INSTRUCTION MANUAL
AVAILABLE WITH
Wireless Data Transfer
CAUTION
!
Your Kestrel Ballistics Weather Meter is designed to provide accurate measurement
of current conditions only. Depending on your location and environment,
Rapid temperature and humidity changes (i.e., moving your meter from indoors to outdoors) may cause inaccurate readings of
temperature and humidity as well as all readings that rely on either of these values. Before relying on a Kestrel Ballistics Weather
Meter readings, use care to either a) force air ow over the sensors by waving or slinging your meter through the air; or b) wait
until your unit’s readings have stabilized, indicating it has equilibrated to its new environment.
To maximize the accuracy and reliability of your readings:
• Ensure that your Kestrel Ballistics Weather Meter is in good repair and within factory calibration.
• Tak e readings frequently and carefully according to the guidelines above.
• Allow your meter’s readings to stabilize after signicant changes in temperature or humidity (i.e., changing location
from indoors to outdoors).
• Allow a margin of safety for changing conditions and reading errors (2-3% of reading is recommended).
Use extra care and good judgment when referring to your Kestrel Ballistics Weather Meter to make
2
any decisions regarding safety, health or property protection.
conditions may change rapidly.
OVERVIEW
Features & Options .............................................. 4
Getting to Know Your Kestrel ............................ 5
Battery Installation .............................................. 6
Compass Calibration and Setup ....................... 7
Barometric Pressure & Altitude Setup ............. 8
AB MODE
Basic Navigation and Getting Started ............. 9
Gun Selection .......................................................10
Gun Library & Information Screen ................... 11
Target Screen ........................................................13
Environment Screen............................................ 15
Range Card Screen ..............................................16
Ballistics Screen ................................................... 17
Calibration & Custom Drag Curves ...................17
Bluetooth Setup ................................................... 18
Quick Keys ............................................................. 19
*for BLUETOOTH®-enabled models ONLY
WEATHER MODE
Setup and Options .............................................. 20
Screen Navigation ...............................................23
Impeller Replacement ........................................ 25
Glossary of Terms.................................................26
Ballistic & Environmental Quick Ref ................. 27
Full Range Card Data sample ............................29
Specications .......................................................31
Choosing & Using Batteries ............................... 33
Warranty ................................................................ 35
NK, manufacturer of Kestrel brand Ballistics Weather Meters
is available to answer questions and provide support.
Contact NK by phone: 610.447.1555; fax: 610.447.1577;
email: info@NKhome.com; or web: NKhome.com
3
FEATU RES & OPTIONS
Measurement/ Units of Me asure Icon 4500
Wind Dire ction (Cardinal Points, Degrees)
Wind Spe ed | Air Speed (mph | fp m | Bft | m/s | km/h | kt )
Crosswin d Calculation (mph | f pm | Bft | m/s | km/h | k t)
Headwin d | Ta ilwind (mph | fpm | Bf t | m/s | km/h | kt)
Temperatur e* (˚F | ˚C)
Wind Chill ( ˚F | ˚C)
Relative H umidity (Gpp | G/kg)
Heat Stress I ndex (˚F | ˚C)
Dewpoi nt Te mp (˚F | ˚C)
Wet Bulb Temp (˚F | ˚C)
Barome tric Pressure (inHg | hPA | psi | mb)
Altitude, m | ft
Densit y Altitude, m | ft
Pressure Trend
Backlit Display
Data Stora ge Points 2900
BLUET OOTH®
4
NV Backl ight
Standard • | Optional
w/Applied Ballistics
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GETTING TO KNOW YOUR KESTREL
FRONT
HUMIDITY
SENSOR
MANUAL
MEMORY
BUTTON
REPLACEABLE
IMPELLER
BACKLIGHT
BUTTON
NAVIGATION
BUTTONS
DATA UPLOAD
OPTICAL COUPLER
BACK
AMBIENT
TEMPER ATURE
SENSOR
SERIAL NUMBER
WIDE RANGE
PRESSURE
SENSOR
AAA BATTERIES (2)
POWER / SETUP
BUTTON
Even when the Kestrel display is o, the unit will still automati-
cally collect and store data at the dened rate (see “Memory
Options” ). To completely power down the unit, you must
remove the batteries (and lose time / date and other settings)
SELECT / EXIT
BUTTON
* All Kestrel Meters with tem-
perature measurement allow
you to measure air, water and
snow temperature.
STABILIZING
BATTERY
ORIENTATION SHIM
5
BAT TERY INSTA LLATIO N
• Inse rt batteries into bot tom of
Kestrel uni t a s s hown on battery
door.
• Snap doo r c losed.
Turning ON an d OFF
to turn on the meter.
• Press
• Ho ld for 3 seconds to turn o
the meter.
You can also select “O ” on the
Main Setup M enu options.
Date & Tim e
to enter the Main Setup
• Press
Menu.
• Use
or to highlight Date
& Time.
• Press to enter the Date & Time
Screen.
or to change each valu e.
• Press
6
KESTREL 4500:
AAA batteries have a magnetic signature strong
enough to aect the Kestrel 4500’s compass
readings. Please follow this extra step to ensure
the batteries stay in proper orientation.
Before closing the door, push the plastic shim
(provided with unit) between batteries and place
clear ring on end over positive battery “bump.”
When replacing batteries in the Kestrel 4500, always keep
the shim and re-insert with new batteries as described.
COMPASS CALIBRATION AND SETUP
In additio n to Wind Spee d and Wind Chill , the Kestrel
with Appl ied Ballisti cs Software also measures
Direc tion, Headwind/ Tailwind and Crosswin d.
Digital Compass Calibration
The Kest rel meter's digital com pass must be calibrated
to correct for th e AAA batterie s’ magnetic eld. It must
be re-cal ibrated every time the b attery door is op ened,
and it will not displ ay or log any directio n values until
calibratio n is complete.
**Impel ler should be removed durin g calibration for best
results.
• Rem ove the impeller by pressing the ed ges to pop it out
(reinser t after calibratio n i s c omplete).
To Calibrate :
• In Main Set up Menu, use
“System”, then press
to highlight “Comp ass Cal”, then press .
• Press
Follow the pr ompts on scree n:
to start.
• Press
• Slowl y spin the upright meter aroun d t hree (3) full times .
• Eac h r otation should take appr oximately 10 seconds.
• Whe n calibration is nishe d, the screen will read
“Cal Comple te”.
to exit to Main Menu.
• Press
To verify the digi tal compass’ accurac y, t est it against a
or to highlight
.
compass; the Ke strel meter reading s should be wit hin
±5° of the refere nce compass or better. If read ings appear
incorre ct, simply run the calib ration routine agai n.
Calibration Error Messages
There are thre e error messages that th e meter may
display duri ng calibration. Pre ss
screen and ru n the calibration agai n.
• Magnetic Bat teries: The magneti c eld of the Kestrel’s
batter ies is interfering with ca libration. Try openin g the
batter y door, rotate one or both batter ies, and run the
calibra tion again. If error persi sts, try using a dierent
brand of batt ery.
• Too Slow: The unit was
spun too slowl y d uring
calibration.
• Too Fast: The unit was
spun too quick ly during
calibration.
Figure 1
to exit the error
3x
7
COMPASS CALIBRATION AND SETUP CONT.
Measuring Direction
The Kestr el 4500’s digital compass mu st be vertical to
achieve accurat e readings. Keep the unit p ositioned as
close to vertica l as possible when using any com passrelated featu re. After openin g the battery door, you
must re-ru n the calibration routin e or readings will not
register. For maxi mum accuracy, the impel ler should be
spinning whi le measuring to elimina te its magnetic pull.
