1. The purpose of the experiment The electrostatic discharge test is to simulate the discharge of static electricity carried by the human body when it touches the surface or surrounding metal objects of electronic and electrical equipment. Since this discharge will cause malfunctions of the working electronic and electrical equipment through electromagnetic changes in the near field or act through the energy absorption of the electrostatic discharge of the device or cause equipment damage through the energy absorption of the electrostatic discharge of the device, the State formulates the corresponding To test its reliability.
2. Experimental standard and configuration
1. The national standard adopted in the test: GB / T17626.2-1998 electromagnetic compatibility test and measurement technology, electrostatic discharge immunity test, which is equivalent to the international standard: IEC61000-4-2: 1995.
2. The discharge method of the test is divided into contact discharge and air gap discharge. The severity of the test given by the standard is divided into:
Class Contact discharge Air gap discharge
Level 1 2KV 2KV
Level 2 4KV 4KV
Level 3 6KV 8KV
Level 4 8KV 15KV
Class X Special Special
3. The test method is divided into direct discharge and indirect discharge
4. The test configuration takes a desktop device as an example)
The reference ground plate of the ESD simulation generator (the material is a copper or aluminum plate of 0.25mm or more. When other metal materials are used, the thickness is at least 0.65mm. The length and width of the reference ground plate are not limited, but the four sides are required to exceed the horizontal coupling plate of the test desktop. Or the ground equipment is more than 0.5m on each side and is connected to the laboratory protection ground)
Wooden test bench (1700 * 900 * 800mm)
Horizontal coupling plate
470K ohm resistance wire (2 pieces)
Insulation pad (thickness 0.5mm)
Vertical coupling plate
5. Experimental environment temperature: 15 ℃ -35 ℃
Humidity: 30% -65%
Air pressure: 68kpa-106kpa
3. Electrostatic Discharge (ESD) refers to the charge transfer phenomenon caused by objects with different electrostatic potentials being close to or in direct contact with each other. It occurs between the operator and nearby objects. The ESD simulator can simulate the naturally generated static electricity and is used to evaluate the performance of electronic and electrical equipment when they suffer ESD. Simulation verification is performed in areas that are easily accessible to the operator, such as the device's input, output connectors, chassis (ungrounded), keyboard, switches, buttons, or indicator lights. The ESD simulator consists of a high-voltage generator and a discharge head, as shown in Figure 15.
When working, first charge the high-voltage capacitor, then close the discharge switch to discharge directly or indirectly to the subject. There are two methods of direct discharge: contact discharge and air discharge. The former is applied to the points and surfaces that the operator may contact when normally using the EUT: air discharge is used where contact discharge cannot be used, such as the surface of the equipment with insulating paint. Indirect discharge is a simulation of the discharge of an object placed or installed near the EUT, and is achieved by contact discharge of the coupling plate through an electrostatic discharge simulator.
2. Experimental standard and configuration
1. The national standard adopted in the test: GB / T17626.2-1998 electromagnetic compatibility test and measurement technology, electrostatic discharge immunity test, which is equivalent to the international standard: IEC61000-4-2: 1995.
2. The discharge method of the test is divided into contact discharge and air gap discharge. The severity of the test given by the standard is divided into:
Class Contact discharge Air gap discharge
Level 1 2KV 2KV
Level 2 4KV 4KV
Level 3 6KV 8KV
Level 4 8KV 15KV
Class X Special Special
3. The test method is divided into direct discharge and indirect discharge
4. The test configuration takes a desktop device as an example)
The reference ground plate of the ESD simulation generator (the material is a copper or aluminum plate of 0.25mm or more. When other metal materials are used, the thickness is at least 0.65mm. The length and width of the reference ground plate are not limited, but the four sides are required to exceed the horizontal coupling plate of the test desktop. Or the ground equipment is more than 0.5m on each side and is connected to the laboratory protection ground)
Wooden test bench (1700 * 900 * 800mm)
Horizontal coupling plate
470K ohm resistance wire (2 pieces)
Insulation pad (thickness 0.5mm)
Vertical coupling plate
5. Experimental environment temperature: 15 ℃ -35 ℃
Humidity: 30% -65%
Air pressure: 68kpa-106kpa
3. Electrostatic Discharge (ESD) refers to the charge transfer phenomenon caused by objects with different electrostatic potentials being close to or in direct contact with each other. It occurs between the operator and nearby objects. The ESD simulator can simulate the naturally generated static electricity and is used to evaluate the performance of electronic and electrical equipment when they suffer ESD. Simulation verification is performed in areas that are easily accessible to the operator, such as the device's input, output connectors, chassis (ungrounded), keyboard, switches, buttons, or indicator lights. The ESD simulator consists of a high-voltage generator and a discharge head, as shown in Figure 15.
When working, first charge the high-voltage capacitor, then close the discharge switch to discharge directly or indirectly to the subject. There are two methods of direct discharge: contact discharge and air discharge. The former is applied to the points and surfaces that the operator may contact when normally using the EUT: air discharge is used where contact discharge cannot be used, such as the surface of the equipment with insulating paint. Indirect discharge is a simulation of the discharge of an object placed or installed near the EUT, and is achieved by contact discharge of the coupling plate through an electrostatic discharge simulator.
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