ANSI ESD STM-97.2-2006 pdf download Floor Materials and Footwear – Voltage Measurement in Combination with a Person
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 stock or tube of approximately 2.5 cm (1 inch) diameter by 7.5 cm (3 inches) in length with a banana plug receptacie or screw connector attached to one end of the cylinder. A wrist strap may also be used.
5.1.2 Environmental Walk-In Test Chamber An enclosed walk-in chamber with appropriate controls and meters capable of controlling relative humidity to 12% relative humidity (RH) ( 3% RH) and temperature of 23。C (1 °。C). The humidity indicating instrumentation shall be accurate to 3% RH in the operational range.
5.1.3 Charged Plate Monitor A charged plate monitor or equivalent with input resistance of greater than 1.0 x 1014 ohms and capacitance less or equal to 20 pF capable of measuring voltages in the ranges of 10 to 5000 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 seconds.
5.1.5 Specimen Support Material for Floor Material
5.1.5.1 Support material shall be clean, smooth, and have a point-to-point resistance greater than 1.0 x 1011 when tested under the low humidity environmental conditions according to ANSI/ESD S7.1.
5.1.5.2 For testing of floor materials or mats, mount the floor material on nominal 6.3 mm (0.25 inch) tempered or standard hardboard according to Section 5.2.1. The hardboard must be 1 cm (0.5 inches) larger than the floor sample in all directions.
5.1.6 Specimen Support Material for Floor Finishes
5.1.6.1 Mount floor surface on nominal 6.3 mm (0.25 inch) hardboard according to Sections 5.1.5.1 and 5.2.1 before applying finish. Use conductive adhesive to fasten a minimum sized 5 x 15 x 0.25 mm (2 x 6 x 0.010 inch) metallic foil to make contact with the floor finish surface as a groundable point.
5.1.6.2 For testing of floor finishes, use the floor surface to which the finish would be applied. Coat a definite amount according to the manufacturer’s specification.