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ANEMOMETER Kestrel 3500 - impeller air flow meter and more...
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Description
Anemometer Kestrel 3500 is a new generation device for weather
monitoring (new implementation from the end of year 2004). This pocket
size electronic device is used for measurement of wind speed,
temperature, wind chill dew point temperature, wet bulb thermometer
temperature (psychrometer), relative humidity, altitude, atmospheric
pressure and heat stress index.
The anemometer’s impeller of very light structure, has precise,
sapphire bearings, what assures accurate wind measurement also with
small air speed. In case of damage the impeller can be easily replaced
by a user.
The anemometer has an option of memorising one last result
(function data hold).
Combining of an anemometer and a thermometer allows calculation
through a built in device microprocessor an additional parameter–wind chill. The device, apart from a current
wind speed, allows on reading maximum wind gust and average in various
units.
The anemometer Kestrel 3500 has easy to read LCD display, which is
adapted to showing chosen parameters.
The device is powered from a lithium battery (tablet ), which assures continuous work of the device through 400 hours. The device switches off automatically its power supply, if no key button is used for more than 15 minutes.
The anemometer is made out of plastic, and its electronic elements are fully protected from moisture. The device floats, if it is accidentally dropped into water.
The device is equipped with a hard case and a wrist or a neck lanyard (protecting the device from being dropped during exploitation).
Applications
The anemometer is possible to be used in such fields as:
- agriculture - conditions for sprayings, conditions of storing the agricultural produce,
- motorization – control of cooling and air-conditioning systems,
- aviation – meteorological conditions for conducting the flights of gliders, hang-gliders, balloons,
- industry- controlling work conditions, air flow control in technological processes,
- coast guard - control of safety conditions,
- sport - control of conditions for performing different sports disciplines,
- air-conditioning and heat engineering- work control of ventilation and air-conditioning channels,
- fire department – assessing wind influence on fire’s spreading,
- police - control of the wind on roads (i.e. perpendicular to a way of traffic movement),
- science and research- meteorology, aerodynamics, environment testing.
Technical data
| MEASUREMENT OF AIR
SPEED |
|||
|---|---|---|---|
| Scope of measurement | 0,3...40 m/s | ||
| Measurement uncertainty (for a component in a
device axis) |
+/- 3% of a reading or +/- 0,1 m/s | ||
| Underrating indications for wind tilted from a device’s axis | -1% | for 5° angle | |
| -2% | for 10° angle |
||
| -3% | for 15° angle |
||
| Calibration drift |
<2% | after 100 hours of work at 7 m/s speed |
|
| Measurement resolution |
0,1 | kt, m/s, km/h, mph | |
| 1 | FPM | up to 1999 FPM | |
| 10 | FPM | from 2000 FPM | |
| 1 | Beaufort | 0...12 | |
| Speed measurement result
reading |
current | average from the last 3 seconds | |
| average |
an average from the moment of switching on the power supply | ||
| maximum | 3-second wind gusts from the moment of switching on the power supply |
||
| Choice of result units |
kt (knots), m/s, km/h, mph (miles per hour), FPM (foot per minute), Beaufort degrees | ||
| TEMPERATURE MEASUREMENT |
|
|---|---|
| Scope of air temperature measurement | -29...+70 °C |
| Measurement uncertainty of air temperature and wind chill | +/- 1 °C |
| Measurement uncertainty of dew point temperature |
+/- 2 °C |
| Measurement uncertainty of heat stress index | +/- 3 °C |
| Measurement resolution | 0,1 °C |
| Temperature measurement result reading |
current |
| wind chill, heat stress index temperature |
|
| Choice of result units |
degrees C, F |
| HUMIDITY MEASUREMENT |
||
|---|---|---|
| Measurement uncertainty |
typically +/- 5 %, up to +/- 15 % | |
| Scope of measurement | 5...95 % | |
| Measurement resolution | 0,1 % | |
| Calibration drift |
+/- 2 % | after 24 months |
| Response time | 1 min. | |
| ATMOSPHERIC PRESSURE MEASUREMENT |
||
|---|---|---|
| Measurement uncertainty |
+/- 3 hPa | in the temperature scope: -10°C...+60°C |
| Measurement resolution | 0,1 hPa | in the scope: 870... 1080 hPa |
| 0,01 inch Hg | in the scope: 25.7...31.9 cali Hg | |
| Calibration drift |
+/- 1 hPa | after 12 months |
| ALTITUDE MEASUREMENT | ||
|---|---|---|
| Measurement resolution | 1 m | in the scope: -500 ... 9000 |
| 3 ft (foot) | in the scope: -1600...30000 | |
| WORK CONDITIONS | |
|---|---|
| Degree of casing protection |
IP67 (waterproof with immersion up to 1 m in depth), floats on the water |
| Scope of work temperatures |
-20...+60 °C |
| Scope of storage temperatures |
-30...+80 °C |
| POWER SUPPLY | |
|---|---|
| Battery |
CR2032 |
| Battery work time |
400 hours |
| Automatic power supply switch off |
after 45 minutes |
| MECHANICAL PARAMETERS | |
|---|---|
| Overall outside measurements |
122 x 42 x 20 mm |
| Weight | 65 g |
| Impeller diameter |
25 mm |
