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BS EN IEC 61000-4-2:2025 Electromagnetic compatibility (EMC) - Testing and measurement techniques. Electrostatic discharge immunity test, 2025
- undefined [Go to Page]
- European foreword
- Endorsement notice
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and abbreviated terms [Go to Page]
- 3.1 Terms and definitions
- 3.2 Abbreviated terms
- 4 General
- 5 Test levels
- 6 Test equipment [Go to Page]
- 6.1 Overview
- Tables [Go to Page]
- Table 1 – Test levels
- 6.2 ESD generator [Go to Page]
- 6.2.1 General
- Figures [Go to Page]
- Figure 1 – Simplified diagram of the ESD generator
- Figure 2 – Ideal contact discharge current waveform at 4 kV [Go to Page]
- 6.2.2 General characteristics
- Table 2 – General ESD generator parameters
- Table 3 – Discharge current waveform parameters
- 6.3 Calibration of the characteristics of the ESD generator [Go to Page]
- 6.3.1 General
- Figure 3 – Contact discharge tip of the ESD generator
- Figure 4 – Air discharge tip of the ESD generator [Go to Page]
- 6.3.2 Equipment required for ESD generator calibration
- 6.3.3 Setup for ESD generator current waveform calibration
- 6.3.4 Procedure for the ESD generator calibration
- Figure 5 – Arrangement for calibration of ESD generator performance
- 7 Test setup [Go to Page]
- 7.1 General
- 7.2 Test equipment [Go to Page]
- 7.2.1 General
- 7.2.2 Verification of the ESD test equipment
- 7.3 Test setup for tests performed in laboratories [Go to Page]
- 7.3.1 General
- 7.3.2 Test conditions
- 7.3.3 Table-top equipment
- 7.3.4 Floor-standing equipment
- Figure 6 – Example test setup for table-top equipment [Go to Page]
- 7.3.5 Particular requirements for ungrounded equipment
- Figure 7 – Example test setup for floor-standing equipment
- Figure 8 – Example test setup for ungrounded table-top equipment
- 8 Test procedure [Go to Page]
- 8.1 General
- 8.2 Laboratory reference conditions [Go to Page]
- 8.2.1 Climatic conditions
- Figure 9 – Example test setup for ungrounded floor-standing equipment [Go to Page]
- 8.2.2 Electromagnetic conditions
- 8.3 Execution of the test [Go to Page]
- 8.3.1 EUT exercising
- 8.3.2 Direct application of discharges to the EUT
- 8.3.3 Indirect application of the discharge
- 9 Test report
- Annex A (informative) Explanatory notes [Go to Page]
- A.1 General considerations
- A.2 Influences of the environmental conditions on the levels of charge
- A.3 ESD phenomenon from charged human body
- Figure A.1 – Typical maximum values of electrostatic voltages to which operators and materials can be charged while operating in different environments outside an electrostatic protective area
- A.4 Air discharge phenomena
- A.5 Variations in air discharge
- A.6 Temperature and humidity of air discharge
- A.7 Relevance of contact discharge test
- A.8 Selection of test levels
- Table A.1 – Guidelines for the selection of the air discharge test levels from the human body
- A.9 Selection of elements for the ESD generator
- A.10 Rationale related to the generator specification
- A.11 Rationale related to the waveform specification
- Annex B (normative) Calibration of the current measurement system [Go to Page]
- B.1 Current target specification – input impedance
- B.2 Current target specification – insertion loss [Go to Page]
- B.2.1 Measurement chain
- B.2.2 Target adapter line
- B.2.3 Determining the insertion loss of a current target-attenuator-cable chain
- Figure B.1 – Example target adapter line attached to current target
- Figure B.2 – Example front side of a current target
- B.3 Determining the low-frequency transfer impedance of a target-attenuator cable chain
- Figure B.3 – Example measurement of the insertion loss of a current target-attenuator-cable chain
- Figure B.4 – Example circuit diagram to determine the low-frequency system transfer impedance
- Annex C (informative) Example of a calibration target meeting the requirements of Annex B [Go to Page]
- Figure C.1 – Mechanical drawing of a coaxial target showing central brass part
- Figure C.2 – Mechanical drawing of a coaxial target showing PCB and resistors
- Figure C.3 – Mechanical drawing of a coaxial target showing PTFE part
- Figure C.4 – Mechanical drawing of a coaxial target showing the cover
- Figure C.5 – Mechanical drawing of a coaxial target showing the mechanical assembly
- Annex D (informative) Radiated fields from human metal discharge and ESD generators [Go to Page]