True North vs. M agnetic North Readings
The Kestre l 4500's default Direc tion display mode is
Magnetic North.
To view Directi on in Tr ue North mode:
• In the Dire ction screen press
or to choos e y our mode.
• Use
• If you cho ose Tr ue North, use
tion”, then use
location.
To measure Di rection:
• Hol d the unit verti cally and point the BACK of the unit
toward the dire ction you want to measure.
• The unit wi ll display the card inal direction and de grees.
The Direc tion measurement doe s not record Max and
Average and will displ ay N/A on that mode screen.
8
or to input the Vari ation for your
.
to highli ght “Varia-
Measuring Headwind/Tailwind & Crosswind
The Kestre l 4500 automatically ca lculates Headwin d and
Crosswin d with respect to a runway or targ et direction.
You must rst set the “H eading” to view these mea surements:
while on the Headwi nd or Crosswind screen.
• Press
or to choose “Auto Set” or “Man ual Set”,
• Use
then press
In Auto Set: Point the unit down the runw ay or target,
then press
In Manual Set: Use
or target headin g, and press
Both screen s will always display the Magne tic North
heading at the top (even if the Dir ection screen is set to
True North mode).
• Af ter setting the headin g, scroll to the desired
parame ter and orient the Kestrel so the wind bl ows
direct ly through the impeller.
Info for Wind spe ed & direct ion of re for ballistic soluti ons
can be found on pg 15
.
to automa tically set the heading.
or to enter the know n runway
to save.
BAROMETRIC PRESSURE & ALTITUDE SETUP
Settin g B arometric Pressure & Altitude
The Kestre l meter measures “stati on pressure”, which
changes in res ponse to both changes in alti tude and
changes in atm osphere. Barome tric pressure is a
measurem ent of the air pressure adjus ted to sea level.
Station pressure is di splayed if the reference a ltitude is
set to zero. This is nee ded for ballistics so lutions as well.
Be sure to adju st your reference measur ements for
altitude an d/or barometric pres sure when you change
your locatio n or when there have been dram atic
changes in wea ther conditions.
Obtaining Station Pressure
• In the Main Setup Men u, use or to highlig ht
“Weathe r M ode”, then press .
• Use or to scroll to highl ight the “BARO” screen
• Press to enter the “R EF BARO” screen
• Set the refere nce altitude to zero for statio n p ressure.
Set it to your current alti tude if you want barometri c
pressure
Baro— Displays current Ba rometric Pressure
Ref Alt—Use
Sync Alt—Use or to switch “On” and s ync the Baro
reading to the “Altit ude” screen
When “Sync Al t” is turned “On,” the curr ent
“Densi ty Altitude” screen da ta is calculated from the
absolute value s of station pressure, relative hum idity
and temp., and is not aec ted by the reference values
entered in the “Bar o” and “Altitude” screens.
to set the known Al titude
or
Barome tric Pressure data is automat ically used as a
referen ce for Altitude, and both scr eens will show
accurate rea dings.
REF ALT
Alt 877
Ref.Baro 30.97
SyncBaro On
adjust exit
Setting Altitude
• In the Main Setup Men u, use or to highlig ht
“Weathe r M ode”, then press .
• Use or to highlig ht the “Altitude” sc reen
• Press to enter the “R EF ALT ” s creen
• Set the ref erence altitude to your curre nt altitude.
When “Sync Ba ro” is turned “On,” the curre nt Altitude
data is automat ically used as a referenc e for Barome tric
Pressure, an d both scree ns will show accurate readin gs.
REF BARO
Baro 30.15
Ref.Alt 115
SyncAlt On
adjust exit
syncs
syncs
REF BARO
Baro
Ref.Alt 877
SyncAlt
adjust exit
REF ALT
Alt
Ref.Baro 30.15
SyncBaro
adjust exit
9
BASIC NAVIGATION & GETTING STARTED
THE KESTREL HAS SEVEN NAVIGATION KEYS:
Capture
Left-Arrow
Power On/
Escape Key
Quick Tips:
Your Shooter's Weather Meter with Applied Ballistics
(AB) can operate in Weather mode or AB mode. For
instructions related to Weather Mode, see page 21.
Compass must be calibrated in order for directional
features to work in AB mode. Compass calibration can be
done from the main menu screen. See page 7.
Pressing
When a ballistics parameter is underlined, this indicates
that the value cannot be changed manually on the
current screen. This is either because it is a calculated
value or determined by the sensors. Press and hold for
2 seconds to power down the Kestrel regardless of current
10
Up-Arrow
Down-Arrow
Backlight
Right-Arrow
Center Key
will allow you to exit out of a particular screen.
screen. Press twice in rapid succession to instantly
change between Weather mode and AB mode.
Any changes in information are automatically saved
upon exiting the current screen. There are four
exceptions to this rule where an “accept” screen appears
upon exiting: the Target Range estimator, the Target
Speed estimator, and the MV and DSF Calibration
screens.
Getting started with AB Mode
The three main data input groups are gun, target
and environment. The aiming solutions for Elevation,
Windage and Coriolis are displayed on the Main AB
screen.
1. Gun Information 2. Target
GUN Laru308
MV 2550FPS
DC G1
BC 0.475
BW 175gr
BD 0.308in
BL 1.240in
ZR 100m
BH 2.75in
RT 11.25in
RTd Right
EUNIT mil
Eclck n/a
Wunit mil
Wclck n/a
Cal MV
Cal DSF
View DSF
Clear DSF
Delete this gun
TARGET
Active
TR
DoF
Ide
Icos
TS
TD
WD
WS1
WS2
A box indicates amount of
data shown on display.
Data below box indicates
additional information
available by pressing .
*Note: Please see p. 27 for
abbreviation glossary.
Yes
1000
000º
g
1.000º
0mph
5mph
10mph
0˚
L-R
12oc
GUN SELECTION
3. Environment
ENVIRONMENT
Lat
Temp
SP
RH
Dalt
Coriol
store up to 16 guns. A user-created gun is dened as a
gun that has been modied for one or more parameter
values of the New Gun or any of the precongured guns.
A precongured gun is any gun loaded onto the Kestrel
using the AB Gun Loader software.
When a New Gun is modied, the name instantly
changes to UserGunX (where X is a number sux to
ensure the name is unique). If a precongured gun
(whose name ends in a letter) is modied, a number
will appear at the end to create a unique name. If a
precongured gun (whose name ends in a number)
is modied, a letter will appear at the end to create a
unique name.
• Turn on the unit. From the Main AB screen,
press to access the Main Setup Menu.
These three main data groups
No
determine an accurate ring
42˚
solution. The rst step in getting a
75˚F
ring solution is selecting your gun.
29.48inHg
50%
Gun Selection
1729ft
The Gun Selection screen allows you
Yes
to choose a precongured gun or
Onetgt
build your own. You may create and
• Press to highlight “Gun
Selection.”
• Press to enter Gun
Selection Screen. Here, you
may choose a precongured
exit
gun or build your own.
To Choose a Precongured Gun:
• Press or to scroll through the dierent guns.
• Press to turn your selected gun “on” or “o.” “On”
means the gun is available to be selected in AB mode.
“O” means the gun is not available to be selected.
For example, setting multiple guns to “On”
allows you to quickly switch gun congurations
without going back to the Main Setup Menu.
Laru308
User Gun2
User Gun
300WinMag2
• Use to highlight New Gun and press .
• This will take you to the gun information screen
where you may adjust all gun parameters. Press up or
down to highlight the gun parameters.
MaruGun308
AR15a
300WinMag1
New Gun
GUN New Gun
MV
BC
BW
11 Gun select
• Pressing on a gun gives you
the option to edit or delete this
gun.
To Build A G un:
You can build and name your gun
on the gun selection screen.
