Introduction to Digital MultimetersDigital measuring instruments have become mainstream due to their high sensitivity, accuracy, clear display, strong overload capacity, portability, and ease of use.▲ Figure 1 Below, we will take this type of digital multimeter as an example to briefly introduce its usage methods and precautions. 02Appearance of Digital Multimeter 03Digital Multimeter Usage Diagram … Read more
Many electricians habitually use a shake table to measure the condition of motors in their daily work, which is undoubtedly a common and relatively safe testing method. Today, I will share how to use a multimeter to test the condition of motors, so that in case a shake table is unavailable, you can still measure … Read more
To check if the water pump motor coil is burned out using a multimeter, you need to measurethe continuity between the coil windings,short circuit conditions, andinsulation resistance. First, determine whether the motor is a three-phase or single-phase motor. The resistance values of the three-phase motor windings are the same, while the resistance values of the … Read more
1. Correct Use of Multimeter To correctly use a multimeter, familiarize yourself with the dial before use. Adjust the two zero position regulators gently. Choose the correct terminal, and insert the red and black probes into the correct holes. Rotate the switch to the correct gear. Choose the appropriate range for accurate measurements. Look at … Read more
Click the blue text to follow us Let me tell you, back in the day when there were no test diagrams, repairing a motherboard was like looking for a needle in a haystack. Now, with test diagrams, repair efficiency has at least tripled! However, I see many beginners looking at test diagrams as if they … Read more
1 Determine Whether a Circuit or Device is Live The digital AC voltage range is very sensitive, capable of displaying even the smallest induced voltages. Based on this characteristic, it can be used as a test pen. The method is as follows: set the multimeter to AC20V, keep the black probe unconnected, and touch the … Read more
The GF6018A Portable Multi-Product Calibrator Multimeter Calibrator is an advanced and versatile calibration tool designed to ensure the accuracy and reliability of various measuring instruments, including multimeters, temperature sensors, and other test equipment. With its compact and portable design, the GF6018A provides high-precision calibration for a wide range of instruments, making it an essential tool … Read more
Introduction With the widespread application of Type-C interfaces in electronic devices, the accuracy of the cable wiring sequence directly determines the device’s power supply, data transmission, and functional expansion capabilities. Only cables with a complete wiring sequence can meet the demands of high-speed data transmission. Cables lacking wire cores cannot support Thunderbolt and high-speed USB … Read more
Cannot be powered on Beep mode: Measure continuity: wires, fuses, switches. Ohm mode: Measure resistance: heating elements, motors, leakage. Ω = Ohm, KΩ = kilo-ohm, MΩ = mega-ohm (leakage) 1KΩ = 1000Ω, 1MΩ = 1000KΩ (common range: 2K) (grounding 20MΩ-200MΩ) Leakage: Measure insulation resistance. Greater than 0.5 mega-ohm: no leakage ✔ Less than 0.5 mega-ohm: … Read more
The methods are based entirely on the JJF 1587-2016 standard for the calibration of digital multimeters. I will elaborate on the parameters that customers generally need to measure and calibrate for multimeters.First, let’s understand the scope of this standard.Understanding the scope of the standard.Classification of multimeter displays For example, a 6.5-digit digital multimeter refers to … Read more