National Standard of Electromagnetic Compatibility Technology
The development of modern information and communication technologies has dramatically improved people’s quality of life, but it has also caused a series of problems such as electromagnetic interference, transient electromagnetic emissions and radio frequency interference. To deal with these problems, it is essential to have a reliable system to measure the electromagnetic compatibility of a device. The National Standard of Electromagnetic Compatibility Technology (NSEMC) is designed to achieve this purpose.
The NSEMC consists of two major components: performance criteria and measurement methods. The former focuses on the technical requirements for the device’s operation, such as the electromagnetic emissions, the maximum voltage and current, etc. The latter evaluates the electromagnetic compatibility of the device by measuring its response to various electromagnetic phenomena.
The performance criteria of the NSEMC includes tests related to interference suppression, anti-interference, immunity and shielding. The main purpose of these tests is to make sure that the device will not create interference to the environment or be affected by other electromagnetic signals. Furthermore, these tests ensure that the device will be able to operate under various environment conditions, such as in extreme temperatures or in an electromagnetic-protected zone.
The measurement methods of the NSEMC evaluate all these performance criteria. For example, the conducted emission test measures the emission of the device through a connected network; the conducted immunity test evaluates the system’s response to various electrical impulses; and the radiated immunity test measures the system’s response to electromagnetic fields. Furthermore, other tests such as the susceptibility, transient phenomena and the shielding effectiveness tests are also performed.
The NSEMC also provides guidelines for the control of electromagnetic compatibility in the environment. This includes the development of policies for the management and control of electromagnetic interference, the establishment of special laboratories for the evaluation and testing of EMC equipment, and the formulation of guidelines for the improvement of the electromagnetic compatibility of products.
In conclusion, the National Standard of Electromagnetic Compatibility Technology has been developed to help ensure that electronic systems are safe and reliable in various operating environments. It includes performance criteria and measurement methods to evaluate the electromagnetic compatibility of the device, as well as guidelines for the development of policy and the control of electromagnetic compatibility in the environment. With the help of the NSEMC, manufacturers and users can ensure that their electronic systems are compliant with the current standards of electromagnetic compatibility.
