senseca WUS30F Ultrasonic Anemometer

Specifications

• Wind Speed Sensor: Measuring Range, Resolution, Accuracy
• Wind Direction Sensor: Measuring Range, Resolution, Accuracy
• Sonic Temperature Sensor: Measuring Range, Resolution, Accuracy
• Barometric Pressure Sensor: Measuring Range, Resolution, Accuracy
• Tilt Angles: Resolution, Accuracy
• General Features:
  • Instrument Power Supply (*)
  • Heating Power Supply (**)
  • Serial Outputs
  • Communication Protocols
  • Analog Outputs
  • Measurement Interval
  • Wind Speed Averaging Interval
  • Wind Gust Calculation Interval
  • Electrical Connection
  • Operating Temperature
  • Protection Degree
  • Anti-corrosion Test
  • Anti-icing/Freezing Rain Test
  • Vibration Resistance Test
  • Survival Speed
  • Weight
  • Housing Installation on Mast (40 mm external and 36 mm internal)

Product Usage Instructions

3. Wind Speed and Direction Measurement

The anemometer measures wind speed and direction accurately.
Ensure the device is correctly installed and aligned for precise readings.

4. Installation

4.1 Alignment of the Instrument

Properly align the anemometer to ensure accurate wind data collection.

4.2 Tilt Angles

Adjust tilt angles as needed for optimal performance and monitoring.

4.3 Electrical Connections

Securely connect the instrument following the provided guidelines to ensure proper functionality.

Frequently Asked Questions

• Q: Is field calibration required for this anemometer?
  • A: No, all sensors are factory-calibrated, and additional calibration by the user is not necessary.
• Q: What type of output does each model provide?
  • A: The different models offer various analog output options such as 0-20 mA, 4-20 mA, 0-1 V, 0-5 V, and 0-10 V.

OPERATING MANUAL
AEOLUS WUS30F
Ultrasonic anemometer
EN V1.1

AEOLUS WUS30F – Ultrasonic anemometer

Introduction

AEOLUS WUS30F… is a 3-axis ultrasonic static anemometer. In addition to the measurement of wind speed and direction, the anemometer also provides the U-V-W Cartesian components of wind speed and the Wind Gust values.
Equipped with heating which prevents the whole detection area from the accumulation of snow and ice formation, allowing accurate measurements in all environmental conditions.
The AISI 316 housing allows the instrument to be used even in a particularly aggressive atmosphere (e.g., marine environment).
The anemometer integrates a barometric pressure sensor and a tilt/roll sensor for continuously monitoring a possible misalignment with respect to the vertical axis.
Available outputs:
· RS232, RS485 and RS422 isolated outputs, with NMEA, Modbus-RTU and ASCII proprietary protocols.
· SDI-12 isolated output.
· Three analog outputs, for wind speed and direction or for wind U-V-W cartesian components. The type of analog output depends on model.
Mounting on a 40 mm mast.
The high immunity to electromagnetic disturbances makes the anemometer suitable for measurements in electrically noisy environments (e.g., industrial environments, wind farms, etc.).
All instrument sensors are factory-calibrated and do not require additional interventions of the user (field calibration is not required).
The absence of moving parts minimizes the instrument maintenance.
The anemometer satisfies the requirements of the following standards:
· MIL-STD-810G Method 509.6 and EN ISO 9227:2017 (salt fog anti-corrosion test)
· MIL-STD-810F Method 521.2 (anti-icing/freezing rain test)
· EN 60068-2-6:2008 / IEC 60068-2-6:2007 (vibration resistance test)

MODELS The different models differ in the type of analog output:

Model
WUS30FA WUS30FW WUS30FX WUS30FY

0…20 mA 4…20 mA

Analog output

0…1 V

0…5 V

0…10 V

Page 3 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Technical specifications

Wind speed Sensor Measuring range Resolution Accuracy
Wind direction Sensor Measuring range
Resolution Accuracy
Sonic temperature Sensor Measuring range Resolution Accuracy Barometric Pressure Sensor Measuring range Resolution Accuracy
Tilt angles Resolution Accuracy General features Instrument power supply (*) Heating power supply (**) Serial outputs Communication protocols Analog outputs

