Kernel 4000 User manual

Kestrel®4000
Pocket Weather™Tracker™
Instruction Manual
NK
Kestrel® 4000 Pocket Weather™Tracker™
FRONT
2
MANUAL MEMORY BUTTON
Press to manually store current
conditions to memory.
MEASUREMENT BUTTONS
Press to scroll between screens:
Date/Time, Measurements,
User Defined Screens
POWER/SETUP BUTTON
Hold to turn power on or off. Press
to enter and exit Main Setup Menu.
BACKLIGHT BUTTON
Press to activate
backlight
for 1 minute.
COMMAND BUTTON
In Chart Screens, press
to view data points.
In Setup Menus, press
to make selection.
MODE BUTTONS
Press to change mode of
measurements: Current,
Min/Max/Avg, Chart.
BACK
TEMPERATURE SENSOR
Hermetically sealed
precision thermistor.
HUMIDITY SENSOR
Capacitive sensor.
PRESSURE SENSOR
Monolithic silicon
piezoresistive sensor.
IMPELLER
Sapphire jewel 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.
SERIAL NUMBER
2 AAA BATTERIES
3
Kestrel® 4000 Pocket Weather™Tracker™
Getting Started
Pouch and Lanyards 5
Battery Installation 5
On/Off 5
Date and Time Set Up 5
Screen Navigation
Measurements and Modes 6-7
Charts 7
Special Functions
User Screens 8
Wind Speed/Chill Averaging 8
Accurate Humidity Readings 8
Barometer/Altimeter Adjustments 8
Manual Data Storage 9
Backlight 9
Main Setup Menu 10-12
Application Examples 13-14
Memory Capabilities 14
Glossary 15
Factory Default Settings 16
PC Upload 16
Specifications 17-19 4
Congratulations on the purchase of your Kestrel 4000 Pocket Weather Tracker! The Kestrel 4000 is the next
generation of weather monitoring. Now, you can instantly measure EVERY major environmental condition easily,
accurately, and right in the palm of your hand.
While the Kestrel 4000 is user-friendly and simple to use (and the Quick Start Card will help get you started),
reading the instruction manual is recommended in order to use the Kestrel 4000 to its fullest potential.
NK, manufacturer of Kestrel Pocket Weather Meters,is available to answer questions and provide support. Contact
NK by phone: [phone], fax: [phone], email: [e-mail], or web: www.nkhome.com.

Pouch and Lanyards
Wrist and neck lanyards and a small pouch have been provided. To install
the lanyard, feed the thin end of the lanyard around the metal post on
the battery door (as shown in diagram). Feed the thick end of the lanyard
through the loop on 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 4000 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 Kestrel 4000 ON and OFF
ON: Press the button.
OFF: Hold the button for two seconds. Or, press the button, then press the button with the
word OFF highlighted. (Note: your unit will continue to automatically store data when the power is
turned off.)
Date and Time Setup
The first time that you turn on your Kestrel 4000, as well as after a battery change,
you will need to set the date and time. The Introduction Screen will appear for 3
seconds, followed by the Date/Time Setup Screen. Press the and buttons to
scroll through the settings. Press the and buttons to scroll through the
setting options. After entering the date and time, press the button to exit the
Date/Time Setup. Then press the button again to exit the Main Setup Menu. 56
The Kestrel 4000 is set up to display 10 Measurements (some are actually
calculations) in 3 Modes.
The Measurements are listed to the right with their corresponding screen
icon. Use the and buttons to scroll through the various Measurements.
The Modes are:
Current - displays the instantaneous reading
Min/Max/Avg - displays the Minimum/Maximum/Average readings from
stored data
Chart - displays a graphical representation of up to 480 stored data points
Examples of each of these screens are shown below. Use the and buttons
to scroll through the various Modes.
In addition to these Measurements and Modes, there are also 3 User Screens, which simulta-
neously show 3 current measurements (see pages 8 and 11 for more information); and the Date
& Time Screen, which gives the current date and time.
