting equipment that is powered from any type of source, AC mains, DC mains, battery fed or fed through an external light level regulator. The specific voltage fluctuation immunity test method described in this document applies to lighting equipment rated for 120 V AC and 230 V AC, 50 Hz and 60 Hz.

NOTE 2 The principle of the method can be applied for other nominal voltages and frequency ratings.

PDF Catalog

PDF Pages	PDF Title
2	undefined
4	CONTENTS
7	FOREWORD
9	INTRODUCTION
10	1 Scope 2 Normative references
11	3 Terms, definitions, abbreviated terms and symbols 3.1 Terms and definitions
12	3.2 Abbreviated terms
13	3.3 Symbols 4 General
14	Figures Figure 1 – Full EMC approach for mains voltage fluctuations
15	5 Light flickermeter 6 Voltage fluctuation disturbance signal 6.1 General
16	6.2 Mains signal parameters Figure 2 – Illustration of the mains test signal including a rectangular modulated voltage fluctuation (see Equation (1))
17	6.3 Disturbance signal parameters and test levels
18	7 Test setup and equipment 7.1 General Tables Table 1 – Voltage fluctuations – Test specification of voltage fluctuations applied at input AC mains 120/230 V and 50/60 Hz
19	7.2 Test voltage 7.3 Optical test environment Figure 3 – Block diagram voltage-fluctuation immunity test
20	7.4 Light sensor and amplifier 7.5 Signals to be measured 7.6 Signal processing 7.6.1 Anti-aliasing filter
21	7.6.2 Sampling frequency 7.6.3 Signal resolution
23	8 Verification procedure 8.1 General 8.2 Light flickermeter Figure 4 – Example of a recorded mains voltage fluctuation and illuminance signal of a 60 W incandescent lamp
24	8.3 Mains voltage parameters without modulation 8.3.1 Nominal voltage level 8.3.2 Mains frequency 8.4 Voltage fluctuation level 8.4.1 General 8.4.2 Option 1: measure the actual modulation frequencies and voltage levels 8.4.3 Option 2: measure PstV values using a flickermeter
25	8.5 Light sensor and amplifier 8.6 Test environment 8.7 Light flicker noise
26	9 Test procedure 9.1 General
27	9.2 Measuring the intrinsic flicker performance Table 2 – Guidance for PstLM testing
28	9.3 Testing the flicker immunity against voltage fluctuations 9.4 Dimmer compatibility testing Figure 5 – Measuring PstLM Figure 6 – Measuring PstLM (I) Figure 7 – Dimmer compatibility testing
29	9.5 Controlgear testing 10 Conditions during testing Figure 8 – Controlgear testing
30	11 Evaluation of the test result 12 Test report
31	Annexes Annex A (informative) Specification of the light flickermeter A.1 Voltage flickermeter modifications Figure A.1 –Structure of the IEC 61000-4-15 flickermeter that uses voltage as input Figure A.2 – Structure of the light flickermeter based on a modified voltage flickermeter
32	A.2 Specification of the light flickermeter A.2.1 General A.2.2 Block a: illuminance adapter A.2.3 Block b: weighting filters
33	A.2.4 Block c: squaring multiplier, sliding mean filter and scaling A.2.5 Block d: statistical analysis
34	A.3 Verification of the light flickermeter Table A.1 – Test specification of illuminance fluctuations for lightmeter classifier
35	A.4 Example of PstLM implementation in MATLAB® Figure A.3 – Flickermeter response to different waveshapes
36	Annex B (informative) Uncertainty considerations B.1 General B.2 General symbols B.3 Measurand B.4 Influence quantities
37	Table B.1 – Influence quantities and their recommended tolerances
38	B.5 Uncertainty budget
39	Table B.2 – Uncertainty budget of the voltage fluctuation immunity test
40	Annex C (informative) Examples of test results of lighting equipment C.1 Test without voltage fluctuations (PstLM) C.2 Test with (intentional) voltage fluctuations PstLM (I) Table C.1 – Numerical results PstLM calculations for three EUTs without voltage modulation Table C.2 – Numerical results PstLM (I) calculations for three EUTs with voltage modulation
41	Figure C.1 – Graphical PstLM (I) results for three EUTs with rectangular modulation at five frequencies (PstV=1)
42	Figure C.2 – EUT1: recorded signals (no mains voltage modulation)
43	Figure C.3 – EUT1: recorded signals (with modulation)
44	C.3 Test under dimming conditions Figure C.4 – EUT2: relative illuminance – Mains voltage modulation d = 0,407 % at 13,5 Hz (PstV) Figure C.5 – EUT3: relative illuminance – Mains voltage modulation d = 0,407 % at 13,5 Hz (PstV)
45	Figure C.6 – Graphical PstLM(C) results for four EUTs under dimming conditions Table C.3 – Numerical results PstLM (C) calculations for four EUTs under dimming conditions
46	Annex D (informative) Guidance for PstLM testing based on test type Table D.1 – Guidance for testing based on test conditions
47	Bibliography

Status	Definitive
Pages	50
Publication Date	2020-07-09
ISBN	978 0 539 04312 9
Standard Number	PD IEC TR 61547-1:2020
Title	Equipment for general lighting purposes. EMC immunity requirements – Objective light flickermeter and voltage fluctuation immunity test method
Identical National Standard Of	IEC TR 61547-1:2020
Replaces	PD IEC/TR 61547-1:2017
Descriptors	Testing conditions, Electric current, Performance, Lighting systems, Electrostatics, Electromagnetic fields, Luminaires, Electrical testing, Lighting equipment, Grades (quality), Electromagnetic radiation, Interference suppression, Electrical equipment, Conformity, Surges (electrical), Electromagnetic compatibility, Electric lamps
Publisher	BSI
Committee	CPL/34
ICS Codes	29.140.20 - Incandescent lamps