Ultrasounds 0…85 m/s 0.01 m/s ± 0.2 m/s or ± 2% of measure, the greatest (0…65 m/s) ± 3% of measure (> 65 m/s)
Ultrasounds 0…360° (Azimuth) ± 60° (Elevation) 0.1° ± 2° RMSE (2 m/s < wind speed < 65 m/s) ± 3° RMSE (wind speed > 65 m/s)
Calculated quantity -40…+60 °C 0.1 °C ± 1 °C
Piezoresistive 300…1100 hPa 0.1 hPa ± 0.5 hPa (700…1100 hPa) @ 20 °C ±1 hPa (500…1100 hPa) / ±1.5 hPa (300…500 hPa) @ T=0…60 °C
0.05° ± 1°
12…30 Vdc (15…30 Vdc for 0…10 V output) / < 8 W 24 Vdc ± 10% / 105 W Isolated RS232, RS485, RS422 and SDI-12 NMEA, Modbus-RTU, SDI-12, ASCII proprietary 3 isolated analog outputs, for wind speed and direction or for speed U-V-W cartesian components. Output type: 0/4…20 mA, 0…1 V, 0…5 V or 0…10 V depending on model. Load: max. 500 for current output, min 10 k for voltage output. Analog outputs updating rate 4 Hz.

Page 4 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Measurement interval Wind speed averaging interval Wind Gust calculation interval Electrical connection Operating temperature Protection degree Anti- corrosion test
Anti-icing/freezing rain test Vibration resistance test Survival speed Weight Housing

From 1 to 4 Hz (measurements/s) Configurable from 1 s to 10 min Configurable from 1 s to 10 min 19-pole M23 male connector -40…+70 °C IP 67 (EN 60529) MIL- STD-810G Method 509.6 (48 hours of exposure + 48 hours of drying) EN ISO 9227:2017 MIL-STD-810F Method 521.2 EN 60068-2-6:2008 / IEC 60068-2-6:2007 100 m/s 2.6 kg approx. AISI 316

Installation

on mast 40 mm external and 36 mm internal

(*) The main power supply of the instrument also powers the sensors heating, which cannot be disabled. The max. consumption occurs when the sensor heating is on.
(**) Heating of sensor support arms is independent of the main instrument power supply and can be disabled.

Dimensions (mm)

Page 5 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Wind speed and direction measurement

Wind speed and direction are determined by measuring the time taken by ultrasonic pulses to cover the distance from the transducer that generates the pulse to the receiving transducer.
The instrument uses 3 pairs of transducers oriented along orthogonal axes. Detecting the wind speed along the various axes allows determining not only the intensity but also the wind direction.
The instrument measures the travel time of the ultrasonic pulse between the two transducers of the same pair in both directions. The travel times in the two opposed directions are defined as tA (forward direction time) and tR (reverse direction time).
If wind speed is zero, tA and tR values are the same. In the presence of wind, one of the two time values is greater than the other and the comparison between the two time values allows determining wind intensity and direction.
Measuring the travel time in both directions allows cancelling the dependence of the transmission speed of ultrasounds in the air from the environmental conditions of temperature, humidity and barometric pressure.
Transducers pair

The travel times of the ultrasonic pulses are given by:

Where:

tA=

C

D + Vn

tR=

C

D – Vn

D = Distance between the two transducers of the same pair C = Sound speed Vn = Component of wind speed along the measurement axis

Measuring the two travel times allows determining the wind speed component:

Vn

=

D 2

(t1A

–

t1R)

The wind speed components are given by convention along Cartesian axes called U, V and W. The U axis is the axis from West to East, the V axis is the axis from South to North, the W axis is the vertical component.

It is defined elevation angle the angle formed by the wind speed vector with respect to the horizontal plane The angle is positive above the horizontal plane.

It is defined Azimuth the angle formed by the projection of the wind speed vector in the horizontal plane with respect to the direction of geographic North (considered the 0° reference). The angle is positive proceeding from North clockwise (toward East).

Page 6 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Installation

The instrument is supplied with 4 bird spikes, which can be screwed into the holes on the head of the instrument. Be careful not to get hurt by sharp spikes.
To install the instrument, pass the connection cable inside the support mast and connect the 19-pole M23 female connector of the cable to the 19-pole M23 male connector situated at the bottom of the instrument. Ensure connection stability by tightening the connector external nut.
Slide the instrument completely into the support mast and align it (see par. 4.1), then fix it to the mast by tightening the four M8 grub screws at the bottom of the instrument (fix the upper grub screws first).

