This is how you can test the resistance of a soldering iron.
Electric soldering iron is an essential tool for electronic production and electrical maintenance, mainly used for soldering components and wires. It can be divided into internal heating electric soldering iron and external heating electric soldering iron according to mechanical structure, non suction soldering iron and suction soldering iron according to function, and high-power electric soldering iron and low-power electric soldering iron according to different purposes.
The electric soldering iron test includes three parts: ground resistance test (cold/hot state), leakage voltage test, and leakage current test.
1. Ground resistance test of electric soldering iron in cooling state:
In the absence of power, connect one end of the multimeter probe to the ground terminal of the power plug and the other end to the tip of the soldering iron to test the data;
2. Grounding resistance test of electric soldering iron in heating state:
Plug in the power, turn on the soldering iron, and connect one end of the multimeter probe to the grounding terminal of the socket, and the other end to the test board that is in contact with the soldering iron. Measure the results;
3. The leakage voltage test and leakage current test of electric soldering iron are similar to the resistance test method. It should be noted that the multimeter needs to switch gears or adjust the position of the multimeter probe wire when measuring current.
solder
Solder is a type of fusible metal that can connect component leads to the connection points of printed circuit boards. Tin (Sn) is a soft and ductile silver white metal with a melting point of 232 ℃. It has stable chemical properties at room temperature, is not easily oxidized, does not lose its metallic luster, and has strong resistance to atmospheric corrosion. Lead (Pb) is a relatively soft light blue white metal with a melting point of 327 ℃. High purity lead has strong resistance to atmospheric corrosion and good chemical stability, but is harmful to human health. Adding a certain proportion of lead and a small amount of other metals to tin can produce a solder material with low melting point, good fluidity, strong adhesion to components and wires, high mechanical strength, good conductivity, low oxidation, good corrosion resistance, and bright and beautiful solder joints. It is generally called solder. Soldering can be divided into 15 types based on the amount of tin content and impurities
The chemical composition is divided into three levels: S, A, and B. Wire soldering is commonly used in manual welding. (There are also environmentally friendly lead-free soldering materials commonly used nowadays)
