Dd - Ff
Decay time: The time required for an electrostatic potential to be reduced to a given percentage (usually 10%) of its initial value. (See Static Decay Test.)
Dense Networked Office: Area within a building that uses LAN based networks in 8' x 8' furniture cubicles, or less.
Dielectric: An insulating material that can sustain an electric field with little current flow.
Dielectric strength: The maximum electric field that a dielectric can sustain.
Discharge Time: The time necessary for a voltage (due to an electrostatic charge) to decay from an initial value to some arbitrarily chosen final value.
Dissipative Tile: A floor tile material used for the mitigation of electrostatic discharge (ESD). Usually composed of carpet, synthetic rubber or vinyl composition.It is important to differentiate between the terms SDT and static dissipative. By definition, a static dissipative floor tile inherently meets the electrical properties of "static dissipative flooring" without the use of antistatic waxes, finishes and glazes. A static dissipative tile is not necessarily antistatic and should be carefully evaluated in applications where special controlled footwear will not be used. Static dissipative vinyl is a static generator in combination with people and standard footwear. Static dissipative rubber inhibits the generation of static in combination with people wearing standard footwear.
Electrical Resistance: The measure of a material's ability to conduct a charge to ground.
Electrification time: The time for the resistance measuring instrument to stabilize at the value of the upper resistance range verification fixture.
Electrostatic discharge (ESD): The rapid, spontaneous transfer of electrostatic charge induced by a high electrostatic field. Note: Usually, the charge flows through a spark between two bodies at different electrostatic potentials as they approach one another. Details of such processes, such as the rate of the charge transfer, are described in specific electrostatic discharge models.
Electrostatic Discharge Ground: The point, electrodes, bus bar, metal strips, or other system of conductors that form a path from a statically charged person or object to ground.
Electrostatic Discharge Sensitivity (ESDS): The ESD level that causes component failure. (Note: See also electrostatic discharge susceptibility.)
EMI: (Electromagnetic Interference) - the transmission of a rogue electrical signal, caused by ESD, and received by a computer or electrical device and has the potential to cause disruption and downtime. An example of EMI is the static interference you may hear over an automobile radio, caused by lightning, when you drive in the vicinity of an electrical storm.
EOS/ESD Association: (based in Rome, NY) - Four thousand members representing the largest trade association for the ESD issues. The association assists in writing and setting industry standards and test methodologies and publishing the latest research and technology on ESD.
ESD: The abbreviation for electrostatic discharge. In layman’s terms: an electrical event that takes place when two conductors with different electrical potential make contact. ESD events occur when people walk across various forms of flooring and then they touch or approach computers and sensitive electronic devices. ESD should not be identified with shocks or zaps. Although shocks and zaps are ESD events, they are the result of at least three thousand five hundred (3500) volt discharges. An ESD event as low as 20 volts can disrupt electronic components. Because of this extremely low voltage, the event can go completely undetected.
ESD Event (a static discharge or spark): ESD events range across a broad spectrum from microscopic discharges far below the threshold of human sensitivity to violent static shocks like the ones you may feel when you touch a metal door handle on a dry day. ESD events can cause damage to sensitive devices.
ESD Carpet Tile: Used to control the accumulation of electrostatic discharge on people, chairs and tables. A modular floor tile comprised of conductive carpet and a conductive thermoplastic backing. Usually manufactured using conductive fibers woven into the carpet face. A floor tile designed to provide an electrical path to ground for the dissipation of unwanted static electricity charges in applications where electronics are stored, manufactured, used or handled. An ESD grade flooring material will remain conductive at any relative humidity level. Not to be confused with computer grade or low kV carpet materials.
ESD Floors: This is a catch-all term for any type of floorcovering with antistatic or conductive properties. This description is usually used during the investigation phase of static control flooring materials. Referring to a conductive or antistatic flooring material as an ESD floor is not a sufficient reference for defining certifiable electrical properties. The proper way to specify a flooring material used in sensitive electronic environment requires stating the resistance to ground which is measured in ohms.
ESD protective: A property of materials capable of one or more of the following: preventing the generation of static electricity, dissipating electrostatic charges over its surface or volume, or providing shielding from ESD or electrostatic fields.
ESDS: Electrostatic Discharge Susceptible. (See Electrostatic Discharge Susceptible and Electrostatic Discharge Sensitivity.)
ESD S 7.1: The ESD Association Standard 7.1 - "Resistance Characteristics of Materials." A generally accepted test method used to determine conductivity of flooring and other material surfaces.
Excessively Porous Subfloor: Any subfloor surface that has an extremely rough surface, such as concrete that has recently been shot-blasted (blastracked), any subflooring that has leftover residue of old latex adhesive, recently skimcoated, rough wood subflooring, etc. Such subfloor conditions can create bonding issues and lead to the necessity of using sealers or a greater amount of adhesive to properly adhere floorcoverings.
Floor Contacting Surface (FCS): That part of the foot grounder that makes electrical contact to the grounding surface.
Flooring/Foot Grounder System Resistance: The total resistance of the foot grounder, when worn by the person, while standing on a static control floor.
Foot Grounder: Personnel grounding device worn on the shoe. Foot Grounder System A foot grounder properly worn by a person where the electrical path includes the person and the foot grounder.
Foot Grounder System Resistance: The measure of the total resistance of the foot grounder when worn by the person standing on a stainless steel plate.
A-C | D-F | G-K | L-R | S-Z
