Wind Speed
Functions
Operating Modes: Moving 3-second
average (), maximum 3-second gust since power on (MAX) or average
since power on (AVG).
Display Update: 1 second.
Units: Knots (KT), meters per second (M/S), kilometers per
hour (KM/H), miles per hour (MPH), feet per minute (FPM) and
Beaufort force (B).
On-Axis Accuracy: greater of +/- 3% or +/- least significant
digit.
Off-Axis Response: -1% @ 5º, -2% @ 10º, -3% @ 15º.
Resolution and Range: KT, M/S, KM/H or MPH: resolution 0.1;
max display range 199.9.
FPM: resolution 1.0 below 1,999, 10 above
2,000(auto-ranging); max display range 19,990.
Calibration Drift: < 2% after 100 hours use at 7 M/S (~14
KT, 25 KM/H, 16 MPH or 1,400 FPM).
Minimum - Maximum Speed: 0.3 M/S (~0.6 KT, 1 KM/H, 0.7 MPH or
60 FPM) to 40 M/S (~78 KT, 144 KM/H, 89 MPH or 7,830 FPM).
Weather Functions:
Operating Modes: Temperature; wind chill;
relative humidity; heat index; dew point temperature.
Units: Degrees Centigrade (ºC) or degrees Fahrenheit (ºF).
Accuracy: Temperature and wind chill, +/- 1.0ºC; relative
humidity +/- 3%; dew point temperature, +/-2ºC; heat index,
+/-3ºC. Humidity sensor can be recalibrated in the field.
Temperature/Wind Chill Display Update: 1 second.
Humidity Sensor Response Time: 1 minute.
Resolution: 0.1.
Environmental
Specifications
Sealing: Electronics enclosure IP67 -
water resistant to 1 m. (3 ft.). Floats.
Shock: Drop tested to 2 m. (6 ft.).
Operating Temperature: LCD readability is lost above 50ºC
(122ºF) and below -15ºC (5ºF). Accurate readings may be taken
beyond these temperature limits by exposing the unit for the minimum
time necessary to take and record measurement.
Storage Temperature: Recommended -20ºC to 80ºC (-4ºF to
176ºF).
Physical Buttons: Two sealed tactile rubber buttons control
all functions.
Auto Shutdown: 30 minutes after last key press.
Battery: User-replaceable CR2032 coin cell. Typical life, 400
hrs.
Impeller: 25 mm (1 in.) diameter, sapphire bearings, light
weight. User-replaceable without tools.
Temperature Sensor: Hermetically sealed precision thermistor.
Humidity Sensor: Silicon based capacitive sensor.
Physical Specifications
Display: Reflective 3 1/2 digit LCD, 9 mm
(0.36 in.) digit height.
Case: Slip-on hard case.
Dimensions: 122 x 42 x 14 mm (4.8 x 1.7 x 0.6 in.); case, 117
x 46 x 19 mm (4.6 x 1.8 x 0.7 in.); lanyard, 0.5 m. (10 in.).
Weight: Unit, 44 g. (1.6 oz.); case, 23 g. (0.8 oz.).
Temperature Limitations:
The Kestrel temperature sensor is able to measure temperatures as
low as -30C (-22F) and as high as 70C (158F). The sensor and
electronics simply won't measure beyond this range. The Kestrel is
able to display wind chill measurements lower than -30C, depending
on wind conditions. It is also able to display heat index
measurements above 70C, depending on humidity conditions.
Furthermore, the Kestrel display will not function if the display
itself gets below -15C. However, if the unit is kept in a pack or
pocket or other warm area, the display itself should not get this
cold. In other words, try not to leave the Kestrel outside in
temperatures below -15C.
Full
one-year warranty on entire system, covering manufacturing defects.
