★ Digital multimeters are widely used in people’s daily life and study due to their simplicity, digital display, ease of operation, and strong anti-interference capabilities. This article briefly describes the common faults encountered during the use of digital multimeters and provides some daily handling methods. 1. Several Common Fault Analysis Methods for Digital Multimeters 1.1 … Read more
Measuring DC Voltage with a Multimeter (Task: Measure 9V Battery, 1.5V Battery) (1) When measuring DC voltage, identify the positive and negative terminals (the red probe connects to the positive terminal “+”, and the black probe connects to the negative terminal “-”). Connect the multimeter in parallel to the circuit being tested. Before measuring the … Read more
This article mainly introduces the design principles of digital multimeters and the calculation methods for average value and true RMS value, explaining the defects of the average value calculation method and the calculation method for true RMS value of AC signals superimposed with DC signals. It emphasizes the necessity of using multimeters with true RMS … Read more
Click on “Technical Training” above, and select “Top Official Account“ 160,000+ industrial control professionals follow our WeChat platform: technical sharing, learning exchanges, industrial control videos A multimeter is an essential troubleshooting tool for electrical maintenance personnel. The phrase “one person, one pen, one meter” vividly illustrates the basic requirements for electrical workers: electrician + test … Read more
Click Jicheng Training WeChatFollow me! ☀The official WeChat of Jicheng Training Network is the most professional and concentrated industrial control WeChat with the maximum number of users, providing technical sharing, free videos, and a communication platform. Follow Jicheng, and you will have no problem improving your skills! Source: Dianzhaoxiaoer Share Experience! Jicheng TrainingVideo Learning | … Read more
A new colleague joined the company, graduated in mechatronics, fair-skinned, a bit tall and thin, looking quite energetic. As an experienced electrician familiar with the environment and equipment at the unit, the leadership asked me to take him around for a few days to help him get acquainted. Perhaps being new to the field, he … Read more
Digital Multimeter The digital multimeter is relatively simple measurement equipment. In this article, the author will teach you the correct usage of a digital multimeter. Starting with measurement methods for voltage, resistance, current, diodes, transistors, and MOSFETs, you will better master the multimeter measurement techniques. Tip: Please watch the video in a WiFi environment~ 1. … Read more
Welcome to Reserve IIC Shenzhen – 2023 International Integrated Circuit Exhibition and Seminar Live Broadcast Previously, we disassembled two multimeters, both of which were low-quality counterfeit models that were just usable. This time, we will disassemble a legitimate, commonly used, and inexpensive model, the Elec EM33D. We can see that in all aspects, design and … Read more
Distinguishing between neutral and ground wires: The ground wire is required to be yellow/green striped during installation, so it can be identified by its color. The neutral wire is generally blue. 1. Set the multimeter range switch to the AC voltage setting, which should be available on all multimeters. 2. The range should be from … Read more
Three-phase asynchronous motors are widely used. When electricians are repairing motors, they often encounter some old motors that lack nameplates or markings, or the nameplates and markings are unclear. How to use a multimeter to determine and test the motor windings, number of poles, speed, etc., is discussed below. 1. Determining the Start and End … Read more