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15

15

Overwrite

(On/Off )

This setting only applies when the data 
log is full.  When On, oldest data point is 
discarded to allow memory for the new data 
point.  When Off, new data points are not 
saved.

Press

   or   

to toggle between 

On and Off.

Man Store

(On/Off )

When On, data is stored when the

 

 

button is pressed. When off, the

 

 

button 

is disabled.

Press

   or   

to toggle between 

On and Off.

*When unit is off , data is NOT stored for 2 sec and 5 sec Store Rates.

Measurements

Measurement screens can be turned off , or “hidden” from the normal measurement navigation. For 
example, if wind chill is not of interest, it can be hidden. Press the   or 

 button to toggle between ON 

and OFF for each individual measurement. Press the 

 or 

 button to highlight the desired measurement. 

Press the 

 button to return to the Main Setup Menu. Even when measurements are hidden, the Kestrel 

Meter will continue to log data for all measurements. If you wish to see the logged data for measurements 

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13

regularly. If you encounter an elevation landmark, you can adjust the reference pressure until the altitude 
matches the landmark elevation. This will correct the altitude for any pressure changes due to the weather. 
(Or, you can obtain an updated reference pressure from the sources described above.)

Some fi nal notes — If you wish to know the actual or station pressure for your location (such as for engine 
tuning), simply set the reference altitude on the BARO screen to “0”.  In this case, the Kestrel Meter will 
not make any adjustment and will display the measured value.  (Engine tuning and ballistics software 
sometimes refer to atmospheric or station pressure as “absolute pressure.”  These applications are 
concerned with the actual air density, as opposed to pressure gradients relating to weather, so barometric 
pressure is less useful.)

Also, the above discussion applies to ALL pressure altimeters, including one you may have in a watch or 
other device, but not to GPS altimeters, which use satellite triangulation to determine altitude. Note that 
with present GPS technology, pressure altimeters remain more accurate for measuring altitude change. 
This is why airplanes still rely on pressure altimeters, not GPS.

Finally, the DENSITY ALTITUDE screen is calculated from the absolute values of station pressure, 
relative humidity and temperature, and is not aff ected 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, System, Date & Time, Language and Restore.

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Kestrel

®

 4200 Pocket Air Flow

®

 Tracker

Humidity Ratio

Temperature, Dewpoint, Wet 
Bulb Temp, Wind Chill, & Heat 
Index

Pressure

Altitude, 
Density 
Altitude

Gpp grains per pound

G/kg grams per kilogram

°C Celsius

°F Fahrenheit

InHg inches 
mercury

HPa nectopascals

psi pounds per 
square inch

mb milibar

m meters

ft feet

Units

The units of measure can be adjusted to best suit the application. The following units are available:

Air Velocity

Air Flow

Dimensions

m/s meters per second

km/h kilometers per hour

kt knots

mph miles per hour

ft/m feet per minute

Bft Beaufort

Cfm  cubic feet per minute

M

3

/h cubic meters per hour

M

3

/m cubic meters per minute

M

3

/s cubic meters per second

L/s liters per second

Ft feet

Cm centimeters

M meters

In Inches

14

Kestrel

®

 4200 Pocket Air Flow

®

 Tracker

Off 

Press the 

 then the 

 button to turn the display off . Even when the Kestrel Meter’s display is turned 

off , the unit will continue to automatically store data at the defi ned Store Rate. The battery life will be 
decreased if data is stored frequently. The only way to completely shut off  the unit is to remove the 
batteries. Custom settings and data will be stored when the batteries are removed.

Memory Options

These settings control the data storage properties.

Setting

Description

Operation

Clear Log

(Go/Done)

All stored data is cleared. This will also clear 
Min/Max/Avg data.

Press   or   to clear the log.

Reset MMA

(Go/Done)

All Min/Max/Avg data is cleared. Chart data 
will remain intact.

Press   or   to clear the MMA.

Auto Store

(On/Off )

When On, data is automatically stored at 
preset Store Rate. When Off , data is only 
stored when manually captured with the 

  

button. 

Press   or   to toggle between 
On and Off .

Store Rate*

(2 sec – 12 hr)

The frequency at which data sets are 
automatically stored. (Battery life may be 
shortened if data is stored frequently.)

Press

   or   

to increase or 

decrease Store Rate frequency.

Summary of Contents for 4200

Page 1: ... 25 CUSTOMER SERVICE 27 Congratulations on the purchase of your Kestrel 4200 Pocket Air Flow Tracker The Kestrel 4200 is our newest and most comprehensive HVAC specific instrument It not only measures EVERY major environmental condition easily accurately and right in the palm of your hand but now also automatically calculates Volume Air Flow CFM and Humidity Ratio grains While the Kestrel 4200 is ...

Page 2: ...r 8 Kestrel 4200 Pocket Air Flow Tracker SPECIAL FUNCTIONS User Screens The Kestrel Meter has three User Screens that can be customized to display three current measurements simultaneously These screens can also be turned off See the Main Menu section for setup instructions Max Avg for Air Flow Air Velocity Wind Chill The Max Avg values for Air Flow Velocity and Wind Chill are measured independent...

Page 3: ...t Air Flow screen simply press the 12 Kestrel 4200 Pocket Air Flow Tracker Starting with a known altitude for your location You can obtain your altitude from a topographical map or local landmark Google Earth is an excellent free program that provides the exact altitude for any given address www earth google com Set this value as your reference altitude on the BARO screen to determine your baromet...

Page 4: ...DENSITY ALTITUDE screen is calculated from the absolute values 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 O...

Page 5: ...ocket Air Flow Tracker APPLICATION EXAMPLES This section provides examples of applications where a Kestrel Meter might be used and the appropriate memory settings HVAC Environmental Monitoring Auto Store On Store Rate 5 min Overwrite On Man Store Off These settings will record conditions every five minutes for a total storage of almost 7 days You can monitor the conditions in a laboratory or manuf...

Page 6: ...s available for a more in depth definition On the internet visit www usatoday com or www noaa gov Or locate the USA Today publication The Weather Book Please note that any words in a definition printed in italics are themselves defined in this glossary 24 Kestrel 4200 Pocket Air Flow Tracker Some exercise physiology guides use wet bulb temperature rather than heat index as a measure of the safety ...

Page 7: ...ill be but for the most accurate readings at your particular location the Kestrel Meter is better CUSTOMER SERVICE Kestrel Pocket Weather Meters Warranty NK does not believe in disposable electronics We know that Kestrel Meters don t typically lead pampered lives and we design them for years of performance in tough conditions Every Kestrel Meter is designed and manufactured at NK s facility in Boo...

Page 8: ...s within 30 days of purchase and we will test and recalibrate all values at no charge Beyond 30 days we offer reasonably priced tests calibration services and N I S T certified calibrations as well as Kestrel Meter tune ups All of our measurements are traceable to the National Institute of Standards and Technology ensuring the highest level of accuracy Our primary Calibration Standards are sent fo...

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