Anti-Static ESD Shoes | Electric Static Dissipative Footwear
ESD shoes, have an electrostatically dissipative conductive shoe sole, popularly known as antistatic shoes (which is not the same, incorrectly). Safety Shoes are classed as ESD safe shoes when the resistance value of the system person-shoe-floor is below 3,5 x 10^7 resp. 35 MOhm according to EN 61340-5-1.
Through the conductive sole of the ESD safe shoes, static charges can be derived, only in combination with an ESD conductive floor, to ground and is prevented in this way, ESD damages to electrostatically sensitive components.
INTERNATIONAL STANDARD-ESD IEC 61340-5-1 Edition 1.0 2007-08
IEC 61340-4-3, Electrostatics – Part 4-3: Standard test methods for specific applications : Footwear
IEC 61340-4-5, Electrostatics – Part 4-5: Standard test methods for specific applications : Methods for characterizing the electrostatic protection of footwear and flooring in combination with a person.
5.3.2 Personnel grounding
For standing operations, personnel can be grounded via a wrist strap system or by a flooringfootwear system. When a flooring-footwear system is used, either of the two following conditions shall be met:
the total resistance of the system (from the person, through the footwear and flooring to equipment ground) shall be less than 3,5 × 107 ;
the maximum body voltage generation shall be less than 100 V and the total resistance of the system shall be less than 1 x109 .
A.2 Measurement procedure for ESD-footwear testing
The operator shall stand with one foot on the conductive footwear electrode. The hand contact plate shall be pressed to verify that the person/footwear system resistance is within acceptable parameters (see Figure A.2). The test shall be repeated for the other foot. The test apparatus can be an integrated, commercially available tester or other instrumentation that is capable of measuring resistance from 5,0x10^4 Ω to at least 1,0x10^8 Ω. The tester open-circuit voltage is typically between 9 V d.c.and 100 V d.c.