All multimeters are equipped with a dial on the front, which not only has several scales corresponding to various measurement items but also includes various symbols, scale lines, and values, as shown in the figure. Correctly reading and understanding these symbols is fundamental to effectively using a multimeter. Letter Symbols and Their Meanings on Multimeters … Read more
2. Characteristics and Identification of Resistor Damage Many beginners often struggle with resistors when troubleshooting circuits, taking them apart and re-soldering them. In fact, after gaining some experience, understanding the characteristics of resistor damage can save a lot of unnecessary effort. Resistors are the most numerous components in electrical devices, but they are not the … Read more
1. Observation Method When we receive a circuit board for repair, the first step is to carefully observe its appearance. If the circuit board has been burned, it is crucial to check whether the power circuit is functioning correctly before powering it up, ensuring that no further damage will occur. The observation method is a … Read more
1. Fault Characteristics and Repair of Damaged Capacitors on Engineering Circuit Boards The faults caused by capacitor damage are the most common in electronic devices, especially the failure of electrolytic capacitors. The manifestations of capacitor damage include: 1. Reduced capacitance; 2. Complete loss of capacitance; 3. Leakage; 4. Short circuit. The role of capacitors in … Read more
1. Repair Procedure for Burnt IGBT or Fuse on the Circuit Board If the current fuse or IGBT is burnt, do not replace the component immediately. You must confirm that the following other components are in normal condition before replacement; otherwise, the IGBT and fuse may burn out again. 1. Visually check if the current … Read more
1. Fault Characteristics and Repair of Capacitor Damage in Industrial Control Circuit Boards Capacitor damage is the most common fault in electronic devices, particularly with electrolytic capacitors. The symptoms of capacitor damage include: 1. Decreased capacitance; 2. Complete loss of capacitance; 3. Leakage; 4. Short circuit. The role of capacitors in circuits varies, leading to … Read more
A multimeter is an essential measuring instrument in electrical and electronic departments. As temperatures gradually drop and rainy, humid weather increases, the number of reports regarding electrical leakage faults has also risen. I believe many friends have been thinking hard about finding the cause of electrical leakage. In fact, we can easily find the cause … Read more
A multimeter, also known as a volt/ohm meter or multitester, is a versatile measuring instrument capable of measuring various electrical properties such as direct current, direct voltage, alternating voltage, resistance, and audio levels. Some models can also measure alternating current, capacitance, inductance, and certain semiconductor parameters. It is a commonly used tool for electricians. 1. … Read more
How to use a multimeter? This is a small problem for many new electricians or home users; having a multimeter but not knowing how to use it. Today, we will talk about the functions of the multimeter. The multimeter is an essential measuring instrument for electricians, primarily used for measuring voltage, current, and resistance. Multimeters … Read more
Click on the ” Jicheng Training ” above, and select “Pin to Top Public Account” Over 110,000 industrial control professionals follow this WeChat platform: technical sharing, learning exchange, industrial control videos How to Use a Multimeter Correctly? 1 Introduction to Digital Multimeters Digital measuring instruments have become mainstream because they are highly sensitive, accurate, clearly … Read more