What are the wrong practices of anti-static measures---1
1. There is no anti-static product testing equipment (for supervision)
A common mistake is that many companies have purchased many 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 grounding method is not good (electrostatic grounding is the most affordable way of electrostatic discharge)
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 1.25mm2, and the color of the grounding wire should be yellow-green Appropriate.
e. The connection method of the grounding backbone should be brazed.
f. The connecting terminals of anti-static equipment should ensure reliable contact, easy to assemble and disassemble, and allow the use of various clip-type connectors, such as fish clips, plug sockets, etc. g. Workplaces with higher grounding resistance requirements should install a grounding system monitoring alarm, such as the SL-038A grounding system monitoring alarm 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 (the biggest mistake)
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, but it is often found that the wrist strap is broken during testing.
4. Do not pay attention to socks and insoles (do not have a deeper understanding of static electricity)
People usually wear socks or insoles when they wear anti-static shoes. People who are prone to sweating will also conduct static electricity because of these socks and insoles. However, if people who are not prone to sweaty feet wear some non-anti-static shoes With insoles, the socks and insoles cannot conduct static electricity, so the static electricity of the human body cannot be introduced into the earth through the shoes. Therefore, place a "human body comprehensive resistance tester" at the entrance of the computer room or factory building, such as the SL-033 human body comprehensive tester produced by our company, which can quickly and accurately detect those who wear unqualified anti-static shoes, socks and insoles . Workers are advised to wear anti-static slippers in the summer and not to wear zizi. In winter, they can wear cotton socks but not nylon socks.