Kestrel 4500NV Applied Ballistics Meter - Manual (Page 8)

8
Measuring Direction
The Kestrel 4500’s digital compass must be vertical to
achieve accurate readings. Keep the unit positioned as
close to vertical as possible when using any compass-
related feature. After opening the battery door, you
must re-run the calibration routine or readings will not
register. For maximum accuracy, the impeller should be
spinning while measuring to eliminate its magnetic pull.
True north vs. Magnetic north Readings
The Kestrel 4500's default Direction display mode is
Magnetic North.
To view Direction in True North mode:
• Go to weather mode in the Direction screen, press
.
• Use or to choose your mode.
• If you choose True North, use to highlight “Varia-
tion”, then use or to input the Variation for your
location.
To measure Direction:
• Hold the unit vertically and point the BACK of the unit
toward the direction you want to measure.
• The unit will display the cardinal direction and degrees.
The Direction measurement does not record Max and
Average and will display N/A on that mode screen.
Measuring Headwind/Tailwind & Crosswind
The Kestrel 4500 automatically calculates Headwind and
Crosswind with respect to a runway or target direction.
You must first set the “Heading” to view these measure-
ments:
• Press
while on the Headwind or Crosswind screen.
• Use or to choose “Auto Set” or “Manual Set”,
then press .
In Auto set: Point the unit down the runway or target,
then press to automatically set the heading.
In Manual set: Use or to enter the known runway
or target heading, and press to save.
Both screens will always display the Magnetic North
heading at the top (even if the Direction screen is set to
True North mode).
• After setting the heading, scroll to the desired
parameter and orient the Kestrel so the wind blows
directly through the impeller.
Info for Wind Speed & Direction of fire for ballistic
solutions can be found on pg 16.
COMpAss CAlIBRATIOn AnD sETup (COnT.)