• Use and to adjust each
11 Gun select
value.
• To name your gun, scroll up to
highlight “Gun” and press .
• You will see a cursor appear
under the rst letter of New
Gun.
• Use the and buttons
to scroll through the alphabet
ps
2900f
and numbers 0-9 and several
symbols. Pressing inserts a
0.533
space between characters. You
g
190
r
can choose between upper and
lowercase letters.
11
GUN LIBRARY & INFORMATION SCREEN
• Once you’re on the desired letter, use to move
the cursor to the next space in the gun name.
Continue until the gun name is complete.
• When gun name is complete, press button to
save. (Gun will also automatically save upon
exiting screen.)
• Press to exit from the current screen.
Gun Library
There is room in the Kestrel for up to 16 guns. While it
is possible to copy a precongured gun to your Kestrel
and modify the parameter, you should use New Gun
and input all the parameters to ensure MV and DSF
Cal are accurately inputted. Build a gun library on a
computer using the AB Gun Loader software, and
downloading the new gun library to the Kestrel (either
via Bluetooth® connection or the Kestrel wired interface).
Downloading a new gun library will automatically
overwrite the previous guns in the Kestrel.
*Note: You should upload any user-created guns to the AB
Gun Loader software that you want to save before downloading new guns. The new guns will overwrite current
stored Kestrel guns.
Gun Information Screen
Once you have selected your gun, you’re now ready
to enter or modify all relevant parameters pertaining
to the set-up of your rie. These parameters include
muzzle velocity, drag curve, ballistic coecient, bullet
weight, bullet diameter, bullet length, zero range,
bore height, rie twist, rie twist direction and sight
adjustment (click).
• On the Gun Information screen, use buttons to
12
highlight the gun parameters.
• Use and to adjust the value.
• Press to enter the highlighted parameter’s
screen. Here you are also able to adjust the
parameter’s value as well as the unit of measure.
(For example, meters per second to feet per second.)
• Press to exit to Main AB screen once all values are
correct.
See below for more information on Muzzle Velocity, Drag
Curves and Calibration.
Muzzle Velocity
• Use and to highlight “MV.”
• Press to enter MV screen.
• Use and to adjust the value.
Notes on Muzzle Velocity
• When a bullet is in the transonic range, a small dot
will appear to the left of the muzzle velocity value
(gure 1).
• When a bullet is in the subsonic range, a larger dot
will appear to the left of the muzzle velocity value
(gure 2).
GUN Laru308
MV
BC
BW
• In cases where the bullet is supersonic, there are no dots
Figure 1 Figure 2
next to the muzzle velocity value.
•
1360fps
0.470
175
GUN Laru308
MV
BC
g
r
BW
1103fps
•
0.470
175
g
r
GUN INFORMATION SCREEN CONT.
Drag Curves
The Kestrel with Applied Ballistics allows you to use G1
or G7 drag curve model, or AB's custom drag curves.
• To select the appropriate drag curve, scroll to "DC."
• Use and to scroll through options.
• If a custom drag curve is used, no further adjustment
is necessary. If using G1 or G7 drag curves, you must
adjust the BC by scrolling down and editing to the
proper value.
For more information on the custom drag curves, please
see page 18.
Calibrate Muzzle Velocity
This allows you to calibrate your muzzle velocity
based on the actual drop of a round at a range where
the bullet is supersonic. With the range and the drop
entered, the Kestrel automatically adjusts muzzle
velocity to match.
• To access the muzzle velocity Cal, scroll to Cal MV to
highlight it and press .
MV Cal 1398m
Range 1275m
Drp 9.35mil
-Cal
MV 2826fps
• Use and to adjust the range at which you are
ring. The Drop will update with the range.
• Use to scroll to “Drp.” Use and to adjust the
value to match the observed drop of the bullet at
range.
• Use to scroll to “Cal" and press . The
Calculated Calibrated Muzzle Velocity value will be
displayed at the bottom of the screen.
• Press to exit to return to the Gun Information
The number shown to the top right
of the screen is the suggested range
distance at which to calibrate
muzzle velocity. It represents the
midpoint of supersonic for the gun
solution selected.
screen. The Kestrel will ask if you want to accept the MV
Calibration. Selecting "Yes" will use the Cal MV to update the
MV listed in the Gun Information screen.
For more information on Ballistics Calibration, please see
page 18.
Drop Scale Factor (DSF)
This allows you to enter and maintain a table of drop scale
factors (DSF) that utilize observed drop at range to calibrate
the elevation computation. The number shown to the top
right of the screen represents the suggested range distance
at which to apply a drop scale factor for transonic ight.
Additional drop scale factors can be added to the DSF table
by shooting at greater distances including subsonic ight.
Attempting to enter an additional drop scale factor that is
closer in range distance than existing DSF table entries will
invalidate and erase the existing entries.
• To access the DSF Calibration, use and to scroll to "Cal
DSF" on the Gun Information screen.
DSF Cal 1581m
Range 1275m
Drp 9.35mil
-Cal
DSF 0
to enter an additional drop scale factor that is closer in range distance than
existing DSF table entries will invalidate and erase the existing entries.
• Use
and to adjust the range at which you are ring
• Use to scroll to “Drp.” Use and to adjust the
value to match the observed drop of the bullet at range.
• Use to scroll to “Cal” and press . The Calculated
Drop Scale Factor will be displayed at the bottom of the
screen.
• Highlight it and press
The number shown to the top right of the screen
represents the suggested range distance at
which to apply a drop scale factor for Transonic
ight. Additional drop scale factors can be
added to the DSF table by shooting at greater
distances including subsonic ight. Attempting
.
13
TARGET SCREEN
• In order to accept the Calibrated DSF value, press
and select “Yes” by pressing .
Mach DSF
1 0.000 1.000
2 0.000 1.000
3 0.000 1.000
4 0.000 1.000
will update the rst row of your DSF table accordingly without clearing
the rest of your DSF table entries.
• Press to exit to return to the Gun
Information screen. The Kestrel will ask if you want to
accept the DSF Calibration.
• To view the DSF table, scroll to "View DSF" in the Gun
menu and press to see what DSFs have been
stored. You may repeat this step for up to six DSF
values. Please remember that entering DSF values at
ranges closer than previously entered will invalidate
DSF values at those longer ranges.
Target screen:
You can customize up to ve targets for location,
distance, direction, declination and wind.
• From the Main AB screen, use or to
TARGET
Active
TR
DoF
g
Ide
highlighted parameter’s screen.
The rst row of the DSF table will be
prepopulated with the mach value at which
muzzle velocity was calibrated and a drop
scale factor of 1.00. If ballistics calibration
was not completed, a default value of 1.2 will
be entered for you. However, calibrating your
muzzle velocity after establishing DSF table
highlight “Tgt” and press to
enter the Target screen.
• Use and to highlight a
Yes
parameter.
998m
• Use and to adjust values for
000º
each parameter.
0˚
• Press to enter the
14
Here you are able to adjust the parameter values as well
as the unit of measure. (For example, yards to meters.)
Multiple Targets
• You may create up to ve targets (A-E) by
highlighting “Target ” and pressing or to move
on to the next target. After changing targets, the
parameters can be changed by repeating the steps
outlined above.
Active
• The “Active” status of Target A defaults to “Yes”
because the Kestrel must have at least one active
target at all times.
• To make a target active, on the Target screen use
or to highlight “Active” and use or
to change to “Yes.” To make a target inactive, use
or to change to “No.”
• Setting a target’s “Active” status to “Yes” allows you
to view the ring solution for that target on the Main
AB screen.
• If multiple targets are active, you can use or to
scroll between all active targets (and their respective
ring solutions) on the Main AB screen.
