• Classifi ed acc. to IEC 61400-12-1:2017
• Measurement of wind direction & speed in 3 dimensions X, Y and Z
• Real-time measurement
• Highest precision, maintenance-free and heatable
• Digital / analog outputs and inputs
Description
The Ultrasonic Anemometer 3D is designed to measure the horizontal and vertical components of wind velocity, wind
direction and acoustic virtual temperature in 3 dimensions. The Ultrasonic Anemometer 3D consists of 6 ultrasonic
transformers, in pairs facing each other at a distance of 200 mm. The three resulting measurement paths are vertical
in relation to each other. The transformers function both as acoustic transmitters and receivers.
In comparison to cup anemometers, the measuring principle provides for inertia-free measurement of rapidly chang-
ing variables with maximum precision and accuracy. It is particularly suitable for the measurement of gusts and peak
values. The level of accuracy achieved when measuring the air temperature (acoustic virtual temperature) surpasses
that of classical methods, in which the temperature sensors are used with a weather and radiation shield, following
correction of the infl uence of damp occurring with certain weather situations.
The maintenance-free and wearless anemometer needs no re-calibration, and is equipped with a heating for winter
operation even under extreme conditions.
All calculations are carried out by a high-capacity digital-signal-processor (DSP) within the propagation time of the ul-
trasonic signals with an accuracy basis of 32 bit. The instrument offers comprehensive statistic functions such as glid-
ing averaging, standard deviation, co-variance etc., which can be selected via the digital interface. The gliding averaging
can be set optionally in vectorial or scalar form, identically or differently for each parameter.
Heating
For a multitude of applications the continuous output of solid measuring data of the wind velocity and direction is an
indispensable requirement to the measuring system, even under meteorological extreme conditions such as icing situ-
ations. The Ultrasonic is equipped with a sophisticated heating system. This system keeps all outer surfaces that might
disturb the measuring value acquision in case ice formation, ef ciently on a temperature above +5°C.
Also the measuring arms belong to the heated outer surfaces, as well as additionally the ultrasonic transducer and the
housing – depending on the model. The Utrasonic is in a position to generate measuring data with high accuracy even
in unheated state at temperatures of up to below –40 °C. There is no temperature-depending quality of the measur-
ing data. The heating is necessary only for avoiding the ice formation on the instrument construction, thus avoiding an
involved failure in the measuring value acquistion.
Ultrasonic Anemometer Thies 3D
S83100H: Heating for sensor arms and ultrasonic converters
S83300H: Extra strong heating for the whole sensor incl. housing
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Alignment to north with North ring adapter (S83010)
We recommend installing a North ring adapter (1; yellow), which assists aligning the sensor cor-
rectly and avoids re-alignment after sensor replacement.
The North ring adapter is installed between sensor and boom. It is equipped with a north pin
(2; red) and a direction bearing tube (3; violet). By selecting a xed point in north direction, the
adapter can easily be aligned and xed with screws on the boom.
Remove the tube and place the sensor on the adapter. The sensor is mounted with its north drill-
ing on the north pin of the adapter and screwed in place.
Ultrasonic Anemometer Thies 3D
Dimensional drawing
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Specications
Wind Speed
Measuring range 0 ... 85 m/s (measures up to 99.99 m/s + output); Scaling of analog output selectable
Starting threshold: 0.01 m/s
Accuracy ≤ 5 m/s: ± 0.1 m/s rms (root mean square over 360°)
> 5 m/s ... ≤ 35 m/s: ± 1% rms of measured value (root mean square over 360°)
> 35 m/s ... ≤ 65 m/s: ± 2% rms of measured value (root mean square over 360°)
> 65 m/s ... ≤ 85 m/s: ± 3% rms of measured value (root mean square over 360°)
Resolution 0.1 m/s (telegrams No. 1 to 4)
0.01 m/s (telegrams No. 5 to 12 and user-dened)
Wind Direction
Measuring range Azimuth: 0 ... 360° Elevation: -90° ... 90°
Accuracy ± 1° with wind velocity > 1 m/s ≤ 35 m/s
± 2° with wind velocity > 35 m/s ≤ 65 m/s
± 4° with wind velocity > 65 m/s ≤ 85 m/s
Resolution 1° (telegrams No. 1 to 4)
< 1° (telegrams No. 5 to 12 and user-dened)
Acoustic Virtual Temperature
Measuring range -40 ... +70°C (not specied, but useful measuring range: -75 ... +75°C)
Accuracy ± 0.5 K
Resolution 0.1 K (in telegrams No. 1 to 5)
Ultrasonic Anemometer Thies 3D
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Data Output Digital
Interface RS485 / RS422
Baud rate 1200 to 921600 adjustable
Output Instantaneous values, wind speed / direction and acoustic virtual temp.
