Conditions of measurement. 2.1.2.1. During the test to determine the time t, the feed rate of the energy source shall be that obtained when the engine is running at the speed corresponding to its maximum power or at the speed allowed by the over-speed governor.
Conditions of measurement. 3.1.1. Temperature range: 10 °C to 30 °C
Conditions of measurement. 2.3.1. In all cases, the speed of the compressor shall be that obtained when the engine is running at the speed corresponding to its maximum power or at the speed allowed by the governor.
Conditions of measurement. 2.2.1. The speed of the vacuum source shall be:
Conditions of measurement. 6.2.1.1. The sound test of the exhaust silencing system and the exhaust replacement silencing system have to be executed with the same "normal" tyres, as defined in paragraph 2. of UN Regulation No. 117. The tests are not allowed to be done with "special use" tyres or "snow" tyres as defined in paragraph 2. of UN Regulation No. 117. Such tyres could increase the sound level of the vehicle or would have a masking effect on the sound reduction performance comparison. The tyres may be of used condition but shall satisfy legal requirements for in-traffic use.
Conditions of measurement. 2.1. The fuel shall be the reference fuel as specified in Annexes 10 and 10a to this Regulation.
Conditions of measurement. 6.2.1.1. The sound test of the exhaust silencing system and the exhaust replacement silencing system have to be executed with the same "normal" tyres, as 2 The distinguishing numbers of the Contracting Parties to the 1958 Agreement are reproduced in Annex 3 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), document ECE/TRANS/WP.29/78/Rev.6, Annex 3 - xxx.xxxxx.xxx/xxxxx/xxxx/xx00/xx00xxx/xx00xxx/xx00xxxxxxxxxxx.xxxx defined in paragraph 2. of UN Regulation No. 117. The tests are not allowed to be done with "special use" tyres or "snow" tyres as defined in paragraph 2. of UN Regulation No. 117. Such tyres could increase the sound level of the vehicle or would have a masking effect on the sound reduction performance comparison. The tyres may be of used condition but shall satisfy legal requirements for in-traffic use.
Conditions of measurement. 2.3.1. Condition of the motor cycle The vehicle transmission shall be in neutral position and the clutch engaged, or in parking position for automatic transmission, and the parking brake applied for safety, if equipped. The vehicle air conditioner, if equipped, shall be turned off. If the vehicle is fitted with fan(s) having an automatic actuating mechanism, this system shall not be interfered with during the sound pressure level measurements. The engine hood or compartment cover shall be closed. Before each series of measurements, the engine shall be brought to its normal operating temperature, as specified by the manufacturer. In case of a two-wheeled motor-driven vehicle having no neutral gear position, measurements shall be carried out with the rear wheel raised off the ground so that the wheel can rotate freely. If it is necessary to raise a two-wheeled vehicle off the ground to perform the test, the microphone measurement position shall be adjusted to achieve the specified distance from the reference point of the exhaust pipe; see Figure 1 for the location of the reference points.
Conditions of measurement. 2.1. Measurements shall be performed on unladen vehicles and, except in the case of non-separable vehicles, without trailer or semi-trailer, in a sufficiently silent and open area (ambient noise and wind noise at least 10 db(A) below the noise being measured). The above- mentioned area may take the form, for instance, of an open space of 50 m radius having a central part of at least 20 m radius, practically level, consisting of concrete, asphalt or similar material, and not covered with powdery snow, tall grass, loose soil or ashes.
Conditions of measurement. 1.3.1. Condition of the motorcycle During the measurements the motorcycle shall be in running order (including coolant, oils, fuel, tools, spare wheel and rider). Before the measurements are made the motorcycle shall be brought to the normal operating temperature. If the motorcycle is fitted with fans with an automatic actuating mechanism, this system shall not be interfered with during the sound measurements. For motorcycles having more than one driven wheel, only the drive provided for normal road operation may be used. Where a motorcycle is fitted with a sidecar, this must be removed for the purposes of the test.
