ANSI STM97.2-2016 pdf free download – Footwear/Flooring System – Voltage Measurement in Combination with a Person.
5.2 Product Qualification Testing5.2.1 Floor Specimen Preparation
5.2.1.1 The preferred size of specimen shall be 91 cm x 91 cm (36 inches x 36 inches), although122cm x 122 cm (48 inches x 48 inches) may be used. In the case of the larger sample,the6.3 mm (0.25 inch) hardboard may have to be backed by another nominal 6.3 mm (0.25 inch)thick plywood or hardboard for strength.
5.2.1.2 Mount specimen on support material. Use manufacturer’s recommended procedures.
5.2.1.3 Each floor specimen shall have two ground connections that simulate end use groundingmethods. Unless the manufacturer’s installation instructions require otherwise,the groundconnection shall not extend more than 7.5 cm (3 inches) into the specimen.
5.2.2 Pre-Conditioning
5.2.2.1 Cleaning of Specimens
5.2.2.1.1 Floor Mats or Other Hard Surface Materials and Footwear
Clean twice following manufacturer’s recommendations or clean with a minimum 70%isopropanol-water solution using a clean, low-linting cloth.
5.2.2.1.2 Textile Floor Materials
To remove residual,non-permanentsubstances,clean according to manufacturer’srecommendations. ln the absence of such recommendations，clean with standard hot waterextraction procedures, such as lICUC soo1 or AATCC-171.
5.2.2.1.3 Floor Finishes
Remove any surface contamination by wiping with a clean, dry, low-linting cloth.
5.2.2.2 Environmental Conditioning
After cleaning specimens, place floor material and footwear in a low humidity environment set torelative humidity 12%±3% RH and 23C±3°C and condition the material for 72 hours minimum.NOTE: Samples must not be removed from this environment until all testing has been completed.
5.2.3 Test Procedures for Voltage Measurement
5.2.3.1 Place conditioned floor specimen on floor of test chamber,maintaining a distance of atleast 61 cm( feet) between walls and all sides of the sample.
5.2.3.2 Connect either groundable points “A” or “B” of the flooring specimen to ground (Figures 1and 2).
5.2.3.3 Connect voltage measurement apparatus to recording device.
5.2.3.4 Connect hand-held electrode to the voltage measurement apparatus.
5.2.3.5 Wear static control footwear under test (shoes or other devices) on both feet for10 minutes. Stand on the floor specimen with the left foot at position 5 and the right foot atposition 6 (see Figure 1).See Annex A for alternate walking methods.
5.2.3.6 Hold hand-held electrode.
5.2.3.7 Before starting each test, touch ground to remove any charge on your body and check to
make sure the instrumentation is also zeroed.
5.2.3.8 Walk on the floor specimen using the walking pattern. With each step, raise foot approximately 7.6 cm (3 inches) from the floor surface. Attempt to maintain feet parallel to floor during test. Do not scuff or drag feet during the test. The pace should be greater than one step per second. Pause for two seconds between each six step test cycles. A minimum of ten test cycles must be performed.
5.2.3.9 Continue walking on the floor specimen until the body voltage recorded on the recording device reaches equilibrium. Use appropriate scales on the charged plate monitor and recording device for optimum resolution.
5.2.3.1 0 Perform three tests per sample.
5.2.3.1 1 Record all data and the test conditions.
5.2.3.1 2 At a minimum, report the nine highest voltages; that is, the three highest voltages for each of the three tests regardless of polarity. See Annex B for sample test records.
5.2.3.1 3 Repeat testing at other environmental conditions as required for specific applications.ANSI STM97.2 pdf download.