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
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
The use of a multimeter can be divided into the following types: First, turn the knob to the AC voltage measurement position, perform mechanical zeroing, and when the value is zero, use the two probes to contact the live wire and the neutral wire of the circuit to be tested. Second, turn the knob to … Read more
01 DM3068 Digital Multimeter 1. DM3068 Digital Multimeter This is a RIGOL six-and-a-half digit digital multimeter, model DM3068. Yesterday, while using this multimeter in DC mode to test the DC signal in a square wave signal, I encountered a major pitfall. The frequency of this square wave signal is 1kHz, with a low level of … 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
How to Measure Leakage Current with a Multimeter? How to measure leakage current with a multimeter, methods for measuring leakage current. Using the continuity setting of the multimeter, measure the ground against the part of the circuit being tested. If the meter shows a resistance value, it indicates that there is no insulation. However, in … Read more
A multimeter can be used to measure current, and when measuring current with a multimeter, it is important to distinguish between direct current (DC) and alternating current (AC). Below is an explanation using the Victory digital multimeter: If you are repairing electronic circuit boards, you will mostly be measuring DC current, and most of it … Read more
Whenever a circuit board fails to operate normally, and the wiring checks out, it is very likely that an electronic component has failed. To repair it, you must identify the faulty component and replace it. However, locating the faulty component requires technical skills and certain techniques. Today, I will teach you how to use a … Read more