LSI LASTEM DNA301.1 User manual

INSTUM_00190 Page 1/12
Environmental monitoring solutions
Wind speed sensors
User’s manual
Updated 07/06/2021

Wind speed sensors –User’s manual
INSTUM_00190 Page 2/12

Wind speed sensors –User’s manual
INSTUM_00190 Page 3/12
Index
1 Description................................................................................................................................................. 4
1.1 Main features .................................................................................................................................... 4
1.2 Models and technical specifications.................................................................................................. 4
1.2.1 Standard sensor......................................................................................................................... 4
1.2.2 Compact sensor......................................................................................................................... 5
2 Assembly instructions................................................................................................................................ 5
2.1 Mounting standard sensor (DNA80x, DNA30x)................................................................................. 6
2.2 Mounting compact sensor (DNA202.1)............................................................................................. 7
3 Connections and transfer formula ............................................................................................................ 8
4 Maintenance.............................................................................................................................................. 9
4.1 Testing ............................................................................................................................................... 9
4.2 Periodic maintenance........................................................................................................................ 9
5 Accessories / Spare parts......................................................................................................................... 10
5.1 Sensore DNA202.1........................................................................................................................... 10
5.2 Sensori DNA30x.1, DNA80x ............................................................................................................. 10
6 Conformity declarations.......................................................................................................................... 11

Wind speed sensors –User’s manual
INSTUM_00190 Page 4/12
1Description
1.1 Main features
The tacho-anemometer is a sensor for measuring wind speed. The tachymetric system consists of a 32
notch rotating disc with optoelectronic reading. The electrical signal is made up of a series of pulses with
frequencies that are proportional to the speed of the rotor mounted on the sensor transducer. In the
heated versions, a thermostat controls a heater that keeps the rotor moving effectively in case of freezing.
The sensor range includes versions with "normalized" output (4÷20 mA, 0÷20 mA, 0÷5 Vdc) and with direct
output (Hz). Sensor with direct output can be connected to LSI LASTEM acquisition systems, or any other
device using such kind of input.
The sensor is made up by the transducer and rotor. Connection cable should be included in the supply (see
§5).
1.2 Models and technical specifications
1.2.1 Standard sensor
Order numb.
DNA301.1
DNA302.1
Measuring range
0÷75 m/s
Output
0÷883 Hz
Power supply
10÷30 Vac/dc
-
Heater (power supply)
NO
YES (24 Vac)
Heater operative temperature
-
-20÷4 °C
Power consumption
20 mA
20 W (heater)
Data logger compatibility
M-Log (ELO008), R-Log (ELR515), E-Log, A-Log (with ALIEM)
Order numb.
DNA801/801.1
DNA802
DNA805
DNA806
DNA807
Measuring range
0÷50 m/s (0÷60 m/s DNA801.1)
Output
4÷20 mA
0÷20 mA
0÷5 Vdc
Power supply
10÷30 Vac/dc
-
10÷30 Vac/dc
-
10÷30 Vac/dc
Heater (power supply)
NO
YES (24 Vac)
NO
YES (24 Vac/dc)
NO
Heater operative temp.
-
-20÷4 °C
-
-20÷4 °C
-
Power consumption
0.5 W
0.5 W +
20 W (heater)
0.5 W
0.5 W +
20 W (heater)
0,5 W
Data logger compatibility
M-Log (ELO008), R-Log (ELR515), E-Log, A-Log
Common features
Wind speed
Principle
Optoelectronic with 32 step disk
Accuracy
0.25 m/s or 3% (0÷25 m/s), 2% (> 25 m/s)
± 0.1 m/s or ±1% (using transfer formula)
Threshold
0.26 m/s
Resolution
0.06 m/s
Delay distance
4.8 m (@ 10 m/s). According to VDI3786 and ASTM 5096-96
General
Damage limit
75 m/s
Connector
7 pin IP65 watertight connector
Housing
Anodized aluminum
EMC
EN 6132-1 2013
Protection
IP66
Operative temperature
-35÷70 °C (without ice)
Mounting
Mast ø 48 ÷ 50 mm

Wind speed sensors –User’s manual
INSTUM_00190 Page 5/12
1.2.2 Compact sensor
DNA202.1
Wind speed
Principle
Relay Reed
Measuring range
0÷75 m/s (damage limit)
Accuracy
± 0.5 m/s (0÷10 m/s), 2.5% (>10 m/s)
± 0.1 m/s or ±1% (using transfer formula)
Threshold
0.5 m/s
General
Output
N. 6 pulses/round, 2.6÷2.8 Hz x m/s
Max. load
5 mA@12 Vdc
Connector
7 pin IP65 watertight connector (not included, see Accessories)
Cable
Compatibility with DWA5xx cable (not included, see Accessories)
Housing
Anodized aluminum
Operative temperature
-35÷70 °C (without ice)
Protection
IP66
Mounting
Mast ø 48÷50 mm
Data logger compatibility
M-Log (ELO008), R-Log (ELR515), E-Log, A-Log (with ALIEM module)
2Assembly instructions
The tacho-anemometer can be assembled either alone or coupled with the gonio-anemometer by mean of
the DYA046 coupling bar.
Select a well-exposed spot for the instrument. The WMO (World Meteorological Organization) suggests
that the instrument should be assembled 10 m off the ground; in a place where the distance between the
sensor and surrounding obstacles which might disturb the measurements is at least 10 times the height of
those objects from the ground. As such a position is difficult to find, the WMO suggests that the instrument
should be assembled in a spot which is reasonably uninfluenced by local obstructions.

