Introduction to knowledge about friction voltage test
With the development of technology and industry, the awareness of static electricity in various industries is gradually becoming stricter. Anti-static products can effectively discharge the static electricity of the human body or neutralize the static charge to effectively prevent the harm caused by electrostatic discharge. Before purchasing general anti-static products, customers will require anti-static product manufacturers to issue a third-party test report.
Friction generates static electricity. Static electricity is a static charge. Friction can generate static electricity. Static electricity occurs all year round. In a dry environment in winter, static electricity is more likely to occur. In life, static electricity is widespread. To put it in detail, in the winter when the air is relatively dry, when the charge is not neutralized or discharged in time, it is easy to accumulate on the object, then there is a large voltage between the object and the ground. For an electrostatic object, the huge potential difference will break through the air gap. The human body connects a path between the object and the ground like a wire, and instantly discharges the ground violently.
Typical friction voltage test:
First, the object repeated friction test: A, the predetermined speed, direction, pressure and friction time; B, the actual material may be used as the test material;
Second, the object sliding friction test: A, usually static electricity and static voltage are tested; B, test different sliding conditions (such as front sliding and back sliding); C, actual, especially the maximum sliding distance; D, fixed Slip angle
Third, the rotational friction of the film material
Static electricity can be maintained for a certain period of time so that data can be read. The precautions for the friction voltage test are as follows:
1. The instrument must be correctly calibrated and zeroed;
2. Correct grounding;
3. The correct distance between the electrode and the measuring surface;
4. The human body is grounded and discharged when used by the operator;
5. The surrounding environment of the measured object, measurement activities will affect the measurement results.
6. Ensure that the two measured objects and the surrounding environment are not charged before the test;
7. The friction process is not affected by other external objects;
8. Picking up tools and workbench does not affect the static level of the test.