Electronic assembly workshop ESD shoes and ESD grounding shoelace test method
The electronic assembly workshop has ESD conductive floor glue, uses ESD special grounding shoelaces, and requires every operator to wear steel-toed safety shoes. The special grounding shoelace for ESD is made of #2048 plastic, which has an impedance of 106-108, which can reduce static electricity. Should I buy a new tester or new shoes?
First, make sure your tester is calibrated, if not, it needs to be calibrated. The standard for testing shoes is different from the grounding shoelace. The standard ESD S9.1-1995 uses a 100V impedance meter for impedances below 109. Most grounding shoelace testers use an open circuit voltage of 6-12V, which is much lower than that used for shoes. 100V voltage. If the material of the shoe itself conducts electricity at high voltages, either buy a higher voltage tester or reconsider the important factors in ESD control. Some foot ground (heel strap) testers are factory calibrated at 750k-100 M, others are only 10 M, some newer testers provide about 20-22V open circuit voltage, which may also have some effect. In addition, There are some ESD shoes that are used to test foot ground testers because they conduct electricity very easily at lower voltages (in the depletion range).