Modes use
Current Min/Max/Avg Chart
Measurements
use
Wind Speed
Temperature
Wind Chill
Humidity
Heat Index
Dew Point
Wet Bulb
Altitude
Density
Altitude
HI
DP
WB
Barometric
Pressure
D
Navigation of Charts
The Kestrel 4000 is capable of storing up to 480 data points. To review
the data, press the button while viewing a chart. A cursor will appear
on the most recent data point. Press the button to scroll through
older data points and the button to scroll through more recent data
points. The date and time at which the data was stored will be displayed
at the bottom of the screen. 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.
Mode Navigation
While in a Current Screen, press the
button to view the Min/Max/Avg for a
measurement. If there is no stored
data, the values will be displayed as --.-
Press the button again to view a
chart for the measurement. If there is
no stored data, the axis will appear, but
the chart will be blank.
Press the button to return to the Min/Max/Avg and
Current Screens. From either Min/Max/Avg or Chart
Screen, press the or button to scroll through the
Min/Max/Avg or Chart Screen for the other
measurements.
Measurement Navigation
Starting on the Date & Time Screen…
…Press the button to scroll to the
Current Wind Speed Screen.
Press the button again to scroll to
the Current Temperature Screen.
Continue pressing the button to scroll through
the Current Measurement Screens, listed on the
previous page, followed by the 3 User Screens. Press
the button to scroll through these screens in
reverse order.
7
Value
Chart
Cursor
Date & Time
User Screens
The Kestrel 4000 has three User Screens which can be customized to display three current
measurements simultaneously. (See page 11 for setup instructions.)
Min/Max/Avg for Wind Speed and Wind Chill
The Min/Max/Avg values for Wind Speed and Wind Chill are measured independently from the stored and charted data. While viewing
the Min/Max/Avg screen for either Wind Speed or Wind Chill, press the button when the screen displays “--average”to begin
collecting data for both measurements. Press the button 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
both measurements, regardless of which one is displayed while the routine is run. The Min/Max/Avg for Wind Speed and Wind Chill
will not affect any other Min/Max/Avg or stored data.
RelativeHumidity
The Kestrel 4000 is capable of measuring RH very accurately (+/- 3% RH). However,there are a number of circumstances that can reduce
the Kestrel 4000’s ability to perform within these specifications:
• Direct sun will heat the air inside the humidity sensor enclosure and cause inaccurate readings. Keep the Kestrel 4000 in the shade
when taking RH measurements.
• Rapid large temperature changes,such as when taking a Kestrel stored inside at 70°F outside to a temperature of 40°F,can require
as long as 30 minutes to for the temperature inside the RH enclosure to match the temperature outside, permitting the unit to provide
accurate RH readings. Any air flow over the RH sensor enclosure, even as low as 2 mph, significantly speeds up the response time.
When taking measurements under conditions where there is a significant change in temperature (more than 2C or 4F) be sure to allow
enough time for the RH value to stabilize. The greater the temperature change,the greater the time. You can use the logging capability
of the K4000 to confirm that the unit has stabilized to a correct reading: Set the memory options to a relatively short logging interval
(20 seconds works well, see page 10 for instructions), select the graphical display of RH, and you can see when the value is no longer
changing significantly. At that point, the RH value is stable and can be relied upon to be within the accuracy specifications.
Barometric Pressure and Altitude Adjustment
The Kestrel 4000 will measure station pressure in order to calculate barometric pressure and altitude. Changes in either air pressure
or altitude will affect these readings, so it's important to make adjustments as necessary.
First, you will need to obtain either (a) the current barometric pressure or (b) the altitude of your location. You can obtain your current
barometric pressure by contacting a local airport or weather service. Set this value as your reference pressure on the ALTITUDE screen
to determine your altitude. Otherwise, you can obtain your altitude from a topographical map or local landmark. Set this value as your
reference altitude on the BARO screen to determine your barometric pressure. 8

There are two basic examples for when and how to use the BARO and ALTITUDE screens. First,assume that you know the altitude from
one of the sources above. Set the reference altitude on the BARO screen to this elevation. As long as you remain at home, you can
accurately track changes in the barometric pressure.However,the measurement on the ALTITUDE screen also changes. This value will
fluctuate as pressure fronts pass through your location. Since you know your house is not changing elevation, you can ignore this screen.
