Along with the technical development, more and more digital and high speed electronic and electric devices are widely applied to vary industries. Those equipments push the society developing, and the same time they bring the electromagnetic pollution problem to the society. Electromagnetic pollution, water pollution and air pollution are the three big pollution sources for modern life. Go with series electromagnetic problem, IEC6
As we know, the test object for EMC is electronic and electric device, among them, lighting is an important part which should do the EMC test naturally. Like FCC from
For EMI test, the International Special Committee on Radio Interference (CISPR) introduced CISPR-16 Radio Disturbance and Immunity Measuring Apparatus-Measuring Apparatus; for lighting industry, they introduced CISPR-15 Limits and Methods of Measurement of Radio Disturbance Characteristics of Electrical Lighting and Similar Equipments. Meanwhile, some countries push their own Lighting EMI test criterions according to their real situation, like EN55015-2007(quote CISPR-15) from EU counties, GB17743-1999 from
Table 1:
Radiated Electromagnetic Disturbance Limits |
|||
Frequency MHz |
Limits for Loop Diameter Db (µA) |
||
|
|
|
|
9KHz to 70KHz |
88 |
81 |
75 |
70KHz to 150KHz |
88 to 58** |
81 to 51** |
75 to 45** |
150KHz to 2.2 MHz |
58 to 26** |
51 to 22** |
45 to 16** |
2.2 MHz to 3.0MHz |
58 |
51 |
45 |
3.0MHz to 30MHz |
22 |
1.5 to 16*** |
9 to 12*** |
Base on CISPR16, Lisun Group developed two EMI test systems. According to the standards for traditional Lightings and new LED lightings, the frequency scanning range is different. The scanning frequency for KH3962 is 9 KHz to 300MHz, which is applied to LED and traditional lighting test; the scanning frequency for KH3961 is 9 KHz to 30MHz, which is applied to traditional lighting test. Both of them input three data to judge if the EUT can pass the test or not, that is PK, QP and AV. And user is freely to setup the standards (like GB17743, FCC, EN55015, GB4343) directly in the software.
Surely, besides the lighting industry, KH3962/KH3691 EMI test system is widely used in other electronic and electric industries, like Captial power system Ltd from India, Lumitec Ltd. from