Electromagnetic Compatibility Testing
”What happens if lightning strikes?”
EMI can be defined as electromagnetic energy which affects the functioning of an electronic device. Sources of EMI can sometimes be naturally occuring environmental events, such as electrical storms and solar radiation; but more often than not, the EMI source is another electronic device or electrical system. While EMI can be generated from any electronic device, certain equipment and components, as cellphones, welders, motors etc.
EMC is a measure of a device’s ability to operate as intended in its shared operating environment while, at the same time, not affecting the ability of other equipment within the same environment to operate as intended. Evaluating how a device will react when exposed to electromagnetic energy is one component of this, known as immunity (or susceptibility) testing. Measuring the amount of EMI generated by the device’s internal electrical systems – a process known as emissions testing – is another.
Both aspects of EMC are important design and engineering considerations in any system. Failing to properly anticipate the EMC of a device can have a number of negative consequences, including safety risks, product failure and data loss.
Every major market in the world limits radiated electric emissions, and the limitations apply to all products too. The screen you’re using to read this has undergone extensive EMC testing phases before making it all the way to you. All this works the other way around as well. If there are electromagnetic disturbances, will your device have sufficient grounding, or are there going to be errors or worse? Will your device be alright, even if we place it next to other electric devices? Are your emissions compliant with regional standards? No matter how perfectly you protect your electric product, it will emit electromagnetic interference.
- EMC Testing for Automotive Equipment
- EMC Testing for Appliances and Consumer Electronics
- EMC Testing for Lighting Products
- EMC Testing for Medical Devices
- EMC Testing for Military and Aerospace Equipment
- EMC Testing for Telecom Equipment (IT)
How hard can it be?
Turns out, very hard. Reliable information on this subject can be hard to come by, but a large study by Intertek Labs estimates EMC testing first time pass rate for regional markets is only 50%. Setbacks from failing tests can be devastating for your new products. With our equipment and expertise, you’ll be well fitted to tackle the challenges of EMC testing – and pass on the first time!
We have best solutions for EMC, EMI and RF testing needs, as well as large range of shielding materials and components !
Our affiliate for delivering EMI-EMC and RF testing solutions is EMC Partner. With our solutions, you can build yourself a EMC testing lab that meets any requirements. If you are unsure about the equipment you need to perform test that comply with all the necessary standards, our staff will be happy to assist you.
RF is short for radio frequency. RF is any frequency within the electromagnetic spectrum associated with radio wave propagation. When an RF current is supplied to an antenna, an electromagnetic field is created that then is able to propagate through space. Many wireless technologies are based on RF field propagation. These frequencies make up part of the electromagnetic radiation spectrum.
The RF part of the electromagnetic spectrum is generally defined as that part of the spectrum where electromagnetic waves have frequencies in the range of about 3 kilohertz (3 kHz) to 300 gigahertz (300 GHz).
Because of the multitude of RF applications in the world, it is imperative that products and systems be able to operate in their electromagnetic environment and must not introduce intolerable electromagnetic disturbances back into the environment. Therefore, before a product or system hits the marketplace, it must be tested for RF immunity and emissions. For RF immunity testing, the equipment is exposed to RF disturbances and fields with field strengths and frequency ranges representative of their in-operation environment. On the other hand, when a piece of equipment is tested for RF emissions, the equipment, under normal operation, is monitored for RF disturbances and fields.
We can help you set up a testing environment for the following category´s:
- Radiated Emissions Testing (EMI testing)
- Conducted Emissions Testing
- Flicker and Harmonics Testing
- Magnetic Field Immunity Testing
- EMC Immunity Testing
- RF Testing solutions
- Capacitor Testing
- Protection Testing
- Circuit Breaker Testing
- Electricity Meter Testing
- Protection Relay Testing
- Insulation Testing
- MIL Testing
- Avionic Testing
Our affiliate for different shielding materials and components is Soliani EMC. They have been on this market from the early 1980s. Fields of application for their products are mainly from military, medical, aeronautic, trains, robots and automatic systems, telecommunications for military and civil applications, navy and space.
- Shielding materials, components, filters, capacitors, paints, gaskets, windows etc.
- We also offer customized solutions, with extremely fast delivery!
EMI Filter Solutions
Our affiliate for standard and custom EMI/EMC/RFI Filters is Astrodyne TDI
Our EMI/EMC/ RFI Filter capabilities help your products meet all their requirements and achieve “Mission Success” in the ultimate application. We are a uniquely integrated company for advanced design, engineering, manufacturing, testing and technical support. We offer a complete selection of Power line filters. Standardized as well as customer-specific solutions – with full engineering support – help our customers meet international compliance standards and improve the immunity and safety of electrical and electronic equipment.
EMI/EMC solutions, ranging from small 1-phase components to powerful 2500A/690V industrial 3-phase filters. Most standard catalog items carry international approvals (UL, CSA, CE).
AC/DC power supplies, EMI Filters, AC/DC adapters, DC/DC Converters, Hi Reliability Power Converters, Linear Transformers, Medical Power Supplies, COTS Power Supplies, Ultra Low Leakage Power Supplies, Medical Isolation Transformers, Liquid Cooled, Air Cooled, or Environmentally sealed.
Radiated Emissions Testing
Out of all the EMC testing types, this is the most common one. You measure the strength of unwanted or unintended electromagnetic emissions to ensure they are within permitted tolerances.
You’ll want testing equipment that can rotate the tested object freely. This is because your unintended electromagnetic emissions do not radiate outwards in a uniform sphere. They spike outward only in certain angles. To find out all these emissions, the equipment has to have great maneuverability for the product and the surrounding antenna.
Related testing equipment you’ll want
- Spectrum analyzer – for measuring the emissions
- Measurement antennae specifically for your frequencies (ask our staff for more details)
Conducted Emissions Testing
Did you know your devices interfere with the power supply when you plug them in? When you vacuum your floor, the disturbance can be measured in nearby locations in the power grid. Conducted emissions testing makes sure your vacuum cleaner doesn’t affect your neighbors television.
EMC Immunity Testing
Most EMC tests measure what’s coming out of your device, but this time it’s backwards. Simply put, you introduce electromagnetic phenomena to your device and see what happens. These phenomena are split into two categories: continuous and transient. Continuous phenomena are continuous waves and the tests can last for hours. Transient phenomena are short bursts that could last as little as a few microseconds.
EMC immunity testing equipment you’ll want
- ESD Simulator – They generate electric discharges from the tip of the pistol-gun like device to “zap” your device. See picture below. Typical failures of this test include resetting of the device, digital logic errors, memory corruption or physical damage.
- EFT or burst generator – For simulating the effect of toggling a nearby electric switch when your device is in use.