Electrostatic test
  • Electrostatic test

Electrostatic test


Corona discharge is a kind of discharge characterized by corona. When two electrodes in a gas have a shape that causes the electric field on their surface to be significantly larger than the electric field between the two electrodes. Corona discharge will cause electromagnetic interference, which will interfere with aircraft and aerial bombs, causing terminal or failure of communication system and causing accidents.

Electrostatic Discharge

Electrostatic Discharge Type

a. Corona discharge

Corona discharge is a kind of discharge characterized by corona. When two electrodes in a gas have a shape that causes the electric field on their surface to be significantly larger than the electric field between the two electrodes.

Corona discharge will cause electromagnetic interference, which will interfere with aircraft and aerial bombs, causing terminal or failure of communication system and causing accidents.

B. Spark discharge

When the electrostatic potential is relatively high charged conductor or human body close to other conductors or grounding conductor, it will cause electrostatic spark discharge.

When spark discharge occurs, static electricity is released instantly, and the ability to burn and detonate is strong. The discharge and electromagnetic pulse generated by electrostatic spark discharge have great destructive power, which can cause damage to some sensitive devices and equipment.

c. Brush discharge

Both occur on the surface of the insulator with acousto-optic multi-branch discharge. When the back side of the insulator is closely attached to the metal conductor, the front side of the insulator will have a propagating brush discharge. Multiple brush discharges or propagating brush discharges can occur on the same insulator. Brush discharge has a certain ignition risk; propagation type brush discharge ignition risk.

d. Surface discharge

Picture Name

ESD Electrostatic Discharge Detection Basis Standard

Electrostatic test

Surface discharge is a lightning-like discharge formed by large-scale, high-density charged particles suspended in space. Its ignition risk is very large.

ESD Electrostatic Discharge Detection Basis Standard

IEC 61000-4-2/GB T17626.2: Electrostatic discharge immunity test

The electrostatic discharge immunity test mainly checks the discharge caused by people or objects in contact with the equipment (direct discharge), and the impact on the operation of the equipment caused by the discharge of people or objects near the equipment (indirect discharge). Electrostatic discharge can generate a discharge current of 1-50A in a time of 0.5-20ns. Although the current is large, the energy is small because the duration is short. Therefore, the general electrostatic discharge does not cause harm to people, but it may cause destructive harm to electronic products such as integrated circuit chips.

The test level of the electrostatic discharge test is

Contact discharge: 2kV,4kV,6kV,8kV; Air discharge: 2kV,4kV,8kV,15kV.

detection technology

Tianhai detection electrostatic discharge test system adopts Swiss brand TESEQ, model NSG 437, air and contact discharge voltage up to 30kV, equipped with various specifications of discharge module, has the characteristics of fast voltage rise time, long voltage holding time, high precision and so on.

Tianhai Testing Laboratory


Tianhai testing is set up and operated in accordance with the laboratory accreditation system specification ISO 17025. The testing instruments are made up of Germany's Rohde & Schwarz, Switzerland's EMTEST, YYOKOGAWA, Agilent, Tektronix and other world's top instrument manufacturers. The equipment is advanced and sophisticated, the site environment control is reliable, traceability is strong, the technical team is senior and efficient, and close cooperation with international authoritative organizations is maintained.

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Inspection Guarantee

China National Accreditation Committee for Conformity Assessment Laboratory Accreditation (CNAS), Inspection and Testing Agency Qualification Certificate (CMA), American Laboratory Accreditation Association (A2LA); Government-approved third-party testing service agencies, in strict accordance with national standards for testing, issued a report with legal effect.

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Quickly get the certificate.

55 engineers with more than 10 years of experience in EMC design and rectification, quickly out of the design; The introduction of German RS,SCHWARZBECK and Swiss TESEQ imported precision instrument testing, 24-hour operation, short test cycle, half an hour out of the program, 3 days to get the report.

Testing Laboratory

Testing Laboratory

Has EMC electromagnetic compatibility, safety laboratory, 966 anechoic chamber, automotive electronics laboratory, medical electronics testing laboratory, 5G RF CCC laboratory, RF laboratory, private anechoic chamber laboratory, providing a wide range of testing; The laboratory has won CMA, CNAS, A2LA and other qualifications;

Enterprise strength

Enterprise strength

15 years of industry experience, deep-rooted in the field of electromagnetic compatibility, efficient solution to product electromagnetic compatibility and other issues; National high-tech enterprise, with CMA and CNAS certificates, has been recognized by UL, TUV, Intertek, TIMCO, FCC, EMCC, NEMKO, SGS, etc. in the United States, serving the world.

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