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+ wind FIND
+ wind type
+ wind ultrasonic
+ wind
3-axis
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FIND
by application
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Customized models
are available, please email to discuss your requirements
_______________ |
The USA-1 Research 400 is a 3-axis
ultrasonic wind sensor for the highly accurate measurement of
horizontal and vertical wind speed and direction.
With on-line turbulence calculations and the ability to connect additional sensors to
produce a compact, portable station the Research 400 is ideal for use as part of an
eddy-flux station.
CONTENTS ON THIS PAGE
OTHER LINKS
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Features
- separate measuring head and electronics which further
reduces flow distortion and error
- up to 50 Hz sampling rate
- wind speed range 0 - 100 mph
- digital and analog outputs
- verifies and reports data quality
- 6 external sensor inputs with time delay capability for
time-modulated data output
- 16 bit resolution on analog inputs
- 4 analog channel outputs
- 2 x TTL and 2 x PT100 inputs
- on-line turbulence calculations
- mains or battery power
- field calibration kit
- transport case
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What it does
The USA-1 Research 400 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 synchronized 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
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
Turbulence data example (averaged).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 |
|
|
|
|
_____________________________________________________________________
where:
| AVE |
the averaging time |
| SMP |
the sampling rate in Hertz |
| AZI |
the devize 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 coordinate system
(parallel to the black arrow on the electronic box); unit m/s |
| y |
mean y wind component in the sensor related orthogonal coordinate system
(horizontally perpendicular to x); unit m/s |
| z |
mean z wind component in the sensor related orthogonal coordinate 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 be displayed for the analog inputs/counters:
| 2
x PT100 inputs |
6 x analog input channels |
2 x TTL
counters |
| e1
and e2 |
e3
to e8 |
c1 and c2 |
| 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 analog inputs |
e3 to e8
|
mean values of the analog input channels
(based on a2 ... a7 values of the basic system); unit V |
e3sig to e8sig
|
standard deviations of the analog input channels
(based on a2 ... a7 values of the basic system); unit V |
e3zco to e8zco
|
covariances of the analog input channels
(based on a2 ... a7 values of the basic system) with z; unit Vm/s |
| 2 x TTL counters |
| c1 and c2 |
Counted
events (based on c0, c1 values of the basic system); unit 1 |
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Specifications USA-1
Research 400 anemometer
| Wind Speed |
|
| Range |
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 |
| Analog Outputs x 4 |
|
| Type |
0-5 V, 0- 10 V, 0-20 mA, 4-20 mA |
| Resolution |
12 bit |
| Scalable |
Yes |
| Analog Inputs x 6 |
|
| Type |
+/- 2.5 V, +/- 5 V, +/- 10 V |
| Resolution |
16 bit |
| Sample delay option |
Yes |
| PRT inputs |
2 |
| TTL inputs |
2 |
| PT100 inputs |
2 |
| Power |
|
| Requirements |
9-36 VDC or 115 / 230 VAC |
| Current draw |
180 mA (@ 24 VDC) |
| Data |
|
| Turbulence data |
Yes (see above for more information) |
| Sonic temperature : |
|
| with digital output |
-22oF to 122oF (-30oC to 50oC)
in non-condensing environments |
| with analogue output |
measures within a 40o span (user configurable) of the
above range with a resolution of 0.01oC |
| Units of measure |
m/s, knots, mph, km/h, oC |
| General |
|
| IP rating |
65 |
| Size |
12 x 27 inches |
| Weight |
15 Ibs |
| Materials: |
|
|
sensor head |
stainless steel (V4A) |
|
electronic housing |
powder-coated die-cast aluminum |
This range is in continuous development
therefore
specifications may change without prior notice. E&OE
Accessories
Included with USA-1 Research 400:
Field
Calibration Kit
Transport Case
Mains Adapter
65 ft power, data and analog cable (26 ft between the
measuring head and electronics box and 39 ft from electronics box)
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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 wwwusametsuppport@biral.com
|
Search
web site
|
Links to previous pages
+ USA / Canada met index
Wind Section
+ wind FIND
+ wind type
+ wind ultrasonic
+ wind
3-axis
-
YOU ARE HERE
FIND
by application
|
Not sure
if this is the right sensor for you and would like help selecting a sensor?
If you have not decided which sensor you would
like or you would like to have a customized sensor incorporating
features from more then one model please email wwwusamet@biral.com
or if you would prefer try the following
pages:
find sensors by application type
This range is in continuous development
therefore specifications may change without prior notice. E&OE
Thank you for visiting www.biral.com/met/usa/wind/res400.htm
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