NovaLynx Corporation_____________________________________________________________________________
200-WS-23
Page 4
Oct 2020
1
FORWARD
Thank you for purchasing NovaLynx products. NovaLynx has been designing and manufacturing
weather instruments since 1988. NovaLynx represents several well-known brands of quality
manufacturers, including Gill Instruments, RM Young, Kipp & Zonen, and Vaisala. It is our hope that our
products will meet all your monitoring requirements.
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INTRODUCTION
The
200-WS-23 Wind Speed and Direction
system converts each measurement into a 4-20 mA output
signal suitable for use with process control and monitoring systems. Each signal is loop powered by the
monitoring equipment, so a separate power supply is not needed. The driver circuitry is protected in a
NEMA enclosure suitable for indoor or outdoor mounting. The anemometer is a
200-WS-02F Wind
Speed and Direction
sensor that includes 40' of cable and is designed to be mounted at the top of a
mast (not included).
The
200-WS-23S Wind Speed Only
system
converts the wind speed measurement into a 4-20 mA
output signal. The signal is loop powered by the monitoring equipment, so a separate power supply is
not needed. The driver circuitry is protected in a NEMA enclosure suitable for indoor or outdoor
mounting. The anemometer is a
200-WS-01B Wind Speed
sensor that includes 40' of cable and is
designed to be mounted at the top of a mast (not included).
The anemometers are
ruggedly constructed of UV-resistant ABS plastic and anodized aluminum parts.
Each anemometer mounts to a 1.07" (27 mm) diameter mast (sold separately). The cable is 40 feet (12
m) long and can be extended up to 250 feet (76 m).
Wind speed is sensed by rotating cups connected to a hub with 3 magnets. A reed switch in the base
senses the magnets and closes briefly three times per revolution of the cups. The speed constant is
1.25 mph = 1 Hz (0.5588 m/s = 1 Hz).
Wind direction is sensed by a 20k ohm potentiometer mechanically connected to the wind vane. A
small excitation voltage across the potentiometer generates a voltage on the wiper element
proportional to wind direction. The anemometer must be installed with the North indicating label
oriented to the North Pole in order for the measurements to be meaningful.
It is important to earth ground the anemometer using the shield wire included in the cable. A screw
terminal in the transmitter box is provided for connecting the shield wire, but it is up to the installer to
connect the green earth-grounding wire to a suitable earth ground.