Now let’s assume that you are planning a day hike,and you’d like to track your altitude. Before starting,you’ll need to adjust the reference
pressure on the ALTITUDE screen. You can do this by simply adjusting the reference pressure until you reach the elevation of your
house. The reference pressure will be the same as the pressure reading on the BARO screen. You can now track the altitude changes
as you hike. You can ignore the values on the BARO screen,since the pressure changes are predominantly due to changes in elevation.
As with all altimeters, it must be assumed that any change in pressure due to weather is small over the course of one day. If you were
to 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.
Altitude Adjustment
Obtain a barometric pressure reading from a local weather source to use as your reference
pressure. From the Current Altitude Screen, press the button to enter the adjustment
mode. Press the button to increase the reference pressure or the button to decrease
the reference pressure. You will notice that the Altitude will change with changes in the
reference pressure. Press the button to exit the adjustment mode.
Pressure Adjustment
Obtain your altitude from a topographical map or landmark to use as your reference altitude.
From the Current Barometric Pressure Screen, press the button to enter the adjustment
mode. Press the button to increase the reference altitude or the button to decrease
the reference altitude. You will notice that the Barometric Pressure will change with
changes in the reference altitude. Press the button to exit the adjustment mode.
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 off and data log is full), or Off (Manual Store button has been disabled). See page 10 for more information
on Memory.
Backlight
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.
910
You can customize your Kestrel 4000 in multiple ways. Press the button to access the Main Setup Menu.
Press the button to select the highlighted setting.
Off - Press the or the button to turn the display off. Even when the Kestrel’s display is turned off, the unit
will continue to automatically store data at the defined Store Rate. Wind speed will NOT be stored when the unit
is off.To continously measure wind speed,turn the auto shutdown off (pg.12).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. Press the button to return to the
Main Setup Menu.
Setting Description Operation
Clear Log All stored data is cleared.This will also clear Min/Max/Avg data. Press or to clear the log.
(Go/Done)
Reset MMA All Min/Max/Avg data is cleared. Chart data will remain intact. Press or to clear the MMA.
(Go/Done)
Auto Store When On,data is automatically stored at preset Store Rate. When Press or to toggle
(On/Off ) Off, data is only stored when manually captured with the button. between On and Off.
Store Rate* The frequency at which data sets are automatically stored. Press or to increase or
(2 sec - 12 hr) (Battery life may be shortened if data is stored frequently.) decrease Store Rate frequency.
Overwrite This setting only applies when the data log is full. Press or to toggle
(On/Off ) When On, oldest data point is discarded to allow memory for between On and Off.
the new data point. When Off,new data points are not saved.
Man Store When On,data is stored when the button is pressed. Press or to toggle
(On/Off ) When off, the button is disabled. between On and Off.
* When unit is off, data is NOT stored for 2 sec and 5 sec Store Rates.
11
Measurements - Measurement screens can be 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.
Graph Scale - These settings control the chart limits of your 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 to
change between the upper and lower limits. Press the button to exit and return to the measurement selec-
tion screen. Press the button to return to the Main Setup Menu.
Units - The units of measure can be adjusted to best suit the application. The following units are available:
Wind Speed Temperature, Pressure Altitude,
m/s meters per second Dewpoint,Wet inHg inches mercury Density Alt.
km/h kilometers per hour Bulb Temp, Wind hPa hectopascals m meters
kt knots Chill & Heat Index psi pound per ft feet
mph miles per hour °C Celsius square inch
ft/m feet per minute °F Fahrenheit mb millibar
Bft Beaufort
Highlight the desired measurement by pressing the or button. Press the or button to scroll through
the available units. 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 the
application. 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 and 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.
12
System - The display Contrast and Auto Shutdown can be reconfigured as required. The relative humidity and
pressure sensors can also be recalibrated. Press the and 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 ).
Baro Cal - The pressure sensor can be calibrated if necessary. It is extremely important to know the precise altitude
and mean sea level barometricpressure at the time of calibrating the sensor. First, set the reference altitude on
the BARO measurement screen to the known altitude (see Pressure Adjustment on page 9). Then adjust the
calibrating setting on the Baro Cal screen to the known mean sea level barometric pressure. Recalibration of this
sensor is not typically required, and it is not recommended that you recalibrate without speaking to an NK
technician.
