Date：2022-09-15 16:42:44

The insulation resistance tester calculates the insulation resistance value according to Ohm's law. Output the DC voltage far lower than the dielectric strength test, and then measure the current to calculate the insulation resistance. High voltage insulation resistance tester is a commonly used and indispensable instrument for power, post and telecommunications, communication, mechanical and electrical installation and maintenance, as well as industrial enterprise departments using electricity as industrial power or energy. It is suitable for measuring the resistance of various insulating materials and transformers, motors, cables and electrical appliances. The following is a brief analysis of insulation resistance test for your reference. View >>

Date：2022-09-14 17:49:07

The results of salt spray test will be affected by various factors. The salt spray test of products is mainly used to assess the corrosion resistance of products or metal materials. Generally, the concentration of salt solution, the angle of sample placement, the pH value of salt solution, the test temperature and humidity, the amount of salt spray sedimentation, and the spray method can all affect the salt spray test. The main factors affecting the results of the salt spray test are described in detail below, hoping to be helpful to everyone. View >>

Date：2022-09-14 17:49:02

In the safety testing of electronic and electrical products, insulation and withstand voltage tests are one of the basic test items, and sometimes their test meanings are easily confused. Withstand voltage test and insulation test are both test methods for electrical equipment. However, the insulation test must be carried out before the withstand voltage test, because the withstand voltage test is a destructive test. Only by ensuring that the insulation of the equipment is OK, and then applying the withstand voltage test, the electrical equipment will not be unnecessarily burned. Today, we specially sorted out some differences between insulation and withstand voltage tests, hoping to help you. View >>

Date：2022-09-13 16:20:14

Generally speaking, the failure of ceramic capacitors means that they cannot work normally within normal working hours. Ceramic capacitors are mainly made of high dielectric constant materials - ceramics extruded into specific shapes as dielectrics, coated with metal films on the surface, and then sintered at high temperatures to form electrodes. They are encapsulated with epoxy resin. It is usually used in high stability oscillation circuits as circuits, bypass capacitors and pad capacitors. Then, what are the common causes of ceramic capacitor failure? This article has collected and sorted out some materials, hoping to have greater reference value for all readers. View >>

Date：2022-09-13 16:19:49

Salt spray test is to specify the conditions of salt spray test, such as temperature, humidity, concentration of sodium chloride solution and pH value, and also put forward technical requirements for the performance of salt spray test chamber. The purpose of salt spray test is to assess the salt spray corrosion resistance quality of products or metal materials. The judgment of salt spray test results is just the judgment of product quality. Whether its judgment results are correct and reasonable is the key to correctly measure the salt spray corrosion resistance quality of products or metals. View >>

Date：2022-09-09 15:57:15

Failure analysis of metal materials is a technology to analyze and study the damage causes of metal components or equipment that have lost their original functions. Technical analysis of major accidents caused by failure of metal materials is a complex process, which not only involves macro analysis, microstructure analysis, metallographic structure analysis, chemical composition analysis, hardness test, mechanical property test, stress test and other analysis and testing technologies, but also needs to combine a large number of test data and comprehensive information, including design scheme, heat treatment situation and use environment, Carry out a comprehensive and systematic discussion and analysis, and finally conclude and deduce the main causes of failure. Next, we mainly introduce the judgment basis of brittle fracture and ductile fracture. Let's have a look. View >>

Date：2022-09-09 15:54:51

When the humidity of the storage environment of electronic components is too high, moisture will enter the IC device through the bonding surface of the packaging materials and components, causing oxidation, corrosion and short circuit of the internal circuit, and the high temperature in the assembly and welding process will cause the humid gas entering the IC to expand and generate pressure, causing the plastic to separate from the inside of the chip or lead frame (delamination), wire binding damage, chip damage, internal cracks and cracks extending to the surface of the component, Even components swell and burst, which will lead to assembly repair or even scrapping. More importantly, those invisible and potential defects will be incorporated into the product, causing problems in the reliability of the product. Most other IC electronic components also have the hazard of moisture. It is very important to dry electronic components to remove oxidation. This article collects and collates View >>

Date：2022-09-08 17:25:23

Neutral salt spray test and alternating salt spray test are two types of corrosion environment test which are frequently used in salt spray test. In most cases, the neutral salt spray test uses a standard salt spray test chamber, and the alternating salt spray test process is more complex, using a composite salt spray test chamber. What are the differences between neutral salt spray test and alternating salt spray test? In addition to neutral salt spray test, salt spray test also includes acid salt spray test, acetate salt spray test, etc. neutral salt spray test and alternating salt spray test are also two types of corrosion environment test that are frequently used in salt spray test. What are the differences between them? Let's have a look! View >>

Date：2022-09-08 17:22:35

Nondestructive testing is divided into conventional testing technology and unconventional testing technology. Conventional testing technologies include ultrasonic testing (UT), radiographic testing (RT), magnetic particle testing (MT), penetrant testing (PT) and eddy current testing (ET). Unconventional nondestructive testing technologies include acoustic emission (AE), infrared (IR), laser holographic testing Holo View >>

Date：2022-09-07 16:46:21

Metallographic analysis is to observe the sample after grinding, polishing and etching through an optical microscope, which can analyze the true microstructure and morphological characteristics of the sample, and is the basis of the study of material mechanical properties. To a certain extent, the metallographic inspection of ordinary steel is not difficult, but with the application of new materials and technologies, the inspection range is constantly increasing, and the types of samples are also increasing. More countermeasures and technical methods are needed for practitioners. View >>