Operating Manual

ventus

12 G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Figure 1:

Fastening to

the Mast

9 Installation

The sensor bracket is designed to be installed on the top of a mast with a diameter of 50mm

or 2”.

The following tools are required for the installation:

 Hexagon socket 4.0

 Compass for aligning

ventus

to the North

9.1 Fastening

 Loosen nuts

 Push the sensor onto the top of the mast from above

 Align the sensor to the North

 Tighten both nuts evenly and secure with locking varnish

Mast tube

Nuts

approx. 150 mm

approx. 170 mm

page 1/3

Ultrasonic Anemometer Lufft V200A-UMB

Description

Extremely precise and maintenance-free measurement of wind velocity and wind direction as well as calculation of

acoustic virtual temperature. The ultrasonic wind sensor is seawater-resistant and designed without mechanical parts

as they have been used with traditional “cups and vanes”. The sensor is heated to remove frost and ice formation from

the sensor.

The digital or analog output delivers instantaneous, average, min or max value with exible measuring rate. We recom-

mend using the Modbus RTU protocol for applications with Ammonit Meteo-40 data loggers.

Wind speed and direction

The wind measurement element uses 4 ultrasound sensors which take cyclical measurements in all directions. The

resulting wind speed and direction are calculated from the measured run-time sound differential.

Virtual temperature

Due to the physical relationship between the velocity of propagation of sound and the air temperature, the approximate

ambient temperature can be determined with the aid of ultrasound sensors.

Air pressure

The air pressure is measured by an integrated air pressure sensor.

• Robust design and precise measurement of wind

speed, wind direction, air pressure and calculation

of acoustic virtual temperature

• Maintenance-free - no mechanical parts

• Ideal for renewable energy applications

• Heating for use in cold weather climates

• Plastic housing

Dimensional drawing

Ultrasonic Anemometer Lufft V200A-UMB

Specications

Wind Speed

Measuring range 0 ... 90 m/s

Accuracy ± 0.3 m/s or 3 % (0 ... 35 m/s) RMS, ± 5 % (>35 m/s) RMS

Resolution 0.1 m/s

Wind Direction

Measuring range 0 ... 359.9 °

Accuracy < 3 ° RMSE > 1.0 m/s

Resolution 0.1°

Air Pressure

Principle MEMS capacitive

Measuring range 300 ... 1200 hPa

Accuracy ± 1.5 hPa (0...40 °C)

Resolution 0.1 hPa

Virtual Temperature

Measuring range -50 ... 70 °C

Accuracy ± 2.0 K (without heater and without solar irradiation or wind speed > 4 m/s)

Resolution 0.1 °K

Data Output Digital

Interface RS485 Half-/Full-duplex, isolated

Baud rate 1200 ... 57600

Meas. rate instant. value 1 ... 10 s

Meas. Avg (arith., vec.), Min, Max 1...10 min

Status Heating, sensor failure

Data Output Analog

Data output analog Half-duplex mode

Output signal 0 ... 20 mA, 4 ... 20 mA, 0 ... 10 V, 2 ... 10 V,

2 ... 2,000 Hz (instantaneous, avg, min, max)

Load Max. 300 Ω

Resolution 16 bit

General

Bus operation Up to 32 devices

Operating voltage Power supply electronics:

Power supply electronics + heating:

12 ... 24 VDC ±10%

50 mA

900 mA

Electrical connection 8-pole plug

Ambient temperature -40 ... 60 °C (with heating) / -20 ... 60 °C (without heating)

Dimensions and weight Ø approx. 150 mm, height approx. 170 mm / approx. 0.8 kg

Protection type IP66

Manufacturer G. Lufft Mess- und Regeltechnik GmbH

Ammonit Meteo-40 RS485-M (Half-duplex, 2-wire)

Accessory Module set M83575 (set includes module M83570 and isolated repeater

M84100)

page 2/3

Sensor connection diagram to Ammonit Meteo-40 data logger

Ultrasonic Anemometer Lufft V200A-UMB

page 3/3

Sensor connection to Ammonit Meteo-40 data logger

Sensor Plug

Pin No.

Ammonit Cable

Wire Colour (I)

Ammonit Cable

Wire Colour (II)

Meteo-40

RS485 M

Supply

Sensor

TXD/RXD- 2 brown brown RS485 A (-)

TXD/RXD+ 5 white white RS485 B (+)

Control 3 green green

AGND 6 yellow yellow GND

Supply / Heating 8 red, pink black 1,2 H1: 12 ... 24 VDC

Ground 7 blue, grey black 3,4 H2: GND

Connect the shield logger-sided to Ground (GND)

(I) Cable type without heating: LiYCY 4 x 2 x 0.25 mm²

(II) Cable type with heating wires: CP 4 x 0.75 mm² + 2 x 2 x 0.14 mm²