How to measure the resistance value of anti-static shoes
Anti-static shoes are more safety protective shoes used in industrial production. They play a very important role in production. Of course, it is determined by the resistance value of anti-static shoes. When purchasing anti-static shoes, the product description will indicate that the resistance value of the shoes is 10 ^ 6 ~ 10 ^ 9Ω, but how is this value measured? Today, the editor of Shandong Mei'an Clothing will show you how to measure the resistance value of anti-static shoes.
First of all, it is the preparation before measurement, including measuring instruments, samples of anti-static shoes, suitable measuring environment and so on. The requirement of the measuring instrument for anti-static shoes is to output a DC voltage of 100 ± 2V. The measurement result can be accurate to within 5%, and the energy consumed in the test sample of the anti-static shoes must not exceed 3W. Grade 2.5, the range should meet the measurement requirements. The inner electrode consists of steel balls with a diameter of 5mm. Before use, it needs to be anti-oxidized. The outer electrode is a copper plate. It must also be anti-oxidized before use.
Secondly, the sample used for measurement must be kept clean, dry and intact. After that, the conductive layer with an area of 180 * 40mm² should be pressed on the sole of the shoe, and dried under the specified conditions, and then placed in the specified environment for more than 24 hours; The measurement environment of electrostatic shoes requires a temperature of 20 ° C ± 2 ° C and a relative humidity of 30% ± 3%.
In addition, during the test, the steel ball should be filled in the sample shoe according to regulations, and then the test sample of the installed steel ball should be placed on the specified external electrode, and the specified DC power supply should be connected between the internal and external electrodes for 1 minute. , And then record the voltage and current values.