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Taylor Scientific Engineering
Vindhraða -og vindstefnumælir fyrir mjög erfiðar aðstæður.
Model WS-3 er upphitaður vindhraðamælir & WD-3 er upphitaður vindstefnumælir.
Nemarnir eru einstaklega harðgerðir og eru hannaðir fyrir allar hörðustu veðuraðstæður. Nemarnir eru með innbyrðis hitastýringu sem hentar vel fyrir erfiðar vind -og ísingaraðstæður.
Samskonar búnaður var settur upp á Bolafjalli og Gunnólfsvíkurfjalli þar sem hafa þolað mjög erfið vind -og verðurskilyrði í rúm 20 ár.
These are electrically heated, temperature controlled wind sensors designed for the mountain environment.
- Winds to 200+ mph have been handled successfully.
- Users report reliable operation in storms that have regularly incapacitated or destroyed other wind systems.
- These instruments were introduced in 1982, and over 400 systems are now in use around the world in the worst possible weather.
- The anemometer is exceptionally rugged, and has been designed for ease of mounting on the tower, ease of disassembly and maintenance, standardization of parts, and accommodation of options for the heater and the output signal.
The wind sensor is a disk rotor, 3″ high and 12″ overall diameter, with six radial cups, heliarc-welded 1/8″ aluminum construction, carefully balanced, and black anodized. This design gives an even distribution of heat, and is virtually indestructible. Response is linear, and the threshold is 3 mph. (Useable below once started.) The time constant is 7-8 sec for a step increase. (See the Calibration Notes for additional information.) Because of the rugged construction, I feel confident that winds of 250+ mph can be handled.
The deriming heat source is internal, rather than external. The heater is an electrical “Cal-Rod”-type, circular in form, rated at either 120 or 240 VAC, 1500 watts maximum, and is supported on a base plate fastened to the body of the anemometer. A protective overheat thermostat is in series with the heater. A temperature sensor is located in the air space just beneath the spinning rotor, and is wired through the heater cable to an automatic proportional temperature controller mounted in a weather-tight control box (Hoffman NEMA 4, 12″ X 12″ X 6″), which is hung at a convenient height near the base of the tower. The box also contains a manual temperature adjustment, a load lamp to monitor input and output power, an on/off circuit breaker switch, and a junction terminal strip for the tower sensors. Normal power consumption is about 100 watts, and increases automatically in a storm as the controller responds. Cables are shielded neoprene. A special low temperature (-50C) teflon/polyurethane cable is available.
The speed output can be either an analog dc voltage, or a pulse rate proportional to speed. The analog dc option utilizes a commercial dc tachometer generator, and a simple calibration scheme is used to accommodate long land lines if necessary. Output is 0 to +5 vdc (and 0 to 1 ma) over the desired full scale wind speed; for example, 100 mph, 125 kts, 200 km/hr, 100 m/sec, etc. The pulse output option produces a square wave, one cycle per revolution, of approximately 50% duty cycle, utilizing a hall-effect transistor.
The direction vane uses an identical heater assembly and proportional controller along with many other parts identical to those used in the speed sensor. The direction output is a 0 to 360° potentiometer, 5 K ohms resistance. Other resistances are available.
Adapters are provided for the tower mounting, so the sensors can be easily installed and removed with one hand. The adapters fit on 1-1/4 IPS ss pipe stubs, 6″ long, also provided. Cross-arm assemblies for the Rohn 25G and 45G towers, or to special customer specifications, are also available.
The anemometer is also available with no heater installed, in which case a dummy heater plate replaces the original. The operation of the anemometer is not affected. This gives a very rugged unheated wind system that has a much better chance of surviving an icing, or severe storm than would conventional anemometers. The heater–related parts can be easily added later.