The role of anti-static dual-circuit wrist strap

The function of the anti-static double-circuit wrist strap is to introduce static electricity into the earth through the static grounding wire through a 1 megohm resistor in the plastic box on the wrist strap and the wire. The series resistor is mainly for personal safety to discharge static electricity. It can avoid the impact on the components during the momentary high current and avoid the damage of the components. The anti-static wrist strap with copper wire works: the human skin is in direct contact with the electrostatic conductive material on the wrist strap. When the wrist strap is grounded, it passes through the grounding system. Quickly discharge static electricity generated by human movement; index: rubber disc type (white yarn/black yarn); static electricity discharge time: less than 0.1s. The copper wire anti-static wrist strap is a high-grade wrist strap with "Ohm" logo. Copper wire anti-static wrist strap is composed of elastic bracelet or velcro ring, metal ring, rubber ring, slingshot wire, and alligator clip. It has the characteristics of fast power dissipation (S<0.1 second), durable (the curve can resist bending for 30,000 times), safe (built-in 1MΩ current limiting resistor), and can be cleaned repeatedly.

The anti-static double-circuit wrist strap plays a very important role in the electrostatic protection system of the electronics manufacturing industry. Whether it can discharge static electricity normally is related to the safety of the product. Why are many large companies requiring ESD certification for production lines? For ESD certification, it is necessary to carry out anti-static technical service guidance before certification, carry out electrostatic protection design and planning for the production environment of the enterprise, check and accept the electrostatic protection facilities in the anti-static work area after matching, and provide ESD technical knowledge training for relevant technical personnel. After implementation, if the anti-static wrist strap cannot be used normally, and the static electricity generated at the production site cannot be released, it is certain that the ESD certification cannot be passed, and there is no way to obtain a valid ESD certification certificate. The anti-static double-circuit wrist strap is used to discharge the static electricity of the human body. It consists of elastic bands, movable snap buttons, and spring cords. Composed of protective resistors and plugs or collets. The inner layer of the elastic band is woven with antistatic yarn, and the outer layer is woven with ordinary yarn. Main indicators Spring cord length 250cm Leakage resistance 106Ω (protection resistance 106Ω). The detailed introduction of the anti-static wrist strap The wireless electrostatic wrist strap is developed based on the physical principle of (static voltage balance), based on the principle of "static engineering" that static electricity is transmitted by pushing and pushing between ions. Due to the characteristics of static electricity pushing from high electricity to high potential, the electrostatic ions of the human body are pushed into the design (collection area) of the drought disaster body. Through [charge induction principle], the front and back surfaces of the conductive plate will be respectively charged with "equal and opposite charges" -Skin effect, due to the built-in ion exchanger <Utilizing its low free energy characteristics>, it can easily neutralize the introduced electrostatic ions with the same amount of opposite charges, so it can achieve the effect of electrostatic discharge. A screw is arranged on the outside to connect with the inner conductor loop.

For customers who are still using the cordless anti-static double-circuit wrist strap, use it as little as possible, because the principle of the cordless anti-static double-circuit wrist strap is to use the principle of corona discharge to dissipate part of the static electricity. Corona discharge is also called tip discharge, which refers to the conductor After being charged by itself, the voltage usually needs to exceed 1500V, and its tip part will discharge the air to dissipate static electricity. The static voltage required for cordless wrist strap dissipation is too high, which is not suitable for the electronics manufacturing industry. Currently, it can withstand 1500V There are very few electronic components above the static voltage.