Grounding method of anti-static rubber mat
The grounding method of anti-static rubber mat needs to be standardized in combination with specific scenarios and facility conditions. The following is a summary of key steps and precautions:
1. Standard grounding steps
Laying anti-static rubber mat
Lay the anti-static rubber mat flat on the operating table or the ground, ensuring that there are no wrinkles or bubbles, and covering the entire work area. If it is laid on the ground, the joints can be filled with transparent silicone or overlapped cutting method to achieve seamless splicing.
Install grounding wire
Choose a location : Make a small cut in the corner or edge of the rubber mat, insert the star claw part of the grounding wire, and ensure that the star claw is in close contact with the mat surface;
Material requirements : The grounding wire must be a conductive wire that meets the standard, and preferably a grounding wire with a 1 megohm resistor.
Connect the grounding bus
The other end of the grounding wire is fixed to the anti-static grounding bus or metal conductor plate (such as a grounded equipment frame) through an alligator clip. If the workbench or trolley itself has been effectively grounded, the rubber mat can be directly connected to it without additional grounding.
Conductivity verification
Use an ohmmeter to measure the resistance between the surface of the rubber pad and the grounding point (such as a metal conductor plate) to ensure that the conduction resistance meets the requirements (usually less than 10⁹Ω). If the resistance exceeds the standard, check the grounding wire connection or add a wire to assist in conduction.
2. Grounding precautions
Grounding wire performance
Avoid using wireless grounding devices or ordinary wires without resistors, and ensure that the grounding wire contains a 1 megohm current limiting resistor to prevent accidental electric shock.
Environmental adaptability
In a dry environment (humidity <40%), it is necessary to strengthen the grounding system inspection. Insufficient humidity may reduce the anti-static effect;
When laying the floor, it is recommended to choose a rubber pad with a thickness of ≥3mm to avoid the edge warping due to being too thin and affecting the conductivity.
Regular maintenance
Regularly check whether the grounding wire connection is loose and whether the alligator clip is oxidized, and confirm the effectiveness of the system through resistance retest.
3. Scenarios Optimization Suggestions
Laboratory/clean room: A complete protection system needs to be formed by combining anti-static workbench, wrist strap, etc. Operators need to wear anti-static wrist straps and ensure that they are connected to the rubber pad;
Electronic production line: It is recommended to lay a conductive copper foil grid under the rubber pad and enhance the efficiency of electrostatic discharge through multi-point grounding.
The effectiveness of the anti-static rubber pad can be ensured through standardized grounding operations and periodic verification, avoiding interference of static electricity accumulation on sensitive equipment or production processes.