Wind speed sensors –User’s manual
INSTUM_00190 Page 6/12
2.1 Mounting standard sensor (DNA80x, DNA30x)
Unscrew the nut and washer from the shaft thread.
Mount the DNA204 wind rotor on the sensor’s
body. Keep the shank in a steady position and
insert the rotor until it goes to the nut adjustment.
Tighten the screw of the rotor (indicated by the
arrow) and the cover. Attention: don’t leave the
sensor in outdoor operation without its rotor.
Connect the cable to the sensor.
See Part 3. Connections
Mount the sensor on the mast and tighten the
screw (indicated by the arrow).

Wind speed sensors –User’s manual
INSTUM_00190 Page 7/12
2.2 Mounting compact sensor (DNA202.1)
Unscrew the screw from the shaft thread.
Mount the DNA207 rotor on the sensor’s body.
Tighten the screw of the rotor. Attention: don’t
leave the sensor in outdoor operation without its
rotor.
Connect the DWA5xx cable to the sensor. If you do
not have the DWA5xx cable but the MG2251
connector, build the cable as indicated below.
Fix the cable (n.3 wires) on the connector D: screw
each wire (indicated by the arrow) on the
correspondent connector pin as in the above
drawing.
Open the MG2251 free connector. Pass the cable as
in the picture above, select the rubber ring B (ø 6 or
9 according to the cable dimension).
Attention to the colour of the wires when
connecting the sensor to the data logger.

Wind speed sensors –User’s manual
INSTUM_00190 Page 8/12
If instead the DNA202.1 sensor replaces the DNA202
sensor, connect the existing cable to the new sensor
using the CCDCA0003 adapter.
Finally, mount the sensor on the mast and tighten
the screws (indicated by the arrows).
3Connections and transfer formula
For the wiring connection, read the following drawings:
DNA202.1 DISACC 200013
DNA301.1 DISACC 190005
DNA302.1 DISACC 07034
DNA801 DISACC 200048
DNA801.1 DISACC 200046
DNA805 DISACC 200037
DNA806 DISACC 200038
Cable DWA5xx DISACC 3217
Transfer Function Table
for DNA202 sensor
Transfer Function Table
for DNA30x sensors
Speed (m/s)
Frequency (Hz)
Speed (m/s)
Frequency (Hz)
1.002
2.13
1.02
12.08
5.077
12.23
5.07
69.00
10.150
25.1
10.15
141.00
15.172
37.25
25.15
353.50
20.194
50.07
45.52
638.80
25.216
63.27
58.46
828.80
30.310
75.4
40.503
102
45.599
115
50.576
126.3
60.530
152.2

Wind speed sensors –User’s manual
INSTUM_00190 Page 9/12
4Maintenance
4.1 Testing
This type of testing is only required if the user wishes to verify the well functioning of each part of the
instrument. Please note that these tests are not intended to establish the operational limitations of the
instruments.
Visual check
-body of the sensor is in a level position.
-Rotor is not broken or deformed.
Mechanical check
Having removed the rotor, check that the conical pin (Compact version) or the shaft thread (Standard
version) on which the rotor rotates moves freely and perfectly smoothly. If not bearings replacement is
needed.
Output operational check (only for instruments with analogue output)
Connect the system (power on the power supply) to the signal output reader and measure the wind
speed with the following results:
Sensor output
Speed (m/s)
N. rounds/s
Output
4÷20 mA
2.37
1
4.76 mA
0÷20 mA
2.37
1
0.95 mA
0÷5 Vcc
2.37
1
237 mV
Heater check (for heated sensor only):
•Remove the cup from the body of the sensor;
•Leave the sensor in a freezer for 3/4 hours at a temperature below 2 °C;
•Connect a multimeter to the ends of cables 6-Red 5-White for DNA302 or 1-Brown 6-White for
others;
•Under these conditions, the resistance recorded should be approx. 40 Ω.
4.2 Periodic maintenance
•Clean the sensor, attention to the space between the transducer and the cup.
LSI LASTEM suggests to check the instrument calibration at least every 2 years.

Wind speed sensors –User’s manual
INSTUM_00190 Page 10/12
5Accessories / Spare parts
5.1 Sensore DNA202.1
Codice
Descrizione
DYA046
Coupling bar for WS+WD sensors on ø 45 ÷65 mm pole
DWA505
Cable L = 5 m
DWA510
Cable L = 10 m
DWA525
Cable L = 25 m
DWA526
Cable L = 50 m
MG2251
Free female 7 pin watertight connector
DNA207
Spare part: vane
MM2001
Spare part: bearing
SVICA2203
Calibration certificate according to ISO9000 (wind speed)
SVACA2216
Calibration certificate according to ISO17025-ACCREDIA (wind speed)
DEA420.1
STB –Signal Transducer Box (Output: 4÷20 mA, Power supply: 10÷30 Vac/dc)
MDMMA1010.1
MSB –Modbus Sensor Box (Output RS-485 Modbus-RTU, Power supply: 10÷30 Vac/dc)
CCDCA0502
Cable L = 5 m with connectors for interconnection between Head Shield Master unit and
DNA202.1 anemometer
CCDCA0003
Adapter to connect the DNA202’s cable to the DNA202.1 sensor
5.2 Sensori DNA30x.1, DNA80x
Codice
Descrizione
DYA046
Coupling bar for WS+WD sensors on ø 45 ÷65 mm pole
DWA505
Cable L = 5 m
DWA510
Cable L = 10 m
DWA525
Cable L = 25 m
DWA526
Cable L = 50 m
DWA527
Cable L = 100 m
MG2251
Free female 7 pin watertight connector
DNA204
Spare part: vane
MM2015
Spare part: bearing
SVICA2203
Calibration certificate according to ISO9000 (wind speed)
SVACA2216
Calibration certificate according to ISO17025-ACCREDIA (wind speed)