Elevation
E
E
49.24
W
1.36/3.03
000°
Tgt
3oc
Wind
Target A is current
active target.
100 m
5m
R
p
h
Windage
HOLD
16.58
W
0.68/1.46
000°
Tgt
3oc
Wind
Target B is current
549 m
ph
5m
active target.
R
TARGET SCREEN CON'T
Target Range
• Use or to highlight “TR.”
• Use and to adjust the value.
Target Range Estimator
Range
TR
meters
Estimate
• Use to highlight “Estimate” and press to
enter Range Estimate screen.
• Use or to highlight a parameter.
• Use and to adjust values for each parameter.
• When all parameters are set, press to escape.
• An "Accept" screen will appear, scroll to "Yes" if you
would like to accept values. Use to select the
highlighted option.
Wind Direction & Wind Speed
There are two wind speed measurements on the target
screen (WS1 and WS2) for minimum and maximum
wind speed as well as wind direction (WD). You have
This function estimates the range
of a target based on size, image
998m
and calculated range.
• When “ TR” is highlighted, press
button to enter Range screen.
the option to manually adjust the
wind speed and wind direction
values or use the capture feature
to automatically get a reading.
Manual mode
• Use or to highlight “WD,” “WS1”
or “WS2.”
• Use and to adjust values for each
parameter.
Capture mode
• In the Target screen, press to enter into either the
“WD,” “WS1” or “WS2” screen.
• Press to enter into capture mode.
• Face the back of the Kestrel meter directly into the
wind and press to start and stop the capture
mode. Please ensure Kestrel impeller cover is open.
• The data collected in capture mode will automatically
adjust the “WD,” “ WS1,” and “WS2” values in the Target
screen.
*Note: WS1 can never be greater than WS2 value. The
WS2 value will automatically adjust to ensure that this
remains true.
Direction of Fire
Direction of Fire (DoF) is an absolute frame of reference
to true north. The value is the direction the gun barrel
is pointing with respect to the values on a compass.
Direction of Fire can be manually adjusted or obtained
using the ”Capture” feature.
Manual mode
• Use
or to ensure that “DoF” is highlighted.
• Use and to adjust the value.
Capture mode
• When “DoF” is highlighted, press
DoF screen.
• Use to scroll to “Capture.”
• Press to enter into the capture mode.
• Face the back of the Kestrel directly toward the target
and press .
• The data collected in capture mode will automatically
adjust the DoF value in the Target screen.
*Note: Compass must be calibrated in order to capture DoF.
See p. 7 for calibration steps.
to enter the
15
TARGET SCREEN CON'T
Inclination Angle
Inclination angle is the angle between the target and
the horizontal as seen by the shooter. This variable is
expressed in the Target screen as “Ideg” or “Icos,” where
Ideg is in degrees, and Icos is the cosine angle. These
can be manually adjusted by highlighting one and using
the and to change the value. Changing one will
automatically change the other appropriately.
Target Speed
• Use or to highlight “TS.”
• Use and to adjust the value.
Speed of motion
TS
miles per hour
Estimate
• Use to highlight “Estimate” and press to
enter Speed Estimate screen.
• Use or to highlight a parameter.
• Use and to adjust values for each parameter.
• When all parameters are set, press to escape.
• An "Accept" screen will appear, scroll to "Yes" if you
would like to accept values. Use to select the
highlighted option.
Target Direction
• Use to highlight “TD.”
• Use and to adjust “L-R” (left to right) or “R-L”
(right to left).
16
Target Speed Estimator
This function estimates the speed
ph
0m
of a target based on range,
movement, and time.
• When “TS” is highlighted, press
button to enter Speed of
Motion screen.
ENVIRONMENT SCREEN
ENVIRONMENT SCREEN:
The Environment screen contains all atmospheric
parameters, such as temperature, station pressure, and
relative humidity. Setting the “Update” parameter to
“Yes” automatically imports the Kestrel’s sensor data
into the Environment screen. The “Update” parameter
can also be set to “No” when it is highlighted by using
or ; while in this setting the temperature (Temp),
station pressure (SP), and relative humidity (RH) can be
manually adjusted.
ENVIRONMENT
Lat
Temp
SP
29.48inH
“No.” When on the “Yes” setting, the coriolis is taken into
account for the ballistics solutions.
*Note: station pressure (“SP”) is pressure reading that is
unadjusted for sea level. Sometimes, this is mistakenly called barometric pressure in ballistics software.
Barometric pressure is a pressure reading adjusted for sea
level. When shooting, station pressure is required. Station
pressure can be measured with the Kestrel by setting the
reference altitude to zero on the Barometric Pressure screen
in weather mode.
• Use or to highlight a
parameter.
• Use and to adjust the
No
values for each parameter.
42˚ N
75˚ F
g
Coriolis will default to “Yes”
unless you manually change it to
RANGE CARD SCREEN
RANGE CARD SCREEN
The Range Card screen shows detailed information
about the ballistic solution at various ranges that apply
to the currently selected target and gun. The screen
displays three columns comprised of the Range and
Elevation (in the left two columns) and one other
variable. The other variable that can be displayed is
ballistics solutions based on “Wnd1”; “Wnd2”; “Lead”;
or further information on bullet ight characteristics
such as remaining velocity (“RemV”); remaining energy
(“RemE”); time of ight (“ToF”); and maximum ordinate,
or height above the line of sight to the target (“MaxO”).
Please see Page 29 for a sample Range Card.
• Use or to scroll to a particular range.
• Use and to scroll across and view all
available parameters.
RANGE CARD
Elv
Rng
300
400
500
Example: "Rng" and "Elv" columns remaining xed while
third column can be changed.
Range Increment
• Use while in the Range Card to enter the
• Use and to adjust the range increment to the
Wnd1
5.50
L0.13
9.42
L0.19
14.06
L0.27
Range Settings screen.
desired value. You may adjust the increments to
RANGE CARD
Rng
Elv
300
5.50
400
9.42
500
14.06
RemV
1991
1823
1666
show in 10, 20, 25, 50, or 100 units of measure (yards or
meters).
• Press to exit "Range I ncrement" screen.
Note: The Range Card will display range values up to 4000
yards, or the closest equivalent in meters, depending on the
range increment.
Remaining Velocity
• A small dot will appear to the left of the remaining
velocity value to indicate the bullet is in the transonic
range.
• A larger dot will appear to the left of the remaining
velocity value to indicate the bullet is in the subsonic
range.
RANGE CARD
Rng
800
900
1000
RemV
.1272
.1177
.1101
RemE
629
538
471
17
BALLISTICS SCREEN
BALLISTICS SCREEN
The Ballistics screen displays complete information
about the ballistic solution that pertains to the currently
selected target and gun. The only parameter whose
value can be altered in this screen is the “Range” (this can
be done by using and to adjust the value).
• Use or to scroll to a particular parameter.
• Use to enter into a parameter screen for
further information about it or change unit of
measure.
• Use to return to the Ballistics screen.
Note: An R or an L will appear beside each solution to
indicate which side of the target you should aim.
APPLIED BALLIstIcs' sIgnAturE fEAturEs
AUTOMATED BALLISTICS CALIBR ATION &
CUSTOM DRAG CURVES
In an ideal world, shooters would go into the eld
knowing exactly how their chosen combination of
gun and ammunition will perform, calculated ballistic
solutions would always be correct, and a properly
delivered shot would always hit the target. In the real
world, ballistic data is often imperfect, and even well
delivered shots often miss. The best way to deal with
this is to allow ballistic parameters to be adjusted to
reect what is actually observed. When this is done
correctly, overall accuracy can be signicantly enhanced.
