Does anyone know about EMC testing and what is EMC testing?

Since it is a whole machine test, why use electrostatic paper to wrap the letter circuit board?

Generally, do not touch the PCB board directly with your hands (you can use anti-static gloves to plug and unplug the circuit board), and do not use a plastic bag to store it (you can choose a bag specially used for anti-static, which is sold)...The main reason is that the IC of the PCB board is damaged by static electricity.

What type of products does your company produce: home appliances? Information technology? Tone ** products? Automotive electronics ?..If you have a need, you can find me, our company is an electronic testing laboratory in Shenzhen (German-funded).

Different types of products use different standards (different standards, different testing requirements), if you want to know, you can q me, I have been in this industry for 6 years, I believe I can help you!

Mine, EMC engineer.

EMC laboratory of Suzhou Electrical Apparatus Research Institute (National Electrical Appliance Product Quality Supervision and Inspection Center).

You can come here to do EMC testing, **discount!

051268410132-824 Mr. Li.

Are you asking what to pay attention to during the test?

What tests do you have to do, among them, conducted emissions, radiated emissions are the most difficult to pass, to choose a good filter.

Corrective measures are nothing more than grounding, shielding, filtering, and wiring.

First of all, you must confirm what type of product your product belongs to, what standards are applicable, what specific testing requirements are there, and specific questions can be directly asked to me. (Shenzhen), Xie Sheng.

Basically, it is not advisable to wrap the circuit board with electrostatic paper, because your assembly will not be easy to operate in the future, and there is the cost, which is a method used when looking for interference sources, not specific rectification measures.

Specifically, depending on what experiments your product needs to do, if your product is DC, then you only need to do some simple tests, then don't think about it so much, but some products need to do more tests, and the requirements are stricter, and there are more rectification methods required, such as grounding, filtering, shielding, etc.

Electromagnetic environment

The sum of all electromagnetic phenomena present at a given site.

Electromagnetic disturbance

Any electromagnetic phenomenon that may cause degradation of the performance of the device, equipment or system, or damage to living and inanimate matter.

Electromagnetic Interference (EMI).

Deterioration in the performance of equipment, transmission channels, or systems caused by electromagnetic disturbances.

Radiated Emissions (RE) and Conducted Emissions (CE).

re: Useful or undesirable electromagnetic energy that travels through space. CE: Electromagnetic emission transmitted along a power supply or signal line.

Electromagnetic susceptibility (EMS).

The undesirable level of response of a device when exposed to an electromagnetic environment. Radiated susceptibility Cs and conduction susceptibility Cs.

A physical quantity or physical phenomenon in which transients change between two adjacent states in a less time than the time scale of interest.

How does EMC testing work? How does EMC testing work? What is EMC?

EMC emission is associated with the reduction of unintentionally produced DU electromagnetic energy. EMC susceptibility or immunity involves the normal operation of electronic, electrical, and internal gas equipment that is subject to electromagnetic interference.

There are a variety of different terms to know in the EMC space:

EMC Radiation Test A type of testing for electromagnetic interference (EMI) caused by electrical equipment

EMC Immunity Test A test used to test the susceptibility of a product to electromagnetic interference from other ** conditions.

Electrostatic current (ESD) Static electricity released when two objects come into contact. ESD includes static electricity that you sometimes feel after drying your clothes in a dryer or a lightening bolt.

Conductive immunity testing In a test, an electric current is injected into the input and output lines of a system.

Conducted radiation testing is the radio frequency energy from an electrical device that passes through a wire back to an electrical system.

Intentional Radiator A product that intentionally generates and emits energy at radio frequencies, such as a radio device like a mobile **.

Unintentional radiator - A device, such as a personal computer or television, that does not intentionally emit radio frequency energy, but produces radio frequencies that are self-generated or send radio signals to the device via a connecting wire.

Radio frequency A frequency of electromagnetic energy emitted for communication.

Radio Frequency Compatibility The ability of a radio frequency receiver or transmitter subsystem operating in a system connected with an antenna to operate without degradation due to antenna-to-antenna connection.

EMC test, also known as electromagnetic compatibility (EMC), the full name is Electro Magnetic Compatibility, which refers to the comprehensive evaluation of the interference size (EMI) and anti-interference ability (EMS) of electronic products in the electromagnetic field, which is one of the important indicators of product quality.

1) Electrostatic discharge immunity (ESD).

The test is based on IEC 61000-4-2 criteria B, which verifies the ability of individual devices or systems to resist static venting interference.

Test principle: ESD experiment is to simulate the electrostatic discharge generated by the human body and objects when they contact the equipment or the discharge of the human body and objects to adjacent objects, including the direct exchange of energy, causing the damage of the device or the near field (change of electric field and magnetic field) caused by the discharge, resulting in the malfunction of the equipment.

2) Radiated electromagnetic field (80MHz 1000 MHz) Immunity (RS).

The test is based on IEC 61000-4-3 Criteria A, which is designed to verify the immunity of individual devices or systems to electric field interference.

EMC Testing Purpose:

Detect the impact of electromagnetic radiation generated by electrical products on the human body, public power grid and other electrical products in normal operation. It is defined as "the ability of equipment and systems to function properly in their electromagnetic environment without causing unbearable electromagnetic disturbance to anything in the environment", which has two meanings.

