Specifications for Wind Measuring System

1.  Anemometer
2. Wind logger
3. Weatherproof enclosure

1.    Anemometer

Wind speed sensor	:-	3 cup Anemometer
Sensing	:-	3 cup assembly mounted on friction free shaft and coupled to a chopper
Starting threshold	:-	0.5 m/s
Range	:-	0 to 65 m/s (preferably 0 to 75 m/s) Fast response
Output	:-	TTL pulse output proportional to wind speed. Suitable circuits incorporated to long line with cable loop resistance less than 50 ohms
Accuracy	:-	Better than 0.5m/s

2.    Wind logger / Data logger

Ø  Sampling time                  :  3 seconds

Ø  Battery operated system. It can work Mains a. A suitable battery Charger provided

Ø  LCD display, Real time clock calendar, Serial output port (RS 232C) for connecting to Computer and parallel interface to printer or Memory Module

Ø  Built in interface for sensors provided with the system

Ø  Sores the following information in a battery backed RAM for later retrieval through a memory reader

Ø  Average wind speed (Averaging interval can be set)

Ø  Maximum wind speed during the set interval

Ø  Displays the current wind speed

Ø  Memory enough to store a month’s data

3.    Batteries

Ø  2 nos. maintenance free batteries with suitable battery charger

Ø  Solar panels for continuous charging of batteries

4.    Weather proof enclosure with arrangement of fixing