Ballistics calibration is used to calibrate the inputs of
the ballistic model to match the actual rie and round
used for shooting. In particular, the most signicant
18
CALIBRATION & CUSTOM DRAG CURVES
parameter is the muzzle velocity of the round (since the
Kestrel is measuring environmental conditions, and the
other specications of the rie are well known). By ring
at a target at a range where the round is supersonic
(Mach number greater than 1.2), the muzzle velocity
can be determined from the drop of the bullet at that
range. This works because the drag of the bullet is well
understood and accurately measured in the supersonic
region. Muzzle velocity calibration is the most important
calibration procedure, and should be performed if a
dierence in observed and calculated drop is noticed in
the supersonic region.
For longer range shots, in the transonic (Mach number
between 0.8 and 1.2) and subsonic (Mach number
less than 0.8) regions, additional calibration may be
necessary to compensate for variations in the ight of
the bullet. This is where drop scale factors are utilized
to rene the trajectory of the bullet to match observed
drops at longer ranges, but after verifying that the
muzzle velocity has been calibrated at supersonic
range. DSF calibration should be performed if a
dierence in observed and calculated drop is noticed
at ranges greater than the calibrated muzzle velocity
range.
Applied Ballistics’ model allows for the input of a
single BC when using a G1 or G7 curve. Once the
appropriate BC (provided by the bullet manufacturer)
has been entered, muzzle velocity calibration should be
performed, followed by DSF Calibration (if necessary) for
longer range shooting. It is recommended that custom
drag curves be used whenever possible for maximum
accuracy.
The AB Kestrel includes two automated ballistic
calibration tools that dramatically increase accuracy at
long range. First, muzzle velocity is calibrated by ring
at a range where the round is supersonic. The user
enters the actual drop at that range, and the AB solver
computes the calibrated muzzle velocity automatically.
Second, for long range shooting - where the round
is transonic or subsonic - AB uses the actual drop at
another range to automatically compute the drop scale
factor (DSF).
This DSF provides a ner level of control in the transonic
and subsonic ights than BC-Mach/Dist tables,
especially when used with the custom drag curves that
Applied Ballistics has computed for many common
bullets. While AB's solver supports the use of G1 and G7
ballistic coecients, these custom drag curves oer a
new level of accuracy that cannot be matched by the
conventional G1/G7 ballistic tables. Your Kestrel comes
pre-loaded with the following custom drag curves:
• .308 175gr Sierra Matchking
• .308 175gr Berger Target Hybrid
• .308 190gr Sierra Matchking
• .308 230gr Berger Target Hybrid
• .338 250gr Lapua Scenar
• .338 300gr Lapua Scenar
• .338 300gr Berger Target Hybrid
• .338 300gr Sierra Matchking
Additional custom drag curves will be accessible
through the AB Gun Loader software.
BLUETOOTH SETUPCALIBRATION & CUSTOM DRAG CURVES
To transfer your Kestrel’s real-time and logged data
wirelessly and automatically to a laptop, PDA or
smartphone (Android only at this time), follow these
setup steps.
Enable the Kestrel’s BLUETOOTH Capability
• Press to enter the Main Menu.
• Use or to highlight “Bluetooth,” then press
.
• Use or to change from “O/Disabled” to “On
Ready.”
Set BLUETOOTH Range
In Bluetoo th screen:
• Use
or to highlight “Range”.
• Use and adjust the range to “Low” (3ft), “Medium”
(10ft), or “High” (30ft).
Obtain your Kestrel BLUETOOTH PIN and ID
For added security, each Kestrel comes with a unique
PIN and ID number to ensure proper pairing.
In the Blueto oth screen:
• Use
to highlight “Inf o,” then press t o v iew your
unique ID and PIN.
Pair Your Kestrel with Your Computer
First, make su re your Kestrel unit’s Blu etooth and your
computer 's Bluetooth are enabl ed. Open the Bluetoo th
managem ent software on you r computer to ad d a
Bluetoo th connection and fo llow the prompts to enter
the PIN. A COM Port will be ass igned in the communica tor
soft ware. To understand which COM Por t is being used,
please che ck your computer control p anel settings.*
19
BLUETOOTH SETUPCON'T
QUICK KEYS: DIRECTION OF FIRE & WIND SPEED
This is a gene ral guideline for pai ring your Kestrel with
your compute r. Individual Blueto oth software pro grams
and navigat ion may vary, and some comp uters do not
come equipp ed with Bluetooth cap ability and will ne ed
addition al products to commun icate via Bluetooth.
* A “Blue tooth Error” screen w ill appear on the Kestre l if
pairing is unsucce ssful.
Set Up Kestrel Communicator Software
• Go to: http://www.nkhome.com/support/pdfs.html.
Download and install the Kestrel Communicator
Software from this link.
• Once installed, the “Kestrel Communicator” icon will
appear on your desktop. Click on the icon and use
the “Help” tab to nd full instructions for use.
Set Up Applied Ballistics Gun Loader Software
• The Applied Ballistics unit comes pre-loaded with
six custom curves. In order to gain access to the full
library of available custom curves, you will need to
download this application and ensure that you have
the ability to load guns to your Kestrel unit from your
PC via Bluetooth connection or IR Docking Station.
• Go to http://www.nkhome.com/ABProleLoader.html
to download and install the Applied Ballistics Gun
Prole Loader PC application.
QUICK KEYS: DIRECTION O F FIRE & WIND SPEED
The Direction of Fire (DoF) and Wind Speed (WS1 &
WS2) Quick Key feature allows you to quickly and easily
change the values of these parameters from the Main
AB screen without entering into the Target screen. It
minimizes the number of button presses and time by
instantly capturing these values from one screen- the
20
Main AB screen.
Direction of Fire Quick Key
• Pressing the button while Tgt is highlighted will
enter the DoF setting mode.
• The Tgt heading will change to to indicate the
setting mode.
• The direction will be continuously updated on the
target line.
• Pressing the button again will capture the
current direction as DoF.
• Nex t the wind heading will be highlighted, follow
the directions below wind speed quick key
Wind Speed Quick Key
• Pressing the button while Wind is highlighted
will enter the Wind setting mode.
• The Wind heading will change to to indicate
the wind setting mode.
• The moving 5-second average for windage and
wind speed will be continuously updated on the
wind line.
• The moving 5-second average for wind solution will
be continuously updated.
• Pressing the button again will capture the
current wind speed.
• The Wind heading will return to its normal state.
• The Wind line will show the captured relative wind
direction and wind speed.
• After capturing wind speed, DoF is not automatically
selected. Use Manual DoF rst if you need to
manually adjust both values.
WEATHER MODE
SETUP & OPTIONS
Main Setup Menu
• Whe n unit is on, press
which is used to custom ize preferences.
• Press
and to scroll thr ough the options.
• Press to select the high lighted option.
Date and T ime Setup
• Af ter battery insta llation, the meter will autom atically
enter the Date and Tim e S etting mode.
• Press and to scroll to each option.
• Press and to adjust eac h o ption.
• Press the button to exi t to the Main Setup Menu .
System
Contrast , auto shutdown, and calib rations can be
recong ured as needed in the Syste m screen.
• Use or to highlig ht one of the following
options:
Contrast
• Pres s or to increase or dec rease the display contrast
from 0 (lightes t) to 20 (dar kest).
Auto Shutdown
• Pres s or to set the time at which the disp lay will
automati cally shut o after non- use (choose 15 min, 60
min, or O to de-ac tivate auto shutdown).
Batte ry life will be shor tened if the Auto Shutdown is
turned to “O.”
Baro Cal
Recali bration of this sensor is not reco mmended without
speaking to an N K technician. See “Ba rometric Pressure
to access the Main Setu p M enu
& Altitude Set up” section on page 9 for ca libration
instructions.