The support mast, having 40 mm max. outer diameter and 36 mm min. inner diameter, must be positioned on a stable surface and electrically connected to ground. The instrument should be installed vertically (check the tilt angles provided by the instrument) and in an open area, far from obstructions located in the vicinity that might alter the natural air flow. Any close objects (such as buildings, trees, pylons, etc.) should be at a distance equal to at least ten times their height.
Page 7 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

In presence of close objects, it is advisable to place the instrument at a height of 10 m.
If the instrument is installed on a building, the height of the instrument should be at least 1.5 times the minimum value between the height of the building and the roof longest diagonal.
4.1 Alignment of the instrument
The instrument measures the wind direction with respect to a reference on the housing: the hole on the support disk of the lower arms. The reference must be aligned with the geographical North.
A magnetic compass placed on the lower part of the arm coming out at the reference hole can be used for alignment, taking into account the magnetic declination (angular difference between geographical north and magnetic north) of the place where the instrument is installed.
It is possible to align the instrument with the magnetic North and set in the instrument a magnetic declination value (serial command cxd), allowing the measurements to be referred to geographical North.

North reference hole

Compass

If wind speed and direction (Azimuth) values are given in polar coordinates, 0° angle corresponds to a wind coming from North.

Page 8 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

4.2 Tilt angles For an accurate measurement, the anemometer must be installed in an exactly vertical position. Alignment with respect to the vertical axis can be verified by means of the tilt angles provided by the instrument. The instrument detects two tilt angles: Tilt_X, tilt of the X axis, and Tilt_Y, tilt of the Y axis.
North reference hole

Top view

The tilts are considered with respect to a plane parallel to the ground.

Tilt

Tilt

(positive) (negative)

Axis (X or Y)

Page 9 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

4.3 Electrical connections
The instrument has 19-pole M23 male connector. Below are the numbering and function of the connector pins and the color correspondence with the wires of the optional CPM23-19.x cable.
Reference

Male connector (visible side)

Connector pin number
1 2 3 4 5 6 7 8 9

CPM23-19.x wire color White/Red White/Grey
Yellow/Brown Brown/Green
Violet Brown Grey/Brown Yellow Grey

Symbol
AOUT3 SDI-12
RX+ HEATHEAT+ HEATHEAT+ DGND
TX-

10

White/Yellow AUX_B

11

White

AUX_A

12

Black

V-

13

Green

RX-

14

Pink/Brown

AOUT1

15

Blue

AGND

16

Red/Blue

AOUT2

17

White/Green

TX+

18

—

19

Red

V+

—

Grey/Red

SHIELD

(*) DGND and AGND are internally shorted.

Description
Analog output 3 positive SDI-12 output Serial receive (input) positive Arms heating power supply negative Arms heating power supply positive Arms heating power supply negative Arms heating power supply positive Digital ground (isolated from V ­) () Serial transmission (output) negative “DATA ­” main RS485 output “DATA +” auxiliary RS485 output (D+) “DATA ­” auxiliary RS485 output (D-) Instrument power supply negative Serial receive (input) negative Analog output 1 positive Analog ground (isolated from V ­) () Analog output 2 positive Serial transmission (output) positive “DATA +” main RS485 output Not connected Instrument power supply positive Cable shield / Connector shell / Anemometer housing

Page 10 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Warning!
The metallic housing of the anemometer should be grounded locally, via the support mast. The CPM23-19.x cable shield is connected to the connector shell and then to the metallic housing of the anemometer. Do not connect the gray/red wire (cable shield) to ground, unless it is not possible to ground the anemometer metallic housing locally via the support mast.

4.3.1 RS232 connection

PC RS232 port

The maximum length of the RS232 connection is typically 15 m.

Power supply

4.3.2 RS485 connection

Other sensors with RS485 output

PLC, datalogger or RS485/USB or RS485/RS232
converter for PC

Power supply
Multiple sensors can be connected in sequence through a twisted-pair shielded cable for signals and a third wire for ground. The maximum RS485 bus length depends on baud rate and cable characteristics. Typically, using a specific RS485 cable, the maximum length is 1200 m. Before connecting the anemometer to the network, set the address and the communication parameters, if different from the factory preset (see chapter 5).
Page 11 of 36

AEOLUS WUS30F – Ultrasonic anemometer
4.3.3 RS422 connection

V1.1
PLC, datalogger or RS485/USB or RS485/RS232
converter for PC

Power supply

RS422 standard is used for point-to-point connection on long distances, via a shielded cable with two twisted pairs for signals and an additional wire for ground.
The maximum connection length depends on baud rate and cable characteristics. Typically, using a specific RS422 cable, the maximum length is 1200 m.
Before connecting the anemometer to the network, set the address and the communication parameters, if different from the factory preset (see chapter 5).
4.3.4 SDI-12 connection

Other sensors with SDI-12 output

SDI-12/USB or SDI-12/RS232 converter or
data logger with SDI-12 input

Power supply
More sensors can be connected in parallel. The baud rate is 1200. The SDI-12 bus maximum length is 60 m. The instrument should be configured to operate in SDI-12 mode. Set the address (see chapter 5) before connecting the instrument to the network.
Page 12 of 36

AEOLUS WUS30F – Ultrasonic anemometer
4.3.5 Analog outputs connection

V1.1

Power supply
The anemometer power supply and the load resistance vary according to the type of analog output:

Analog output 0…20 mA 4…20 mA 0…1 V 0…5 V 0…10 V

Power supply required 12…30 Vdc 12…30 Vdc 12…30 Vdc 12…30 Vdc 15…30 Vdc

Load resistance 500 500 10 k 10 k 10 k

For associating the outputs with the various available parameters, see chapter 5.

4.3.6 Heating connection
The sensors heating is powered by the main instrument power supply, while the sensor support arms heating power supply is independent (HEAT- e HEAT+).
Due to the power required by the heating, it is recommended to connect both HEATand both HEAT+ wires, so as to halve the current in each wire.
The heating system is switched on below +5 °C. After switching on, the heating is switched off when the temperature exceeds +15 °C.

Page 13 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

4.3.7 Auxiliary RS485 output connection The auxiliary RS485 output can be used as an alternative to the main serial output for connecting the instrument to the PC, for the configuration of the instrument. The output does not support the operating protocols (NMEA, Modbus-RTU and ASCII proprietary). The auxiliary RS485 output can be used for the configuration of the instrument and the communication with the HD52.3D-S application software in case the main serial output is busy with one of the operating protocols.
Warning! The auxiliary RS485 output is not available if the SDI-12 operating mode is set in the instrument.
For connecting the auxiliary RS485 output to the PC, the optional RS51K kit can be used. The kit includes the SWD10 power supply and the RS485/USB adapter with:
o screw terminals for the connection to the CPM23-19… cable (not included); o USB connector for the connection to the PC; o jack connector for connecting the SWD10 power supply.
Power supply
SWD10

RS485/USB adapter
To PC
To use the RS51K kit, the USB drivers included in the HD52.3D-S software package should be installed in the PC.
4.3.8 RS52 cable connection The RS52 optional cable, equipped with RS232/USB converter, allows connecting the instrument main serial output to a PC USB port.
RS232/USB adapter

To PC
To use the RS52 cable, the USB drivers included in the HD52.3D-S software package should be installed in the PC. The instrument is powered directly from the USB port of the PC.
Page 14 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

4.4 Serial output protocol
Unless otherwise requested, at the first power up the instrument main serial output starts in configuration mode and waits to receive the commands for setting the operating parameters (see chapter 5) or the connection with the HD52.3D-S application software.
In this case, in order to activate an operating protocol (NMEA, Modbus-RTU or ASCII proprietary) it is necessary to set it with the appropriate serial command (CUMn, see chapter 5) or with the aid of the HD52.3D-S application software.
If the instrument is set up to work with an operating protocol, the protocol becomes active 10 seconds after power on (in the first 10 seconds the instrument waits for a possible command to enter configuration mode, as explained in chapter 5).
The auxiliary RS485 output is always in configuration mode.

