MAINTENANCE & TROUBLESHOOTING
Storing Your Kestrel
Avoid storing your Kestrel where it will be exposed to temperatures below -20°C
[-4°F] or above 80° C [176° F] for extended periods of time. Doing so may
permanently damage the LCD, electronics, battery or enclosure. (Note that the
inside of a car parked in the hot sun can reach very high temperatures.) If the
temperature of the actual LCD of your unit exceeds 70° C [158° F], it will temporarily
become solid black until it cools down to below this temperature.
Use of the Lanyard and Cover
Your Kestrel is shipped with the slip-on cover captivated by the lanyard to prevent
loss. If you prefer to be able to remove the cover entirely, open the lanyard end
cap with a small screw driver, then remove the slip-lock. Slide the cover completely
off the lanyard, then reassemble the slip-lock and lanyard end cap as before.
Replacing the Battery
When your display grows dim or blank,
replace the battery. Use a large coin to open
the battery compartment. Insert a new
CR2032 coin cell (available wherever watch
batteries are sold), positive (+) pole up. 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 which responds to the
earth’s magnetic fields. This does not affect the accuracy of the windspeed
readings because the magnetic field applies both a braking and an accelerating
force which cancel each other. The impeller has been calibrated to be accurate
to within at least ± 3%.
High Speed Use
After several 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
sapphire bearings in the impeller assembly. If you require accurate high AND low
speed measurements, we recommend a second impeller.
Troubleshooting a Damaged Impeller
If the impeller rotates, but only “0” or “—” shows on the display, the impeller may
no longer be sending a signal to the unit. Test the unit by turning it on and placing
it near an electromagnetic source (i.e. back of computer monitor or TV). If the
display shows any number other than “0” or “—”, the unit does not need to be
returned but does need a new impeller assembly. Contact Nielsen-Kellerman or
your place of purchase to order a replacement.
Replacing the Impeller
Press FIRMLY on the sides of the black
impeller housing with your thumbs to
remove the entire housing. When inserting
the new impeller, be sure the arrowis
facing the display side of the unit, and
is aligned with the top of the meter.
Press on the sides of the housing rather
than the center.
2000
WARRANTY & SERVICE
Warranty
Your Kestrel is covered by a full parts and labor warranty for one year from your
date of purchase. The provisions of this warranty do not apply to: a) batteries,
whether contained in a unit or sold individually; b) units which have been subjected
to misuse, negligence, accident or improper maintenance or application; or c) units
which have been repaired or altered by a party other than Nielsen-Kellerman’s
employees or agents without Nielsen-Kellerman’s prior written consent.
Parts and Service
To order replacement parts for your Kestrel or obtain warranty service please
contact Nielsen-Kellerman or your original place of purchase.
ADDITIONAL INFORMATION
What is a “Kestrel”? The American Kestrel is the smallest North
American falcon. Beautiful and highly adaptable, it can be
found virtually everywhere in North America. It is unique among
falcons for its ability to both hover at very low speeds and dive
at very high speeds.
Assembled in the USA. The Kestrel 2000 is protected by US
Patents 5,783,753 and 5,939,645. Nielsen-Kellerman reserves
the right to change product specifications. © 1999. Kestrel, the
Kestrel logo, NK and the NK logo are trademarks of the Nielsen-
Kellerman Co.
Force Description Kts
0Calm 0
1 Light Air 1-3
2 Light Breeze 4-6
3 Gentle Breeze 7-10
4 Moderate Breeze 11-16
5 Fresh Breeze 17-21
6 Strong Breeze 22-27
7 Near Gale 28-33
8 Gale 34-40
9 Strong Gale 41-47
10 Storm 48-55
11 Violent Storm 56-63
12+ Hurricane 64+
BEAUFORT SCALE
The Beaufort Scale is a system for
estimating wind force without the use
of instruments based on the visible
effects of the wind on the physical
environment. The behavior of smoke,
waves, trees, etc., is rated on a 13 point
scale. The scale was devised in 1805 by
the British naval Commander Sir
Francis Beaufort (1774-1875) and is
still commonly used by mariners.
WIND CHILL
The Kestrel 2000 automatically calculates wind chill, which can provide useful
guidance when preparing for cold-weather outdoor activities. “Wind chill” provides
an indication of how cold it feels given the combined effects of the actual air
temperature and the wind speed. Wind Chill based on National Weather Service
standards as of Nov. 1, 2001. For more information about the derivation and
meaning of wind chill, visit www.nkhome.com.
NIELSEN
-
KELLERMAN
104 West 15
th
Street, Chester, PA 19013 USA
Phone (610) 447-1555 • Fax (610) 447-1577
Web www.nkhome.com
E-mail kestrel@nkome.com
Rev’d 14 July 02
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