Date：2021-11-02 17:11:10

Eye diagram test is a test used to test the quality of signal. The eye diagram of digital signal contains rich information, which can reflect the overall characteristics of digital signal and evaluate the quality of digital signal. Therefore, the analysis of eye diagram is one of the keys of signal integrity analysis of digital system. View >>

Date：2021-11-02 16:19:32

For the nominal noise in electronic circuits, it can be generally considered that it is a general term for all signals except the destination signal. At first, people called the electronic signals that caused the noise emitted by audio equipment such as radios noise. However, the consequences of some non purposeful electronic signals on electronic circuits are not all related to sound. Therefore, people gradually expanded the concept of noise. For example, those electronic signals that cause day shift stripes on the video screen are also called noise. It may be said that all signals in the circuit other than the target signal, whether it affects the circuit or not, can be called noise. View >>

Date：2021-11-02 15:15:48

Temperature rise test is a routine test item in the type test of electrical products. The purpose of temperature rise test is to test the temperature change of electrical products and components, so as to determine whether the electrical products or components meet the requirements of the standard. With the rapid development of electrical equipment, temperature rise test is becoming more and more important for the safety of electrical equipment and components. View >>

Date：2021-11-02 14:39:25

Electrical performance is usually defined in the rated voltage, current, active power, reactive power, resistance, capacitance, inductance, conductivity and other performance indicators of electrical components. Semiconductors cover a wider range, such as DC amplification, AC amplification, rectifier current, reverse breakdown voltage, forward conduction voltage, junction capacitance, noise figure, characteristic frequency, cut-off frequency, dissipated power, etc. The electrical performance test includes the basic parameter test of conductor or insulation quality, such as conductor resistance, insulation resistance, correct value of dielectric loss angle, capacitance, etc. The higher the working voltage of the cable, the stricter the requirements for its electrical performance. View >>

Date：2021-11-01 18:26:32

Voltage withstand test is one of the main methods to test the overvoltage withstand capacity of electrical appliances, electrical equipment, electrical devices, electrical circuits and electrical safety appliances. The withstand voltage test is to detect the leakage current flowing through the insulation system of the tested object and apply it to the insulation system at a voltage higher than the working voltage; while the power leakage current (contact current) is to measure the leakage current of the tested object under the most unfavorable conditions (voltage and frequency) under the normal operation of the tested object. In short, the leakage current of voltage withstand test is the leakage current measured without working power supply, and the power supply leakage current (contact current) is the leakage current measured under normal operation. View >>

Date：2021-10-29 17:41:12

The process that the surface of solid insulating material gradually forms a conductive path under the combined action of electric field and electrolyte is called leakage marking. The ability of insulating material surface to resist leakage scratch is called resistance to leakage scratch. View >>

Date：2021-10-29 17:24:00

Measuring the insulation of electrical equipment is a work often carried out by power operators. Qualified insulation is an important index whether electrical equipment can be put into operation. Insulation is a safety measure to isolate or wrap the charged body with non-conductive substances to protect against electric shock. Simply put, the insulation resistance of electrical equipment is the ability to isolate voltage. Insulation test is a test to test the dielectric strength of insulating materials or insulating structures of electrical equipment. The purpose is to check the safe operation of products and equipment and prevent dangerous accidents caused by short circuit. View >>

Date：2021-10-29 17:05:00

Grounding resistance is an important parameter used to measure whether the grounding state is good. It is the resistance encountered by the current flowing from the grounding device to the earth and then flowing through the earth to another grounding body or spreading to a distance. It includes the resistance of the grounding wire and the grounding body itself, and the contact resistance between the grounding body and the earth, And the earth resistance between the two grounding bodies or the earth resistance from the grounding body to infinity. The grounding resistance directly reflects the good contact between the electrical device and the "ground", and also reflects the scale of the grounding grid. The concept of grounding resistance is only applicable to small grounding grid; With the increase of the floor area of grounding grid and the decrease of soil resistivity, the role of inductive component in grounding impedance is becoming larger and larger. Large grounding grid should adopt grounding impedance design. View >>

Date：2021-10-29 15:23:00

Contact resistance test, also known as ductor test, measures the resistance of electrical connections - terminals, connectors, connectors, bus sections or cable connections, etc. Such measurements are made on components such as connectors, relays and switches. Contact resistance test can understand the connection quality and conductive characteristics of the line, so as to avoid dangerous overheating of the contact. View >>

Date：2021-10-28 16:57:26

The electrical performance test includes the basic parameter test of conductor or insulation quality, such as conductor resistance, insulation resistance, correct value of dielectric loss angle, capacitance, etc. The higher the working voltage of the cable, the stricter the requirements for its electrical performance. View >>