A70 Transmitters For The D5 Wind Direction Vane

The A70 Wind Azimuth Transmitter can be used to monitor the signal from the Richards D5 High Speed Potentiometric Wind Direction Vane. The wind vane vane produces a signal proportional to the azimuth of the wind. See D5 data sheet for detailed wind direction vane specifications.

The A70 transmitter provides constant excitation for the vane. It also scales the signal from the vane to produce the desired output signal. The vane has a 4 degree dead band centered on North. Ranges of 0 to 360 degrees and 0 to 540 degrees are available. The 360 degree range is the least expensive and most suitable for electronic data collection systems. The 540 degree range should be used when driving chart recorders with ink pens. The 540 degree range minimizes the transitions of the recorder pen from zero to full scale that might otherwise paint the entire chart when the wind direction is from the North. Combination speed and direction instruments are available. Sensor operating range is -40 / 60 degrees C.

These units are used in conjunction with electronic data collection systems or for input to control systems. They are readily combined with meter relays to provide custom controls.

Systems are available with outputs of 0-1 mA, 0-1 V or 4-20 mA. All systems may be powered from either 120 VAC, 230 VAC or
12 - 24 VDC.

The instruments are available in a variety of packages including steel JIC boxes meeting NEMA 12 standards, weatherproof fiberglass enclosures meeting NEMA 4X, IP66 and IEC 529 standards and track mounted versions. NEMA 12 enclosures provide protection from dust for indoor applications. NEMA 4X enclosures may be used indoors or outdoors. They provide protection from corrosion, wind blown dust and rain and are undamaged by ice. Track mounted versions are intended for mounting inside an enclosure provided by the user. Where required, electrical connection to the sensor is via terminal block. A barrier strip is provided for connection to operating power.

Each system is provided with a detailed instruction manual.