Universal anemometer 82a
with mechanical and pneumatic transmission for continuous recording of wind direction, wind path and instantaneous values of wind speed (gusts), consisting of:
Wind sensor 82aG
with wind vane, pitot tube and cup star, in grey painted weatherproof design, with flange ø 190 mm for mounting on a steel tube mast and
Writing instrument 82aT
in a grey lacquered metal cabinet with a glass door and an attached container and diving float for gust recording, writing system with four nibs, ink registration on a writing drum, and a
Mast 82aM
6m mast with pressure pipes, couplings, rubber hoses
Measuring principle
The container with the submersible float for gust recording is located beneath the recorder housing. Water serves as the fill fluid, or in rooms prone to frost, a frost-proof mixture of equal weight. The pressure lines are connected using the included rubber hoses so that the total pressure coming from the wind vane tip is below the float, and the static pressure is above the float. This arrangement ensures that the float is adjusted solely by the dynamic pressure. The parabolic shape of the float causes a root extraction, so that the deflections of the root of the dynamic pressure, i.e., the wind speed, are proportional. The submersible float is – in contrast to diaphragm measuring instruments – free from aging and after-effects, and the overall construction is robust and without sensitive components.
Transmission elements. The large cross-section of the pressure lines ensures that even short-term gust peaks are well recorded. The central pen records the wind path in alternating rising and falling curves, moving through the diagram section in a different direction for every 10 km of wind path.
This section is divided into 10 intervals. One interval corresponds to 1 km of wind path.
By counting these wind path intervals recorded within one hour, one obtains the average wind speed in km/h.
The two upper nibs, each of which is assigned to one half of the compass rose,
record the wind direction in a continuous curve.
No. 82a Universal anemometer
with mechanical and pneumatic transmission for continuous recording of wind direction, wind path and instantaneous values of wind speed (gusts), consisting of:
No. 82aG
with wind vane, pitot tube and cup star, in grey painted weatherproof design, with flange ø 190 mm for attachment to a steel tube mast.
No. 82aT
writing instrument
in a grey lacquered metal cabinet with a glazed door and an attached container and diving float for gust recording, writing system with four nibs, ink registration on a recording drum.
Writing height:
Wind speed 96 mm
Wind path 25 mm
Wind direction 62 mm
Writing drum:
ø187 mm, 228 mm high
Drum rotation: 1 day
Paper feed: 22.5 mm/h
Duration: 8 days
Cabinet dimensions: 420 x 460 x 250 mm
Total height: 1010 mm
Weight: approx. 21.5 kg
Scope of delivery:
transmission linkage
pressure pipes
Fasteners
1 set of writing sheets
1 bottle of registration ink
4 replacement capillary springs
1 replacement ink cup
1 Operating and assembly instructions
1 evaluation scale for reading the average wind speed in m/s