- D.1 Overview of the processes causing intended and unintended fields [Go to Page]
- D.1.1 General
- D.1.2 Human ESD
- D.1.3 ESD generator
- D.2 EUT response to ESD testing
- D.3 Transient fields of ESD reference event
- Figure D.1 – Electric field of a real human, holding metal, charged at 5 kV measured at 0,1 m distance and for a spark length of 0,7 mm
- Figure D.2 – Magnetic field of a real human, holding metal, charged at 5 kV, measured at 0,1 m distance and for a spark length of approximately 0,5 mm
- D.4 Induced voltage in a small loop
- Figure D.3 – Semi-circle loop on the ground plane
- Figure D.4 – Voltages induced in a semi-loop
- D.5 Measuring radiated fields due to an ESD by using commercial field probes and ESD generators
- Figure D.5 – Example test setup to measure radiated ESD fields
- Figure D.6 – Comparison between measured (solid line) and calculated numerically (dot line) voltage drop on the loop for a distance of 45 cm
- Figure D.7 – Comparison between calculated H-field from measured data (solid line) and H-field calculated by numerical simulation (dotted line) for a distance of 45 cm
- D.6 Simple procedure to estimate radiated fields and voltages induced by ESD generators
- Figure D.8 – Structure illuminated by radiated fields and equivalent circuit
- Figure D.9 – Radiated H-fields
- Annex E (informative) Selection of test points and number of pulses [Go to Page]
- E.1 General
- E.2 Exclusions
- E.3 Guidance for direct contact discharges
- E.4 Guidance for air discharges
- Table E.1 – Cases for application of ESD on connectors
- E.5 Guidance for indirect discharges
- E.6 Investigatory testing
- E.7 Number of pulses for direct contact discharges
- Annex F (informative) Measurement uncertainty (MU) considerations [Go to Page]
- F.1 General
- F.2 Legend for contact and air discharge current waveform parameters
- F.3 Limitations
- F.4 Calculation of a coverage interval
- F.5 Uncertainty contributors to the ESD current discharge measurement uncertainty
- F.6 Uncertainty of the ESD generator current discharge measurement [Go to Page]
- F.6.1 General
- F.6.2 Rise time of the ESD current discharge
- Table F.1 – Example uncertainty budget for ESD current discharge rise time (tr) [Go to Page]
- F.6.3 First peak of the ESD current discharge
- Table F.2 – Example uncertainty budget for the first peak of the ESD current discharge (Ip1) [Go to Page]
- F.6.4 Second peak of the ESD current discharge
- Table F.3 – Example uncertainty budget for the second peak of the ESD current discharge (Ip2) [Go to Page]
- F.6.5 ESD current discharge at 30 ns or 60 ns
- Table F.4 – Example of uncertainty budget for the ESD current discharge at 30 ns (I30)
- Table F.5 – Example uncertainty budget for the ESD current discharge at 60 ns (I60) [Go to Page]
- F.6.6 Further MU contributions to time measurements
- F.7 Rise time of the step response and bandwidth of the frequency response of the measuring system
- F.8 Impulse peak distortion due to the limited bandwidth of the measuring system
- Table F.6 – α factor – Formula (F.3) – of different unidirectional impulse responses corresponding to the same bandwidth of the system B
- F.9 Application of uncertainties in the ESD compliance criterion
- Annex G (informative) Test setup for post-installation tests [Go to Page]
- Figure G.1 – Example of test setup for floor-standing equipment, post-installation tests
- Annex H (normative) Escalation strategy [Go to Page]
- H.1 Variations in EUT performance
- H.2 Escalation strategy
- Annex I (normative) Additional or further test setup for particular kind of equipment [Go to Page]
- I.1 Wall-mounted equipment
- Figure I.1 – Example of test setup for wall-mounted equipment on non-conductive surfaces
- I.2 Wearable devices
- Figure I.2 – Example of test setup for wall-mounted equipment on conductive surfaces
- Annex J (informative) Wearable devices [Go to Page]
- J.1 General
- J.2 Additional experimental test procedures for a wearable device
- Figure J.1 – Example of air discharge current waveforms for locations on a 1 kV charged human body, discharged via an air discharge tip
- Table J.1 – Example of waveform parameters to characterize discharge currents of the ESD generator, hand-held and body-mounted electrodes with a 1 kV charged voltage
- Annex K (informative)Evaluation of test results
- Bibliography [Go to Page]