This is a supplement to previous content. Earlier, we published an article on measuring breakpoints, and many friends mentioned the use of multimeters. Indeed, we have published relatively little content on the use of multimeters, but they are quite versatile in practical projects. So let’s explore this topic together. 1. What is a Multimeter Also … Read more
Appearance of Multimeter A multimeter is an instrument used to measure parameters such as voltage, current, and resistance. It comes in two types: analog and digital, as shown in Figure 1. Figure 1 Multimeter Preparation Before Using the Multimeter (1) Place it horizontally. Position the multimeter horizontally. (2) Check the needle. Check if the multimeter … Read more
Recently, a colleague at the company asked me: “Can an oscilloscope be directly connected to the 220V voltage between the live wire and the neutral wire? Will it blow up?” Because it indeed exploded once before, it left a lingering fear~ I believe many of you have similar questions, so today I will summarize this … 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
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
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
Search on WeChat Technical Training The clamp multimeter is composed of a current transformer and a meter. The core of the current transformer can open when the clamp is tightened; the wire carrying the current to be measured can pass through the gap of the opened core without being cut, and when the clamp is … Read more
★ The diagram helps to understand the internal principles of the multimeter, why it can measure high voltage, and under what circumstances measuring high voltage could damage the meter. The diagram can be used to repair multimeters and to create multimeters. 1. DC 2.5V. Set the left switch to 2.5V and the right switch to … Read more
Click “Read the Original Text” or scan the QR code to grab the order Correctly using a multimeter can not only quickly and accurately identify the fault location but also prevent damage to electrical equipment and the multimeter itself. 1. Before measuring, check the range; don’t measure without checking. Every time you pick up the … Read more
The multimeter distinguishes between live and neutral wires. Pointer Multimeter Distinguishes Live and Neutral Wires (1) Contact Measurement Method Set the multimeter switch to AC 250V or 500V. Connect the first probe to one end of the power supply and the second probe to ground (for example, on a water pipe, radiator, or damp ground). … Read more