ANSI STM97.2 pdf free download
ANSI STM97.2 pdf free download.For the Protection of Electrostatic Discharge Susceptible Items Footwear/Flooring System一Voltage Measurement in Combination with a Person.
3.0 DEFINITIONS OF TERMS
The terms used in the body of this document are in accordance with the definitions found in ESD ADV1 .0, ESD Association’s Glossary of Terms available for complimentary download at www.esda.org. The following definitions are in addition to those found in ESD ADV 1.0, ESD Association’s Glossary of Terms:
Groundable point, floor material. A point on the floor material that accommodates an electrical connection from the floor material to an appropriate ground.
Hardboard (standard or tempered). Heavy sheet material of fibers matted and pressed or rolled to form a strong board. (Masonite, of the Masonite Corp., or the equivalent, is one of several commonly available board products that will serve the purpose.5)
Static control floor material. A permanently installed floor material such as tile, carpet, polymer, epoxy or sheet flooring that dissipates static charges by grounding personnel, equipment or other objects contacting the floor material or that controls the generation and accumulation of static charges associated with floor materials.
Static control floor finish. A non-permanent coating periodically applied to existing floor surfaces that dissipates static charges by grounding personnel, equipment or other objects contacting the floor finish or that controls the generation and accumulation of static charges associated with floor materials.
Static control floor mat. A movable section of material placed over existing flooring that dissipates static charges by grounding personnel, equipment or other objects contacting the mat or that controls the generation and accumulation of static charges associated with floor materials.
Static control footwear (shoes). Coverings for the human foot that have properties to control the accumulation of static charge when used in conjunction with a static control floor, floor finish or floor mat.
Static control footwear (other devices). Foot grounders, such as foot straps, toe grounders, booties or other electro-mechanical connectors (excluding shoes), which are connected to human feet are intended to control the generation and accumulation of static charge when used in conjunction with a static control floor, floor finish or floor mat.
5.0 TEST METHODS
This section describes the test methods for measuring voltage on a person in combination with
ESD footwear and flooring materials, both prior to and after installation.
5.1 Apparatus Requirements
5.1.1 Hand-Held Electrode
A stainless steel, brass or copper round or tubular stock, approximately 2.5 cm (1 inch) in
diameter x 7.5 cm (3 inches) or greater in length, with a banana plug receptacle or screw
connector attached to one end of the cylinder.
5.1.2 Environment
A low humidity environment shall be an environment of 12% ± 3% relative humidity and
23°C ± 3°C. Preconditioning of the footwear and flooring samples shall be a period of at least
72 hours.
The humidity indicating instrumentation shall be accurate to ± 3% RH in the operational range.
5.1.3 Voltage Measurement Apparatus
A charged plate monitor or equivalent with input resistance of greater than 1 .0 x 1014 ohms and capacitance less than or equal to 20 pF capable of measuring voltages in the ranges of 10 volts up to a minimum of 1000 volts with an accuracy of ± 10% (see ANSI/ESD STM3.1). The monitor shall have an analog or digital output to connect to a recording device.
5.1.4 Recording Device
A chart recorder, scope or data logger such as an analog to digital converter connected to a personal computer. The system time constant shall be not more than 0.2 second.ANSI STM97.2 pdf download.
