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Technical characteristics of DT830 digital multimeter DT830 digital multimeter is a small digital multimeter with three and a half digits liquid crystal display, which can measure AC and DC voltage, AC and DC current, resistance, capacitance, transistor 6 value, diode conduction voltage and circuit short circuit, etc. The measurement is changed by the rotary band […]

About the common faults and solutions of MF47 multimeter The failures and solutions that MF47 type multimeters often appear in student experiments. Fault 1: 0.5 A fuse is blown, causing no current input fault, all gears cannot be measured. After disassembling the multimeter, measure the input fuse and found that the fuse has been blown. […]

About audio level measurement (1) The use of the multimeter dB block. There is a dB scale line on the dial of the multimeter, and it is written in the instruction manual to measure the audio level. Level is a parameter or quantity of electric power and voltage, and it needs to be expressed with […]

The basic functions and usage of a multimeter MF47 type multimeter is a portable multi-range multimeter of magnetoelectric rectification system. It is novel in design and easy to use. It can be used to measure DC current, AC and DC voltage, DC resistance, etc. It has 26 basic ranges and levels, capacitance, inductance, 7 additional […]

Precautions for the use of MF47 multimeter When entering the laboratory, you must follow the safety rules and regulations of the laboratory to operate. Although the multimeter has a double protection device, in order to avoid accidents and burn the meter, you must operate according to the following requirements. (1) When measuring high voltage or […]

DIP plug-in post-welding production process training materials of the plug-in post-welding factory Production flow chart of plug-in line in plug-in post-welding processing plant DIP plug-in post welding production flow chart 1. After the plug-in welding processing factory DIP plug-in welding and the preparation before production Material preparation: 1. The material personnel of the production line […]

BGA solder joint shape and thermal reliability CAD (1) PBGA solder joint thermal stress and strain finite element analysis model The thermal stress and strain analysis of PBGA solder joints generally uses mathematical simplification methods to determine the key solder joints and the corresponding thermal deformation displacements where the stress and strain are greatest in […]

The construction of SMT product assembly quality management system will eventually achieve the following goals: (1) Establish a reliable and complete quality assurance system; (2) Use computer and network database, expert system and other technologies to complete quality data collection, statistics, analysis and feedback; (3) Realize product quality inspection and control in the assembly and […]

About the functions and performance requirements of the SMT quality management system Function description of quality management system The functions of SMT product assembly quality management system mainly include the following: (1) Product design quality verification Including product design and assembly process standards, specification verification and product technical index verification, etc. (2) Quality inspection and […]

SMT quality management system establishment procedures The process of establishing a quality management system can be divided into three stages: preparation stage, program design stage, and organization implementation stage. (1) Preparation stage The preliminary preparations for establishing a quality management system mainly include unifying guiding ideology, implementing organizational structures, and training technical backbones. The establishment […]