| The highly accurate Wind Research 300 3 axis
ultrasonic anemometer is a powerful
tool for applications such as atmospheric research, turbulence studies and carbon or other
trace gas monitoring. The Wind Research 300 measures horizontal and vertical wind speed and direction and has a separate measuring head and electronics to minimise flow distortion and
enable connection of external sensors (analogue input channels can be provided as an
option).
The real-time data quality checks which are user adjustable
makes this an ideal sensor for wind and turbulence studies. The capability of the Wind
Research 300 can be extended still further with the option to perform real-time
calculations of the turbulence parameters.
The sensor comes with a field calibration kit for user
confidence checks and a robust transport case.
CONTENTS ON THIS PAGE
OTHER LINKS
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Features
- separate measuring head and electronics which further
reduces flow distortion
- up to 50 Hz sampling rate
- wind speed range 0 - 100 mph
- digital outputs RS232 and RS422
- verifies and reports data quality
- mains or battery power
- field calibration kit
- transport case
Options
- on-line turbulence calculations
- 6 external sensor inputs for time-modulated data output
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What it does
The Wind Research 300 provides the following information in
various data outputs which can be polled or output automatically:
- instantaneous and averaged data for the three component wind
vectors
- virtual temperature
- horizontal wind speed and direction plus vertical wind
component
- chart mode (provides 0-540º wind direction and speed
values)
- NMEA value outputs
- raw data mode (uncorrected) or 2D / 3D head corrected data
Data can be averaged by several methods:
- scalar or vectoral
- clock synchronised or running average
- separate output rates and sampling times
Some other important features:
- user definable north orientation (range 0-359º alignment
off axis)
- data quality control to perform confidence checks on raw
data
- date / time stamps with several options
- check sum information
- calibration validity output monitoring
With the optional on-line turbulence
calculations it also outputs the following:
Near real-time turbulence calculations:
- mean wind components (3D) and temperature
- Standard Deviations (SD) of components and temperature
- covariances of different components and temperature
- SD values comparing mean wind to parallel component as well
as the horizontally and vertically perpendicular wind component
- turbulence intensities
- friction velocity
- Drag coefficient
- Monin-Obukhov stability
- momentum and heat fluxes
- u, v, w
- direction and velocity mean components or values
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Examples of data output
Normal data example
(instantaneous). Every data string starts with a header line that consists of the string
SNC followed by a space and 12 characters for the date/time stamp, another space and
finally the UTC string i.e.:
SNC 940815090015 UTC
x = 1.83 y =
-0.79 z = 0.20 T =
20.17
If you order the optional on-line turbulence
calculations you will also get turbulence data as per the following example:
The following lines display the averaged data using a fixed
format: up to 4 values per line each preceded by its name (5 characters, right-aligned), a
space character, an equals sign and an 8 character (right-aligned) floating point number
with a fixed number of decimal digits (possibly with trailing zeros). This number will be
replaced by 8 space characters in case of invalid data. The values are separated by a
space character. The names of the data and their ordering can be understood from the
following example:
SNC 940815090015 UTC AVE 600
SMP 10 AZI 0
SDQ 100 HTR
| x = |
1.74 |
y = |
-0.93 |
z = |
-0.14 |
T = |
0.62 |
| xsig = |
0.91 |
ysig = |
0.89 |
zsig = |
0.43 |
Tsig = |
0.47 |
| xycov = |
-0.3911 |
xzcov = |
-0.2010 |
xTcov = |
-0.1801 |
|
|
| yzcov = |
0.0961 |
yTcov = |
0.2170 |
zTcov = |
0.1200 |
|
|
| psig = |
1.07 |
qsig = |
0.70 |
rsig = |
0.40 |
|
|
| tp = |
0.54 |
tq = |
0.35 |
tr = |
0.20 |
|
|
| ustar = |
0.39 |
Tstar = |
0.31 |
Cd = |
0.04 |
|
|
| MOs = |
-0.03 |
mf = |
-0.19 |
hf = |
144.60 |
|
|
| u = |
-0.93 |
v = |
1.74 |
w = |
-0.14 |
|
|
| vel = |
1.98 |
dir = |
151.9 |
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_____________________________________________________________________
where:
| AVE |
the averaging time |
| SMP |
the sampling rate in Hertz |
| AZI |
the devise azimuth |
| SDQ |
the sonic data quality |
| HTR |
informs the user that the sensor head heating is turned on |
| x |
mean x wind component in the sensor related orthogonal co-ordinate system
(parallel to the black arrow on the electronic box); unit m/s |
