A digital multimeter is an electronic instrument used for electrical measurements. It can have many special functions, but its main functions are measuring voltage, resistance, and current. As a modern multipurpose electronic measuring instrument, it is primarily used in the fields of physics, electricity, and electronics. In daily life, you may encounter situations where household … Read more
① A good habit when using a multimeter is to check the dial setting before each measurement. Developing this habit will greatly reduce the chance of burning out the meter. ② Choose a range that keeps the pointer indicating around two-thirds of the full scale for more accurate readings. If you do not know the … Read more
Insulation resistance refers to the ability of electrical equipment’s insulation material to isolate current, which is an important indicator in safety testing of equipment. It can determine whether the insulator is intact, and identify defects such as moisture, insulation degradation, and insulation breakdown. Therefore, before using electrical equipment, it is essential to use an insulation … Read more
Search on WeChat Jicheng Training Practical tips for daily applications of PLCs, hoping to assist everyone in their daily use of PLCs. 1 Grounding Issues The grounding requirements for PLC systems are quite strict, and it is best to have an independent dedicated grounding system. Also, ensure that other devices related to the PLC are … Read more
Fire Alarm System Circuit Bus Short Circuit Handling Methods When a certain circuit bus of the fire alarm system experiences a short circuit and the current between wires is too high, the controller emits sound and light alarms, while displaying a short circuit on the LCD screen in Chinese (see the image below). The printer … Read more
1. Principle of Short Circuit Isolators The short circuit isolator is a device used in the transmission bus of fire alarm systems that isolates the branch line during a short circuit. It automatically makes the two ends of the short circuit section high resistance or open circuit, preventing damage to the controller and not affecting … Read more
This article overview Have you encountered occasional communication errors when debugging with the CAN or RS-485 bus? Or are you unable to receive data? Has a bus that has been functioning normally suddenly started to exhibit widespread errors or node failures? Are you at a loss for how to address these issues? Using bus isolation … Read more
DIY Installing Automatic Control Front Door Light For beautification, safety, and convenience, most homeowners in the U.S., especially those far from public lighting, choose to illuminate the lights in front of their doors and garages after dark. However, this brings about a problem, particularly for someone like me who often forgets things: I frequently forget … Read more