The impact sites are at any point on the area above the test line described in paragraph S6.2.3, and separated by a distance not less than one-sixth of the maximum circumference of the helmet in the test area.
means a test device contoured to the dimensions of one of the three headforms described in Table 2 and Figures 5 through 8 with surface markings indicating the locations of the basic, mid-sagittal, and reference planes. The adjustable portion of the retention system test device shall not move more than 1 inch (2.5 cm) measured between preliminary and test load positions.Rigid projections outside any helmet's shell shall be limited to those required for operation of essential accessories, and shall not protrude more than 0.20 inch (5 mm).S5.6 S5.6.1 On a label or labels separate from the certification label required by S5.6.2, each helmet shall be labeled permanently and legibly, in a manner such that the label(s) can be read easily without removing padding or any other permanent part, with the following: “Helmet can be seriously damaged by some common substances without damage being visible to the user.The weight of the supporting assembly is not less than 2.0 lbs. S7.1.8 The center of gravity of the test headform is located at the center of the mounting ball on the supporting assembly and lies within a cone with its axis vertical and forming a 10° included angle with the vertex at the point of impact.The center of gravity of the drop assembly lies within the rectangular volume bounded by x = −0.25 inch (−0.64 cm), x = 0.85 inch (2.16 cm), y = 0.25 inch (0.64 cm), and y = −0.25 inch (−0.64 cm) with the origin located at the center of gravity of the test headform.
S6.4.2 If during testing, as specified in S7.1.3 and S7.2.3, a helmet is returned to the conditioning environment before the time out of that environment exceeds 4 minutes, the helmet is kept in the environment for a minimum of 3 minutes before resumption of testing with that helmet.