Page 15 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Configuration

Configuration mode allows reading the instrument general info (firmware version, serial number, …) and to set the instrument operation mode and operation parameters. The configuration of the instrument can be done:
· With the aid of HD52.3D-S application software (see the software online help), downloadable from the website.
· By sending serial commands (listed in paragraph 5.1) via a standard communication program, setting the following parameters in the program: 115200 (baud rate), 8N2, flow control none.
For the configuration, the instrument can be connected to the PC:
· Via auxiliary RS485 (see paragraph 4.3.7 for the connection). The auxiliary RS485 serial output is always in configuration mode and therefore it is always available to receive commands from the PC.
· Via RS232 (see paragraphs 0 and 4.3.8 for the connection). The instrument can receive commands from the PC via RS232 only if it is in configuration mode (factory setting, unless otherwise requested). If the instrument is not set in in configuration mode but in one of the available operating modes (NMEA, Modbus-RTU or ASCII proprietary), to enter configuration mode it is necessary to send within 10 seconds from power on (if the instrument is already powered, disconnect and reconnect the power supply) the serial command @, if a standard communication program is used, or the request of connection with the HD52.3D-S software.

5.1 Serial commands

Instrument information:

Command

Reply

G1

&VPnn.nn yyyy/mm/dd|

RGS

&nnnnnnnn|

RGI

&ccc…ccc|

CGIc…c

&|

Description Version and date of firmware Serial number of instrument User code Sets user code to c…c (max. 34 char.)

Instrument control:

Command @

Reply &|

Info on operating

mode

Description Allows entering configuration mode if the instrument is set up in an operating mode. It must be sent within 10 s from power on.
Exits from the configuration mode activated with the command @.

Operating Mode:
Command CUMn

Reply &|

Description
Sets instrument in mode:
Configuration if n=0 (default) RS485 ASCII proprietary if n=1 RS232 ASCII proprietary if n=2 SDI-12 if n=3 NMEA if n=4 Modbus-RTU if n=5

Page 16 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Command RUM

Reply & n|

Description Reads mode set in the instrument.

Note 1: after sending the CUMn command, the instrument remains in configuration mode. Power cycle the instrument to activate the set operating mode.

Parameters for RS232 and RS485 ASCII proprietary modes:

Command CU1Ac

Reply &|

Description
Sets the address for RS485 ASCII proprietary mode to c value. The address is an alphanumeric character ranging within 0…9, a…z, A…Z. Default=0.

RU1A

& c|

Reads the address for RS485 ASCII proprietary mode set in the instrument.

CU1Bn

&|

Sets Baud Rate for RS485 ASCII proprietary
mode to:
9600 if n=3 19200 if n=4 38400 if n=5 57600 if n=6 115200 if n=7 (default)

RU1B

& n|

Reads Baud Rate setting for RS485 ASCII proprietary mode.

CU2Bn

&|

Sets Baud Rate for RS232 ASCII proprietary
mode to:
9600 if n=3 19200 if n=4 38400 if n=5 57600 if n=6 115200 if n=7 (default)

RU2B

& n|

Reads Baud Rate setting for RS232 ASCII proprietary mode.

CU2In

&|

Sets interface for ASCII mode to:
RS232 if n=0 RS485 if n=1 (default) RS422 if n=2

RU2I

& n|

Reads interface setting for ASCII mode.

CU2Mn

&|

Sets parity and stop bits (data bits = 8 fixed)
for ASCII mode to:
8N1 if n=0 8N2 if n=1 (default) 8E1 if n=2 8E2 if n=3 8O1 if n=4 8O2 if n=5

RU2M

& n|

Reads current setting of parity and stop bits for ASCII mode.

Page 17 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Command CU1Dc…c

Reply &|

RU1D CU2Rnnnn
RU2R

& c…c| &|
& nnnn|

Description Sets measurements order in the string sent in ASCII proprietary mode. In the sequence c…c, each character identifies a measurement according to the following correspondence:
0 Barometric Pressure 5 Instant speed U,V,W coordinates 6 Instant speed intensity in the U,V plane 7 Wind speed average intensity 8 Wind average direction (Azimuth) 9 Elevation angle G Wind Gust (intensity and direction) S Sound speed T Sonic Temperature C Tilt_Y, Tilt_X E Errors
Default=78TE
(see Note 2)
Reads measurements order in the string sent in ASCII proprietary mode.
Sets transmission interval of string with measurements in ASCII proprietary mode to nnnn seconds. The interval should range within 1 and 3600 seconds. Default=1 second.
Reads transmission interval of string with measurements in ASCII proprietary mode.