| y |
mean y wind component in the sensor related orthogonal co-ordinate system
(horizontally perpendicular to x); unit m/s |
| z |
mean z wind component in the sensor related orthogonal co-ordinate system
(vertical); unit m/s |
| T |
mean temperature; unit ºC |
| xsig |
standard deviation of x; unit m/s |
| ysig |
standard deviation of y; unit m/s |
| zsig |
standard deviation of z; unit m/s |
| Tsig |
standard deviation of T; unit K |
| xycov |
covariance of x and y; unit m2/s2 |
| xzcov |
covariance of x and z; unit m2/s2 |
| xTcov |
covariance of x and T; unit mK/s |
| yzcov |
covariance of y and z; unit m2/s2 |
| yTcov |
covariance of y and T; unit mK/s |
| zTcov |
covariance of z and T; unit mK/s |
| psig |
standard deviation of the wind component parallel to the mean wind direction;
unit m/s |
| qsig |
standard deviation of the wind component horizontally perpendicular to the mean
wind direction; unit m/s |
| rsig |
standard deviation of the wind component vertically perpendicular to the mean
wind direction; unit m/s |
| tp |
longitudinal turbulence intensity |
| tq |
transversal turbulence intensity |
| tr |
vertical turbulence intensity |
| ustar |
friction velocity u.; unit m/s |
| Tstar |
characteristic temperature T.; unit K |
| Cd |
drag coefficient Cd |
| MOs |
Monin-Obukhov stability parameter; unit m-1 |
| mf |
vertical momentum flux; unit kg/ms2 |
| hf |
vertical heat flux; unit W/m2 |
| u |
mean west-east wind component
(depends on setting of parameter AZ); unit m/s |
| v |
mean south-north wind component
(depends on setting of parameter AZ); unit m/s |
| w |
mean vertical wind component; unit m/s |
| vel |
mean horizontal wind velocity; unit m/s |
| dir |
mean
horizontal wind direction
(depends on setting of parameter AZ); unit º |
The following data strings will only be displayed
with the optional inputs as shown:
| 2
x PT100 inputs |
6 x analogue input channels |
| e1
and e2 |
e3
to e8 |
| e1sig
and e2sig |
e3sig to e8sig |
| e1zco and e2zco |
e3zco to e8zco |
where:
| 2 x PT100 inputs |
e1 and e2
|
mean Pt100 temperatures
(based on a0, a1 values of the basic system); unit ºC |
e1sig and e2sig
|
standard deviations of the Pt100 temperatures
(based on a0, a1 values of the basic system); unit K |
e1zco and
e2zco |
covariances of the Pt100 temperatures
(based on a0, a1 values of the basic system) with z; unit Km/s |
| 6 x analogue inputs |
e3 to e8
|
mean values of the analogue input channels
(based on a2 ... a7 values of the basic system); unit V |
e3sig to e8sig
|
standard deviations of the analogue input channels
(based on a2 ... a7 values of the basic system); unit V |
e3zco to e8zco
|
covariances
of the analogue input channels
(based on a2 ... a7 values of the basic system) with z; unit Vm/s |
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Specifications of the Wind
Research 300 ultrasonic anemometer
| Wind Speed |
|
| Range |
0.01 - 45 m/s (0 - 100 mph) |
| Accuracy |
+/- 2 % (full scale output) |
| Resolution |
0.01 m/s (steps) |
| Wind Direction |
|
| Range |
0 - 359o or 0- 540o |
| Accuracy |
+/- 2o |
| Resolution |
0.4o (steps) |
| Digital Output |
|
| Type |
RS232, RS422 |
| Sampling rate |
50 Hz |
| Averaging |
up to 3600 seconds |
| Analogue Inputs x 6 (optional) |
|
| Type |
+/- 2.5 V, +/- 5 V, +/- 10 V |
| Resolution |
12 bit |
| Sample delay option |
Yes |
| PRT / TTL inputs |
2 x TTL |
| Power |
|
| Requirements |
9-36 VDC or 115 / 230 VAC |
| Current draw |
180 mA (@ 24 VDC) |
| Data |
|
| Turbulence data |
optional |
| Sonic temperature |
-30oC to 50oC (-22oF to 122oF)
in non-condensing environments |
| Units of measure |
m/s, knots, mph, km/h, oC |
| General |
|
| IP rating |
IP65 |
| Size |
32 cm x 69 cm (12 x 27 inches) |
| Weight |
7.1 kgs (15 Ibs) |
| Materials: |
|
| sensor
head |
stainless steel (V4A) |
| electronic
housing |
powder-coated die-cast aluminium |
This range is in continuous development
therefore
specifications may change without prior notice. E&OE
Accessories
Included with the Wind Research 300 ultrasonic anemometer:
Field
Calibration Kit
Transport Case
Mains Adapter
20 m (65 ft) power, data and analogue cable (8 m (26
ft) between the measuring head and electronics box and 12 m (39 ft) from electronics box)
Options for the Wind Research 300:
Option 1: on-line turbulence calculations
Option 2: 6 external analogue inputs for time-modulated data output
See also BiralView software
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Delivery
This unit is usually
dispatched within 6 - 8 weeks ARO (After Receipt of Order)
After Sales Support
Biral offers free advice and technical support
for the lifetime of the instruments we sell. Once you have purchased the unit you can
contact us for help on wwwmetsupport@biral.com
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