Date：2022-07-21 17:39:27

First of all, the soldering temperature should not be too high, and the soldering time should not be too long to prevent the crystal from internal change and instability. When the shell of the crystal oscillator needs to be grounded, it should be ensured that the shell and pins are not accidentally connected to cause a short circuit. Thus, the crystal will not vibrate. Ensure that the solder points of the two pins are not connected, otherwise the crystal will stop vibrating. For crystal oscillators that need to be cut, attention should be paid to the influence of mechanical stress. After soldering, clean it to prevent the insulation resistance from failing to meet the requirements. View >>

Date：2022-07-20 15:02:42

There are patch crystal oscillator and plug-in crystal oscillator, passive crystal oscillator and active crystal oscillator with voltage. Crystal oscillator is very easy to damage. When choosing crystal oscillator, we should not only consider the cost performance, but also the matching of crystal oscillator parameters. What are the faults after the crystal oscillator is damaged? What are the causes of failure? This article has collected and sorted out some materials, which are expected to be of great reference value to readers. View >>

Date：2022-07-20 14:57:51

Static electricity and electrostatic discharge (ESD) are everywhere in our daily life, especially when handheld electronic devices are developing in the direction of lightweight and compact, and product functions are increasing, their input / output ports are also increasing, resulting in electrostatic discharge entering the system and interfering with or damaging integrated circuits. Semiconductor materials and devices have higher and higher requirements for electrostatic control in the process environment of production, assembly and maintenance. The harm of electrostatic discharge to the reliability of devices has become more and more significant. In order to help you understand in depth, the following contents are sorted out by Chuangxin testing network for your reference. View >>

Date：2022-07-18 14:38:27

Salt spray test is a kind of natural environment test that mainly uses the artificial simulation of salt spray natural environment created by salt spray test machinery and equipment to evaluate the corrosion resistance of products or metal materials. The salt spray detection standard is to make specific provisions on the temperature, humidity, concentration of sodium chloride solution, pH value and other salt spray detection conditions. In addition, the technical requirements for the performance of the salt spray tester are put forward. The evaluation methods of salt spray test results include grade evaluation method, weighing evaluation method, corrosion occurrence evaluation method and corrosion data statistical analysis method. The products that need salt spray test are mainly some metal products, and the corrosion resistance of the products is tested. The following is a brief analysis of salt spray test for your reference. View >>

Date：2022-07-18 14:35:00

RoHS is the English abbreviation of the restriction of the use of certain hazardous substances in electrical and electronic equipment. ROHS standard: iec62321, directive 2011/65/eu. You are no stranger to RoHS. Recently, many people asked what are the 10 RoHS tests? What is the test standard? This article has collected and sorted out some materials, which are expected to be of great reference value to readers. View >>

Date：2022-07-18 14:30:00

RoHS is a mandatory standard formulated by EU legislation. Its full name is the restriction of hazardous substances. The standard has been officially implemented since July 1st, 2006. It is mainly used to regulate the material and process standards of electronic and electrical products, making it more conducive to human health and environmental protection. View >>

Date：2022-07-14 18:27:45

Aluminum electrolytic capacitor is made of aluminum cylinder as negative pole, which is filled with liquid electrolyte and inserted with a curved aluminum strip as positive pole. It also needs to be treated with DC voltage to form a layer of oxide film on the positive plate as the medium. In order to help you understand in depth, this paper will summarize the relevant knowledge of aluminum electrolytic capacitor failure mode. If you are interested in what this article will cover, then read on. View >>

Date：2022-07-14 18:25:58

Insulation resistance is the most basic insulation index of electrical equipment and electrical circuits. The detection standard of insulation resistance in the electrical code is that the insulation resistance per kilovolt voltage is not less than 1 megaohm. Common safety test items are introduced as follows: View >>

Date：2022-07-13 14:58:24

Welding defect refers to the defect formed in the welding process of the welded joint. Product surface defect detection is an important link in industrial production and a key step in product quality control. With the help of defect detection technology, production quality and efficiency can be effectively improved. In order to help you have an in-depth understanding, this paper will summarize the relevant knowledge of welding nondestructive testing. If you are interested in what this article will cover, then read on. View >>

Date：2022-07-13 14:55:23

In short, nondestructive testing is to use the characteristics of sound, light, magnetism and electricity inside the inspection machine to detect whether there are defects or nonuniformity in the inspected object without damaging or affecting the service performance of the inspected object, give the size, location, nature and quantity of defects and other information, and then determine the technical state of the inspected object (such as qualified or not, residual life, etc.), This is a kind of testing method that does not damage or affect the future performance or use of materials or workpieces. The following mainly introduces the summary of common NDT methods. View >>