Electrostatic testing instrument is the baton of electrostatic protection
I often hear some OEM companies come to consult the instrument and say that our company is a OEM for a large company. What brand and model do they want us to use to detect static electricity indicators? Why do large manufacturers specifically require a certain model, that is, Because the accuracy of some brand instruments is still trustworthy, the direction of rectification after the measurement results are out is clear, and it is clear at a glance whether the electrostatic protection is in place.
The anti-static products produced must be tested for a number of static indicators. In order to ensure product quality in the electronic processing industry, electrostatic protection must also be implemented according to the standards required by the national standard. The anti-static technical indicators in electronic product manufacturing are not only used for The resistance value of the electrostatic product has requirements, and there is also a measure of how high the static voltage generated during the circulation of the product. The surface resistance, volume resistance, friction voltage, grounding system resistance, time and balance required to eliminate static equipment are all Strict requirements, that index does not meet the standard, and the electrostatic protection is all zero. From this point, it can be proved how important the detection index is. Everyone knows that any technical index measured is what should guide us to do? Or how to improve product quality or working environment, so as to meet the requirements of electrostatic standards.
Reference value of anti-static technology index of electronic manufacturing industry:
1. The ground resistance of the anti-static ground electrode is less than 10Ω.
2. Anti-static ground or floor mat: surface resistance value 105-109Ω, friction voltage <100V.
3. Anti-static wall: resistance value 5×104-109Ω.
4. Anti-static workbench pad: surface resistance value 105-109Ω; friction voltage <100V; ground resistance 105-109Ω.
5. The anti-static work chair faces the caster resistance 105-109Ω.
6. Anti-static work clothes, caps, gloves friction voltage <300V; sole friction voltage <100V. The surface resistance value is 105-109Ω.
7. The resistance of the anti-static wrist strap connection cable is 1MΩ; when wearing the wrist strap, the system resistance is 750KΩ-1O.5MΩ. The resistance of the heel strap (shoe bundle) system is 105-108Ω.
8. The resistance of the logistics vehicle to the wheel system is 105-109Ω.
9. The material resistance of the material transfer box, turnover box, PCB rack, etc. is 103-109Ω, and the friction voltage is less than 100V.
10. The friction voltage of packaging bags and boxes is less than 100V.
11. Human body comprehensive resistance 105-109Ω.
Based on the parameters required by the above electrostatic standards, these are all measured by all electrostatic detection instruments. If the accuracy of the instrument is not enough, it will affect the measured data. Especially for customers who have high requirements for electrostatic protection, they will Evaluate the production environment and the static products on the production line. If it fails to meet the requirements, rectify or replace the static consumables.