Kestrel 2000 - Manual (Page 3)

Kestrel® 2000 Pocket Weather® Meter 5
Temperature - Instantaneous temperature of the thermistor, which is located at the end
of the long coiled leads in the open cavity below the impeller. The exposed thermistor will
respond quickly to changes in temperature when air flows past it. For fastest response, either
hold the unit into the wind or wave the unit side to side for 15 seconds. Readings should be
taken in the shade.
Wind Chill - Combination of wind speed and temperature, as defined by the US National
Weather Service. Wind chill is the effective temperature on a human or animal at low
temperatures due to wind speed. Wind chill readings will be the same as the temperature
readings above 45ºF or below 3 mph.
MAINTENANCE & TROUBLESHOOTING
Environmental
Every Kestrel Meter is fully waterproof and floats, and has passed mil-spec drop testing.
Storing Your Kestrel
Avoid storing your Kestrel where it will be exposed to temperatures below -30°C [-22°F] or
above 60° C [176° F] for extended periods of time. Doing so may cause permanent damage.
(Note that the inside of a car parked in the hot sun can reach very high temperatures.)
Use of the Lanyard and Cover
The cover can be captured on the lanyard to avoid loss. First, remove the cord poplock. Then
feed the lanyard end through the large opening in the over and out the slot. Replace the
poplock on the lanyard.
Replacing the Battery
When your display becomes dim or disappears, replace the
battery. Use a large coin to open the battery compartment. Use
only new CR2032 coin cell batteries (available where watch
batteries are sold). Wipe the battery clean of any fingerprints
and insert the positive (+) pole up, angling the battery
downward and pressing it firmly into place. When replacing the
battery door, be sure to keep the black rubber o-ring seated in
the groove on the case back.
Why does the Impeller Appear Imbalanced?
It is NORMAL for the impeller to oscillate as it comes to a stop. It is NOT imbalanced. Rather,
it contains a very small magnet that responds to the earth’s magnetic fields. This does not
affect the accuracy of the wind speed readings because the magnetic field applies both a
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 numerous 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 pivot bearings in the impeller.
Replacing the Battery