Date：2021-08-05 16:05:00

According to the RoHS regulations issued by the European Union, the limits of six hazardous substances in electronic components, lead, mercury, cadmium, hexavalent chromium, polybrominated diphenyl ethers and polybrominated biphenyls, shall not exceed 1000ppm, of which the limit of cadmium is 100ppm. Those meeting these requirements are environmental protection products. The ROHS test report issued by the third testing organization is required for evaluation. RoHS is a mandatory standard formulated by EU law, with the full name of restriction of hazardous substances. This standard was officially implemented on July 1, 2006. It is mainly used to standardize the material and process standards of electronic and electrical products to make them more in line with the requirements of human health and environmental protection View >>

Date：2021-08-04 14:19:04

With the rapid development of science, technology, economy and trade, the development and utilization of natural resources, the environment encountered in the storage, transportation and use of various products is becoming more and more complex and harsh. From tropical zone to cold zone, from plain to plateau, from ocean to space and so on, both users and producers are concerned about the performance, reliability and safety of products in the above environment, so as to ensure that products can work satisfactorily. Therefore, environmental tests must be carried out. View >>

Date：2021-08-04 14:07:23

The national military series standards for quality management and quality assurance (GJB / z9001-9004-96) issued in 1996 is prepared according to the requirements of the regulations on the quality management of military products (hereinafter referred to as the regulations) and on the basis of the corresponding national standards for quality management and quality assurance (GB / t19001-gb / t19004-1994). China's military standards are mainly divided into three categories: military specifications, military standards and guiding technical documents. View >>

Date：2021-08-04 13:43:00

Military standards are military standards. For example, the full name of China's military standards is the national military standards of the people's Republic of China, which means that the equipment meets the standards and specifications of military specifications or military purposes. It is similar to the national standard in nature and is a basis for testing whether a certain product is qualified or meets the fixed specification requirements. The release and implementation of military series standards have promoted the rapid development of the construction of military product quality management system and the improvement of military product quality and reliability. In order to help you have an in-depth understanding, this paper will summarize the relevant knowledge of military product environmental test and reliability test project standards. If you are interested in what this article will cover, read on. View >>

Date：2021-08-04 13:19:26

Mil-std-810 is a series of environmental test standards designed by the U.S. Department of Defense (DoD) for military products to test the reliability and durability of military products in a certain life cycle under a number of simulated harsh environments. This standard is also often used in general consumer electronics products to ensure that they can withstand the test in extreme environments and maintain the same performance. American Standard mil-std-810g certification test American Standard mil-std-810g does not refer to a test item. China's military equipment environmental test standard GJB150A is adapted based on American Standard mil-std-810g. It covers reliability tests such as climate environment and mechanical environment, compared with other common electronic equipment environmental tests View >>

Date：2021-08-03 18:32:00

Slicing is a sample preparation method of wrapping and sealing the sample with special liquid resin, and then grinding and polishing. The detection process includes sampling, sealing, grinding, polishing, and finally providing morphological photos, judgment or size of crack delamination. Slicing technology, also known as slicing or metallographic slicing and micro slicing (English Name: cross section, X-section), is the most commonly used sample preparation and analysis method to observe the cross-section structure of samples. View >>

Date：2021-08-03 17:34:00

Nondestructive testing refers to using the changes of thermal, acoustic, optical, electrical, magnetic and other reactions caused by abnormal internal structure or defects of materials to analyze the internal and surface structure, properties, state, type, quantity, shape, position, etc. of the test piece without damaging the service performance of the tested object and the internal organization of the tested object Methods of inspection and testing of dimensions. View >>

Date：2021-08-03 16:20:00

Plating is to coat a layer of plastic on the metal surface of some articles for good-looking or storage, or a thin layer of metal, or to imitate a precious metal, a thin layer of this precious metal is plated on the surface of ordinary metal. Coating thickness test the thickness test of metal and oxide coatings on the surface of materials. The surface covering layer is to make the material surface have certain strengthening, protection (such as anti-oxidation and anti-corrosion) decoration or special functions (such as conductivity, insulation, invisibility, etc.), and form one or more layers of covering layers with a certain thickness and different from the base material on the surface of metal or non-metal substrate by physical or chemical methods, so as to meet the requirements of product design and use. View >>

Date：2021-08-03 10:22:00

First, let's learn about component screening. Electronic component testing and screening service is also called secondary screening of electronic components. The secondary screening of electronic components refers to the screening of electronic components by the user or a third party entrusted by the user on the basis of the screening of component manufacturers. View >>

Date：2021-08-02 18:29:07

If the electronic components are not screened and tested before installation, once welded into the printed circuit board, it is found that the circuit can not work normally, and then check it, it will waste time and energy, and damage the components and printed circuit board. It is best to list the required components according to the circuit schematic diagram before hands-on preparation. In order to ensure that there is no waste of time and reduce errors in the trial production process, and ensure that the finished device can work stably for a long time, it must also be screened and tested after all components are prepared. View >>