Description
Service background
EMC test is also called electromagnetic compatibility (EMC), refers to the electronic products in the electromagnetic field interference size (EMI) and anti-interference ability (EMS) comprehensive assessment, is one of the most important indicators of product quality, electromagnetic compatibility measurement by the test site and test instruments.
The purpose of EMC testing is to detect the impact of electromagnetic radiation generated by electrical products on the human body, the power grid in public places and other electrical products in normal operation.
Magnetic compatibility is a subject that studies that under the condition of limited space, time and spectrum resources, various electrical devices (including organisms in a broad sense) can coexist without causing degradation. It includes two parts: electromagnetic interference and electromagnetic sensitivity. Electromagnetic interference test is to measure the size of the electromagnetic wave signal generated and emitted by the device under normal working condition to reflect the strength of the interference to the surrounding electronic equipment. Electromagnetic sensitivity test is to measure the ability of the equipment under test to resist electromagnetic disturbance.
About:
Electromagnetic Compatibility Directive (EMC).
The EMC Directive is numbered 2014/30/EU and will come into force on 18 April 2014. The old EMC Directive 2004/108/EC will be repealed on April 20, 2016.
Electromagnetic interference
Electromagnetic interference mainly includes radiation emission and conducted emission.
Radiation emission:
Electromagnetic interference propagating through space in the form of electromagnetic waves.
Conducted emission:
Electromagnetic interference that travels along a conductor.
Test venue:
Open field, half anechoic room, shielding room.
Electromagnetic interference test main equipment:
1. Anechoic room
2. Receiver
3. Receiving antenna
4, artificial power network
5, power absorption pliers
6, turntable, lifting table
7, rotary table, lifting table controller
Electromagnetic compatibility test items:
conduction conduction emission (9kHz-30MHz)
power clamp (30MHz-300MHz)
magnetic emission (9kHz-30MHz)
radiated emission of space radiation (30MHz-18GHz)
Intermittent conduction interference click
harmonics class a,b,c,d
Voltage flicker Flicker plt.pst
Electrostatic ESD (±0.1-±16.5kV)
Radiation immunity (below 1GHz)
Fast pulse group EFT/B (±0.1-±4.4kV)
surge surge (0.1-6.6kV)
Conductive immunity CS (0.1-30V)
Anti-magnetic field interference MS (0-120A/m)
Power off Dips (0%-100%)
Oscillatory Waves Surge 0.1-6.6kV waveform 100kHz
Harmonic and interharmonic immunity
Magnetic field EFM 10Hz-400kHz (EN50366)
Composition:
EMC includes two main items: EMI (interference) and EMS(sensitivity, anti-interference)
EMI test items include:
RE (radiation, emission)
CE(Conducted Interference)
Harmonic
It was Flicker.
EMS test items include:
ESD (Static electricity)
EFT (Transient Pulse Interference)
DIP(Voltage drop)
CS (Conducted Anti-interference)
RS (Radiation Immunity)
There was a Surge of lightning.
PMS (Power Frequency Magnetic Field Immunity)
Categories:
1.EMI (Electro-Magnetic Interference) : electromagnetic interference test
EMI test main contents:
Radiated Emission – Radiation disturbance test
Conducted Emission- Conducted harassment test
Harmonic- Harmonic current disturbance test
Flicker- Voltage variation and flicker test
2. EMS (Electro-Magnetic Susceptibility) — electromagnetic susceptibility test
The purpose of this test is to test whether the electrical products can work stably in the electromagnetic environment without being affected.
Main contents of EMS test:
ESD- static immunity test
RS- Radiofrequency electromagnetic field radiation immunity test
CS- Conducted disturbance immunity test for RF field induction
DIP- Immunity testing for voltage dips, short interruptions and voltage changes
SURGE- Surge immunity test
EFT- Electrical fast transient pulse group immunity test
PFMF- Power frequency magnetic field immunity test
Stray definition: Radiation at discrete frequencies other than carrier frequencies and sideband and adjacent channels due to normal modulation and switching transients when a standard test signal is modulated (i.e. far end radiation). Stray radiation can be divided into two types according to its source: conduction type and radiation type.
Conducted stray: refers to the level power of any discrete signal measured at the 50 ohm load at the antenna junction.
Radiation stray: Stray disturbance caused by the housing, structure and interconnect cables of the test equipment. The test conditions are preferred to be carried out in the anechoic room or outdoors.
Electromagnetic compatibility EMC directive requirements:
Industrial product related standards and test types
– EN 55011: Limits and methods of measurement of radio interference characteristics of industrial electrical device
– EN 50081-2: Electromagnetic compatibility-Generic emissions standard Part 2: Industrial environment
– EN 50082-2: Electromagnetic compatibility-Generic immunity standard Part 2: Industrial environment
EMI/ electromagnetic interference testing
CE(Conducted Emission)/ Conducted Radiation testing: EN 55011
-RE(Radiated Emission)/ Radiation testing: EN 55011
EMS/ Electromagnetic tolerance test
-CS(Conducted Susceptibility)/ Conducted Immunity Test: EN 61000-4-6
-RS(Radiated Susceptibility)/ Radiation Immunity testing: EN 61000-4-3
– Electrostatic discharge (ESD)/ Electrostatic Immunity test: EN 61000-4-2
-EFT/Burst(Electrical fast transient)/ Fast transient pulse immunity test: EN 61000-4-4
PFMF(Power frequency magnetic field)/ Power frequency Magnetic Field Immunity test: EN 61000-4-8
-Surge/ Lightning surge Immunity test: EN 61000-4-5
-PQF(Voltage dips, interruption and variation)/ Voltage transient immunity test: EN61000-4-11
Other product related standards
-EN 55013: Applicable to broadcast receivers and ancillary equipment
-EN 55014: Applicable to household appliances and portable tools
-EN 55015: Applicable to lamps and lanterns
Service advantage
Timeliness: RTS has a set of independently developed LIMS system, which monitors and manages the entire test process, greatly improving work efficiency and shortening the inspection cycle entrusted by enterprises.
Convenient: RTS has a perfect order platform and free on-site pick-up service, and can provide one-to-one consultation and training and one-stop product compliance service chain for enterprises.
Price: RTS in the consulting stage can be based on the product information and material situation of the enterprise comprehensive evaluation, to provide the most appropriate and the most economical quotation scheme for the enterprise, greatly reducing the test cost.
Quality: As a national high-tech enterprise, RTS has dozens of patented inventions and supporting instruments and equipment and professionals to meet the needs of different customers and different products.
