Temperature measurements. Measurements of air as well as test surface temperature are mandatory. The temperature measuring devices shall be accurate within ±1 °C. 1.3.1. Air temperature The temperature sensor is to be positioned in an unobstructed location close to the microphone in such a way that it is exposed to the airflow and protected from direct solar radiation. The latter may be achieved by any shading screen or similar device. The sensor should be positioned at a height of 1.2 ± 0.1 m above the test surface level, to minimize the influence of the test surface thermal radiation at low airflows.
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Sources: Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles, Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles
Temperature measurements. Measurements of air as well as test surface temperature are mandatory. The temperature measuring devices shall be accurate within ±1 ∀ 1 °C.
1.3.1. Air temperature The temperature sensor is to be positioned in an unobstructed location close to the microphone in such a way that it is exposed to the airflow and protected from direct solar radiation. The latter may be achieved by any shading screen or similar device. The sensor should be positioned at a height of 1.2 ± ∀ 0.1 m above the test surface level, to minimize the influence of the test surface thermal radiation at low airflows.
Appears in 1 contract
Sources: Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles