page 1/3
Dimensional Drawing
AF across ats 22
AF across ats 36
Pg 21 (Ø28mm)
Plug
• Opto-electronic wind speed sensor
• “Low Power” - Frequency output signal
• Range 0.5 ... 50 m/s
• Resolution < 0.1 m/s
Measurement principle
The cup star is set into rotation by the wind. An opto-electronic speed scan-
ning produces a frequency, which is, proportional to the wind speed, available
as output signal. The anemometer is equipped with an electronically regulated
heating system in order to prevent ice from the bearings.
Mounting
Anemometer Thies Compact
When using fastening adaptors, remember that turbulences could possibly inuence the characteristic curve. You
should use a tube with a length of 350 mm, an outer diameter of 35 mm and a wall thickness of 5 mm. Cut an inner
thread (PG 21) in the upper end of the tube (min. 13 mm). For mounting leave one hexagonal nut (SW36) at the anemo-
meter and pass the cable through the tube. The thread of the anemometer has to be screwed into the tube until there
is still enough free space to x it with the nut.
When mounting the sensor, 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!
The anemometer should be mounted principally at the top of a mast to be free in all directions. Only a lightning protec-
tion rod mounted below must overtop the sensor. If an anemometer has to be mounted on a traverse, the length must
be at least 7 times the length of the mast diameter.
Maintenance
The anemometer requires only low maintenance thanks to
its low-inertia and ball-bearing cup star. Dust or dirt may
clog the space between the rotating parts and the shaft.
Check the plausibility of the measurement results at regular
terms and clean the device, if necessary.
In true long-term operation (years) the bearings may be sub-
ject to wear and tear showing delayed start-up behaviour or
even stand-still of the anemometer. Should such a defect oc-
cur, return the instrument for repair.
Calibration
Frequency output is determined by a linear function of the
wind speed:
wind speed [m/s] = slope [m] × f [Hz] + offset [m/s]
For measurement campaigns with extremely crucial requi-
rements an individual calibration of each anemometer in
a wind tunnel test may be worthwhile to achieve optimum
accuracy and precision.
page 2/3
Anemometer Thies Compact
Characteristic Description / Value
Measurement principle Opto-electronic (slotted disc)
Accuracy
Accuracy ± 3 % of meas. value, however ≥ 0.5 m/s
Resolution < 0.1 m/s
Starting velocity 0.5 m/s
Operating range
Measurement range 0 ... 50 m/s
Survival wind speed max. 80 m/s (30 min)
Ambient temperature -40 ... +70 °C
Electrical data
Electrical supply 9 ... 30V DC
Electrical supply for heating 24V AC/DC @ 20W
General
Connection 7-pole plug-connection
Mounting For ex. onto mast tube with receptable thread Pg21 or boring Ø 29mm
Dimensions 155 x Ø 134 mm (see also dimensional drawing)
Weight approx. 0.7 kg
Material Housing: Aluminium
Cup star: Synthetic with bre glass
Type of ball bearings Metallic ball bearings
Protection IP 55
Manufacturer Thies
Sensor connection to Ammonit Meteo-40 data logger
Sensor Plug Pin No. Ammonit Cable Wire Colour Meteo-40 Counter Supply Sensor
Wind speed Pulse output 3 white CNT
Supply 1 red 9 ... 36 V*
Ground 2 black Main Ground
Heating
4 orange, orange
24 V
AC/DC
5 violet, violet
* Supply voltage for usage with Meteo-40 data loggers.
Connect the shield logger-sided to Ground (GND)
Cable type without heating:
LiYCY 3 x 0.25mm²
Cable type with heating wires: LiYCY 7 x 0.25mm²
page 3/3
Seal Coupling ring Female insert
Cable clamp
Sleeve
Cable-pull-relief
Seal Thrust collar
Pressing screw
Cable sheath
Cable clamp
Wire
Anemometer Thies Compact
Plug and cable assembly
Coupling socket, Type: Binder, Serial 423, EMC with cable clamp
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 outer cable sheath 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).
Sensor connection diagram to Ammonit Meteo-40 data logger