Humidity Cal - 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. Recalibration of this sensor is not typically
required, and it is not recommended that you recalibrate without speaking to an NK technician.
Press the button to return to the Main Setup Menu.
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 page 5 for
instructions on how to set the date and time. ) 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 and 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
page 17 for a list of the default settings.) 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 to return to the Main Setup
Menu.

Soaring/Hang Gliding
Auto Store On
Store Rate 2 min
Overwrite Off
Man Store On
These settings will allow you to track all conditions for
16 hours. Chart your altitude changes, watch how the
temperature and humidity vary with altitude, and log
your apparent speed. Data will no longer be stored
once the log is full,in order to preserve it until it can be
reviewed later. Be sure to clear the data log just before
your flight.
Skydiving
Auto Store On
Store Rate 2 sec
Overwrite Off
Man Store Off
These settings will allow you to record a detailed
account of your jump. Be sure to clear the data log just
before jumping. As you descend toward the ground,
you will be tracking the altitude every two seconds, as
well as the conditions at that altitude. The chart will
clearly show the point at which the parachute opens,
as well as the point you get back on the ground.
13
This section provides examples of applications where a Kestrel 4000 might be used, and the appropirate
memory settings.
Weather Monitoring
Auto Store On
Store Rate 1 hr
Overwrite On
Man Store Off
These settings will allow you to track conditions for
20 days. When the memory is full, each new measure-
ment will be stored in place of the oldest data point.
The charts will provide a quick look at the recent
weather conditions. Keep an eye out for falling baro-
metric pressure, which indicates a storm is coming.
Hiking/Camping for the Weekend
Auto Store On
Store Rate 20 min
Overwrite Off
Man Store On
These settings will allow you to track the conditions for
almost 7 days. Measurements will be stored every 20
minutes, and stop storing when the log is full. This will
let you review the trip at your convenience when you
return. You can also manually store the conditions, in
case you get caught in 40 mile per hour winds or make
it to the top of a mountain. For more detailed informa-
tion on your trip, set the Store Rate to 2 hours over-
night, and 10 minutes during the day. 14
Store Rate Total Memory
2 sec 16 min
5 sec 40 min
10 sec 1 hr, 20 min
20 sec 2 hr, 40 min
30 sec 4 hr
1 min 8 hr
2 min 16 hr
5 min 1 day, 16 hr
HVAC - Environmental Monitoring
Auto Store On
Store Rate 5min
Overwrite On
Man Store Off
These settings will record conditions every five
minutes, for a total storage of almost 2 days. You can
monitor the conditions in a laboratory or manufac-
turing plant, both day and night, to determine if the
climate control is working properly. Or you can exam-
ine the effect on the environment when employees
enter and exit the building.
Store Rate Total Memory
10 min 3 days, 8 hr
20 min 6 days, 16 hr
30 min 10 days
1 hr 20 days
2 hr 40 days
5 hr 100 days
12 hr 240 days
HVAC/R - System Balancing
Auto Store Off
Store Rate —
Overwrite Off
Man Store On
These settings will require you to press the Manual Store
Button in order to store any data at a duct, hood, vent,
or other air system. The meter will not store any data
automatically. Be sure to record the location and
date/time of storage for reference when reviewing the
data. After storing the conditions at each location,
simply review the data and balance the system.
15
The below definitions have been greatly simplified in order to keep this section brief. We strongly recommend that anyone who wishes
to make use of these measurements refer to one of the many excellent weather references available for a more in-depth definition.
On the internet,visit www.usatoday.com or www.noaa.gov. Or,locate the USAToday publication, TheWeather Book. Please note that
any words in a definition printed in italics are themselves defined in this glossary.
Altitude: The distance above sea level. The Kestrel 4000 calculates altitude based on the measured station pressure and an assumed or
known barometric pressure.
Barometric Pressure: The air pressure of your location reduced to sea level. Pressure will change as weather systems move into your
location. Falling pressure indicates the arrival of a low pressure system and expected precipitation or storm conditions. Steady or rising
pressure indicates clear weather.
Density Altitude: The altitude at which you would be, given the current air density. Often used by pilots in order to determine how an
aircraft will perform. Also of interest to individuals who tune high performance internal combustion engines, such as race care engines.
