EMC laboratory: Electromagnetic compatibility
Treo can produce almost every electromagnetic phenomenon in its state-of-the-art EMC laboratory and determine all emissions of a device.
The corresponding EMC tests are offered from various basic, specialised basic and product standards as well as guidelines from all industries. These include, for example, tests in accordance with CISPR 55032 Interference emission for multimedia devices or ABD0100 Airbus regulations.
Unwanted electromagnetic interactions between a device and its environment can lead to adverse effects or even damage to the device, its surroundings, and people. Accordingly, the safe operation of an electrical device in its environment must be ensured. In the field of EMC, a distinction is made between two cases: on the one hand, the influence of a device on its environment is determined (emission) and on the other hand, the influence of an environment on a device is simulated (susceptibility).
In the sector of electromagnetic compatibility, we have precise equipment as well as the expertise and knowledge gained from many years of daily testing. By moving to our state-of-the-art laboratory in Neumünster we have been able to unite experience and innovation. Contact us to find out more about our extensive range of tests and to benefit from our experience.
Electromagnetic phenomena occur in every power grid and in every interaction between electrical devices. They are partly caused by electrical components and can affect other devices in their environment. Manufacturers must therefore ensure that the interference emitted by their device does not exceed certain limits. At the same time, the device must be able to withstand influences from its electrical and physical surroundings.
International specialist committees draw up basic standards to describe these electromagnetic phenomena, such as conducted emissions. Other international committees deal with specific environments, products, and product families. They draw up the appropriate basic standards, product standards, and product family standards in order to achieve the required minimum protection targets in this environment or for a product group.
Below you will find a selection of our test methods, together with the standards in which they are described.
Conducted Emission
When measuring conducted emissions, the interference energy emitted by your device via the connected cables to its environment is determined. This includes both power supply lines and signal lines between different devices. If the interference energy exceeds certain limit values, this can have a negative impact on other components in its electrical surroundings. Compliance with these limits is one requirement for the approval of an electrical device.
Conducted Susceptibility
Conducted susceptibility describes the phenomenon of coupling an interference signal to an existing signal. Crosstalk is an example of this test area. Here, a signal from one line is coupled into a parallel line - as is the case when tapping telephone lines. The reaction of the supply or signalling line to the interference must be documented and evaluated for the manufacturer to be able to guarantee safe operation.
Radiated Emission
With ever higher frequencies in modern electronics, conductor paths and internal connecting cables are more commonly becoming potential antennas for the radiation of high-frequency energy. To measure this radiated emission, we survey the device in operation in a semi-anechoic chamber (SAC) or in an open field from a defined distance from all sides. The emissions must not exceed certain limit values.
Radiated Susceptibility
At sufficiently high frequencies, the conductor tracks and internal connecting cables of your device become a receiving antenna for interference energy. The device under test is confronted with a defined field strength of these interference energies. Its reaction is to be documented and evaluated. Radiated susceptibility tests are therefore used to determine the devices resistance to electric fields in its environment.
Compass Safe Distance
Devices in the bridge area of ships or in the cockpit of aeroplanes must prove that they do not cause unacceptable interference to emergency navigation systems. For this purpose, the influence of the device on the earth's magnetic field in its environment is determined. The compass protection distance represents the permissible physical distance between the device and the compass. The less it influences the earth's magnetic field in its surroundings, the closer the EUT can be positioned to the compass.
ESD
Electrostatic discharges can occur wherever a charged body comes close to a surface. The phenomenon is most tangible when it is your own body that first charges up and then discharges again within nanoseconds. Modern semiconductor transistors can be severely damaged by such electrostatic discharges. In ESD testing, this phenomenon is simulated and applied to all touchable points of a device.
EMF
Electromagnetic fields can be dangerous for people. They occur wherever high voltages are present or high currents flow. In the work environment, for example, the employer is obliged to ensure that certain limit values are adhered to at the place of work in order to guarantee the safety of employees. We measure and inspect workplaces to avoid risks and protect people.
In our high-tech test laboratory, we can cover EMC requirements from the defence sector in addition to the requirements for civil and public applications. These include all relevant tests according to every version of the American guideline MIL-STD-461.
With our modern measuring equipment and qualified experts in EMC services, we offer you all tests for aviation, shipbuilding, rail, defence, and industrial approvals from one single source. Contact us to find out more about our versatile testing programme.
Focus on quality
"In our laboratories we have a lot of experience and know-how to ensure the satisfaction of our clients."
Carsten Möller, B.Sc.
Head of EMC Laboratory
Phone: +49 (0)152 28 82 08 00
E-mail: carsten.moeller@treo.de