NOTE 2: MEASUREMENTS ORDER
In the measurement string sent by the instrument in ASCII proprietary mode, the measurements can be ordered arbitrarily; simply indicate the desired order in the sequence of characters “c…c” sent by the command CU1D. The sequence of characters “c…c” can have a variable length up to a maximum of 16 characters.
If information on error conditions is requested (E character), three numbers with the following meaning will appear in the data string sent by the instrument:
1. First number = error code identifying the transducers and the type of error.
The number consists of two digits. The first digit indicates the transducer that presents the error, according to the numbering indicated in the figure below. Zero indicates no error.

North reference hole

Page 18 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

The second digit indicates the type of error: 0 = no errors; 5 = transducer broken, electric interruption, path obstruction; Other = codes reserved to technical service.
2. Second number = heating status: 0 = off, 1 = arms heating is on, 2 = arms heating and transducers heating are both on.
3. Third number = number of invalid measurements.

Parameters for NMEA mode:

Command CU4Bn

Reply &|

RU4B CU4In
RU4I CU4Mn

& n| &|
& n| &|

RU4M CU4Rnnn
RU4R

& n| &|
& nnn|

Description
Sets Baud Rate for NMEA mode to: 2400 if n=1 4800 if n=2 (default) 9600 if n=3 19200 if n=4 38400 if n=5 57600 if n=6 115200 if n=7
Reads Baud Rate setting for NMEA mode.
Sets interface for NMEA mode to: RS232 if n=0 RS485 if n=1 (default) RS422 if n=2
Reads interface setting for NMEA mode.
Sets parity and stop bits (data bits = 8 fixed) for NMEA mode to:
8N1 if n=0 (default) 8N2 if n=1 8E1 if n=2 8E2 if n=3 8O1 if n=4 8O2 if n=5
Reads current setting of parity and stop bits for NMEA mode.
Sets transmission interval of string with measurements in NMEA mode to nnn seconds. The interval should range within 1 and 255 seconds. Default=1 second.
Reads setting of transmission interval of string with measurements in NMEA mode.

Page 19 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Parameters for Modbus-RTU mode:

Command

Reply

CU5Annn

&|

RU5A CU5Bn

& nnn| &|

RU5B CU5In
RU5I CU5Mn

& n| &|
& n| &|

RU5M CU5Wn
RU5W

& n| &|
& n|

Description
Sets Modbus address to nnn.
The address should range within 1 and 247. Default=1.
Reads the Modbus address setting.
Sets the Baud Rate for Modbus mode to: 9600 if n=3 19200 if n=4 (default) 38400 if n=5 57600 if n=6 115200 if n=7
Reads Baud Rate setting for Modbus mode.
Sets interface for MODBUS mode to: RS232 if n=0 RS485 if n=1 (default) RS422 if n=2
Reads interface setting for Modbus mode.
Sets parity and stop bits (data bits = 8 fixed) for Modbus mode to:
8N1 if n=0 8N2 if n=1 8E1 if n=2 (default) 8E2 if n=3 8O1 if n=4 8O2 if n=5
Reads the setting of parity and stop bits for Modbus mode.
Sets waiting time after transmission in Modbus mode to:
Immediate reception if n=0 (violates protocol)
Waiting 3.5 characters if n=1 (respects protocol, default)
Reads current setting of waiting time after transmission in Modbus mode.

Parameters for SDI-12 mode:

Command CU3Ac

Reply &|

RU3A

& c|

Description Sets the SDI-12 address to c value The address is an alphanumeric character ranging within 0…9, a…z, A…Z. Default=0.
Reads the SDI-12 address.

Page 20 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Units of measurement:

Command

Reply

CGUVn

&|

RGUV

n|

CGUTn

&|

RGUT

n|

CGUPn

&|

RGUP

n|

Description
Sets wind speed unit of measurement:
m/s if n=1 (default) cm/s if n=2 km/h if n=3 knot if n=4 mph if n=5
Reads the wind speed unit of measurement.
Sets temperature unit of measurement:
°C if n=1 (default) °F if n=2
Reads the temperature unit of measurement.
Sets pressure unit of measurement:
hPa (mbar) if n=1 (default) mmHg if n=2 inchHg if n=3 mmH2O if n=4 inchH2O if n=5 atm if n=6
Reads the pressure unit of measurement.

