SIAP+MICROS t031 TVV Guide

t031 TVV / t032 TVVR
Wind speed transducer
User Manual and maintenance

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 2Vers.: 00
Summary
1Introduction ................................................................................................................................................ 3
2Technical characteristic.............................................................................................................................. 4
2.1 Operating principle............................................................................................................................. 6
3Installation and maintenance ..................................................................................................................... 7
3.1 Installation.......................................................................................................................................... 7
3.2 Maintenance ...................................................................................................................................... 7
4Electrical connection.................................................................................................................................. 8
4.1 Connector pinout ............................................................................................................................... 8
4.2 Connection cable ............................................................................................................................... 8
4.3 Data reading in serial communication (RS485 Modbus and SDI-12)................................................ 9
4.3.1 RS485 Modbus mode .................................................................................................................... 9
4.3.2 SDI-12 mode.................................................................................................................................. 9
5Generic information ................................................................................................................................. 10
5.1 Safety............................................................................................................................................... 10
5.2 Appropriate use of the device ...........................................................................................................11
5.3 Storage .............................................................................................................................................11
5.4 Moving ..............................................................................................................................................11
5.5 Disposal information .........................................................................................................................11
6Revision history ....................................................................................................................................... 12

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 3Vers.: 00
1Introduction
TVV is composed of a rotating body connected to three conical shaped elements (cups), and it measures the
wind speed exploiting the wind resistance to rotational movement of the cups. The rotating system is equipped
with a six poles cylindrical magnet. A Hall effect sensor detects the rotary motion that generates in the
meantime an impulse at the passage of each pole.
The dimensions of the cups and the lightness of their material have been thoroughly picked to achieve a very
low mechanical inertia and, consequently, to ensure a high sensitivity of the measurement.
The structure of TVV is very robust and the sensing element has a reliable durability and a proper resistance
even at high wind speeds. Furthermore, its simple and compact design facilitates the installation and makes
easier the on-site maintenance activities.
The sensor is supplied with power and signal cable (12m), and it is available upon request on heated version,
powered at 12 or 24V (alternating or direct current).
Available models:
Natural output: ..............................................................................t031-TVV-N
Current, voltage and RS485-Modbus output:...............................t031a-TVV-IVS
SDI-12 serial output: .....................................................................t031d-TVV12
Heated sensor with natural output:...............................................t032-TVVR-N

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 4Vers.: 00
2Technical characteristic
Measurement performance
Transducer
6-pole magnet and stabilized Hall effect sensor
Measurement range
0.25 ÷ 50
Accuracy
< 0.15 o 1% of the measured value
Resolution
0.1
Operating conditions
Temperature
-40 ÷ 70 °C
Humidity
0 ÷ 100 RH%
Outputs
Natural
Open drain output: VV measurement is given
by the frequency f as following:
VV = f [Hz] / 3.3676 [Hz/ m/s] + 0.1881 [m/s]
Currente
4 ÷ 20 mA ↔0 ÷ 50 m/s
Voltage
0 ÷ 2 V ↔0 ÷ 50 m/s
RS485 MODBUS
Wind speed [m/s]
SDI-12
Wind speed [m/s]
Power supply and consumption
Voltage supply
7 ÷ 24 Vdc
Consuption
Min
Typical
Massimo
Natural
2.5
4 ÷ 20 mA
5
25
0 ÷2 V / RS485 MODBUS / SDI-12
1
3
Heating system power
40 W @ 24 V
Mechanical specifications
Housing
Cups: PA6 + 30% fiberglass, the entire body is
made of aluminium alloy and stainless steel
screws
Connector
IP67 / 7 pole male connector

User manual and maintenance
t031-di TVV-TVVR.docx
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Dimensions:
H1 - maximum: ~ 336 mm
P1 – depth cup: 35 mm
D1 - cup diameter: 70 mm
Di1 - maximum diameter: 228 mm
Sensor parts:
A – Anodized aluminum body
B – Cups in nylon (PA6 + 30% glass fiber)
C – Stem ø40mm
Weight: 750 g

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 6Vers.: 00
2.1 Operating principle
The 3 cups at the top of the sensor rotate clockwise. When the wind blows the movement is transmitted by a
steel shaft inside the sensor body, on the end of the shaft a 6-pole magnet is fixed, which rotates together with
the shaft. The rotation of the magnet is detected by a Hall effect sensor generating a pulse. In the version
provided with the frequency output the impulse is brought directly to the connector. In the other versions, an
electronic interface carries the other different types of output to the connector. In the heated version (only with
frequency output) the heating is achieved with power resistances inserted directly into the aluminum body and
powered externally.
TVV-IVS /TVV-I/V/S with a 4÷20mA,0÷2Vdc, RS485 output
TVV-N / TVVR-N with frequency output
TVVR-X heated

