ANSI STM97.2-2016 pdf free download.Footwear/Flooring System – 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).
4.0 PERSONNEL SAFETY
THE PROCEDURES AND EQUIPMENT DESCRIBED IN THIS DOCUMENT MAY EXPOSE PERSONNEL TO HAZARDOUS ELECTRICAL CONDITIONS. USERS OF THIS DOCUMENT ARE RESPONSIBLE FOR SELECTING EQUIPMENT THAT COMPLIES WITH APPLICABLE LAWS, REGULATORY CODES AND BOTH EXTERNAL AND INTERNAL POLICY. USERS ARE CAUTIONED THAT THIS DOCUMENT CANNOT REPLACE OR SUPERSEDE ANY REQUIREMENTS FOR PERSONNEL SAFETY. GROUND FAULT CIRCUIT INTERRUPTERS (GFCI) AND OTHER SAFETY PROTECTION SHOULD BE CONSIDERED WHEREVER PERSONNEL MIGHT COME INTO CONTACT WITH ELECTRICAL SOURCES. ELECTRICAL HAZARD REDUCTION PRACTICES SHOULD BE EXERCISED AND PROPER GROUNDING INSTRUCTIONS FOR EQUIPMENT SHOULD BE FOLLOWED. THE RESISTANCE MEASUREMENTS OBTAINED THROUGH THE USE OF THIS TEST METHOD SHALL NOT BE USED TO DETERMINE THE RELATIVE SAFETY OF PERSONNEL EXPOSED TO HIGH AC OR DC VOLTAGES.
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 1 2% ± 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 1 0 1 4 ohms and capacitance less than or equal to 20 pF capable of measuring voltages in the ranges of 1 0 volts up to a minimum of 1 000 volts with an accuracy of ± 1 0% (see ANSI/ESD STM3.1 ). The monitor shall have an analog or digital output to connect to a recording device.
