BS ISO 7216:2015 pdf download – Agricultural and forestry tractors — Measurement of noise emitted when in motion 1 Scope This International Standard specifies a method for measuring the A-weighted sound pressure level ofthe noise emitted by agricultural and forestry tractors while the vehicle is in motion. The conditions specified for the operation of the agricultural and forestry tractors during themeasurements are defined to provide a realistic and repeatable assessment of the maximum noiseemitted when it is in motion. This International Standard is applicable to agricultural and forestry tractors,ftted with elastic tyresor rubber tracks. lt is not applicable to special forestry machinery, for example, forwarders, skidders,etc., as defined inISO 6814 and agricultural and forestry tractors, fitted with steel tracks. NOTE The test method calls for an acoustical environment which can only be obtained in an extensive open space. Normative references The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application. For dated references,only the edition cited applies.For undatedreferences, the latest edition of the referenced document (including any amendments) applies. IEC 61672-1,Electroacoustics — Sound level meters IEC 60942,Electroacoustics — Sound calibrators ISO 6814:2009, Machinery for forestry — Mobile and self-propelled machinery —Terms, definitions andclassification 3Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 agricultural tractor self-propelled agricultural vehicle having at least two axles and wheels,or endless tracks, particularlydesigned to pull agricultural trailers and pull, push, carry and operate implements used for agriculturalwork (including forestry work), which may be provided with a detachable loading platform Note 1 to entry: The agricultural vehicle has a maximum design speed of not less than 6 km/h and may beequipped with one or more seats. [SOURCE: ISO 12934:2013,3.1] 4 Measurement units and tolerances The following units and tolerances apply to the maximum value measured: — rotational frequency (r/min) ± 0,5 % ; — time (s) ± 0,2 s ; — distance (m or mm) ± 0,5 % ; — force (N) ± 1,0 % ; — mass (kg) ± 0,5 % ; — atmospheric pressure (kPa) ± 0,2 kPa ; — tyre pressure (Pa) ± 5 % . 5 Instrumentation 5.1 A precision quality sound level meter shall be used meeting or exceeding the requirements of IEC 61672-1 for a class 1 instrument. If alternative measuring equipment is used, the tolerances shall not exceed those given in the relevant clauses...
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