Kestrel 4500 User Manual

11
This allows the user to start and stop the averaging period in the most appropriate manner for their
application. Averaging on all wind-related values (Wind Speed, Crosswind, Headwind and Wind Chill)
will be started and stopped together.
While viewing the Min/Max/Avg screen for any of these measurements, hold the unit into the wind, and
press the button when the screen displays “--average” to begin collecting data for all measurements,
and again when the screen displays “--stop” to stop collecting data and hold the values on the
display. Press the button when the screen displays “--clear” to clear the data. This routine will work
simultaneously for all measurements, regardless of which one is displayed while the routine is run. The
Max/Avg for these wind values will not aect any other Min/Max/Avg or stored data.
Manual Data Storage
To manually store data, press the button. One of the following will appear: Data Stored (data has
been captured and will appear on chart), Full (Overwrite is o and data log is full), or O (Manual Store
button has been disabled). (See the Main Setup Menu section for more information on memory.)
Backlight
The Kestrel Meter has a high-visibility green backlight, which makes the display easily read in low-light
conditions.The Kestrel 4500 NV has a night-vision preserving backlight which helps users to sustain
natural night vision. The NV’s backlight incorporates an optical lter to reduce overall brightness and
minimize blue and green spectrum light to preserve night vision. Additionally, the backlight is much
dimmer than a standard backlight, making it more dicult to detect with the naked eye in night
operations. This backlight appears soft greyish pink (not red) and is still in the visible spectrum, so it is
not compatible with night-vision equipment.
It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a
short burst of white, yellow, green or blue light “bleaches out” the rod cell photoreceptors in the eye

Kestrel 4500 Specifications

General

Brand	Kestrel
Product Category	Weather Station
Barometric Pressure Range	750 to 1100 mbar
Compass	Yes
Waterproof	Yes
Floats	Yes
Water Resistance	IP67
Data Logging	Yes
Wind Speed Range	0.6 to 40 m/s
Temperature Range	-29 to 70°C (-20 to 158°F)
Battery Life	Approximately 400 hours
Measures	Wind speed, temperature, humidity, pressure
Heat Stress Index Range	0 to 55 °C
Accuracy	Wind speed: ±3%, Temperature: ±1°C, Humidity: ±3%, Pressure: ±1.5 mbar
Resolution	Wind Speed: 0.1 mph/m/s/km/h/ft/s/knot, Temperature: 0.1 °F/°C, Humidity: 0.1 %, Pressure: 0.1 mbar
Operating Temperature	-29 to 70°C (-20 to 158°F)
Battery Type	2 x AAA
Display	High-contrast, sunlight-readable
Dimensions	122 x 46 x 18 mm