Weak current College】 【industry how to prevent electrostatic?】.

<br> <br> Electrostatic hazard is now more and more manufacturers have begun to implement various degrees of antistatic measures and projects. But be aware that effective ESD projects according to different enterprises and different realities of a job object, develop appropriate countermeasures. Antistatic .measures should be a system, comprehensive, otherwise, you can get half or even destructive reaction. Here we talk about workplace specific static method. <br> <br> «Ò» ¡ .¢ anti-static work area venues <br> 1, surface material: should choose from electrostatic conductor material composition of the ground, such as anti-static floor or in the General ground covered fortification electrostatic mats and effective grounding. Prohibition of direct use of .the wooden floor or laying of wool, hemp, chemical fiber rug and ordinary floor. <br> <br> 2. ground: a, antistatic system must have an independent and reliable grounding device, grounding resistance should normally be less than 10 Ω, .embedding and detecting methods should be consistent with the requirements of GBJ97. B, antistatic ground shall be connected to the power line zero shall be share with lightning ground wire. C, use three-phase power supply, 5-wire, its Earth line can .be used as anti-static grounding wire (but zero line, the ground shall not be mixed). D, then the landlord trunk sectional area should be not less than 100mm2; count trunk sectional area should be not less than 6mm2; equipment and working .of grounding line should use the cross-sectional area of not less than the number of shares deposited 1.25mm2 plastic wire, grounding line color to yellow-green line. E, then the host route for the connection should be used for brazing. F, .antistatic device connection terminals should ensure access reliable, easy Assembly and disassembly, allows various clips-connector, such as e-fish, plugs, etc. G, grounding resistance values called higher workplace should ground system monitoring alarm, may at any time contact with .mother Earth monitoring ground is good. <br> <br> 3, ceiling materials: should use anti-static, under normal circumstances to allow the use of gypsum board products, the prohibition of the use of ordinary plastic products. <br> < .br> 4, wall fabrics: should use anti-static wallpaper, under normal circumstances to allow the use of Lime plaster paint or paint the walls, the prohibition of the use of ordinary wallpaper and plastic wallpaper. <br> <br> 5, .humidity control: a, anti-static work of the relative humidity below 50%. B, without the harmful effects of the product, allows the use of humidification devices spray agents or water in order to increase the humidity. C, computer room humidity should .be consistent with the relevant provisions in GB2887, similar room should also comply with this requirement. <br> <br> 6. regional boundaries anti-static work area should be marked regional boundaries, and hang the obvious warning signs, warning signs should be .consistent with the provisions of that workspace GJB1649 entrances should configure ionization air bath equipment. <br> <br> 7, static power: anti-static work area, the prohibition of the use and contact easy to produce products of electrostatic charge. If the .table surface of paint or varnish surfaces, ordinary plastic veneer, vinyl and plastic resin surface flooring, floor, and General Polish wood floor. Ordinary vinyl clothes, hats, shoes, ordinary polyester, synthetic fibers and nylon fabric, plastic and rubber soled shoes operate .tools and equipment, ordinary plastic box, rack, bottle, spare supplies and paper products, ordinary foam and General mobile tools, compressors, injection equipment, evaporation equipment <br> <br> Second, the production site of anti-static product application and .management of <br> 1. grounding <br> Grounding is some antistatic product, or other device connected to a ground wire. Using the methods established buried ground "independent" of the Earth. The Earth and Earth resistance between the "10 Ω, .role is a relief on the conductor may charge for the agglomeration of conductors of accumulation of static electricity (such as the human body) is typically used to import the grounding. <br> Grounded in the following ways: <br> ① the human body .through the wrist strap grounding. <br> ② the human body through the anti-static shoes (or shoelaces) and grounded anti-static floor. <br> ③ work surface to ground. <br> ④ test instruments, tools, and soldering .iron grounding clamp. <br> ⑤ anti-static floor mat grounding. <br> ⑥ anti-static transporter, box, rack grounding as possible. <br> ⑦ anti-static Chair grounding. <br> <br> 2, antistatic .security working table: ① from Workbench, anti-static mat, wrist strap connector and grounding, etc. When necessary, it should also be equipped with anti-static devices, such as the ion fan. ② antistatic mat on two or more wristband connectors ., one for the operator is used, one for technical personnel, inspectors. ③ anti static security table does not allow stacking of plastic boxes, rubber, cardboard, glass, and so easy to produce static odds and ends, the information should be put into .drawings anti-static satchel. <br> <br> 3. static elimination device: easy to produce static product Assembly bench should put an ion fan, ion fan blowing on a product at any time can be generated quickly eliminate static electricity. <br .> <br> 4, anti-static wrist strap: direct contact with the staff of electrostatic sensitive devices must take anti-static wrist strap, wrist strap and human skin should have good contact, wrist strap system-to-ground resistance values should be .750 K Ω Ω-10.5 M. Anti-static wrist strap should always use the wrist strap tester for damage. There are conditions or require higher levels of the company it is best to use wrist band Analyzer, because online monitor used with the handles wristband .and connect the ground wire. It can readily detect an anti-static wrist strap damage or whether to wear good workers. <br> <br> 5, anti-static clothing: enter the anti-static work of the staff and contacts of electrostatic .sensitive devices should wear anti-static overalls, especially in the relative humidity is less than 50% of the dry environment (such as the winter) should comply with the uniform fabric-national standards. <br> <br> 6, anti-static .shoes: enter the anti-static work of the personnel should be anti-static shoes. Wear ordinary shoes personnel should use conductive shoes beam, anti-static shoes or heel belt. Anti-static shoes to use the human Tester often detect its anti- .static properties. <br> <br> 7, anti-static socks: many companies on the anti-static socks don't pay attention to, in fact, this is not right. When it is best to wear static shoes wear static socks .without anti-static socks can wear cottonMei, but shouldn't be wearing nylon, nylon mei mei conductivity is very poor, prevents static electricity import to anti-static shoes, sometimes with the human Tester measuring a double qualified anti-static shoes found resistance .was too high, it is because the wearing of nylon mei. <br> <br> 8, antistatic: production locations of components containing material bag, Tote, PCB and unloading racks, etc. should be provided with protective effect of static electricity, .do not allow the use of metal and ordinary containers and, if necessary, parts of the container should be ground. <br> <br> 9. production line of conveyor belts and driving shaft, should be fitted with anti-static grounding of brush .and strut. On the conveyor belt surface can use static elimination device. <br> <br> 10, production establishments use assembly fixtures, detecting jigs, welding tools, instruments, etc., should set a good grounding line. <br> < .br> 11, human Tester: the production site should be installed at the entrance of the human tester, each entry in the field of personnel should be anti-static test, qualified rear to get into the scene. <br> <br> < .br> <br> <br> <br>.