Before measuring circuits with a multimeter, understand 5 basic circuit concepts. ■ Circuit: Also called a loop, it refers to a closed circuit that runs from one end of the power source through the load and finally returns to the other end of the power source. ■ Open Circuit: Also called a break circuit, when … Read more
For multimeters, I believe that many electricians engaged in maintenance are no strangers to them. After all, it would be absurd to say that any electrician does not know how to use a multimeter. Although most electricians are familiar with the functions and usage of multimeters, it is crucial to pay attention to the proper … Read more
1. Quick Methods to Determine Motor Condition: 1. Use a multimeter to measure the DC resistance of the motor’s three-phase windings. The closer the results of the three measurements are, the better. A resistance difference within 2% is acceptable. If the difference exceeds 10%, the winding with the lower resistance may have an inter-turn short … Read more
The multimeter is our eyes; without it, we would find it difficult to fix various faulty machines. However, blindly trusting measurement results can sometimes lead us into a confusing world, [excluding cases of multimeter malfunction and inaccurate measurements]. Here are a few simple examples: A modified board machine had a faulty abl resistor, causing the … Read more
Correctly using a multimeter not only allows for quick identification of faults but also prevents damage to electrical devices and the multimeter itself. Below are some tips for using a multimeter. Check the range before measuring, do not measure without checking Do not change the range while measuring, switch to the off position after measuring … Read more
In the battery industry, it is essential to learn how to correctly use a multimeter. Besides measuring voltage and current, it can quickly identify where a fault has occurred and prevent damage to both the electrical devices and the multimeter itself. Below are some essential tips for using a multimeter. Check the range before measuring, … Read more
During the process of troubleshooting circuit faults, if there is no circuit diagram for reference and the fault being handled is relatively complex, it is necessary to draw a circuit diagram based on the actual situation of the components and printed circuit on the PCB. 1. Basic Ideas and Methods for Drawing Circuit Diagrams from … Read more
With the rise of healthy eating, the air fryer, which claims to fry chicken nuggets and fries without oil and can also be used for baking with just one button, has become a favorite small appliance for food lovers. A friend bought a second-generation Liven (利仁) air fryer (model LR-KZ880, infrared heating tube, 10 liters … Read more
This week, we share a case analysis: Title: Skyworth 32E55HE Color LCD TV Malfunction Engineer Name: Zhang Chenhao Device Name: Color LCD TV Device Model: 32E55HE Serial Number: N.A Malfunction Phenomenon: Repeated Restarting Abstract This color LCD TV is used for central monitoring display, summarizing and displaying data information from multiple monitors in real-time. This … Read more
How can I log into the Huawei router settings interface via http://192.168.3.1? How do I set up the Huawei router backend through http://192.168.3.1? Answer: The default login IP address for Huawei and some Honor series routers is 192.168.3.1 or http://192.168.3.1, not the “http//:www192.168.3.1” or “http//192.168.3.1” mentioned in the question. The IP addresses are correct, but … Read more