Desco 17250 is a foot ground, heel, non-marring, no resistor.
This foot grounder provides a continuous ground path between an operator and a properly grounded ESD protected floor. These foot grounders are designed for use on standard shoes. They can be easily adjusted to fit the individual wearer. These foot grounders are made from non-marring three layer yellow reversible static dissipative rubber with a textured grain black conductive inner layer. This unit includes a blue tab with carbon suffused fibers and a hook and loop fastening system for quick and easy fastening and removal. Full elastic strap provides maximum "flexing" comfort. The product has been tested to ESD STM 97.2 - Floor Materials and Footwear Voltage Measurement in Combination with a Person. It is a suitable ESD footwear component in Flooring - footwear system when used as the primary grounding method ( < 3.5 x to^7 ohms per ESD STM 97.1 floor materials and footwear- resistance measurement in combination with a person)
Key:
A. 0.060 inch thick non-marring, solid, three layer, rubber material. Three layers consist of a yellow dissipative outer layer with a textured grain, black conductive inner layer, and a yellow dissipative outer layer. Will not mar floors or shoes with black marks.
B. Nylon, blue ribbon, with 8 conductive threads, reversible, may be positioned on either side of foot.
C. 3/4 inch wide blue non-elastic hook material
D. 3/4 inch wide blue stretch loop material, for quick and easy attachment to foot
For this item with a 1 megohm resistor see: Desco 17252
Per ESD SP9.2 APPENDIX B -Foot Grounder Usage Guidance “Compliance verification should be performed prior to each use (daily, shift change, etc.). The accumulation of insulative materials may increase the foot grounder system resistance. If foot grounders are worn outside the ESD protected area testing for functionality before reentry to the ESD protected area should be considered.”
Per ANSI/ESD S20.20 Paragraph 6.2.2.2 Personnel Grounding Guidance, “ESD protective flooring, used with approved footwear, may be used as an alternative to the wrist strap system for standing operations.”
ESD Handbook TR 20.20 paragraph 5.2.3 “If the contact area between the bottom of the foot and the floor is not continuous, charge generation may occur especially when a person is walking. Heel straps must be worn on both feet to minimize the amount of time that the body of the person is isolated from ground while walking.”
Suitable for ESD footwear component in Flooring - Footwear System personnel grounding method (<3.5 x 10E7 ohms per ESD STM 97.1).
Suitable for ESD footwear component in flooring - Footwear System personnel grounding method (<100 volts per ESD STM 97.2).
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