Handheld Weather Station for Motorsport Trackside Engine Tuning

Handheld Weather Station for Motorsport Trackside Engine Tuning
Maxtechnology System Co.,Ltd.
5/70 Soi ramkhamhaeng107, Ramkhamhaeng Rd., Hua mark, Bangkapi, Bangkok 10240
e-main: sales@maxtech.co.th site: www.maxtech.co.th
Handheld Weather Station for Motorsport Trackside Engine Tuning
Kestrel® 4250 RACING WEATHER TRACKER
Tel 0 2374 6956
FUNCTIONS
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x
Wind Speed
Temperature
Relative humidity
Moisture content / humidity ratio / water grains
Dew point
Station pressure
Barometric pressure
Air density
Relative air density
Density altitude
Wind chill
Heat index
Wet bulb temperature
Altitude
Time & Date
FEATURES
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Bluetooth®
model
available
Ideal for streaming
real-time data to
laptop or PDA
High accuracy
Wide operating range
Compact, rugged design
User-replaceable, precision Zytel® -mounted impeller
Fast response temperature sensor
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x
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Easy to read back-lit display – option of olive drab NV
version with low intensity red backlight
Min/max/average values or graphical data
User selectable units and language
User customisable screens
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x
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x
Data logging - up to 4000 readings
Data upload (with optional PC interface or integrated
®
Bluetooth wireless technology)
Runs from 2 AAA batteries (supplied)
Available in safety orange
The Kestrel 4250 Racing Weather Tracker has been
designed for those on the motor racing track, providing a
portable weather monitoring station.
The Kestrel 4250 Racing Weather Tracker allows you to
take instant accurate readings of environmental
conditions to help make those last minute dial-in or
tuning decisions. At the touch of a button important
weather information is clearly shown in digital or
graphical form.
The Kestrel 4250 offers a multitude of features to help
you monitor your environment in one single instrument.
Specifically for motor racers it provides key
measurements of air density, station pressure, humidity
ratio and density altitude.
Individual functions can be displayed in three different
formats: current, minimum/maximum/average and chart.
There are also three user screens, which can be
customised to simultaneously display the three most
appropriate functions for the application.
The Kestrel 4250 can be set up to log data automatically
(as well as manually) at programmable intervals, in order
to display a history of weather information. Graphs
display up to 3600 data points and the value, time and
date of capture point can be shown. The stored data
can also be uploaded to a PC, for analysis/storage with
actual size
(A4 page)
the optional
software.
Kestrel
Interface
and
Communicator
®
High precision Zytel bearings and a lightweight impeller
provide accurate air flow measurements (+/-3% of
reading) and the ability to operate at speeds as low as
0.6 m/s. The impeller is user-replaceable in case of
damage, also ensuring high accuracy levels are
maintained for life. An integral flip-open hard cover
protects the impeller when not in use.
A precision external thermistor sensor provides fast
response temperature readings and accuracy of +/- 1°C.
The 0.1 degree resolution of the display aids in
determining when a consistent reading has been
reached. A special housing protects the relative humidity
sensor from contamination providing an accuracy of +/3%.
A monolithic silicon based pressure sensor enables
pressure and density altitude to be calculated, with a
resolution of 0.1mbar and 1m respectively.
The Kestrel 4250 is powered by two easily replaceable,
AAA batteries and has two power saving modes to
prolong battery life. All text can be displayed in one of
five languages: English, French, Italian, Spanish or
German.
Maxtechnology System Co.,Ltd.
5/70 Soi ramkhamhaeng107, Ramkhamhaeng Rd., Hua mark, Bangkapi, Bangkok 10240
Tel 0 2374 6956
Fax 0 2374 6956
e-main: sales@maxtech.co.th site: www.maxtech.co.th
Maxtechnology System Co.,Ltd.
5/70 Soi ramkhamhaeng107, Ramkhamhaeng Rd., Hua mark, Bangkapi, Bangkok 10240
e-main: sales@maxtech.co.th site: www.maxtech.co.th
Kestrel 4250 Technical Specification
Kestrel® 4250 RACING WEATHER TRACKER
Physical
Dimensions
Weight
Lanyards
Case colour
Display type
Display update
Data logging
Functions
Display
Speed units
Temperature units
Relative humidity units
Pressure units
Density altitude units
Air density units
Relative air density units
Moisture content / humidity ratio units
Altitude units
Date and time display
Operational range
Specification range
Speed
(1 sec response)
Performance
On axis accuracy
Off -axis response
Calibration drift
Resolution
Operational range
Specification range
Temperature
(1 sec response)
Accuracy
Resolution
Wind chill accuracy
Operational range
Specification range
Relative
Resolution
Humidity
(1 min response)
Accuracy
Calibration drift
Heat index accuracy
Dew point accuracy
Operational range
Specification range
Pressure
Resolution
(1 sec response)
Accuracy
Calibration drift
Wet bulb temperature accuracy
Density altitude accuracy
Air density accuracy
Moisture content accuracy
Operational range
Specification range
Altitude
(1 sec response)
Accuracy
Resolution
Impeller
Sensors
Temperature
Relative Humidity
Pressure
Sealing
Shock
Environmental
Temperature
EMC
Battery
Battery Life
Auto switch off
Miscellaneous
Wind chill equivalent temperature
calculation
Heat Index calculation
Certification
Guarantee
Tel 0 2374 6956
127mm x 45mm x 28mm
102g
0.2m and 0.5m (for wrist and neck)
Safety orange
Dot matrix LCD with electro-luminescent backlighting
1 second
Programmable 2 second to 12 hour intervals, 3600 data points with graphical display. Manual data
capture. Data upload with optional PC interface. Bluetooth models only: Integrated Bluetooth wireless
data transfer with adjustable range from 5 to 30 feet..
