braking and an accelerating force which cancel each other. The impeller has been calibrated
to provide wind speed readings accurate to within at least ± 3%.
High Speed Use
After several hours of sustained operation over 25 M/S (~49 KT, 90 KM/H, 56 MPH or
4,923 FPM), the Kestrel will lose some accuracy due to wear of the sapphire bearings in
the impeller.
Replacing the Impeller
You may recalibrate the wind speed readings by replacing
the impeller. Press FIRMLY on the sides of the black
impeller housing with your thumbs to remove the entire
assembly. When inserting the new impeller, be sure the
arrow is facing the display side of the unit, and is aligned
with the top of the meter. Press on the sides of the housing
rather than the center.
Replacing the Impeller
Kestrel® 2000 Pocket Weather® Meter