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“temperature/dew point spread”. A low dewpoint spread indicates high relative humidity,while a large
dewpoint spread indicates dry conditions.
Heat Index: A practical measure of how hot the current combination of relative humidity and temperature feels to a human body.
Higher relative humidity makes it seem hotter because our ability to cool ourselves by evaporating perspiration is reduced.
Relative Humidity: The amount of water vapor actually in the air divided by the maximum amount of water vapor the air could hold at
that temperature, expressed as a percentage.
Station Pressure: The air pressure of your location, NOT reduced to the sea level equivalent.
Temperature:The ambient air temperature.
Wet BulbTemperature:The lowest temperature to which a thermometer can be cooled by evaporating water into the air at constant
pressure. This measurement is a holdover from the use of an instrument called a sling psychrometer.To measure wet bulb temperature
with a sling psychrometer, a thermometer with a wet cloth covering over the bulb is spun rapidly through the air. If the relative humidity
is high, there will be little evaporative cooling and the wet bulb temperature will be quite close to the ambient temperature. Some
exercise physiology guides use wet bulb temperature, rather than heat index, as a measure of the safety of exercise in hot and humid
conditions.
Wind Chill: 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 4000’s wind chill is based on the National Weather Service standards as of November 1,2001. 16
SETTING FACTORY DEFAULT
Automatic Data Store On
Data Store Rate 1 hour
Data Overwrite On
Manual Data Store On
User Screen1 wind speed, temperature, humidity
User Screen 2 humidity, dewpoint, wet bulb
User Screen 3 pressure, altitude, density altitdue
Display Contrast 10
Automatic Shutdown 15 minutes
Language English
UNIT METRIC IMPERIAL
Wind Functions m/s mph
Temperature Functions °C °F
Barometric Pressure hPa inHg
Altitude Functions m ft
Time Format 24 hour 12 hour
Date Format day/month/year month/day/year
Stored data may be uploaded to a PC with the optional Kestrel PC Interface, NK part number 0830.

Nielsen-Kellerman
610.447.1555
www.nkhome.com
[email protected]
Instruction Manual for Kestrel 4000 version: 4.02 ALL
19
18
17
Measurement Units Operational
Range Resolution Accuracy
(+/-)
Specification
Range
Response Time
Wind Speed MPH 0.8 to 135.0 0.1 0.8 to 89.0 MPH
1 second f
p
m59 to 11,948 1 59 to 7877 f
p
m
Knots 0.6 to 118.3 0.1 0.6 to 78 Knots
Beaufort 0 to 12 1 0 to 12 B
m/s 0.4 to 60.0 0.1 0.4 to 40.0 m/s
KPH 1.0 to 218.0 0.1 1.0 to 144 KPH
Temperature °F -50.0 to 260.0 0.1 1.8 °F -20 to 158 °F
1 minute °C -45.0 to 125.0 0.1 1°C -2 to 70 °C
Relative Humidity %RH 0.0 to 100.0 0.1 3.0 %RH
1 minute
Pressure inHg 8.86 to 32.48 0.01 0.05 inHg At 77°F, <19,700 ft
1 second hPa/mb 300.0 to 1100.0 0.1 1.5 hPa/mb At 25 °C, <6,000 m
PSI 4.35 to 15.95 0.1 0.02 PSI At 77°F, <19,700 ft
3% of
reading
1 inch diameter impeller with precision axle and sapphire bearings, individually tested in NIST-traceable wind tunnel. Calibration drift < 1%
after 100 hours use at 16 MPH / 7 m/s. Sustained operation above 60 MPH / 27 m/s will wear impeller rapidly and may cause destruction of
impeller. Replacement impeller, PN-0801, may be field-installed without tools (US Patent 5,783,753).
Thermally isolated, hermetically sealed, precision thermistor mounted externally (US Patent 5,939,645). Calibration drift negligible.
Polymer capacitive humidity sensor mounted in thin-walled chamber external to case for rapid, accurate response (US Patent 6,257,074).
Response specification is time to achieve 95% or better of stated accuracy. Calibration drift +/- 2% over 24 months. Relative humidity may be
recalibrated at factory or in field using Kestrel Humidity Calibration Kit, PN-0824.
Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Maximum error beyond specified temperature,
+/- 0.09 inHg / 3.0 hPa. Calibration drift typically -0.03 inHg / -1.0 hPa per year. Pressure sensor may be recalibrated at factory or in field
(facilitated by Kestrel Computer Interface, PN-0830).
5 to 95 %
non condensing
Measurement Units Operational
Ran
g
eResolution Accuracy (+/-) Specification Range
Wind Chill °F 0.7 to 135.0 MPH, -49.0 to 257.0 °F 0.1 1.8 °F 1.8 to 89 MPH, -20 to 158 °F
1 second °C 0.4 to 60.0 m/s, -45.0 to 125.0 °C 0.1 1 °C 0.4 to 40 m/s, -29 to 70 °C
Dewpoint °F 0.0 to 100% RH, -49.0 to 257.0 °F 0.1 3.6 °F -20 to 158 °F, 20 to 95% RH
1 minute °C 0.0 to 100.0 %RH,
-45.0 to 125.0 °C 0.1 2 °C -29 to 70 °C, 20 to 95 %RH
Heat Index °F 0.0 to 100% RH, -49.0 to 257.0 °F 0.1 3.6 °F 70.0 to 130.0 °F, 0 to 100% RH
1 minute °C 0.0 to 100.0 %RH,
-45.0 to 125.0 °C 0.1 2 °C 21.1 to 54.4 °C, 0 to 100% RH
Wet Bulb °F
-49.0 to 257.0 °F,
0.0 to 100.0 %RH,
8.86 to 32.48 inHg
0.1 3.6 °F 32 to 100 °F, 5 to 95% RH,
8.86 to 32.48 inHg, <19700 ft
1 minute °C
-45.0 to 125.0 °C,
0.0 to 100.0 %RH,
300.0 to 1100.0 hPa
0.1 2 °C 0 - 37 °C, 5 to 95 %RH,
-2000 to 9000 hPa, <6000 m
Altitude ft -6000 to 30000 ft 1 50 ft At 77°F, <19,700 ft.
Max error +/- 98 ft
1 second m-2000 to 9000 m 1 15 m At 25 °C, <6,000 m.
Max error +/- 30 m
Density Altitude ft
-49.0 to 257.0 °F,
0.0 to 100.0 %RH,
8.86 to 32.48 inHg
1 246 ft 32 to 100 °F, 5-95% RH,
8.86 to 32.48 inHg, <19700 ft
1 second
m-45.0 to 125.0 °C,
0.0 to 100.0 %RH,
300.0 to 1100.0 hPa
1 75 m 0 - 37 °C, 5 to 95 %RH,
-2000 to 9000 hPa, <6000 m
The above values are calculated from the primary measurements of wind speed, temperature and relative humidity.
The above values are calculated from the primary measurements of wind speed, temperature, relative humidity and pressure.
Data Display and Storage
Minimum, maximum, average and logged history stored and displayed for every
measured value. 480-point data logger with graphical display. Auto data storage; interval
settable from 2 seconds to 12 hours. Manual data ca
p
ture.
Display Digits
Multifunction, multi-digit programmable dot-matrix display.
Display Update
1 second
Display Languages
English, French, German, Italian, Spanish
Display Backlight
Choice of aviation green or visible red electroluminescent backlight. Automatic or manual
operation.
Operational
Temperature Range
T
he operational temperature range of the liquid crystal display and batteries is 0° F to 131°
F / -18 °C to 55 °C. Beyond the limits of this range, the unit must be maintained within
ran
g
e and ex
p
osed for minimum time necessar
y
to take readin
g
.
Storage Temperature
-22 °F to 140 °F / -30 °C to 60 °C
Auto Shutdown
User-selectable: 15 minutes, 60 minutes or disabled
Batteries
AAA Alkaline, two, included. Average life, 400 hours of use, +/-depending on backlight
use.
Sealing
Waterproof (IP69 standard)
Dimensions
5.0 x 1.8 x 1.1 in / 12.7 x 4.5 x 2.8 cm
Weight
3.6 oz / 102 gm
Color
Dark grey, safety orange or olive drab (FED-STD-595B, Color 34088).