First of all, the equipment should be able to work normally in a certain electromagnetic environment, that is, the equipment should have a certain electromagnetic immunity (EMS); Secondly, the electromagnetic disturbance generated by the device itself must not have an excessive impact on other electronic products, i.e., electromagnetic disturbance (EMI).

EMC test, also known as electromagnetic compatibility (EMC), the full name is Electro Magnetic Compatibility, which refers to the comprehensive evaluation of the interference size (EMI) and anti-interference ability (EMS) of electronic products in the electromagnetic field, which is one of the important indicators of product quality.

Brief introduction. emc=emi+ems

EM (Electro-Magnetic Interference) - Electromagnetic Disturbance Test.

1. Radiated Disturbance Test (RE).

2. Conductive harassment test (CE).

3. Power disturbance test (clamp).

4. Harmonic current test - test standard: EN 61000-3-2

5 Voltage Change and Flicker Test (Flicker) - Test Standard: EN 61000-3-3

EMS (Electro-Magnetic Susceptibility) - Electromagnetic immunity test.

1.Electrostatic Discharge Immunity Test (ESD) - Test Standard: IEC EN61000-4-2

2.RF Electromagnetic Field Radiated Immunity (RS) - Test Standard: IEC EN 61000-4-3

3.Conducted Disturbance Immunity (CS) for RF Field Induction - Test Standard: IEC EN 61000-4-6

4 Electrical Fast Transient Burst Immunity Test (EFT) - Test Standard: IEC EN 61000-4-4

5. Surge (Shock) Immunity (Surge) - Test standard: IEC EN 61000-4-5

6. Voltage sag, short-term interruption and voltage change immunity test (DIPS) - test standard: IEC EN 61000-4-11

7 Power Frequency Magnetic Field Immunity Test (PFMF) - Test Standard: IEC EN 61000-4-8

The above is the sorting of Unai Testing, I hope it will be helpful to you, if you have any other questions, you can consult Unai Testing.

The EMC test items include electromagnetic emission (EMI) and electromagnetic immunity (EMS).

1. EMI's inspection items:

1. Conduction (CE) (150kHz 30MHz);

2. Intermittent interference voltage (click) (150kHz, 500kHz, and 30MHz);

3. Interference power (30MHz 300MHz);

4. Harmonic current (2 40th harmonic);

5. Flicker to make a sedan flicker.

Second, the inspection items of EMS:

1. Electrostatic discharge immunity;

2. Immunity to radiated electromagnetic field (80MHz 1000MHz);

3. Electrical fast transient pulse group immunity;

4. Surge (lightning strike) immunity;

5. Injection current (150kHz 230MHz) immunity;

6. Immunity to voltage sag and short-term interruption.

*What is EMC testing? **EMC testing (Electromagnetic Compatibility Test), also known as electromagnetic compatibility testing, refers to a series of tests performed on an electronic device or system to determine its performance and impact in an electromagnetic environment. This test can assess whether a device generates electromagnetic interference (EMI) or is resistant to interference from external electromagnetic fields (EMS).

Notice**Purpose of EMC Testing**The main purpose of EMC testing is to ensure electromagnetic compatibility between electronic equipment and other equipment and the environment, and to avoid communication interruptions, data distortion and other problems caused by electromagnetic interference. EMC-compliant equipment can work more reliably while also helping to ensure the safety of the equipment. Types of EMC Testing: There are several types of EMC testing:

1.Radiation testing: Evaluates whether a device produces electromagnetic radiation and determines its radiation intensity level.

2.Conduction testing: Evaluates whether a device will send electromagnetic interference to other devices or the environment through conductive means such as cables or connectors.

3.Electrostatic Discharge Testing: Evaluates whether a device is resistant to interference caused by electrostatic discharge.

4.Mobility Testing: Assesses whether a device is susceptible to mobility interference (e.g., handheld devices) during normal use.

5.Sensitivity test: Evaluates whether the device is able to resist electromagnetic noise interference from the outer front Li boundary.

EMC test items include EMI (Electromagnetic Interference) test and EMS (Electromagnetic Immunity) test.

Electromagnetic interference, or EMI, refers to any electromagnetic phenomenon that occurs during conduction or electromagnetic fields accompanied by voltage and current that will reduce the performance of a device, equipment or system, or may have adverse effects on living organisms or substances. Electromagnetic interference is also a major problem for frequency converter drive systems.

Electromagnetic anti-interference, or EMS, refers to the ability of machinery and equipment and systems in a certain environment to have a certain degree of immunity to electromagnetic interference in the environment, that is, electromagnetic sensitivity. EMS also includes electrostatic immunity ESD, RF immunity RS, electrical fast transient burst immunity EFT, surge immunity, voltage sag immunity voltagedipandinterrupt, and so on.

Introduction:

The full name of EMC test (electromagnetic compatibility test) is electromagnetic compatibility, which is defined as "the ability of equipment and systems to function properly in their electromagnetic environment without posing unbearable electromagnetic disturbance to anything in the environment".

EMC contains two aspects: on the one hand, the equipment should be able to work normally in a certain electromagnetic environment, that is, the equipment should have a certain electromagnetic immunity (EMS); Secondly, the electromagnetic disturbance generated by the device itself must not have an excessive impact on other electronic products, i.e., electromagnetic disturbance (EMI).

For the above content, please refer to: Encyclopedia-EMC Testing.