Wind speed (current, maximum and average)
Air density
Temperature
Relative air density
Relative Humidity
Density altitude
Moisture content / humidity ratio / water grains
Altitude
Dew Point
Wind chill
Station pressure
Heat index
Barometric pressure
Wet bulb temperature
kt, m/s, km/h, mph, ft/min, Beaufort Force (B)
°C, °F
%
mbar, inHg, hPa, psi
m, ft
kg/m³, lb/ft³
%
g/kg, gpp
m, ft
dd/mm/yy, mm/dd/yy, 12 hour, 24 hour
0.6m/s to 60m/s (1.3 to 135.0mph)
0.6m/s to 40m/s (1.3 to 89.0mph)
Start-up speed stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9
mph | .8 kt after impeller start-up.
± 3% of reading or ± 0.1 m/s. (Some loss of accuracy from bearing wear may occur with sustained
operation at or near maximum speed)
-1% @ 5°, -2% @ 10°, -3% at 15°
<1% after 100hrs operation at 7m/s
0.1 kt, m/s, km/h, mph. 1 FPM below 1999 FPM, 10 FPM above 2000 FPM. 1 Beaufort (0 to 12)
-45.0°C to +125.0°C
-29.0°C to +70.0°C
±1°C
0.1°
±1.0°C (from wind speed and temperature)
0% to 100%
5% to 95% non-condensing
0.1%
±3% (when unit allowed to equilibrate to external temperature)
±2% over 24 months (correctable)
±2°C (between 21.1°C and 54.4°C)
±2°C (above 20% relative humidity)
10 to 1100 mbar at 25°C
750 to 1100 mbar at 25°C
0.1 mbar
±1.5 mbar (max error over range 0°C to 70°C: ±2.0 mbar)
Typically ±1 mbar per year (correctable)
±2°C (between 0°C and 37.8°C)
±75m (between 0°C and 37.8°C)
±2% (between 0°C and 70°C)
±10% (typical, between -29°C and 54°C)
-2000m to +9000m (-6000 ft to +30,000 ft)
-2000m to +6000m at 25°C
±15m (max error out of spec range: ±30m)
1m or 1ft
Diameter 25mm.
High precision axle and low-friction Zytel® bearings. Replacement impeller field installs without tools.
Air, water or snow temperature. Hermetically-sealed, precision thermistor mounted externally and
thermally isolated for rapid response. Airflow of 2.2 mph | 1 m/s or greater provides fastest response and
reduction of insulation effect. Calibration drift negligible.
Polymer capacitive sensor, mounted externally in thin-walled chamber
Monolithic piezo-resistive silicon based sensor with second-order temperature correction
Electronics enclosure IP67 and NEMA-6 [Water resistant]
Drop tested (MIL.STD.810F - unit only)
Operating range: -10°C to +55°C (for LCD readability and batteries)
Storage range: -30°C to +60°C
CE marked
2 off AAA alkaline, included, user replaceable
400 hours of use, average, ± depending on backlight use
Selectable to remain switched on or switch off 15 or 60 minutes after last key press
Perceived temperature resulting from combined effect of wind speed and temperature. Utilises the (US)
NWS Wind Chill Temperature (WCT) Index, revised 2001, with wind speed adjusted by a factor of 1.5 to
yield equivalent results for wind speed measured at 10m above ground
Steadman, from temperature and relative humidity
Wind speed, temperature, pressure and humidity measurements are tested during manufacture.
A certificate of conformity (C of C) is included with each Kestrel.
Calibration certificates are available for an additional fee.
5 years
Maxtechnology System Co.,Ltd.
5/70 Soi ramkhamhaeng107, Ramkhamhaeng Rd., Hua mark, Bangkapi, Bangkok 10240
Tel 0 2374 6956
Fax 0 2374 6956
e-main: sales@maxtech.co.th site: www.maxtech.co.th
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