Why add a 1 megohm resistor between the electrostatic bracelet and the electrostatic grounding wire
First of all, it is necessary to understand that in the production processes of the electronics factory, it is necessary to protect the personal safety of employees like ordinary enterprises, but also to protect the safety of electronic products, because electronic products are more susceptible to electrostatic breakdown and damage. The design of the anti-static wrist strap not only considers the release of the static electricity accumulated and generated by the human body as soon as possible (discharged at the fastest speed) to the electrostatic network grounding line (usually called release to the earth), but also considers the current during the release process It cannot be greater than the human body safety current 5mA. After theoretical calculations on both sides (calculated by experts), take the middle value of 10 6 under square ohms (ie 1 megohm resistance value) as the series resistance of the electrostatic bracelet.
The electrostatic bracelet is divided into wired and wireless. The other end of the wired is grounded. The static electricity generated on the human body can be introduced into the earth anywhere to achieve the effect of static electricity removal. However, it must be well grounded. Now all electronic processing companies have 95 % Of customers are using wired wrist straps. The principle of wireless is to accumulate the static electricity of the human body in the bracelet, and when it reaches a certain charge, it will be discharged through corona, but the principle is the principle, the effect is not obvious, it can not be said that it is useless, it can only be said that the effect is as wired In comparison, it's not too good.