Shortridge Instruments Airdata ADM-870 - Recalibration and Repair Information; Air Balance Manuals and Training Programs

ADM-870 05/23/0839
mass flow, "velocity" readings at density conditions other than standard must be corrected for local air density
conditions if these results are to represent true air velocity.
Local density velocity readings taken with the ADM-870 AirData Multimeter may be compared with hot wire
anemometer readings if the hot wire readings are corrected for local air density conditions to obtain true air
velocity results.
The precise method for calculating local density corrected air velocity from measurements taken with a hot
wire anemometer requires the use of the following equation:
Where: P
b
= local barometric pressure (in Hg)
/ F = temperature of airstream