Kestrel 4250 (Racing) - Manual (Page 9)

Kestrel ® 4250 Racing Weather ® Tracker
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Pressure Adjustment section for instructions). Then adjust the calibrating setting on the Baro Cal screen to
the known mean sea level barometric pressure. If recalibration is desired, the unit may also be returned to
NK for service.
Humidity Cal - Recalibration of this sensor is not typically required, and it is not recommended that you
recalibrate without speaking to an NK technician. The humidity sensor can be calibrated by “teaching” it the
correct humidity. Some special equipment is required for this calibration, including two hermetically sealed
containers and saturated salt solutions. NK offers a calibration kit, and instructions are available on
www.nkhome.com. If recalibration is desired, the unit may also be returned to NK for service.
Date & Time
The date and time, as well as date and time formats, can be adjusted. The Time Formats available are 12
hour and 24 hour. The Date formats available are day/month/year and month/day/year. (See the Date and
Time Set Up section for instructions.) Press the button to return to the Main Setup Menu.
Language
Displayed text can be set in one of five languages: English, French, German, Italian or Spanish. To choose
a language, use the or buttons to highlight the desired language. Press the button to select the
language and return to the Main Setup Menu. Otherwise, press the button to return to the Main Setup
Menu without changing languages.
Restore
Default settings for units of measure, date and time formats, and system settings can be restored. (See the
Factory Default Settings section for more information.) Press the or button to highlight the desired
default setting: Metric, Imperial or Defaults. Press the or button to reset the factory setting. Press the
button to return to the Main Setup Menu.
User Screens
The three User Screens can be reconfigured to display the most appropriate information for your
application. For example, if you need to monitor the wind speed, humidity and barometric pressure, a User
Screen can display these current measurement values on the same screen for quick reference. Only current
measurements can be selected for the User Screens — Min/Max/Avg and Charts are not available.
Highlight the desired User Screen by pressing the or button. Press the button to select the
highlighted User Screen. Press the or buttons to change lines, and the or button to scroll
through the available measurements for each highlighted line. Press the button to return to the User
Screen Setup Menu. Repeat above process for the other User Screens or press the button to return to
the Main Setup Menu. The User Screens may also be hidden if not needed.
System
The display Contrast and Auto Shutdown can be reconfigured as required. The relative humidity and
pressure sensors can also be recalibrated. Press the or buttons to highlight the appropriate selection,
and the or button to adjust or select.
The Contrast can be adjusted for better visibility depending on the ambient lighting conditions. Press the
or button to increase or decrease the contrast from 0 to 20 (0 is lightest, 20 is darkest).
The display can be set to automatically turn off in order to conserve the battery life. Auto Shutdown will
only occur after the preset time has elapsed without any button presses. Press the or button to scroll
through the Auto Shutdown options (15 minutes, 60 minutes, Off). Battery life will be shortened if the Auto
Shutdown is turned to Off.
Baro Cal - Recalibration of this sensor is not typically required, and it is not recommended that you recalibrate
without speaking to an NK technician. The pressure sensor can be calibrated if necessary. It is extremely
important to know the precise altitude and mean sea level barometric pressure at the time of calibrating
the sensor. First, set the reference altitude on the BARO measurement screen to the known altitude (see