Humidity Cal
Recalib ration of this sensor is not recommend ed without
speaking to an NK techn ician. Full humidit y calibration
instruct ions are provided with the Kestre l RH Calibration
Kits. The unit ma y also be returned to NK for calibratio n. Visit
www.nk home.com for more infor mation.
Date & Time
to enter the Main Setup Me nu.
• Press
• Use
or to highlight Date & Time.
• Press to enter the Date & Time Screen .
or to change each valu e.
• Press
Language
Display tex t can be set to 1 of 5 languages: English , French,
German , Italian , a nd Spanish.
• Press or to scroll the desired lan guage.
• Press to sele ct the highlighted lang uage.
Restore
This menu cont ains options for globa l s ettings of all units
to metric or imp erial, and returnin g the refere nce values for
the Alt and Baro scr eens to default (0 ft, 29.92 inHg).
To change units:
• Pres s or to scroll to the desired setti ng and
press or .
To return the refere nce values for the Baro and Alt scr eens
to default :
• Scro ll to Default s and press or .
21
SETUP & OPTIONS CO NT.
Memory Options
• Press or to scrol l to on e of these optio ns:
Clear Log Go Press or to clear sto red data
Reset MMA Go Press or to clear Min/
Auto Store On Press or to turn “On”
Store Rate* 1hr Press or to increase or
Overwrite On Press or to turn “On” (will dis card
Man Store On Press or to turn “On ” o r “O”
* When unit is o, data will conti nue to be stored unless the
2 sec or 5 sec Store Rates have been sele cted.
Data Storage
To manually store dat a, press the button. T he screen
will conrm dat a storage status.
• Data Stored: veries tha t d ata was captured and will
appear on char t.
• Full: indic ates overwrite is o and data log is full .
22
(will also cl ear Min/Max/Avg lo g).
Max/Avg data
(Chart data will remain intact).
(data will automatically store
at Store Rate) or “O ” (data
will only store when manually
captured with the button).
decrease frequency at which
data is stored (from 2 sec - 12
hr).
oldest dat a point to capture new
data when lo g is full) or “O” (will not
capture new dat a w hen log is full).
(O will disab le but ton).
• O: indicate s t hat the Manual Store button has bee n
disabled.
See Main Setu p Menu for more informatio n on memory.
Measurements
Use this setup to “hid e” unwanted Measurem ent screens
from the nor mal Measurement navi gation.
SETUP & OPTIONS CONT.
• Use or to scroll to the desir ed Measurement
screen.
• Press or to turn scre en “On” and “O”.
The Kestr el Meter will continue to log d ata for hidden
measureme nts. To view logged data of the hidd en
measureme nt, go to Measurement setu p, select the
Measureme nt screen you want to view, and turn it bac k
“On .”
When the Kest rel is in Chart mode, the uppe r and lower
limits of the gr aph scale may need to be adjust ed to fully
view all data po ints. You can customize thes e value limit s
using the Gra ph Scale setup.
• Pres s or to scroll to the Measureme nt you want
to adjust, then pr ess .
• In the new scr een, use or to highlight “Set High”
or “Set Low”.
• Pr ess or to adjust the val ue limit of your
chosen option.
Units
This setup op tion lets you selec t units of measu re to best
suit your appl ication.
• Use or to scroll to each measur ement.
• Press or to change the unit of mea surement.
User Screens
The Kestre l allows you to set up to 3 customized User
Screens th at will display 3 current Measurement val ues
on the same scre en. These screens ar e helpful fo r quick
referen ce if you need to monitor multip le measurements
at once. The User Sc reen option allows you to cu stomiz e
your user s creens.
• Press or to highlight .
User Screen 1, 2 or 3, then press .
• Use or to set your pref erred meas ureme nt opt ion.
• Pre ss or to hi ghlight
the remaining lines, and us e or to set thos e
Measurement options.
Repeat the se steps to set up the other User Scre ens.
When access ed through the Measure ment navigation,
each User Scre en will display current dat a for the chosen
measurem ents as programme d.
User Screen2
22.5 °F
48.6 %
1014.6 in Hg
Sample User Screen
23
SCREEN NAVIGATION
Measurement Screens
• Pres s or to scroll through the Meas urement
screens.
Measurement Modes
• From your cho sen Measurement scre en, use or to
scroll thro ugh the Mode options:
Current: Disp lays instantaneous rea ding.
Min/Max /Avg: Displays the Minimu m, Maximum, and
Average readin gs from stored data (Displa ys --.- if no data
has been store d).
Chart: Dis plays graph of stored data p oints for each
measurement.
Current Min/Max/Avg Chart
TEMP F
76.4
To View Chart Data:
• Pres s while viewin g a chart. A curso r w ill appear on
the most recen t d ata point.
• Press or
24
TEMP F
Min 32.4
Avg 67.9
Max 84.0
to scroll throu gh saved data:
56.0 F
Feb 27 16:58:14
TEMP F
— for data
The data valu e will be displayed at the top of the scre en.
The date and time wh en each data point was store d will be
displaye d at the botto m o f the screen.
• Pres s or to review the char t data for other
measurements.
MAX/AVG FUNCTIONS - Wind Spe ed & Wind Chill
These val ues are measured ind ependently fro m stored
and chart ed data to allow the user to st art and stop the
averagin g period in the manne r most appropriate fo r
their app lication. Averagi ng on all wind-rela ted values
will be sta rted and stoppe d together.
To measure the se values:
• Pres s or to scroll to a w ind measurement
screen, t hen use or
to begin coll ecting data.
• Pres s
• Pres s ag ain to stop data coll ection and displ ay the
Maximu m and Average values .
This routin e will work simultaneousl y for both
measureme nts, regardless of which one is disp layed when
run. No other Min/M ax/Avg or stored data will be aect ed.
to selec t Min/Max/Avg scre en.
• To clear data, pres s whe n the screen say s “— cl ear”.
Other me asurements will displ ay min / max / avg data
based on the data sto red in the log (using either auto stored or manu ally captured data). This data ca n be
cleared by using “ Reset MMA” under memor y options.
Backlight
• Press
to activate ba cklight for one minute.
• Press again to deact ivate the light manually.
IMPELLER REPLACEMENT
Replacing the Kestrel Impeller
Press only the sid es of the impeller when removi ng and
insertin g to avoid damaging the precisio n hub bearing. [
] .
Figure 1
• Pres s FI RMLY o n t he impeller module to remo ve it.
• Inse rt the new impeller so the side that has th e s mall
triangl e (cl ose to the perimeter) faces the fr ont of the
Kestrel wh en installed.
Figure 1
• Orie nt one “arm” of the modu le straight up .
[ Figure 2]. The i mpeller can be pu shed in from eithe r
side.
Figure 2
Kestrel
25
GLOSSARY OF TERMS BALLISTIC & ENVIRONMENTAL QUICK REFERENCE
Active gun: When a gun is made active, ballistic
solutions for that gun pertaining to all active targets are
readily displayed. Ballistic solutions for guns that are
inactive are not displayed.
Aiming/Ballistic solution:
corrections for windage, elevation, and in the case of
a moving target, lead for a selected active gun and
target, along with other calculated values such as bullet
velocity and energy. On the main AB screen, only
elevation and windage are displayed. On the Range
Card and
Ballistic Info screens, detailed ballistic solution data is
available.
Subsonic: The speed at which the bullet is slower than
the speed of sound. Bullet velocities in this range will be
displayed with a large dot to the left of the value.
Supersonic: The speed at which a bullet is gonig faster
than the speed of sound. Bullet velocities in this range
will have no dot next to them.
