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Kestrel

®

 4250 Racing Weather

®

 Tracker

7

Chart - Displays a graphical representation of up to 2000 stored data points for each measurement.  If there 

is no stored data, the axis will appear, but the chart will be blank. (See the following section for information 
on Chart Navigation.)     Modes use   and   
 

Navigation of Charts
The Kestrel 4250 is capable of storing up to 2000 data points for each measurement. To review the data, press 
the   button while viewing a chart. A cursor will appear on the most recent data point. Press the   and   

buttons to scroll through the data points. The date and time at which the data was stored will be displayed at 
the bottom of the screen, and the data value will be displayed at the top of the screen.  Hold down the   or 

 button to scroll quickly through the data points.

Press the   or 

 button to review the data for the other measurements. Please note that the cursor will 

remain at the same date and time.  If new data is stored while viewing chart data, the entire chart will shift left 

with the new data point charted on the right.  The cursor will not shift with the chart.
Press the   button to return to the Chart Mode.

Value

Chart

Cursor

Date & Time

NAVIGATION 

The  Kestrel  4250  is  set  up  to  display  9  Measurements  (some  are 

calculations) in 3 Modes. 
The  Measurements  are  listed  here  with  their  corresponding  screen 

icon. In addition to these Measurements and Modes, there are also 3 

User Screens (one is hidden in default mode), which simultaneously 

show  3  current  measurements,  and  the  Date  &  Time  Screen.  Use 

the   and 

 buttons to scroll through the various Measurements, 

followed by the 2 default User Screens and the Date/Time Screen. Any 

of  these  screens  can  be  turned  off  so  that  you  can  customize  your 

Kestrel  Meter  to  show  the  screens  that  your  application  requires. 

Additional  measurements  are  available.  (See  the  Measurements 

section in the Main Menu.)
The Modes are displayed below. Use the   and   buttons to scroll 

through the various Modes. From any mode, you may still scroll to a 

different Measurement by pressing the   and   buttons.
Current - Displays the instantaneous reading.

Min/Max/Avg - Displays the Minimum/Maximum/Average readings 

from stored data. If there is no stored data, the values will be displayed 

as --.-. 

      Measurements use   and   

Wind Speed

Temperature

Humidity

Water Grains /Moisture

Dew Point

Station Pressure

Density Altitude

Air Density

Relative Air Density

Hidden Functions:

Wind Chill

Heat Index

Wet Bulb

Barometric Pressure

Altitude

See measurements section on p.14 

to activate hidden functions

Содержание 4250

Страница 1: ...n Manual for Kestrel 4250 Racing Weather Tracker 4250 Racing Weather Tracker with Backlight In a hurry Be sure to read pages 5 7 to ensure that your Kestrel is setup properly www kestrelweather com 800 784 4221 Revised 07 29 10 ...

Страница 2: ...N Hold to turn power on or off Press to enter and exit Main Setup Menu IMPELLER Zytec V bearings on a user replaceable impeller IMPELLER COVER Swivel cover protects impeller when not in use DATA UPLOAD OPTICAL COUPLER Software and serial port interface sold separately BATTERY DOOR Sealed with o ring to keep product watertight TEMPERATURE SENSOR Hermetically sealed precision thermistor coiled to is...

Страница 3: ...n the thin end Using tweezers can help Battery Installation Use only AAA batteries Install batteries as indicated on the battery door After installing the batteries the Kestrel 4250 will automatically start in the Date and Time Setting mode See Date and Time Setup below Custom settings and chart data will be saved during a battery change only the date time and MMA values will be lost Turning the K...

Страница 4: ...te Time NAVIGATION The Kestrel 4250 is set up to display 9 Measurements some are calculations in 3 Modes The Measurements are listed here with their corresponding screen icon In addition to these Measurements and Modes there are also 3 User Screens one is hidden in default mode which simultaneously show 3 current measurements and the Date Time Screen Use the and buttons to scroll through the vario...

Страница 5: ...e Kestrel Meter has a high visibility green backlight which makes the display easily read in low light conditions Press the button to activate the backlight The light will remain activated for one minute Press the button within one minute to deactivate the light manually Relative Humidity The Kestrel Meter is capable of measuring RH to a high accuracy 3 RH between 5 and 95 To ensure operation with...

Страница 6: ...de reading to stabilize Note very small changes in pressure generate noticeable changes in altitude In order to provide meaningful readings for activities where altitude changes quickly the Kestrel Meter features rapid altitude response This is why the altitude readings tend to fluctuate by a few feet After obtaining a current altitude from the ALTITUDE screen move to the BARO screen and enter thi...

Страница 7: ...s of station pressure relative humidity and temperature and is not affected by the reference values entered in the BARO and ALTITUDE screens MAIN SETUP MENU You can customize your Kestrel Meter in multiple ways Press the button to access the Main Setup Menu Press the button to select the highlighted setting The Main Setup Menu contains OFF Memory Options Measurements Graph Scale Units User Screens...

Страница 8: ...ttings control the chart limits of your Kestrel Meter Depending on the conditions the lower and upper limits of the chart scale may need to be adjusted in order to get the best view of the data Highlight the desired measurement by pressing the or button Select the highlighted measurement by pressing the button Press the or button to increase or decrease the value of the limits Press the or button ...

Страница 9: ...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 ...

Страница 10: ... Monitoring In the Staging Lanes Auto Store On Store Rate 1 min Overwrite Off Man Store On These settings will allow you to track the conditions for more than 24 hours Measurements will be stored every minute and stop storing when the log is full This will let you review the data at your convenience To get the full use of the available memory be sure to clear data at the start of each race day MEM...

Страница 11: ... altitude at which you would be given the current air density Often used by individuals who tune high performance internal combustion engines such as race car engines Also of interest pilots in order to determine how an aircraft will perform Dewpoint The temperature to which air must be cooled in order for condensation to occur The difference between dewpoint and temperature is referred to as the ...

Страница 12: ... The cooling effect of combining wind and temperature The wind chill gives a more accurate reading of how cold it really feels to the human body The Kestrel Meter s wind chill is based on the National Weather Service standards as of November 1 2001 DEFAULT SETTINGS UNIT METRIC IMPERIAL Wind Functions M s mph Temperature Functions C F Barometric Pressure hPa inHg Altitude Functions M Ft Time Format...

Страница 13: ...fects your performance Period If you are not using something to measure the weather conditions then you are missing a piece of valuable information that can help you win races Environmental conditions such as relative humidity density altitude dewpoint and wind speed all influence your car By monitoring these conditions and analyzing how weather patterns from previous races change your car s perfo...

Страница 14: ...d readings will be restored to factory calibration What is the best way to take accurate temperature and humidity readings Avoid taking measurements in direct sunlight and be sure there is airflow over the sensors Especially if you expose the Kestrel Meter to a large temperature swing prior to taking a reading such as taking a Kestrel Meter from the indoors to the outdoors in the winter airflow ov...

Страница 15: ... 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 Pe...

Страница 16: ... expense of returning the unit If we require the product to be returned we will issue a Return Authorization to expedite the handling of your claim Visit www kestrelweather com for more information and pricing for these services Lifetime Customer Care Warranty NK wants you to be an NK customer for life so we take care of you even beyond the terms of the above warranty with our Customer Care Progra...

Страница 17: ...ther Meters are designed and manufactured in the USA by NIELSEN KELLERMAN 21 Creek Circle Boothwyn PA 19061 Phone 610 447 1555 Fax 610 447 1577 Web www kestrelweather com Email kestrel nkhome com Please register your Kestrel Meter at www KestrelWeather com ...

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