Common mistakes in anti-static methods in factories
1. No anti-static product testing equipment
The most common mistake is that many companies have purchased a lot of anti-static products, but they have not purchased some commonly used anti-static product testing instruments. We know that each product has a certain period of use, and the quality is good or bad. Without some commonly used testing equipment, we don't know whether the product is damaged or the quality is good. In this way, there is no anti-static effect.
2, the ground wire connection is not good
A. The anti-static system must have an independent and reliable grounding device, the grounding resistance should generally be less than 10Ω, and the burying and testing methods should meet the requirements of GBJ 97.
B. The anti-static ground wire must not be connected to the power neutral wire or shared with the lightning protection ground wire. Because lightning strikes and other phenomena will affect product performance and personal safety through the loop.
C. Use a three-phase five-wire system for power supply, and its earth wire can be used as an anti-static ground wire (but the neutral wire and the ground wire must not be mixed).
d. The cross-sectional area of the grounding trunk line should be no less than 100mm2; the cross-sectional area of the branch trunk line should be no less than 6mm2; the grounding wire of the equipment and workbench should be a multi-strand plastic coated wire with a cross-sectional area of not less than 1.25mm2, and the color of the grounding wire should be yellow-green. Appropriate.
E. The connection method of the grounding trunk line should be brazed.
F. The connection terminals of anti-static equipment should ensure reliable contact, easy to assemble and disassemble, and allow the use of various clip-on connectors, such as fish clips, plug sockets, etc. g. Workplaces with higher grounding resistance requirements should install grounding system monitoring and alarm devices, such as the SL-038A grounding system monitoring and alarming device produced by our company, which can monitor whether the ground wire is in good contact with the earth at any time.
3. Use anti-static products as ordinary products
Many companies treat anti-static products as ordinary products, thinking that the products can be used without deformation or breakage. In fact, this is a misunderstanding. For example, an anti-static wrist strap can only be used for a few months. After a period of use, the appearance may not be damaged. However, it is often found that the wrist strap is broken during testing.