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 7Vers.: 00
3Installation and maintenance
3.1 Installation
Before installing the sensor, unpack it from the package and
assemble it by screwing the upper part (with the 3 cups) on the
sensor body until it is completely blocked.
To install a meteorological station, it is necessary to pay
attention to the characteristics of the site since the conformation
of the ground and the proximity to possible obstacles can have
influence on the quality of the data we want to acquire. It’s
important to know that any vertical obstacle as for instance trees
and buildings, create a turbulence of air equal to ten times their
height. For example, a meteorological station must be installed
100 meters away from any obstacles tall 10 meters height.
The TVV transducer is normally positioned (according to WMO
standards) at a height of about 10 meters from the ground level. Normally, in Siap+Micros weather stations, it
is installed with brackets equipped with 40mm diameter U-bolts (sensor stem diameter) fixed to the pole.
Here is represented a typical installation of the sensor using a
U-Bolt 40mm diameter.
3.2 Maintenance
The transducer does not require ordinary maintenance, but it is recommended to periodically check the proper
functioning of the internal bearings that are not seized. This operation is carried out by rotating the cups by
hand checking that the movement is uniform and sensitive. Otherwise it is recommended to replace the sensor
and go for a factory check.

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 8Vers.: 00
4Electrical connection
4.1 Connector pinout
Pin
Natural
output
IVS output
SDI-12
output
Heated version
1
Vcc
A-RS485
A-RS485
Vcc
2
OUT OPEN
DRAIN
B-RS485
B-RS485
OUT OPEN
DRAIN
3
n.c.
+0÷2 Vdc
SDI-12 (data)
n.c.
4
GND
+4÷20 mA
+4÷20 mA
GND
5
n.c.
-4÷20 mA
-0÷2 Vdc
-4÷20 mA
n.c.
6
n.c.
Vcc
SDI-12 (Vcc)
V Risc
7
n.c.
GND
GND
V Risc
4.2 Connection cable
The connection cables supplied with the sensors are made with circular connectors with housing, 8 x 0.22
mmq cable (N, IVS and SDI-12 versions) or 6 x 0.22 mmq + 2 x 2.5 mmq (in the heated N version), shielded
and ferrules for connection to the data logger terminals. The shield is connected to the general ground lead.
8 poles cable (8x0.22 mmq)
Pin
1
2
3
4
5
6
7
7
Cable
Red
White
Green
Black
Orange
Yellow
Blue
Brown
TVV-N
Vcc
(supply)
OUT OPEN
DRAIN
n.c.
GND
(supply)
n.c.
n.c.
n.c.
n.c.
TVV-IVS
A-RS485
B-RS485
+0÷2 Vdc
+4÷20 mA
-0÷2 Vdc
-4÷20 mA
Vcc
GND
GND
TVV-12
A-RS485
B-RS485
SDI-12
(Data)
+4÷20 mA
-0÷2 Vdc
SDI-12
(Vcc)
GND
GND
6 poles cable 0.22 mmq + 2 poles 2.5 mmq
Pin
1
2
3
4
5
6
7
7
Cable
Blue
White
Green
Black
Yellow
Blue
(2.5mmq)
Brown
(2.5mmq)
Red
TVVR-N
Vcc
(sign.)
OUT OPEN
DRAIN
n.c.
GND
(sign.)
n.c.
V Risc
V Risc
GND

User manual and maintenance
t031-di TVV-TVVR.docx
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4.3 Data reading in serial communication (RS485 Modbus and SDI-12)
Sensors with RS485 Modbus or SDI-12 output send data only upon specific request from the PC, data logger
or PLC.
The correct communication parameters of the device performing the data retrieve are shown below..
4.3.1 RS485 Modbus mode
COM setting: 9600 baud, no parity, 8 data bit, 1 bit di stop.
Compliant with ModBus RTU protocol, function supported: “03 – read Holding Registers” e “04 – Read Input
Registers”.
Data type: “2 registers swapped float IEEE 754 in the form CDAB where A is the most significant byte of the
float and D is the less significant byte of the float (swapped float)”.
ID
Registers
Units
Reg. 1-2
Reg. 3-4
Reg. 5-6
Reg. 7-8
Reg. 9-10
Reg. 11-12
Reg. 13-14
1
1
m/s
Wind Speed
-
-
-
-
Diagnostic
Supply Voltage
4.3.2 SDI-12 mode
COM settings: 1200 baud, even parity, 7 data bit, 1 bit di stop.
Supported commands (a = sensor adress):
?! address query
aI! ID submission
aM! measurement start
aC! simultaneus measurement start
aD0! data send
a
Position
Units
Decimals
Position 1
Position 2
Position
3
Position 4
Position 5
Position 6
Position
7
1
1
m/s
1
Wind Speed
Diagnostic
Supply
Voltage
-
-
-
-

