To determine whether the anti-static effect of anti-static plywood meets the standard, the following methods can be used:
Surface resistance test
-Using a surface resistance tester: This is the most direct method. Place the two electrodes of the tester on the surface of an anti-static electric board and perform the test according to the operating instructions of the instrument. The surface resistance of qualified anti-static electric boards should generally be between 10 ⁶ -10 ⁹ Ω. If the test results exceed this range, it may indicate that the anti-static effect is not up to standard.
-Testing frequency: It is best to conduct multiple tests at different locations, as there may be local differences in the resistance of the material surface. At the same time, considering the impact of usage environment and time, regular testing can be conducted, such as testing at the beginning of installation and after a period of use (such as one month, three months, etc.).
Static decay time test
-Principle and equipment: Electrostatic decay time refers to the time required for an electrostatic charge to decay from its initial value to a specified value (usually 10% of the initial value). Use an electrostatic decay tester to apply a certain amount of static charge to the surface of the anti-static electric board, and then record the time for the charge to decay to the specified value. Generally speaking, the static decay time of standard products should be within a few seconds, and the specific value depends on different industry standards and usage requirements.
-Comparison standard: Compare the static decay time obtained from the test with the requirements of relevant standards or product manuals. For example, in the electronics manufacturing industry, for some operating environments that are highly sensitive to static electricity, the required static decay time may be shorter.
Observe the actual usage situation
-Observation of static electricity phenomenon: Observe whether there is static electricity generated in the actual usage environment, such as dust adsorption, electric sparks, etc. If dust often adsorbs around the anti-static electric board, it may mean that its anti-static effect is poor. However, this method is more intuitive but relatively imprecise, as dust adsorption may also be affected by other factors such as environmental airflow.
-The impact on static sensitive equipment: If anti-static electric boards are used to place or protect static sensitive equipment, observe whether these devices are affected by static interference or damage. For example, in the electronic chip manufacturing workshop, if electric wood boards with substandard anti-static effects are used, it may cause the chips to be broken down by static electricity, thereby affecting product quality.
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