Anti-static workbench design choice
The anti-static workbench is a special workbench equipped with EPA. It is one of the core parts of EPA protection. It should be equipped with grounding in addition to anti-static workbench and wristband, anti-static chair and anti-static tools. Monitor to keep the operator informed of the grounding system. The material of the anti-static table should be grounded in all necessary ways. In order to prevent any bare metal from directly shorting to the ground and causing damage, a 1 megohm connection grounding bus is used. Similarly, the wrist strap is connected to the ground return line and is also grounded with a 1 megaohm resistor, such as an alligator clip, banana head or snap button.
Operating ESDS sensitive devices and electronic equipment on such a work surface can prevent damage caused by electrostatic discharge, electrostatic induction or electrostatic adsorption.
Among them, the wrist strap connecting device, the current limiting resistor and the grounding lead are special components of the anti-static safety workbench. The wrist strap connector is designed to provide an anti-static wrist strap. The 1 megaohm current limiting resistor of the wristband is designed to ensure the safety of the human body. It enables the safe current through the human body to be no more than 5 mA in case of electric shock, etc.; the grounding lead is grounded for the antistatic workbench. And configured. Anti-static workbench has different forms and various components, but five essential parts: workbench, anti-static countertop pad, wristband connection device, current limiting resistor and grounding lead.
In the material, the ordinary anti-static work surface substrate is made of wood or other inorganic materials, the countertop can be affixed with a veneer, and the anti-static safety workbench is replaced with an anti-static table mat. The hard table mat is mainly used in the first-class anti-static work area, but its surface resistance or volume resistance should meet 2.5*10^4 ohms - 1.0*10^9 ohms. The wrist strap connection is a necessary device for grounding the anti-static wrist strap worn by the human body. This article proposes the installation location requirements from the perspective of ergonomics.
At present, there are anti-static wrist strap products with button-type current limiting resistors. Therefore, this specification does not require the installation position of the current limiting resistor. However, the current limiting resistor should be regarded as an essential component of the antistatic workbench regardless of the situation.
In the case where multiple anti-static safety workbench is required, the grounding wires must not be connected in series in order to ensure reliable grounding of each station.
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