For friends engaged in automotive electronics or related fields, the ability to quickly assess the operational status of the CAN bus is a very practical skill. Today, we will delve into the normal voltage range of the CAN bus and how to conduct basic fault diagnosis through voltage measurements. 1. Normal Voltage Range of the … Read more
The methods for determining the quality of electronic scale sensors are as follows: 1. Visual Inspection Check if the sensor casing is deformed, cracked, corroded, or damaged; any bending of the elastomer exceeding 0.1mm per meter is considered abnormal. Inspect the terminal connections for oxidation or looseness, check for any broken or damaged cables, and … Read more
In daily electrical maintenance or motor inspection work, determining the condition of a three-phase motor is a crucial skill. The multimeter, known as the “magic tool” for electrical maintenance, plays a significant role in this process. So, which setting should we use on the multimeter to assess the condition of a three-phase motor? Hello everyone, … Read more
Click on the above ” Technical Training “, select “Pin Public Account“ 160,000+ followers on the WeChat platform for industrial control: technical sharing, learning exchange, industrial control videos Tools/Materials:1. Analog multimeter2. AC contactor with three wiresMethod/Steps:1. We know that household 220V AC is very dangerous; as long as you do not directly touch the wire … Read more
Search on WeChatTechnical Training01Introduction to Digital Multimeter Digital 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 use this type of digital multimeter as an example to briefly introduce its usage methods and precautions.02Appearance of Digital Multimeter … Read more
Each STM32 chip has an internal reference voltage, equivalent to a standard voltage measurement point, connected to channel 17 of ADC1 inside the chip. According to the data in the datasheet, the typical value of this reference voltage is 1.20V, with a minimum of 1.16V and a maximum of 1.24V. This voltage does not significantly … Read more
Search on WeChatTechnical Training1. Voltage Checking Method The voltage checking method uses a voltmeter or multimeter on the AC voltage setting to measure live circuits, which is an effective method for locating fault points. The voltage checking method includes voltage step measurement and voltage segment measurement. (1) Voltage Step Measurement During measurement, first set the … Read more
Article from “Power Equipment Management” magazine The clamp ammeter is composed of a current transformer and an ammeter. 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 opening of the core without being cut. When the clamp is released, … 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
Most MCU pins cannot measure negative voltage. Therefore, to achieve the collection of both positive and negative voltages, the circuit shown in Figure 1 can be used. This circuit converts negative voltage to positive voltage, and the specific principle is as follows. Figure 1 According to the virtual short concept, we can set the voltages … Read more