Document ID: chunk:federal_register_of_legislation:F2010C00408:body:0:p26
Version: federal_register_of_legislation:F2010C00408
Segment Type: other
Provision Reference: 
Character Range: 72210–74938

referred to in this Regulation.

       4. PROCEDURE FOR "H" POINT AND ACTUAL TORSO ANGLE DETERMINATION

       4.1. The vehicle shall be preconditioned at the manufacturer's discretion, at a temperature of 20  10 C to ensure that the seat material reached room temperature.  If the seat to be checked has never been sat upon, a 70 to 80 kg person or device shall sit on the seat twice for one minute to flex the cushion and back.  At the manufacturer's request, all seat assemblies shall remain unloaded for a minimum period of 30 min. prior to installation of the 3-D H machine.

       4.2. The vehicle shall be at the measuring attitude defined in paragraph 2.11. above.

       4.3. The seat, if it is adjustable, shall be adjusted first to the rearmost normal driving or riding position, as indicated by the vehicle manufacturer, taking into consideration only the longitudinal adjustment of the seat, excluding seat travel used for purposes other than normal driving or riding positions.  Where other modes of seat adjustment exist (vertical, angular, seat‑back, etc.) these will then be adjusted to the position specified by the vehicle manufacturer.  For suspension seats, the vertical position shall be rigidly fixed corresponding to a normal driving position as specified by the manufacturer.

       4.4. The area of the seating position contacted by the 3-D H machine shall be covered by a muslin cotton, of sufficient size and appropriate texture, described as a plain cotton fabric having 18.9 threads per cm and weighing 0.228 kg/m or knitted or non‑woven fabric having equivalent characteristics.  If test is run on a seat outside the vehicle, the floor on which the seat is placed shall have the same essential characteristics [2/] as the floor of the vehicle in which the seat is intended to be used.

       4.5. Place the seat and back assembly of the 3-D H machine so that the centreplane of the occupant (C/LO) coincides with the centreplane of the 3-D H machine.  At the manufacturer's request, the 3-D H machine may be moved inboard with respect to the C/LO if the 3-D H machine is located so far outboard that the seat edge will not permit levelling of the 3-D H machine.

       4.6. Attach the foot and lower leg assemblies to the seat pan assembly, either individually or by using the T-bar and lower leg assembly.  A line through the "H" point sight buttons shall be parallel to the ground and perpendicular to the longitudinal centreplane of the seat.

       4.7. Adjust the feet and leg positions of the 3-D H machine as follows:

       4.7.1. Designated seating position:  driver and outside front passenger

       4.7.1.1. Both feet and leg assemblies shall be moved forward in such a way