• New and improved version of First Class wind vane
• High level of measuring accuracy (0.5°) and resolution (0.35°)
• Output: 10-bit serial-synchronous (compatible with Ammonit Meteo-40 data loggers)
• Measurement range 0 ... 360°
• Low current consumption (3.3V @ 1.4 mA)
Description
The wind vane serves for the detection of the horizontal
wind direction in the eld of meteorology and environmental
protection. The axis of the wind vane is running in ball bear-
ings and carries a diametrically magnetized magnet at the
inner end. The angle position of the axis is scanned contact-
free by a magnetic angle sensor (TMR-Sensor, Tunnel Mag-
neto Resistance) through the position of the magnet eld.
As the sensor is operated the magnetic saturation, effects
by external magnetic elds can almost be eliminated. The
connected electronics calculated the angle position of the
axis and provides the respective serial-synchronous output
signal.
Benets of Thies TMR wind vanes
Thies TMR wind vanes have a clear advantage towards po-
tentiometer wind vanes in terms of accuracy and reliability.
Wind vane Accuracy
Thies First Class TMR ± 0.75°
Thies First Class Potentiometer ± 1°
Wind Vane Thies First Class TMR
Dimensional drawing
Additionally TMR wind vanes do not have a north gap and
thanks to their solid state design they are subject to less
mechanical wear that potentiometer wind vanes. TMR wind
vanes do not have moving parts, except the bearings.
Mounting
Mount the wind vane onto a pipe socket of 1“ (Ø 33.4 mm)
and a length of at least 25 mm. The pipe socket must have
an inner diameter of at least 25 mm depending on the plug.
The wind vane is connected electrically with a plug. Set the
sensor onto the pipe socket, and x it on the mast or tube
(2x M6 Allen head screws, female hexagon).
To avoid damage due to lightning, a protection rod, adapt-
ers of POM for isolated mounting and proper grounding of
all metal parts is recommended.
Refer to the next page for connection recommendations for
the cable shield.
page 1/4
Wind Vane Thies First Class TMR
Specications
Characteristic Description / Value
Measurement principle Magnetic
Measurement range 0 ... 360°
Accuracy ± 0.75°
Resolution 0.35°
Survival speed max. 85 m/s, 30 min
Starting threshold < 0.5 m/s at 10° amplitude (acc. to ASTM D 5366-96)
< 0.2 m/s at 90° amplitude (acc. to VDI 3786 Part 2)
Delay distance < 1.8 m (acc. to ASTM D 5366-96)
Damping ratio D > 0.3 (acc. to ASTM D 5366-96)
Quality factor K > 1
Output 10-bit serial-synchronous (compatible with Ammonit Meteo-40 data loggers)
Operating voltage 3.3 ... 42 VDC
Operating voltage heating 24 V DC/AC, 45 ... 65 Hz (galvanically isolated from housing), max. 25 W
Ambient temperature -50 ... +80 °C
Connection 8-pole plug connection for shielded cable in the shaft
Mounting Mounting on mast 1” (DIN EN 10255; 1”= Ø 33.4 mm)
1 ½” with separate adapter (optional)
Material Aluminum
Type of ball bearings Metallic ball bearings
Weight approx. 0.7 kg
Protection IP 55
Manufacturer Thies
Wind vane assembly
Before the sensor can be installed at its selected site, it has to be assembled.
Tools are not required!
1. Remove the wind vane housing from the packaging
2. Remove cap by counter-clockwise rotation.
3. Remove wind vane from packaging.
4. Assemble the wind vane on the housing as shown in the picture.
5. Wind vane rotate until it falls into the guide.
6. Put the cap on the thread, and tighten it manually by strong clockwise
rotation.
Do not use tools!
Remark
The wiring has to be prepared in a way that plug and cable will be pushed through the instrument carrier, mast, tra-
verse etc. and can be connected to the sensor at mechanical mounting.
page 2/4
Wind Vane Thies First Class TMR
Connection recommendations for the cable shield
Sensor carrier Sensor Shielding / Ground
Metallic met mast, grounded Non-isolated mounting on the met
mast (e.g. by using metallic brackets,
holders, etc.)
Connect cable shield only at the side of
the data logger to ground.
Metallic met mast, grounded Isolated mounting at the met mast (e.g.
by using non-metallic brackets, holder
etc. or metallic brackets, holders etc.
with isolated plastic adapters)
Connect cable shield at sensor plug and
at the side of the data logger to ground.
Metallic met mast, non-grounded
(not recommended by Ammonit)
Non-isolated mounting on the met
mast (e.g. by using metallic brackets,
holders etc.)
Sensor connection to Ammonit Meteo-40 data logger
Sensor Plug Pin No. Ammonit Cable Wire Colour Meteo-40 Digital Supply Sensor
Wind Direction Data 5 white IN
Clock 4 blue CLK
Supply 3 red 9 ... 36 V*
Ground 2 black Main Ground
Heating
7 orange, orange
24 V AC/DC
8 violet, violet
* Supply voltage for usage with Meteo-40 data loggers. Cable type without heating: LiYCY 4 x 0.25 mm²
Cable type with heating wires: LiYCY 8 x 0.25 mm²
Sensor connection diagram to Ammonit Meteo-40 data logger
page 3/4
Wind Vane Thies First Class TMR
Plug and cable assembly
Coupling socket, Type: Binder, Serial 423, EMC with cable clamp
Cable connection: WITH cable shield
1. Stringing parts on cable acc. to plan given above.
2. Stripping cable sheath 20 mm
Cutting uncovered shield 15 mm
Stripping wire 5 mm
A) Putting shrink hose or insolation tape
between wire and shield
B) If cable diameter permits, put the shield
backward on the cable sheath.
3. Soldering wire to the insert, positioning shield in
cable clamp.
4. Screwing-on cable clamp.
5. Assembling remaining parts acc. to plan above.
6. Tightening pull-relief of cable by screw-wrench
(SW16 and 17).
A)
B)
Cable connection: WITHOUT cable shield
1. Stringing parts on cable acc. to plan given above.
2. Stringing cable sheath 20 mm
3. Cutting uncovered shield 20 mm
4. Stripping wire 5 mm
5. Soldering wire to the insert.
6. Positioning shield in cable clamp.
7. Screwing-on cable clamp.
8. Assembling remaining parts acc. to plan above.
9. Tightening pull-relief of cable by screw-wrench
(SW 16 and 17).
page 4/4
Seal Coupling ring Female insert
Cable clamp
Sleeve
Cable-pull-relief
Seal Thrust collar
Pressing screw
Cable shield
Shield
Cable clamp
Wire
Cable shield
Cable clamp
Wire
