Electromagnetic compatibility test
Electromagnetic compatibility（EMC，or Electromagnetic Compatibility）refers to the ability of a device or system to operate as required in its electromagnetic environment without causing intolerable electromagnetic disturbance to any device in its environment.
Electromagnetic compatibility is designed for various products such as electronics, motors, and communications. In addition to the user's requirements for electromagnetic compatibility, countries around the world have also formulated relevant standards and specifications.
R&M Certification Testing builds a complete electromagnetic compatibility laboratory according to the standard requirements, and has a large number of excellent test engineers to provide customers with professional technical services.
Electrostatic discharge immunity (ESD) test
During the operation of electronic equipment, electrostatic discharge harassment is often encountered. When electrostatic discharge occurs, the short and strong discharge current and the electromagnetic field generated by the current may cause fault or damage to the circuit of electronic and electrical equipment.
Electrostatic discharge test is to evaluate the performance of electronic and electrical equipment when subjected to electrostatic discharge. Also included are electrostatic discharges that may occur between the human body and objects near critical equipment.
Applicable standards：GB/T 17626.2 / IEC 61000-4-2 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measuring techniques Electrostatic discharge immunity test
Test range：
Discharge voltage: 0kV～20kV
Electrical fast transient pulse group immunity (EFT) test
When the inductive load (such as relay, contactors, etc.) is disconnected, due to the insulation breakdown or contact bounce of the switch contact gap, a kind of small energy but wide spectrum transient interference will be generated at the disconnect point, which will bring great threat to the reliable work of electronic and electrical products.
Electrical fast transient pulse group test is to test the ability of electronic and electrical equipment to withstand such transient disturbance.
Applicable standards：GB/T 17626.4 / IEC 61000-4-4 Electromagnetic compatibility (EMC) - Part 4-4: Test and measurement techniques - Electrical fast transient pulse group immunity test
Test range：
Pulse voltage: 0kV～4.5kV
Pulse frequency: 0.1～300kHz
Surge (Shock) Immunity (SURGE) Test
High voltage switching operation or lightning strike may produce transient overvoltage or overcurrent in the power grid or communication line, which is a kind of electromagnetic disturbance with large energy. This disturbance may cause fault or damage to the circuit of electronic and electrical equipment.
Surge immunity test is to test the ability of electronic and electrical products to withstand such electromagnetic disturbance.
Applicable standards：GB/T 17626.5 / IEC 61000-4-5 Electromagnetic compatibility (EMC) - Part 4-5: Testing and measuring techniques - Surge (impact) immunity test
Test range：
Pulse voltage: 0.5kV～6kV
Voltage sag, short interruption and voltage variation immunity (DIP) tests
Voltage sag, short outage is caused by the failure of the power grid, power facility or the sudden and large change of load.
The standard provides for different types of experiments to model the effects of abrupt voltage changes in order to establish a general criterion for evaluating the immunity of electrical and electronic equipment to such changes.
Applicable standards：GB/T 17626.11 / IEC 61000-4-11 Electromagnetic compatibility testing and measuring techniques - Voltage sag, short interruption and voltage variation immunity tests
Test range：
Voltage sag range: 0％～120％ Input reference voltage UT（AC220V）
Sag phase control: 0～359°
Voltage sag duration: 0.5 ~ 5000 cycles
Power frequency magnetic field immunity test（PMS）
The power frequency magnetic field is generated by the power frequency current in the conductor, or to a very small extent by other nearby devices (such as the flux leakage of a transformer), that is, where the current flows, there will be a magnetic field.
Power frequency magnetic field is characterized by low frequency, long wavelength, and its test waveform is power frequency sine wave, which can cause different degrees of influence on various electrical and electronic equipment.
Applicable standards：GB/T 17626.8-2006 Electromagnetic compatibility Test and measurement techniques Power frequency magnetic field immunity test
Test range：
Magnetic field strength: 1-100A/m (Can be continuously tested)
100-400A/m (1-10s)
The current waveform：50/60Hz sine wave Current distortion rate: ＜5%
Waveform interval time：1-9999s
Duration of test：1-28800s
Output magnetic field strength：Schedulable setting
Case size：19 inch 4U 1 unit /19 inch 6U 1 unit
Execution standard：IEC61000-4-8 GB/T17626.8
Conducted disturbance immunity (CS) test of radio frequency field induction
The source of disturbance involved in this experiment usually refers to the electromagnetic field from the radio frequency transmitter. The electromagnetic field may be applied to the entire cable connected to the installation device.
To establish a common reference for evaluating the immunity performance of electrical and electronic appliances when they are disturbed by conduction induced by RF fields.
Applicable standards：GB/T 17626.6 / IEC 61000-4-6Electromagnetic compatibility Test and measurement techniques Conducted disturbance immunity of RF field induction
Test range：
Test frequency: 100kHz～400MHz
In upgrading test
Conduction emission test（CE）
Radiation emission test（RE）
Radiation immunity test（RS）
......