EMC is the abbreviation for electromagnetic compatibility, EMC=EMI+EMSEMI is electromagnetic interference, and EMS is electromagnetic immunity EMl=RE (radiation disturbance)+CE (conducted disturbance)+DP (disturbance power)+H& F (Harmonic Current and Voltage Fluctuation and Voltage Flicker) EMS=ESD (Electrostatic Discharge Immunity)+Radiated Immunity (RS)+EFT (Electrical Fast Transient Pulse Group Interference)+Surge Immunity)+CS (Conducted Immunity)+PFMF (Power Frequency Magnetic Field Immunity)+Dips (Voltage Drop and Short Time Interruption) These are some general testing items for EMC. For detailed project introductions, please refer to the EMC Testing Program Guide for electromagnetic compatibility.
For products, As long as there is a circuit in the product, EMC needs to be done. However, power cables that use power frequency AC or DC power are not within the scope of EMC. Signal transmission cables that require EMC only need cables that transmit differential signals, such as USB data cables, HDMI, DP, etc. Some analog signal transmission devices do not require EMC, such as audio cables, audio and video cables, etc
The EMC testing of electronic and electrical products can be roughly divided into:
1. Multimedia Equipment (MME), which is a combination of ITE and AV. For example: power adapter (for MME), PC and PC peripherals (USB cable, keyboard and mouse, headphones, etc.), mobile power supply, etc 2. Home appliances, such as mixers, bread machines, juice machines, etc 3. Electrical lighting and similar. For example, the driving power supply and controller of LED lamps, fluorescent lamps, and lighting fixtures
4. Industrial, scientific, and medical RF equipment
5. Electrical equipment for measurement, control, and laboratory use
6. Electronic and electrical equipment working in residential, commercial, and light industrial environments
7. Electronic and electrical equipment working in industrial environments
8. Electronic and electrical products
9. Uninterruptible power supply (UPS)
10. Fire alarm signal equipment, Components for fault signal equipment and personal rescue call equipment (some security products can also be divided into this, such as surveillance cameras)
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China