1. Environmental impact: the influence of temperature and humidity
When the temperature and humidity are gradually increased, the measured epoxy antistatic floor dielectric resistance will decrease; the surface resistance is sensitive to humidity, and the volume resistance is sensitive to temperature. When the ambient temperature increases, the surface of the epoxy antistatic floor is easily adsorbed to form a water film, which causes the surface leakage to increase. If the material is hygroscopic, the electroconductive flow is greatly increased. As the temperature rises, the adsorption current and the electrical conductivity of the floor dielectric material increase accordingly. For example, when the dielectric material has a resistance value of only 1/10 of the resistance value at 20 ° C and a relative humidity of 10%, the resistance value of the dielectric material for the moisture absorption is reduced by about one order of magnitude. Therefore, we must pay attention to changes in temperature and humidity during testing.
2, the impact of the use of measuring tools: the impact of electrode shape size and weight
According to the previous experience, from the theoretical and practical aspects, the electrode contact surface is large, the weight is heavy, the measured resistance value is low, the electrode contact surface is small, the weight is light, and the measured resistance value is high. The main function of anti-static epoxy ground engineering is to ensure the elimination of static electricity in the human body. Therefore, the size and weight of the electrode should simulate the size of the person's shoes, feet and the weight of the human body.
Effect of using the operating method: the effect of test voltage and reading time
The resistance value of the antistatic epoxy floor varies with the magnitude of the test voltage and the length of time during which the voltage is applied. Generally, at normal temperature, when the voltage is low, the electric conduction current increases linearly with the applied voltage. When the voltage exceeds a certain value, the ionization activity is intensified due to the increase in the free current, and the current growth is much faster than the voltage increase. The higher the test voltage, the lower the measured resistance value.
The normal anti-static epoxy ground dielectric material test voltage reaches a smooth reading time, the recommended reading time for the system resistance (about >1010Ω) may not be enough, the system resistance is small (<106Ω) 5 seconds reading time There is more than enough time. It is not too long to consider reading data. Otherwise, the field test takes more points, takes too long, and the work efficiency is low. Considering that the reading time is too short, the operation takes time is too late, and the instrument also has response time. . Weifang Epoxy Flooring Company Tip: Try to complete the measurement work in the appropriate time during the measurement to avoid inaccurate data caused by operational errors.
