15
15
Overwrite
(On/Off )
This setting only applies when the data
log is full. When On, oldest data point is
discarded to allow memory for the new data
point. When Off, new data points are not
saved.
Press
or
to toggle between
On and Off.
Man Store
(On/Off )
When On, data is stored when the
button is pressed. When off, the
button
is disabled.
Press
or
to toggle between
On and Off.
*When unit is off , data is NOT stored for 2 sec and 5 sec Store Rates.
Measurements
Measurement screens can be turned off , or “hidden” from the normal measurement navigation. For
example, if wind chill is not of interest, it can be hidden. Press the or
button to toggle between ON
and OFF for each individual measurement. Press the
or
button to highlight the desired measurement.
Press the
button to return to the Main Setup Menu. Even when measurements are hidden, the Kestrel
Meter will continue to log data for all measurements. If you wish to see the logged data for measurements
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regularly. If you encounter an elevation landmark, you can adjust the reference pressure until the altitude
matches the landmark elevation. This will correct the altitude for any pressure changes due to the weather.
(Or, you can obtain an updated reference pressure from the sources described above.)
Some fi nal 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 aff ected 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.
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Kestrel
®
4200 Pocket Air Flow
®
Tracker
Humidity Ratio
Temperature, Dewpoint, Wet
Bulb Temp, Wind Chill, & Heat
Index
Pressure
Altitude,
Density
Altitude
Gpp grains per pound
G/kg grams per kilogram
°C Celsius
°F Fahrenheit
InHg inches
mercury
HPa nectopascals
psi pounds per
square inch
mb milibar
m meters
ft feet
Units
The units of measure can be adjusted to best suit the application. The following units are available:
Air Velocity
Air Flow
Dimensions
m/s meters per second
km/h kilometers per hour
kt knots
mph miles per hour
ft/m feet per minute
Bft Beaufort
Cfm cubic feet per minute
M
3
/h cubic meters per hour
M
3
/m cubic meters per minute
M
3
/s cubic meters per second
L/s liters per second
Ft feet
Cm centimeters
M meters
In Inches
14
Kestrel
®
4200 Pocket Air Flow
®
Tracker
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 defi ned 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.
Memory Options
These settings control the data storage properties.
Setting
Description
Operation
Clear Log
(Go/Done)
All stored data is cleared. This will also clear
Min/Max/Avg data.
Press or to clear the log.
Reset MMA
(Go/Done)
All Min/Max/Avg data is cleared. Chart data
will remain intact.
Press or to clear the MMA.
Auto Store
(On/Off )
When On, data is automatically stored at
preset Store Rate. When Off , data is only
stored when manually captured with the
button.
Press or to toggle between
On and Off .
Store Rate*
(2 sec – 12 hr)
The frequency at which data sets are
automatically stored. (Battery life may be
shortened if data is stored frequently.)
Press
or
to increase or
decrease Store Rate frequency.