Sliding mean values 0.5 sec to 100 min freely selectable
Output rate 1 per 1 msec to 1 per 60 sec., adjustable in msec steps
Status identication Heating, measurement path failure, ΔT path temperatures
Data Output Analog
Electr. output 0 ... 20 mA / 0 ... 10 V or 4 ... 20 mA / 2 ... 10 V for wind vectors X, Y and Z
Output Wind vectors X, Y and Z, Instantaneous values, sliding mean values 0.5 sec to 100 min
freely selectable
Output rate Updating rate 0.1 ... 100 Hz
Resolution 16 bit
Analog Inputs
Input number Up to 5 analog inputs possible. (3x standard, 2x add. congurable acc. to manu.)
Input resolution 16 bit
Sampling rate 0.1 ... 100 Hz per channel
Input range 0 ... 10 V
Data processing Output of measured values in user-specic telegram
Accuracy ± 1% of meas. value in the range -40 ... +70°C
Linearity, integral INL: type < 6LSB
Effective low-noise bits Type 14 bit (at DC-supply for avoiding of dynamic cross-talk in the connection line)
General
Temperature range Oper. temperature: -40 ... +70°C; Storage: -50 ... +80°C; with heating up to -75°C
Internal measuring rate Up to 285 complete measurement sequences per second at 20°C
Operating voltage
S83100H
S83300H
Power supply electronics: 8 ... 78 VDC, 1.5 VA, max. 2.5 VA
Power supply electronics + heating: 24 V AC/DC ± 15%: typ. 150 VA
Power supply electronics + heating: 48 V AC/DC ± 15%: typ. 360 VA
EMC EN 55022: 1998 class B; EN 55024: 1998; EN 61326:1997; A3:2003
Electr. connection 8-pole plug
Manufacturer Thies
Ammonit Meteo-40 RS485-M (Half duplex, 2-wire, baudrate: 38400 bps)
Accessory Module set M83575 (incl. isolated repeater)
Sensor Connection to Ammonit Meteo-40 Data Loggers
In order to connect the Ultrasonic sensor to the Ammonit Meteo-40 data logger, an additional module set (M83555 or
M83575) has to be installed between sensor and data logger.
Connector Pin Assignment (Serial interface, half-duplex and analog outputs)
Plug
Pin No.
Ammonit
Wire Color
Allocation Function Solder terminal of
coupling socket
1 WG* Analog output wind speed
2 brown TXD- / RXD- Serial interface
3 green
ADIO (Analog Digital Input Output)** Function congurable
4 WR* Analog output wind direction
5 white TXD+ / RXD+ Serial interface
6 yellow AGND Analog ground
7 red/pink AC/DC Supply, reverse-polarity protected
8 blue/grey AC/DC Supply, reverse-polarity protected
* If congured by Ammonit, Pin not used.
** Pin congured for analog output of wind speed. OR If heating is managed by the Meteo-40 data logger, Pin 3 is congured
to switch the sensor heating.
Cable type (without heating): LiYCY 4 x 2 x 0.25 mm²
Ultrasonic Anemometer Thies 3D
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