Kestrel 4100 Quick Start Manual

Kestrel® 4100 Pocket Air Flow Tracker

Quick Start

Please review the manual for more in-depth instructions and
information about setup options.

Insert the 2 AAA batteries as indicated on the battery door.

After the Introduction Screen appears for 3
seconds, the Date/Time Setup Screen will
appear. Set the correct date and time using
and to adjust, and and to scroll.

Press to exit the Date/Time Setup.
Press again to exit the Main Menu.

The Date and Time Screen will appear.

Press to scroll to the Current Velocity
Screen.

Press to scroll to the Current Air Flow
Screen.

Continue pressing for current readings of: Temperature, Wind
Chill, Humidity, Heat Index, Dewpoint, and User Screens 1, 2 & 3,
which show three measurements you choose in the setup menu.
Press to scroll through these screens in reverse order.

While viewing any of the Current Measurement
Screens, press to view the Min/Max/Avg for
the measurement. If there is no stored data,

--.- will appear.

Press to view the Chart Screen for the
measurement. If there is no stored data, the
axis will appear but the chart will be blank.

The factory setting for storing data, to be displayed on the  
Min/Max/Avg and Chart screens, is once per hour. You may
choose a different interval in the setup menu.

Press to return to the Min/Max/Avg and Current Screens. From 
either Min/Max/Avg or Chart Screen, press or to see  
Min/Max/Avg or Chart Screen for the other measurements.

Air Flow

The Kestrel 4100 will display the volume air flow, based on the
instantaneous air velocity and cross-sectional area of the
opening through which the air is passing.

To set the dimensions of the duct or
opening, press the button while viewing
the AIR FLOW screen. The DIMENSIONAL
SETTING screen will appear with the word
SHAPE highlighted.

The shape of the opening can be selected by pressing the or
button. The options are round or rectangular openings. Press the 
button to highlight the dimensional settings. For round
openings, simply set the correct diameter of the opening. Use
the and buttons to increase and decrease the value. Holding
these buttons will increase and decrease the value quickly. For
rectangular openings, set both the length and the width of the
opening.

When the dimensional settings are correct, press the button to
exit the DIMENSIONAL SETTING screen and return to AIR FLOW
screen. Place the Kestrel 4100 in the duct air flow. The displayed
air flow value will be the result of multiplying the instantaneous
air velocity measured by the Kestrel 4100 by the area of the
programmed opening.

You may change the dimension setting and airflow units in the
Main Setup Menu.

When the Chart Screen is displayed, press to view the details of 
the chart data. A cursor will appear on the most recent data  
point. The date and time of storage will be displayed below  
the chart, and the data value will be displayed above the chart. 
If there is no stored data, only the cursor and the axis will  
appear.

Press or to review the data points.
Hold or to quickly scroll through
the data.

Press or to view the data for the other measurements at the 
same date and time.

Press to return to the normal Chart Screen.

Press to illuminate the backlight for one minute.
Press to manually store data.
Press to enter the Main Setup Menu.
Hold for 2 seconds to turn the unit off.

Value
Cursor

Chart
Date &

Time