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Grounding & Shielding for EMC Summary Grounding and shielding are two of the most effective techniques for combating EMI. This three-day course is designed for engineers, technicians, and operators, who need an understanding of all facets of grounding and shielding at the circuit, PCB, box, equipment and/or system levels. The course offers a discussion of the trade-offs for EMI control through grounding and shielding at all levels. Hardware demonstrations of the effect of various compromises and resulting grounding and shielding effectiveness are provided. The compromises that are demonstrated include aperture and seam leakage, and conductor penetrating the enclosure. The hardware demonstrations also include incorporating various "fixes" and illustrating their impact. Each attendee will receive a copy of Bill Duff’s new text, Designing Electronic Circuits for EMC. Instructor Dr. William G. Duff (Bill) received a BEE degree from George Washington University, a MSEE degree from Syracuse University, and a DScEE degree from Clayton University. He is internationally recognized as a leader in the development of engineering technology for achieving EMC in communication and electronic systems. He has more than 40 years of experience in EMI/EMC analysis, design, test and problem solving for a wide variety of communication and electronic systems. He has extensive experience in applying EMI mitigation techniques to "fix" EMI problems at the circuit, equipment and system levels. Bill is a past president of the IEEE EMC Society and a past Director of IEEE Division IV, Electromagnetics and Radiation. He served a number of terms on the EMC Society Board of Directors. Bill has received a number of IEEE awards including the Lawrence G. Cumming Award for Outstanding Service, the Richard R. Stoddard Award for Outstanding Performance and a "Best Paper" award. He was elected to the grade of IEEE Fellow in 1981 and to the EMC Hall of Fame in 2010. Bill has written more than 40 technical papers and 5 books on EMC. He also regularly teaches seminar courses on EMC. He is a NARTE Certified EMC Engineer. What You Will Learn • Examples Of Potential EMI Threats. • Safety Grounding Versus EMI Control. • Common Ground Impedance Coupling. • Field Coupling Into or out of Ground Loops. • Coupling Relationships. • EMI Coupling Reduction Methods. • Victim Sensitivites. • Shielding Theory. • Electric vs Magnetic Field Shielding. • Shielding Compromises. • Trade-offs Between Shielding, Cost, Size, Weight,etc. January 31 - February 2, 2012 Columbia, Maryland May 1-3, 2012 Columbia, Maryland $1795 (8:30am - 4:00pm) "Register 3 or More & Receive $100 00 each Off The Course Tuition." Course Outline 1. Introduction. A Discussion Of EMI Scenarios, Definition Of Terms, Time To Frequency Conversion, Narrowband-Vs-Broadband, System Sensitivities. 2. Potential EMI Threats (Ambient). An Overview Of Typical EMI Levels. A Discussion Of Power Line Disturbances And A Discussion Of Transients, Including ESD, Lightning And EMP. 3. Victim Sensitivities And Behavior. A Discussion Of Victim Sensitivities Including Amplifier Rejection, Out-Of-Band Response, Audio Rectification, Logic Family Susceptibilities And Interference- To- Noise Versus Signal-To-Noise Ratios. 4. Safety Earthing/Grounding Versus Noise Coupling. An Overview Of Grounding Myths, Hard Facts And Conflicts. A Discussion Of Electrical Shock Avoidance (UL, IEC Requirements), Lightning Protection And Lightning Rods And Earthing. 5. Ground Common Impedance Coupling (GCM). A Discussion Of Practical Solutions, From PCB To Room Level. An Overview Of Impedance Of Conductors (Round, Flat, Planes), Class Examples, GCM Reduction On Single Layer Cards, Impedance Reduction, DC Bus Decoupling And Multilayer Boards. 6. GLC Reduction Methods. A Discussion Of Floating And Single-Point Grounds, Balanced Drivers And Receivers, RF Blocking Chokes, Signal Transformers And Baluns, Ferrites, Feed-Through Capacitors And Opto-Electronics. 7. Cable Shields, Balanced Pairs And Coax. A Discussion Of Cable Shields And Compromising Practices, Shielding Effectiveness, Field Coupling, Interactions Of Ground Loops With Balanced Pair Shields, Comprehensive Grounding Rules For Cable Shields, Flat Cables And Connector And Pigtail Contributions To Shielding Effectiveness. 8. Cable-To-Cable Coupling (Xtalk). A Discussion Of The Basic Model, Capacitive And Magnetic Couplings, A Class Example And How To Reduce Xtalk. 9. Understanding Shielding Theory. An Overview Of Near-Field E And H, Far-Field, How A Metal Barrier Performs And Reflection And Absorption. 10. Shielding Effectiveness (SE) Of Barriers. A Discussion Of Performance Of Typical Metals, Low- Frequency Magnetic Shields, Conductive Coatings/Metallized Plastics And Aircraft Composites (CFC). 11. Box Shielding. Leakage Reduction., Calculation Of Apertures SE, Combination Of Multiple Leakages, SE Of Screen Mesh, Conductive Glass, Honeycombs, Component Penetrations (Fuses, Switches, Etc.), And EMI Gaskets. 54 – Vol. 109 Register online at www.ATIcourses.com or call ATI at 888.501.2100 or 410.956.8805
