Alnor Velometer 6000 Serie Mode D'emploi page 19
Le vélomètre tsi permet de lire directement les vitesses de mouvements de l'air dans les conduits d'air chaud ou d'aération ou dans les espaces ouverts tels que grilles, diffuseurs, hottes, réservoirs ventilés, etc. on peut aussi y mesurer les pressions s
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In round ducts, take velocity readings at the center of equal concentric
areas; take at least 20 readings along two diameters. In square or
rectangular ducts, take a minimum of 16 and a maximum of 64 readings
at centers of equal areas. Calculate the average of all readings.
For maximum accuracy, observe the following precautions:
1. Perform the traverse in a section of the duct where the air stream is
as uniform as practical. This is generally a location of eight or more
duct diameters of straight duct upstream from the traverse location.
2. Do not take the traverse near a duct elbow, transition or obstruction.
3. Make a complete, careful and accurate traverse and record the results
on a worksheet.
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