EMC of instrumentations systems

Goals

The objectives of the training EMC of instrumentations systems :

Upon completion of this training course, participants will be able to master the wiring and implementation of sensitive measurement systems in research and industry.

The goal of this training is to:
• Be able to identify and understand EMC coupling
• Be able to identify sources of interference
• Be able to apply low-frequency protection methods
• Be able to apply high-frequency protection methods
• Know how to adapt on-site EMC investigation and measurement methods

Session dates:
• from 01/06/2027 to 03/06/2027 - Trappes
• from 16/11/2027 to 18/11/2027 - Illkirch
Contact: +33 04 76 49 76 76 | formation@sopemea.fr

Financial details:
• Financial assistance options based on your status (Company, Employee, Job Seeker) through your OPCO, France Travail, or any other funding agency
• Not eligible for the Professional Training Account (CPF)

Program

1 - Introduction
• What is EMC?
• Representation of a sinusoidal and trapezoidal signal
• Time-frequency relationship
• Definition and characteristics of an electromagnetic wave
• Relationships between conduction and radiation
• Use of decibels
• Common mode/differential mode
• Low/high frequency limit
• Envelope detection
• Digital circuit interference


2 - The 6 types of coupling
• Ground coupling
• Conductor impedance
• Capacitive coupling between board and ground
• Electrostatic shield
• Crosstalk coupling
• Magnetic field coupling
• Loop voltages
• Electric field coupling
• Metal plane shielding


3 – Earth and ground
• Definitions of earth and ground
• Role of the earth network
• Earth resistance
• Safety conductors
• Ground network
• Equipotentiality and EMC
• Ground loops and between grounds
• Problems with star grounding
• Ground meshing


4 – LF disturbance sources
• The 4 low-voltage neutral schemes
• Orders of magnitude of currents in grounds
• Sources of 50 Hz magnetic fields
• Radiation from a transformer
• Sources of 50 Hz electric fields
• Effects of lightning on equipment


5 – HF disturbance sources
• Radiation from radio transmitters
• HF industrial equipment
• Switching converters
• Variable speed drives
• Dry contact bounce


6 – Low frequency protection
• Common mode rejection by isolation
• Symmetrical differential connection
• Equipment with guard in noisy environment
• Isolation transformer
• Optocouplers
• Effect of a filter on a pulse
• Surge arresters
• Necessity of surge arresters
• Choice of surge arrester type
• Examples of surge arresters
• Implementation of surge arresters


7 – Filtering of HF disturbances
• Different types of filter
• Different low-pass filter diagrams
• Use of ferrite cores
• Common mode choke
• Mains filters
• Rules for installing a mains filter
• HF filtering of signals


8 – Shielded cables
• Transfer impedance
• Principle of the reducing effect
• Measuring the reducing effect
• Connecting shielded cables
• Special case of low-frequency common mode
• Over-shielding
• Reducing effect of cable trays
• Connecting cable trays
• Wiring very low-level sensors
• Thermocouples
• Connecting shielded connectors
• Signal classification
• Wiring rules


9 – Electrical and EMC measurements
• Resistance measurement
• Characteristic impedance of a line
• Measurement of the characteristic impedance of a line
• Losses in coaxial cables
• Passive oscilloscope probe
• Active voltage probes
• Measurement of common mode voltages between grounds
• Construction of an HF current clamp
• Conducted immunity test on site