AF across ats 22
AF across ats 36
Pg21 (Ø28 mm)
Plug
• Potentiometric wind direction transmitter
• Full range 0 ... 360°
• High quality potentiometer 0 ... 2 kΩ
Measurement principle
With the help of a potentiometer the physical property is converted into an ana-
logue resistor output signal. At zero the transducer has to pass the „north transi-
tion“ between the margins of zero and 2 kΩ. Wind direction signal conditioning and
data processing in all Ammonit data acquisition systems carefully pays attention
to this speciality. The wind vane can be equipped with an electronically regulated
heating system in order to prevent ice from the bearings. To use this heating the
connection cable must have additional cores and you should provide a sufcient
power supply (mains connection).
Mounting
The sensor can easily be screwed on a piece of steel tube (outer diameter 35 mm,
wall thickness 5 mm) with an inner thread for PG21 or mounted to a traverse with
a drill of 29 mm. The sensor cable is located weather protected in the inner tube.
Please pay attention to the proper orientation of the „N“-mark towards north.
When mounting the sensor please note that you never turn the sensor at the
aluminium tube because this can be opened. To x and to loosen the lock nut the
sensor must be hold with a screw spanner (SW 22) above the thread!
To avoid damage due to lightning a protection rod and proper grounding of all
metal parts is to be recommended.
Maintenance
When mounted properly, the wind vane operates almost maintenance-free. Dust
or dirt may clog the space between the rotating parts and the shaft. Therefore you
should check for plausibility of measurement results at regular terms and clean
the device if necessary. In true long-term operation (years) the bearings may be
subject to wear and tear showing delayed start-up behaviour or even stand-still
of the vane. Should such a defect occur we would recommend that you return the
instrument for repairs.
Wind Vane Thies Compact POT (Plug)
page 1/3
Dimensional drawing
Wind Vane Thies Compact POT (Plug)
Specications
Characteristic Description / Value
Measuring range 0 ... 360°
Measuring accuracy ± 2°
Survival speed max. 80 m/s, 30 min
Ambient temperature -40 ... +70 °C
Measurement principle Potentiometer 2 kΩ
Resolution 0.5°
Starting threshold
≤ 1 m/s according to ASTM-Standards D5366-96
≤ 0.4 m/s
according to VDI-Standard 3786 Part 2
Delay dis
tance < 2.5 m acc. ASTM D 5366-96
Electrical supply
Potentiometer
Voltage U
s
: 0 ... 24 VDC
Important:
The supply voltage of the potentiometer must show a current limitation of max.
1 mA. An additional protective resistance is strongly recommended.
Resistor Rv: 15 kΩ @ supply voltage: 12 ... 15 V
Heating 24 VDC/AC (Power consumption: max. 20 W)
Connection 7-pole plug
Mast xture Mounted on a steel tube with an inner thread of PG21 or
mounted on a traverse with a drill of 29 mm
Material Aluminum, stainless steel and plastic (Housing and wind vane)
Type of ball bearings Metallic ball bearings
Protection IP 55
Weight approx. 0.4 kg
Manufacturer Thies
Accessories Module M83200 or M83570
page 2/3
Wind Vane Thies Compact POT (Plug)
Sensor connection to Ammonit Meteo-40 data logger
Sensor Plug Pin No.
Ammonit Cable
Wire Colour
Meteo-40
Analog Voltage
Supply
Sensor
Supply Voltage 4 white A
x Sense
Ground 1 blue B
x
Wind Direction Data 3 brown Ax+1
Ground 1 pink Bx+1
Supply 5 red
12 ... 15 V / 1 mA
Rv: 15 kΩ
Ground 2 black Main Ground
Heating
6 orange, orange
24 VAC/DC
7 viol
et, violete
Cable type without heating: LiYCY 6 x 0.25 mm²
Cable type with heating wires: LiYCY 10 x 0.25 mm²
Connect the shield logger-sided to Ground (GND)
page 3/3
Sensor connection diagram to Ammonit Meteo-40 data logger
