Basic principles of electrostatic protection
a, inhibit the accumulation of static charge;
b. Quickly, safely and effectively eliminate the static charge that has been generated.
Second, anti-static work area venue
1. Ground material
a. It is forbidden to directly use wooden floors or lay wool, linen, chemical fiber carpets and ordinary floor leather.
b. The ground made of electrostatic conductor material, such as anti-static raised floor or
Place an anti-static mat on the ground and connect it to the ground.
c. Allow the use of specially treated terrazzo floors, such as laying ground wire and carburizing beforehand.
Or spray antistatic agents on the ground.
2, ground
a. The anti-static system must have an independent and reliable grounding device. The grounding resistance should be less than 10Ω. The embedding and testing methods should meet the requirements of GBJ 97.
b. The anti-static ground wire shall not be connected to the power supply neutral line and shall not be shared with the lightning protection ground wire.
c. Use three-phase five-wire system to supply power, and its ground wire can be used as anti-static ground wire (but the neutral wire and ground wire must not be mixed).
d. The cross-sectional area of the grounding main line shall not be less than 100mm2; the cross-sectional area of the trunk line shall be not less than 6mm2; the grounding line of equipment and workbench shall 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 shall be yellow-green It is appropriate.
e. The connection method of the grounding main line should be brazed.
f. Anti-static equipment connection terminals should ensure reliable contact, easy to install and disassemble, and allow the use of various clip-on connectors, such as squid clips and plug sockets.
3, ceiling materials, ceiling materials should use anti-static material products, under normal circumstances, the use of gypsum board products, the use of ordinary plastic products is prohibited.
4, wall fabric
Anti-static wallpaper should be used for wall fabrics. Gypsum paint or lime paint wall is generally allowed. It is forbidden to use ordinary wallpaper and plastic wallpaper.
5, humidity control
a. The relative humidity of the anti-static working area should be no less than 50%.
b. Allow the use of humidification equipment to spray the preparation or water to increase the ambient humidity without adversely affecting the product.
c. The humidity of the computer room should comply with the relevant regulations in GB 2887, and similar computer rooms should also comply with this regulation.
6, regional boundaries
The anti-static work area shall indicate the boundary of the area, and the warning signs shall be hoisted at obvious places. The warning signs shall comply with the provisions of GJB1649, and the ionized air air bath equipment shall be arranged at the entrance of the work area.
7. Charge source It is forbidden to use and contact the charge source which is easy to generate static charge in the anti-static work area (see below).
Charge source: workbench surface, paint or varnish surface, ordinary plastic veneer, ordinary vinyl and resin surface floor plastic and ordinary floor leather, polished waxed wood floor. Ordinary vinyl overalls, caps, shoes, ordinary polyester, synthetic fiber and nylon fabrics, plastic and ordinary rubber soles, operating tools and equipment. Ordinary plastic boxes, racks, bottles, trays and paper products, ordinary foam and general mobile tools, compression Machine, injection equipment, evaporation equipment, etc.