Sensor support arms heating:

Command CGHn

Reply &|

RGH

n|

Description Enables/disables heating:
Disables if n=0 Enables if n=1 (default)
Enabling status of the heating.

Note: the sensors heating cannot be disabled.

Measurement parameters:

Command CWCnnnn

Reply &|

RWC CWaLnnn
RWaL CWaMn

& nnnn| &|
& nnn| &|

Description Sets wind speed threshold to nnnn value, in hundredths of m/s. Value should range within 0 and 100 hundredths of m/s (= 0…1 m/s). Default=20 (= 0.2 m/s). (see Note 3)
Reads the wind speed threshold value, in hundredths of m/s.
Sets time interval for averaging speed and direction to nnn value. Value should range within 1 and 600 s. Default=1 s.
Reads the time interval for averaging speed and direction.
Sets the method for averaging speed and direction:
Scalar average if n=0 Vector average if n=1 (default)
(see Note 4)

Page 21 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Command RWaM CWgLnnn
RWgL CWgMn
RWgM CWgOnnn
RWgO cxd nn.n
rxd cor n ror

Reply & n| &|
& nnn| &|
& n| &|
& nnn| cxd|
Direction offset to N mark nn.n° cor|
n samples per second

Description Reads the method for averaging speed and direction.
Sets time interval for the calculation of averages in Wind Gust measurement to nnn value. Value should range within 1 and 100 s. Default=3 s (standard WMO value).
(see Note 6)
Reads the time interval for the calculation of averages in Wind Gust measurement.
Sets the method for the calculation of averages in Wind Gust measurement:
Scalar average if n=0 Vector average if n=1 (default)
(see Note 4)
Reads the method for the calculation of averages in Wind Gust measurement.
Sets time interval for detecting the maximum of the averages in Wind Gust measurement to nnn value. Value should range within 1 and 600 s. Default=60 s.
(see Note 6)
Reads the time interval for detecting the maximum of the averages in Wind Gust measurement.
Sets the magnetic declination to nn.n°. Value should range within -90.0 and +90.0, and it is used to compensate the measurement and refer it to the geographical North. Default=0.
Reads the set magnetic declination.
Sets the measurement rate to n Hz (measurements per second). Value should range within 1 and 4. Default=4.
Reads the set measurement rate.

NOTE 3: WIND SPEED THRESHOLD VALUE
If the wind speed is very low, the determination of the direction can result inaccurate. The instrument allows setting the threshold value of speed below which the direction value is frozen on the last acquired value.
NOTE 4: SCALAR AVERAGE AND VECTOR AVERAGE
Scalar average: the average intensity is calculated as average of intensities. For the calculation of the average direction, also called “prevailing direction”, the velocity versor (unit vector having the same direction of the velocity vector) is considered for each measurement, and the versor coordinates along the measurement axes are calculated, then the average of the coordinates along each axis is calculated. The average coordinates determine the average versor and therefore the average direction. The average direction is expressed according to the extended characteristic for the analog output (see Note 5).

Page 22 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Vector average: for each measurement, the coordinates of the velocity vector along the measurement axes are calculated and then the average of the coordinates along each axis is calculated. The average intensity and the average direction are those determined by the average coordinates.
NOTE 5: WIND DIRECTION EXTENDED CHARACTERISTIC With 0÷360° wind direction measuring range, the analog output continues to oscillate between maximum and minimum scale if the direction continues to slightly fluctuate around 0°:

This effect can be reduced through the extended (“wrap-around”) characteristic of direction. In this mode, the wind direction is considered as corresponding to 0÷540° range instead of 0÷360°. The wide output fluctuation occurs the first time that the wind direction goes from 0 to 359.9°; if later the “physical” direction goes back to 0°, the analog output will always remain around 360°. Using the extended characteristic, the behavior of the above graph changes into the following:

If 540° is exceeded in extended mode, the output goes to the value corresponding to 180°.
The table below shows the correspondence between the value of the analog output and the direction of the wind in the two modes.