Instrumentation for Test & Measurement Understanding, Selecting and Applying Measurement Systems Summary This three day course, based on the 690-page Sensor Technology Handbook, published by Elsevier in 2005 and edited by the instructor, is designed for engineers, technicians and managers who want to increase their knowledge of sensors and signal conditioning. It balances breadth and depth in a practical presentation for those who design sensor systems and work with sensors of all types. Each topic includes technology fundamentals, selection criteria, applicable standards, interfacing and system designs, and future developments. Instructor Jon Wilson is a Principal Consultant. He holds degrees in Mechanical, Automotive and Industrial Engineering. His 45-plus years of experience include Test Engineer, Test Laboratory Manager, Applications Engineering Manager and Marketing Manager at Chrysler Corporation, ITT Cannon Electric Co., Motorola Semiconductor Products Division and Endevco. He is Editor of the Sensor Technology Handbook published by Elsevier in 2005. He has been consulting and training in the field of testing and instrumentation since 1985. He has presented training for ISA, SAE, IEST, SAVIAC, ITC, & many government agencies and commercial organizations. He is a Fellow Member of the Institute of Environmental Sciences and Technology, and a Lifetime Senior Member of SAE and ISA. 1. Sensor Fundamentals. Basic Sensor Technology, Sensor Systems. 2. Application Considerations. Sensor Characteristics, System Characteristics, Instrument Selection, Data Acquisition & Readout. 3. Measurement Issues & Criteria. Measurand, Environment, Accuracy Requirements, Calibration & Documentation. 4. Sensor Signal Conditioning. Bridge Circuits, Analog to Digital Converters, Systems on a Chip, Sigma-Delta ADCs, Conditioning High Impedance Sensors, Conditioning Charge Output Sensors. 5. Acceleration, Shock & Vibration Sensors. Piezoelectric, Charge Mode & IEPE, Piezoelectric Materials & Structures, Piezoresistive, Capacitive, Servo Force Balance, Mounting, Acceleration Probes, Grounding, Cables & Connections. 6. Biosensors. Bioreceptor + Transducer, Biosensor Characteristics, Origin of Biosensors, Bioreceptor Molecules, Transduction Mechanisms. 7. Chemical Sensors. Technology Fundamentals, Applications, CHEMFETS. 8. Capacitive & Inductive Displacement Sensors. Capacitive Fundamentals, Inductive Fundamentals, Target Considerations, Comparing Capacitive & Inductive, Using Capacitive & Inductive Together. 9. Electromagnetism in Sensing. Electromagnetism & Inductance, Sensor Applications, Magnetic Field Sensors. 10. Flow Sensors. Thermal Anemometers, Differential Pressure, Vortex Shedding, Positive Displacement & Turbine Based Sensors, Mass Flowmeters, Electromagnetic, Ultrasonic & Laser Doppler Sensors, Calibration. 11. Level Sensors. Hydrostatic, Ultrasonic, RF Capacitance, Magnetostrictive, Microwave Radar, Selecting a Technology. 12. Force, Load & Weight Sensors. Sensor Types, Physical Configurations, Fatigue Ratings. 13. Humidity Sensors.Capacitive, Resistive & Thermal Conductivity Sensors, Temperature & Humidity Effects, Course Outline NEW! November 8-10, 2011 Columbia, Maryland March 27-29, 2012 Columbia, Maryland $1795 (8:30am - 4:30pm) "Register 3 or More & Receive $100 00 each Off The Course Tuition." What You Will Learn • How to understand sensor specifications. • Advantages and disadvantages of different sensor types. • How to avoid configuration and interfacing problems. • How to select and specify the best sensor for your application. • How to select and apply the correct signal conditioning. • How to find applicable standards for various sensors. • Principles and applications. From this course you will learn how to select and apply measurement systems to acquire accurate data for a variety of applications and measurands including mechanical, thermal, optical and biological data. Condensation & Wetting, Integrated Signal Conditioning. 14. Machinery Vibration Monitoring Sensors. Accelerometer Types, 4-20 Milliamp Transmitters, Capacitive Sensors, Intrinsically Safe Sensors, Mounting Considerations. 15. Optical & Radiation Sensors. Photosensors, Quantum Detectors, Thermal Detectors, Phototransistors, Thermal Infrared Detectors. 16. Position & Motion Sensors. Contact & Non-contact, Limit Switches, Resistive, Magnetic & Ultrasonic Position Sensors, Proximity Sensors, Photoelectric Sensors, Linear & Rotary Position & Motion Sensors, Optical Encoders, Resolvers & Synchros. 17. Pressure Sensors. Fundamentals of Pressure Sensing Technology, Piezoresistive Sensors, Piezoelectric Sensors, Specialized Applications. 18. Sensors for Mechanical Shock Technology Fundamentals, Sensor Types-Advantages & Disadvantages, Frequency Response Requirements, Pyroshock Measurement, Failure Modes, Structural Resonance Effects, Environmental Effects. 19. Test & Measurement Microphones. Measurement Microphone Characteristics, Condenser & Prepolarized (Electret), Effect of Angle of Incidence, Pressure, Free Field, Random Incidence, Environmental Effects, Specialized Types, Calibration Techniques. 20. Introduction to Strain Gages. Piezoresistance, Thin Film, Microdevices, Accuracy, Strain Gage Based Measurements, Sensor Installations, High Temperature Installations. 21. Temperature Sensors. Electromechanical & Electronic Sensors, IR Pyrometry, Thermocouples, Thermistors, RTDs, Interfacing & Design, Heat Conduction & Self Heating Effects. 22. Nanotechnology-Enabled Sensors. Possibilities, Realities, Applications. 23. Wireless Sensor Networks. Individual Node Architecture, Network Architecture, Radio Options, Power Considerations. 24. Smart Sensors – IEEE 1451, TEDS, TEDS Sensors, Plug & Play Sensors. Register online at www.ATIcourses.com or call ATI at 888.501.2100 or 410.956.8805 Vol. 109 – 55
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