General conditions of test. 3.1.1.1. At least two measurements shall be made on each side of the motor cycle. Preliminary measurements may be made for adjustment purposes, but shall be disregarded. 3.1.1.2. The microphone shall be situated 1.2 m ± 0.1 m above ground level at a distance of 7.5 m ± 0.2 m from the path of the motor cycle’s centre line, measured along the perpendicular (PP’) to that line (see Appendix, Figure 1). 3.1.1.3. Two lines, AA’ and BB’, parallel to line PP’ and situated respectively 10 m forward and 10 m rearward of that line shall be marked out on the test runway. For all measurements the motor cycle shall be driven in a straight line over the acceleration section in such a way that the longitudinal median plane of the motor cycle is as close as possible to line CC’. The motor cycle shall approach line AA’ at a steady speed as specified below. When the front of the motor cycle reaches the line AA’, the throttle shall be fully opened as rapidly as practicable and held in the fully-opened position until the rear of the motor cycle crosses the line BB’; the throttle shall then be closed again as rapidly as possible. 3.1.1.4. The maximum value recorded at each measurement shall constitute the result of the measurement. The measurements shall be considered valid if the difference between the two consecutive measurements on the same side of the vehicle is not more than 2 dB(A).
Appears in 2 contracts
Sources: Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment, Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment