Kestrel 3500 Delta T - Manual (Page 6)

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5-YEAR LIMITED PRODUCT WARRANTY
Your Kestrel Weather Meter is warrantied to be free of defects in materials and workmanship for a period of FIVE
YEARS from the date of its first consumer purchase. NK will repair or replace any defective meter or part when
notified 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, crushing
or mechanical harm; modifications 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 fitness 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 profits, 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 are governed exclusively by the laws of the
Commonwealth of Pennsylvania.
WARRANTY CERTIFICATE
Impeller
The Kestrel impeller calibration drift is less than 1% after
100 hours of use at 16 MPH | 7 m/s. Drift increases with
higher-speed use. For most users, the impeller will provide
accurate wind speed/air flow readings for years if not
physically damaged. However, if your application requires
extremely high precision or if you perform frequent
high-speed readings, we recommend you replace your
impeller at one-year intervals. Every replacement impeller
is supplied with a certificate of conformity and restores your
Kestrel’s calibration upon installation.
Temperature Sensor (Kestrel 2000 and higher)
The Kestrel temperature sensor exhibits virtually zero drift
over time and generally does not require recalibration for
accurate performance during the life of the product. If your
industry or application requires calibration, please contact
NK or a certified calibration lab for options and pricing.
Humidity Sensor (Kestrel 3000 and higher)
The Kestrel humidity sensor calibration drift may be up to
+/- 2% over 24 months. For high-precision applications,
we recommend recalibration at 24-month intervals. If you
require calibration, please contact NK or a certified
calibration lab for options and pricing. The humidity sensor
may also be recalibrated in the field using a Kestrel
Humidity Calibration Kit (NK PN-0802). Instructions for
running the recalibration routine are provided with the
Humidity Calibration Kit and may also be found at
http://www.nkhome.com/support/instructions/cali_kit_07.html.
SENSOR CALIBRATION
Pressure Sensor (Kestrel 2500 & 3500)
The Kestrel pressure sensor drift may be up to 1 mbar
over 12 months. For high-precision applications, we
recommend recalibration at 12-month intervals. If you
require calibration, please contact NK or a certified
calibration lab for options and pricing. The pressure sensor
may also be recalibrated in the field with reference to a
known-accurate and calibrated pressure standard. We do
not recommend simply recalibrating to a local weather
station as this may not be accurate for your location.
Instructions for recalibrating the pressure sensor may be
found at www.nkhome.com/kestrel/user-guides/
calibration_field.php.