Kestrel
®
4500 Pocket Weather
®
Tracker
Some final notes - If you wish to know the actual or station pressure for your location (such as for
engine tuning), simply set the reference altitude on the BARO screen to “0”. In this case, the Kestrel
Meter will not make any adjustment and will display the measured value. (Engine tuning and ballistics
software sometimes refer to atmospheric or station pressure as “absolute pressure.” These applications
are concerned with the actual air density, as opposed to pressure gradients relating to weather, so
barometric pressure is less useful.)
Also, the above discussion applies to ALL pressure altimeters, including one you may have in a watch or
other device, but not to GPS altimeters, which use satellite triangulation to determine altitude. Note that
with present GPS technology, pressure altimeters remain more accurate for measuring altitude change.
This is why airplanes still rely on pressure altimeters, not GPS.
Finally, the DENSITY ALTITUDE screen is calculated from the absolute values of station pressure, relative
humidity and temperature, and is not affected by the reference values entered in the BARO and
ALTITUDE screens.
MAIN SETUP MENU
You can customize your Kestrel Meter in multiple ways. Press the button to access the Main Setup
Menu. Press the - button to select the highlighted setting. The Main Setup Menu contains: OFF, Memory
Options, Measurements, Graph Scale, Units, User Screens, System, Date & Time, Language and Restore.
Off
Press the then the button to turn the display off. Even when the Kestrel Meter’s display is turned
off, the unit will continue to automatically store data at the defined Store Rate. The battery life will be
decreased if data is stored frequently. The only way to completely shut off the unit is to remove the
batteries. Custom settings and data will be stored when the batteries are removed.