Wind direction
0° 180° 360° 540°

4…20mA output

standard extended

4.00

4.00

12.00

9.33

20.00 14.67

—

20.00

0…1V output

standard extended

0.00

0.00

0.50

0.33

1.00

0.67

—

1.00

0…5V output

standard extended

0.00

0.00

2.50

1.67

5.00

3.33

—

5.00

0…10V output

standard extended

0.00

0.00

5.00

3.33

10.00

6.67

—

10.00

Page 23 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

NOTE 6: WIND GUST MEASUREMENT
The Wind Gust measurement is determined as follows:
· the wind speed averages (according to the method set with the CWgM command, by default vector averages) in a time interval equal to that set with the CWgL command (by default 3 seconds) are calculated continuously;
· the maximum value of the averages calculated in the previous point is detected over a time interval equal to that set with the CWgO command (by default 60 seconds); the maximum value detected is the measure of Wind Gust.

Analog outputs:
Command RAT

Reply & n|

CAFxnn

&|

RAFx CAMn

& nn| &|

Description
Reads the analog output type:
4…20/0…20 mA if n=0 0…1 V if n=1 0…5 V if n=2 0…10 V if n=3
Sets offset and direction of the analog output x (x=1, 2 or 3) to:
Standard if nn=00 (default) [ex. 4…20 mA , 0…1 V , 0…5 V , 0…10 V] Without offset if nn=01 [ex. 0…20 mA] With offset if nn=02 [ex. 0.2…1 V , 1…5 V , 2…10 V] Inverted if nn=04 [ex. 20…4 mA , 1…0 V , 5…0 V , 10…0 V] Inverted without offset if nn=05 [ex. 20…0 mA] Inverted with offset if nn=06 [ex. 1…0.2 V , 5…1 V , 10…2 V] Reads offset and direction setting of the analog output x (x=1, 2 or 3).
Association of the analog outputs:
If n= 0 (default): Output 1 = Mean wind speed. Output 2 = Mean wind direction (with extended characteristic if average is scalar). Output 3 = Not used.
If n= 1 (see Note 7): Output 1 = Instant wind speed component along V-axis. Output 2 = Instant wind speed component along U-axis. Output 3 = Instant wind speed component along W-axis.
If n= 2 (Tunnel mode, see Note 8): Output 1 = Instant wind speed component along the direction indicated by the reference on the instrument housing. Output 2 = Instant wind direction referred to the direction indicated by the reference on the instrument housing. Output 3 = Not used.

Page 24 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

Command RAM CAHn

Reply & n| &|

RAH

& n|

Description

Reads the association of analog outputs.

Associates full scale of wind speed analog output to:

5 m/s if n=0 10 m/s if n=1 15 m/s if n=2 20 m/s if n=3 25 m/s if n=4 30 m/s if n=5 35 m/s if n=6 40 m/s if n=7 45 m/s if n=8

50 m/s if n=9 55 m/s if n=10 60 m/s if n=11 65 m/s if n=12 70 m/s if n=13 75 m/s if n=14 (default) 80 m/s if n=15 85 m/s if n=16 90 m/s if n=17

Reads the value corresponding to the wind speed analog output full scale.

NOTA 7: U, V, W COMPONENTS By selecting the U, V, W components, the speed value associated to the initial scale of the analog outputs is equal to the opposite of the speed value associated to the full scale of the outputs (e.g., -75 m/s if f.s.=75 m/s).

NOTA 8: TUNNEL MODE The reference on the instrument housing should be aligned with the direction of the tunnel. The output 2 is set to full scale value if the wind blows in the direction pointed by the reference, and to initial scale value if the wind blows in the opposite direction. The initial scale of output 1 is associated to the speed value opposite to that associated to the output full scale.

Page 25 of 36

AEOLUS WUS30F – Ultrasonic anemometer

V1.1

RS232 ASCII proprietary mode

In RS232 ASCII proprietary mode, the instrument sends automatically the acquired measurements at regular intervals. The interval is factory-set to 1 second and is configurable from 1 to 3600 seconds. To change the interval, enter configuration mode and send the command CU2Rnnnn, where nnnn indicates the interval value in seconds (see chapter 5).
By default, the communication parameters are 115200, 8N2 and can be changed by using the appropriate commands of the configuration mode.
The instrument sends measurements in the following format: