The role of anti-static wrist strap
1. The wired anti-static wrist strap is introduced into the earth through an anti-static grounding wire through a 1 megaohm resistor and wire in the plastic box on the wristband. The series connection is mainly for personal safety considerations.
Generally, there are three ways to handle static electricity:
1) Direct discharge is to discharge static electricity to the ground through an electrostatic wristband;
2) Neutralization by static and negative ions in the air and static electricity generated by itself;
3) The static electricity is consumed by the power consuming material;
The wired anti-static wrist strap is discharged through a 1M ohm resistor. The purpose is to avoid the impact of the momentary high current on the component and avoid damage to the device! In the test of the factory electrostatic protection system, some measures were found to have no antistatic effect.
Such as anti-static chairs, anti-static logistics vehicles. There is no effect, just do the test. It can be tested by triboelectric test, and good things will not produce voltages higher than 10V.
The function of the 1M ohm resistor is to keep the impedance of the static power supply to the earth at a suitable resistance, so that the static electricity can be quickly discharged to the earth without generating excessive current, damaging the equipment, and people will not feel pain. sense. Others such as the ground, desktop, logistics vehicles, workstations, clothes, shoes, hats, gloves, etc. are the same.
2, cordless anti-static wrist band theory is to use the principle of corona discharge to dissipate a part of static electricity, corona discharge is also called tip discharge, is the guide body itself after charging, usually requires a voltage of more than 1500V, its tip part will discharge the air In order to dissipate static electricity, the static voltage required for dissipating static electricity of the cordless wristband is too high, which is not suitable for the electronics industry, because there are many electronic components that can withstand high voltages above 1500V.
