Date：2022-09-29 14:11:44

Generally speaking, soldering tin is an alloy composed of tin (melting point 232 degrees) and lead (melting point 327 degrees). Soldering tin is an important industrial raw material for wire welding. It is widely used in the electronic industry, common household appliances and so on. It can be said that we cannot live without tin. In order to help you understand, the following contents are organized by the Core Creation Testing Network for your reference. View >>

Date：2022-09-29 14:07:49

The product quality inspection report shall be handled in the quality inspection and supervision offices of various provinces and cities. The inspection report, also known as the "inspection report of damaged goods", is an objective written certificate issued by the inspection agency after the inspection of damaged goods at the request of the applicant. In international trade, independent inspectors with credit, authority and detachment are often entrusted to inspect the extent of damage and identify the goods. Article 14 of the Product Quality Law The State shall, in accordance with the internationally accepted quality management standards, implement the enterprise quality system certification system. This paper collects and sorts out some materials, hoping to be of great reference value to all readers. View >>

Date：2022-09-28 11:52:09

The application fields of electronic and electrical products are becoming wider and wider, and the environmental conditions they are subjected to are becoming more and more complex and diverse. Only when the environmental conditions of the products are reasonably specified and the environmental protection measures of the products are correctly selected, can the products be protected from damage during storage and transportation and be safe and reliable during use. In our natural environment, temperature and humidity are two inseparable natural factors. Different regions have different temperature and humidity effects due to different geographical locations. Therefore, the artificial simulation environment test of electronic and electrical products is to ensure their safety and reliability in production, transportation, use and other aspects. View >>

Date：2022-09-28 11:50:39

With the increase of electronic equipment, there are more and more PCBA processing industries. The inspection of PCBA circuit boards after welding is very important for PCBA processing manufacturers and customers. In particular, many customers have strict requirements for electronic products. If they do not check, performance failures are likely to occur, affecting product sales, as well as corporate image and reputation. Then, how to detect the quality of PCBA circuit board after welding? Next, let's introduce it to you. View >>

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 >>