Electromagnetic compatibility EMC (Electro Magnetic Compatibility), refers to the equipment or system in its electromagnetic environment in line with the requirements of the operation and does not produce intolerable electromagnetic interference to any equipment in its environment ability.
With the development of modern science and technology, the number and types of electrical and electronic equipment continue to increase, making the electromagnetic environment increasingly complex. In this complex electromagnetic environment, how to reduce mutual electromagnetic harassment, so that a variety of equipment normal operation, is an urgent problem; on the other hand, the poor electromagnetic environment will also have adverse effects on human and ecological.
Expanded Information:
EMC consists of two aspects of the requirements: on the one hand, it refers to the normal operation process of the equipment to the environment where it is located. Normal operation of the process of electromagnetic interference in the environment can not exceed a certain limit; on the other hand, the apparatus of the environment in the presence of electromagnetic interference with a certain degree of immunity, that is, electromagnetic sensitivity.
In recent years, with the high sensitivity of the electronic technology in the medical electrical equipment in a wide range of applications and new communication technologies, such as personal communication systems, cellular telephones, etc., in the rapid development of all areas of social life; medical electrical equipment not only emits electromagnetic energy itself, affecting radio broadcasting communication services and other equipment around the work, but also in the application of the environment in which it is also possible to be surrounded by such as communication equipment. The interference of electromagnetic energy emission causes harm to patients.
Filtered connectors on the product EMC performance is often a great help, but its cost is relatively high, usually in the use of on-board filtering, cable shielding, and other methods to solve the problem, the filtered connector is not used. Filtered connectors are usually used in some special circumstances, such as strict military standard requirements, harsh industrial environments, small batch applications and some special circumstances such as the use of (for example, the structure of the size limitations, etc.).
China's electromagnetic compatibility theory and technology research as a whole started late, and its development in the field of health care from the 1990s only began. 1995 China issued the "GB 9706.1-1995 General Requirements for Safety of Medical Electrical Equipment Standard", until April 5, 2005, the former State Food and Drug Administration issued a mandatory medical device industry standard "YY0505". Industry standard "YY0505-2005 medical electrical equipment Part 1-2: General requirements for safety - Concurrent standards: electromagnetic compatibility - Requirements and Tests".
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