Vaisala WAV151 Betriebsanweisung PDF herunterladen (Seite 9)

Chapter 2 ____________________________________________ Product Overview

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CHAPTER 2

PRODUCT OVERVIEW

This chapter introduces the WAV151 Wind Vane features

and advantages.

Introduction to WAV151 Wind Vane

The WAV151 Wind Vane is a counter-balanced, low-

threshold optoelectronic wind vane. Infrared LEDs and

phototransistors are mounted on six orbits on each side of a

6-bit GRAY-coded disc. Rotated by the vane, the disc

creates changes in the code received by the phototransistors.

The code is changed in steps of 5.6°, one bit at a time to

eliminate any ambiguities in the coding.

A heating element in the shaft tunnel keeps the temperature

of the bearings above the freezing level in cold climates.

Nominally, it provides 10 W of heating power. It is

recommended to use a thermostat switch in the sensor cross

arm for switching the heating power on below +4 °C.

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Vaisala WAV151 Betriebsanweisung Seite 9