Date：2022-09-27 17:17:20

Resistance is the most numerous component in electrical equipment, but it is not the component with the highest damage rate. Open circuit is the most common resistance damage. It is rare for the resistance value to become larger, and it is rare for the resistance value to become smaller. The resistance of common carbon film, metal film resistor and wire wound resistor can be directly measured with the resistance gear of ordinary pointer multimeter. When the parameter mark of the resistor falls off for some reason or the precise resistance value is not known, it is necessary to measure it with an instrument. In order to help you understand, the following contents are organized by the Core Creation Testing Network for your reference. View >>

Date：2022-09-22 18:06:13

The weldability of metal materials mainly depends on the chemical composition of the materials, and is related to the complexity of the structure, rigidity, welding methods, welding materials used, welding process conditions and the use conditions of the structure. Solderability defines the wetting of solder to metal or metal alloy surfaces under the minimum appropriate conditions. This test evaluates the strength and wetting quality of solder by replicating the contact between solder and material. It determines the wetting force and the duration from contact to wetting force formation. View >>

Date：2022-09-21 16:11:23

Aging, also known as "sophistication", refers to the continuous application of a certain electrical stress to components at a certain ambient temperature for a long time, which accelerates various physical and chemical reaction processes inside the components through the combined action of electrical thermal stress, and promotes the early exposure of various potential defects hidden inside the components, so as to eliminate early failure products. Aging test is one of the screening methods to ensure the reliability level and quality of capacitors. Next, we will explain the relevant information of this test. View >>

Date：2022-09-20 15:03:05

Polymer materials are widely used in almost all fields, including lunch boxes, plastic bags, instrument equipment shells, wire and cable jackets, car bumpers, clothes, films, wind turbine blades, gears, structural parts, etc., and are widely used in people's daily life. At present, there are many aging test methods to study polymer materials, mainly including climate aging test, ultraviolet aging test, ozone aging test, hot air aging test, high and low temperature alternating aging test, damp heat aging test, medium aging test, salt spray aging test, etc. View >>

Date：2022-09-20 15:02:54

Aging test is mainly a high-intensity test to simulate various harsh conditions of products in the actual use process. At the same time, it can reasonably predict the service life of products according to the use requirements. High temperature aging test is also used to determine the adaptability of products to storage, transportation and use under high temperature climate conditions. The severity of the test depends on the high temperature and exposure duration. View >>

Date：2022-09-16 17:22:13

Capacitors are widely used in life and industry, and many devices have capacitors. In the absence of special instruments, the quality of capacitors can be detected and judged with multimeter resistance. This paper collects and sorts out some materials, hoping to be of great reference value to all readers. View >>

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 >>