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 10 Vers.: 00
5Generic information
The qualitative level of our instruments is the result of a continuous evolution of the product. This may cause
slight differences between what is reported in the manual and the instrument you have purchased.
Siap+Micros S.p.A. reserves the right to modify without notice technical specifications and dimensions to adapt
them to the needs of the product.
5.1 Safety
Please read these safety instructions carefully before using this product:
•The warranty will be void in the case the product is used differently from the instructions described in
this manual.
•Any sign of tampering will void the warranty
•Use the devices only according to the instructions (environmental management, operation, wiring,
installation, etc.) provided in this manual
•The correct and safe operation of the device can only be guaranteed if the transport, storage, operation
and management of the device are properly performed. This also applies to the product maintenance.
•The device shall not be exposed to aggressive chemicals or solvents that could damage the plastic
casing and/or corrode the metal parts.
•Maintenance should only be performed by qualified and well trained personnel.
It is appropriate to carry out a careful risk assessment in relation to the context of installation and use of the
device by the end user considering the entire meteorological station without being limited to the sensor.
The instruments must be installed properly, making sure that the equipment complies with the applicable
regulations, the bracket must be correctly sized by qualified technicians and designed for the specific
application.
During the installation the suitability of the surrounding environment and compliance with local safety
regulations must be checked.
The manufacturer declines all responsibility in case of failure due to negligence of the instructions, tampering,
uses not described in this manual, improper use, use by operators not trained.
Read the instructions and intended use carefully and be sure you understand before installing the device
Before starting the activities, check the integrity of the instrument to be installed, prepare the equipment
necessary for the operations and wear the necessary PPE.
Take adequate measures to prevent the access of foreign personnel (untrained and uninformed) during the
installation, maintenance or replacement of the instrument.
Take precautions to avoid falling objects, both during the installation phases and during the operation of the
instrument.
Do not perform any activity in bad weather conditions.

User manual and maintenance
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During maintenance, specifically in case the station is not frequently visited, visually check for the absence of
dangerous insects and, if not, use suitable insecticides.
Consider the presence of any animals near the station. If so, pay attention to them.
Use only SIAP+MICROS original spare parts.
The instrument is not classified suitable (according to Directive 2014/34/EU) for use in atmospheres with
potential explosion risk pursuant to Directive 99/92/EC.
SIAP+MICROS strives to minimize health and safety risks in all phases of the instrument's life, including
installation, use, maintenance, decommissioning and disposal.
5.2 Appropriate use of the device
Use the instrument for its intended purpose, do not use it for any other purpose or cause malfunctions and/or
damage.
5.3 Storage
If you do not plan to use the equipment for an extended period of time (at least one year) disconnect all cables
from the equipment, place them in a clear plastic bag along with a bag of desiccant salts and seal the bag with
tape. Put appropriate indication on the bag of the contents and weight of the equipment by inserting the wording
"HANDLE WITH CARE".
The instrument must be stored in a protected environment with a temperature between 0°C and 60°C with a
humidity not exceeding 80%. Make sure that the instrument is stored in a stable position and that it cannot be
damaged or moved by inexperience or carelessness. Do not stack other tools or weights. Do not place the
instrument on top of other instruments and in any case ensure the solidity and stability of the underlying
support.
Do not display and stock the instrument in environments where corrosive gas may be present.
5.4 Moving
In order to avoid any damage to the device during transportation, please keep it in upright position without
shaking.
5.5 Disposal information
Electrical and electronic equipment marked with specific symbol in compliance with 2012/19/EU
Directive must be disposed of separately from household waste. European users can hand them
over to the dealer or to the manufacturer when purchasing a new electrical and electronic
equipment, or to a WEEE collection point designated by local authorities. Illegal disposal is
punished by law.
Disposing of electrical and electronic equipment separately from normal waste helps to preserve natural
resources and allows materials to be recycled in an environmentally friendly way without risks to human health.

User manual and maintenance
t031-di TVV-TVVR.docx
19/05/2023 12 Vers.: 00
6Revision history
The following table shows the description of the changes made to this document.
Version
Data
Aggiornamenti
00
19/05/2023
First version of the document.
All the information content in this document are the current available at the printing phase. Siap+Micros S.p.A. reserve the rights to change
the specifications without any advance notice.