Target:
A target is characterized by its direction, range,
inclination angle, and applicable wind; a moving
target has a direction and speed of motion. Targets are
identied by a single letter: up to ve can be created,
designated by the letters A through E. It’s important to
note that wind is specic to a target – each active target
has its own wind specication.
Transonic: The speed at which the bullet slows to
the speed of sound. This is also seen as the boundary
between supersonic and subsonic. Bullet velocities in
this range will be displayed with a small dot to the left
of the value.
26
This consists of sight
Target Screen
Active – tells whether this target is currently active
TR – target range
DoF – direction of re (relative to true north)
Ideg – inclination angle (negative means the target is
below the shooter)
Icos – inclination cosine (cosine of the inclination angle)
TS – target speed
TD – target direction of movement
WD – current wind direction (direction from which wind
is blowing, relative to DoF)
WS1 – minimum current wind speed
WS2 – maximum current wind speed
Gun Screen
MV – muzzle velocity
BC – bullet ballistic coecient
DC - drag curve
BW – bullet weight
BD – bullet diameter
BL - bullet length
ZR – zero range
BH – bore height
RT – riing twist rate (distance in which bullet achieves
360 degrees of rotation)
RTd – riing twist direction (right = clockwise from
the shooter’s perspective)
Click – assigns an angular value to sight clicks
DSF - drop scale factor
DC drag curve – The amount of drag (air resistance)
applied to the bullet across various bullet speeds.
Eunit elevation unit – The units used for elevation
adjustments (Eclick). Can be mils, clicks, tmoa (True
BALLISTIC & ENVIRONMENTAL QUICK REFERENCE
Minute of Angle), smoa (Shooter’s Minute of Angle).
Eclick – elevation adjustment necessary for the ring
solution in the units specied above.
Wunit – windage unit – The units used for windage
adjustments (Wclick). Can be mils, clicks, tmoa (True
Minute of Angle), smoa (Shooter’s Minute of Angle).
Wclick – windage adjustment necessary for the ring
solution in the units specied above.
Environment Screen
Update – controls whether values for temperature,
barometric pressure, and relative humidity are
obtained automatically (yes) (from the Kestrel’s weathermeter functions) or are manually set by the user (no)
Lat – allows the user to specify the latitude that will be
used when calculating Coriolis corrections
Temp – temperature
SP – station pressure (actual pressure at the
gun’s location)
RH – relative humidity
Dalt – density altitude (calculated from pressure,
temperature & humidity)
Coriol – controls whether Coriolis corrections are
included in ballistic calculations
Wcap – toggles between applying windage correction
to just the current active target (one tgt) or to all targets
Range Card Screen
Elv – the elevation sight correction
Wnd1 – the windage sight correction based on WS1
Wnd2 – the windage sight correction based on WS2
Lead – the lead sight correction (for a moving
target)
RemV – the downrange bullet velocity
RemE – the downrange bullet energy
ToF – the bullet’s time of ight
MaxO – the bullet’s maximum ordinate
(height above the line of sight to the target)
Ballistics Data Screen
Range – the range for which the ballistic solution
is calculated
Elv – elevation correction
Wnd1 – windage correction (based on WS1)
Wnd2 – windage correction (based on WS2)
Lead – lead correction, based on specied
target motion
vCori – vertical Coriolis correction
hCori – horizontal Coriolis correction
Drift – bullet drift correction
RemV – remaining velocity
RemE – remaining energy
ToF – time of ight
MaxO – maximum ordinate (highest point the bullet
reaches in ight)
Drp – total drop distance
Rtrns – range at which transonic velocity
transition begins
Rt 75% – distance at which a bullet is 75% through
the transonic range
Rsubs – range at which bullet velocity
becomes subsonic
Range Estimation Screen
27
BALLISTIC & ENVIRONMENTAL QUICK REFERENCECON'T
Target – the size of the target on which estimation
is based
Image – the apparent size of the target as it appears
in a telescopic sight
Range – the calculated range, based on the target
and image sizes
Speed Estimation Screen
Range – the range at which the speed estimation
will be done
Mvmt – the apparent movement of the target as it
appears in a telescopic sight
Time – the time (in seconds) during which
movement was measured
Speed – the calculated speed, based on range,
movement and time
MV Cal Screen
Range – the range at which test ring is being done
Drp – the elevation correction calculated for the
specied range, updated by user with observed
drop
MV – the muzzle velocity used in the current elevation
calculation
DSF Cal Screen
Range – the range at which test ring is being done
28
Drp – the elevation correction calculated for the
specied range, updated by user with observed drop
DSF – the drop scale factor used in the current elevation
calculation
Sight Adjustments
TMOA – true minute of angle
MIL – USMC mils
FULL RANGE C ARD DATA SAMPLE
Sample of full Range Card data relative to data seen on display.
Rng Elv Wnd1 Wnd2 Lead RemV RemE To F MaxO
50 2.42 0.06R 0.10R 1.06R 2727 2891 0.059 0.10
100 0.62 0.09R 0.17R 1.07R 2633 2695 0.120 0.05
150 .079 0.12R 0.26R 1.09R 2541 2509 0.183 0.10
200 3.52 0.16R 0.34R 1.11R 2450 2332 0.249 0.63
250 6.93 0.20R 0.44R 1.13R 2361 2164 0.317 1.59
300 10.79 0.24R 0.53R 1.16R 2272 2006 0.388 3.05
350 14.98 0.28R 0.63R 1.18R 2188 1861 0.461 5.08
400 19.55 0.33R 0.73R 1.20R 2101 1716 0.538 7.79
450 24.37 0.37R 0.83R 1.23R 2021 1588 0.617 11.22
500 29.59 0.42R 0.95R 1.25R 1937 1459 0.700 15.54
550 35.10 0.47R 1.06R 1.28R 1859 1343 0.786 20.80
600 40.98 0.52R 1.18R 1.31R 1781 1233 0.876 27.15
29
FULL RANGE C ARD DATA SAMPLE CON'T
Rng Elv Wnd1 Wnd2 Lead RemV RemE To F MaxO
650 47.24 0.57R 1.31R 1.33R 1705 1130 0.970 34.73
700 53.92 0.63R 1.44R 1.36R 1631 1034 1.068 43.70
750 60.99 0.68R 1.57R 1.40R 1560 946 1.170 54.20
800 68.55 0.74R 1.71R 1.43R 1491 863 1.278 66.46
850 76.62 0.80R 1.86R 1.46R 1423 787 1.390 80.67
900 84.40 0.87R 2.01R 1.50R 1358 716 1.508 96.14
950 93.51 0.93R 2.17R 1.54R ·1295 652 1.631 114.8
1000 103.3 1.00R 2.33R 1.57R ·1236 593 1.760 136.3
1050 113.8 1.07R 2.50R 1.61R ·1178 539 1.896 160.9
1100 125.2 1.14R 2.68R 1.66R •1127 494 2.038 189.1
1150 137.3 1.21R 2.86R 1.70R •1089 461 2.187 221.1
1200 150.0 1.28R 3.03R 1.74R •1062 438 2.337 256.8
30
SPECIFICATIONS
Target
Gun
Feature Abbreviation Units Minimum Maximum
Active Targets N/A A through E 1 5
Target Range TR yards 25 4000
Wind Direction WD o’clock 1 12
Wind Speed WS1 or WS2 mph 0 50
Direction of Fire DoF degrees 0 360
Inclination Angle Ideg degrees -60 60
Inclination Cosine Icos no units 1.000 0.500
Target Speed TS mph 0 50
Target Direction of Movement TD Left to Right OR Right to Left
Name Characters N/A 0 through 9; A-Z; a-z; -+/.:&*
Muzzle Velocity MV fps 300 4500
Ballistic Coecient BC no units 0.100 2.000
Bullet Weight BW grains 10 1500
Bullet Diameter BD inches 0.10 1.00
Bullet Length BL inches 0.10 3
meters 23 3658
degrees 0 360
m/s 0 22
km/h 0 80
fps 0 73
knots 0 43
o’clock 1 12
m/s 0 22
km/h 0 80
fps 0 73
knots 0 43
and space
m/s 91 1372
grams 0.6 97.2
mm 2.54 25.40
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SPECIFICATIONS
Feature Abbreviation Units Minimum Maximum
Gun
Environment Station Pressure SP inHg 12.00 32.00
32
Bullet Diameter BD inches 0.10 1.00
Bullet Length BL inches 0.10 3
Zero Range ZR yards 25 1000
Bore Height BH inches 0.10 5.00
Riing Twist RT inches/revolution 1.00 36.00
Muzzle Velocity MV fps 300 4500
Twist Direction RTd Left OR Right
Riing Click /mil 1 10
Relative Humidity RH % 1 100
Station Pressure SP inHg 12.00 32.00
Coriolis Coriol Yes OR No
mm 2.54 25.40
mm 2.54 76.2
meters 23 914
cm 0.25 12.70
cm/revolution 2.54 91.44
/tmoa 1 10
/smoa 1 10
mb 406.4 1083.6
hPa 406.4 1083.6
psi 5.89 15.72
meters -3271 9987
mb 406.4 1083.6
hPa 406.4 1083.6
CHOOSING & USING BATTERIES FOR YOUR KESTREL
Your Kestrel meter is powered by t wo AAA size batteries. Here is a guide to selecting the right chemistry/type of battery
for your meter:
BATTERY TYPE EXAMPLE BRAND
Lithium AAA
Recommended by
Kestrel for most
applications!
Low Self-Discharge
Rechargeable NiMH
Alkaline AAA Duracell® Ultrapower
NAMES
Energizer® Ultimate
Lithium
*Energizer owns a
patent on Lithium
chemistry batteries in
the USA.
Eneloop®
Duracell®
StayCharged®
Tenergy® Centaura®
Energizer® Recharge
PowerPlus®
Duracell® Procell®
Energizer® Max
Rayovac®
(many others)
SELECTION CONSIDERATIONS
• Improved cold-weather operational range.
• Best capacity when streaming data via Bluetooth®.
• Relatively high cost. (Note: because the Kestrel is a low power
circuit, there is little advantage to the higher priced “Ultimate”
batteries.)
• Somewhat less available – need to purchase spares in advance.
• Precharged rechargeable batteries which hold their charge for
up to one year.
• Lowest capacity option.
• Option to charge multiple sets for use in the eld oers cost
savings, particularly with Bluetooth® data streaming.
• LESS likely to leak and cause corrosion when left in the Kestrel.
• Lowest cost option.
Most readily available.
• Easy to obtain and use for intensive, short-term operations.
• Restricted cold weather performance – Kestrel circuitry will not
operate below 0°F/-18°C.
• Environmental impact of disposal.
• MOST likely to leak and cause corrosion when left in the Kestrel.
Follow below guidelines for storage and removal carefully!
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CHOOSING & USING BATTERIES FOR YOUR KESTREL CONT.
We strongly recommend you use lithium or LSD NiMH
batteries at all times to avoid battery corrosion damage.
All alkaline batteries are prone to leaking, particularly as
they near full discharge. The potassium hydroxide that
leaks from an alkaline battery causes oxidation damage
to the circuit and components which is often irreversible
and is NOT covered under the Kestrel warranty.
IF YOU CHOOSE TO USE ALKALINE BATTERIES due to
cost or availability, you MUST:
• Remove the batteries for long-term storage (more
than one month of non-use). If you have your Kestrel
set to log data while o, it will slowly drain the
batteries, increasing the likelihood of leaking.
• Set your system battery selection to “Alkaline” to
obtain accurate capacity readings:
» Press to enter the setup menu.
» to “System”, to enter, to “Battery.”
» to select the correct battery type.
» to exit system setup.
• Change your batteries when below 20% capacity to
avoid fully discharging your batteries.
• Whatever batteries you choose:
• Use national name-brand batteries wherever
possible. Do not mix brands or chemistries of
batteries.
• Do not mix batteries of dierent ages or usage –
replace both batteries at the same time with new
batteries that have not reached their expiration date.
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• Inspect your batteries occasionally (at least every
three months) and remove immediately if you notice
ANY moisture or white crystalline material at either
end.
• Always store your Kestrel meter within the specied
temperature limits: -22.0 °F to 140.0 °F | -30.0 °C to
60.0 °C. Be particularly careful not to leave a Kestrel
meter with batteries installed inside a hot vehicle in
the summer.
What to Do if you Have a Leak
If you notice you have a leaking battery, be careful not
to touch it with your bare skin or allow it to come in
contact with your eyes as the leaking material is caustic
and/or toxic. Remove and dispose of both batteries. If
possible, loosen and vacuum out any white powder. DO
NOT BLOW INTO THE COMPARTMENT TO REMOVE THE
POWDER – it can cause eye or skin damage and will be
driven further inside the unit. You may attempt to use a
cotton swab moistened with white vinegar to clean the
contacts and gently swab out the battery compartment.
Do not exert any force against the contacts inside the
battery compartment or you may bend or break them.
Allow the battery compartment to dry completely and
try installing fresh batteries. If your unit powers up you
may continue to use it. If not, you may contract Kestrel
Support to inquire about our Customer Loyalty Trade-In
Program which provides a generous discount towards a
replacement Kestrel meter.
5YEAR LIMITED PRODUCT WARRANTY
WARRANTY CERTIFICATE
Your Kestrel Pocket Weather Meter is warrantied to be free of defects in materials and workmanship for a
period of FIVE YEARS from the date of its rst consumer purchase. NK will repair or replace any defective
meter or part when notied within the warranty period, and will return the meter via domestic ground
shipping or NK’s choice of method of international shipping at no charge. The following are excluded from
warranty coverage: damage due to improper use or neglect (including corrosion); damage caused by
severe or excessive impact, damage caused by failed or leaking batteries, crushing or mechanical harm;
modications or attempted repairs by someone other than an authorized NK repair agent; impeller failure
not caused by a manufacturing defect; normal usage wear; failed batteries; and accuracy issues resolvable
by recalibration. If no warranty registration or proof of purchase is provided, the warranty period will be
measured from the meter’s date of manufacture.
Except for the warranties set forth herein, NK disclaims all other warranties, expressed, implied or
statutory, including, but not limited to, the implied warranties of merchantability or tness for a
particular purpose. Any implied warranties that may be imposed by applicable law are limited to
the term of this warranty. In no event shall NK be liable for any incidental, special or consequential
damages, including, but not limited to, loss of business, loss of prots, loss of data or use, whether
in an action in contract or tort or based on a warranty, arising out of or in connection with the use
or performance of an NK product, even if NK has been advised of the possibility of such damages.
You agree that repair, and (upon availability) replacement, as applicable, is your
sole and exclusive remedy with respect to any breach of the NK Limited Warranty
set forth herein.
All product liability and warranty options a r e g o ve rn e d e x cl us i ve l y b y t h e l aw s of th e
Commonwealth of Pennsylvania.
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By
NIELSEN-KELLERMAN
21 Creek Circle, Boothwyn, PA 19061
Phone: (610) 447-1555
Fax: (610) 447-1577
Web: NKhome.com
Email: info@NKhome.com
Please register your Kestrel Meter at NKhome.com
Kestrel® Weather and Environmental Meters
are designed and manufactured in the USA
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NK#319915_REV0_13.7.16
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