User manual VAISALA WMS301

[. . . ] USER'S GUIDE Combined Wind Sensor WMS301 and WMS302 M210375en-A PUBLISHED BY Vaisala Oyj P. O. Box 26 FIN-00421 Helsinki Finland Phone (int. ):+358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at http://www. vaisala. com/ © Vaisala 2002 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of Sale. ___________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Contents of This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Version Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Feedback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 General Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Product Related Safety Precautions . . . . . . . . . . . . . . . . . . . . . 5 ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Regulatory Compliances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 CHAPTER 2 PRODUCT OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Introduction to WMS Series Wind Sensors . . . . . . . . . . 7 Product Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 CHAPTER 3 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Selecting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Initial Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Mounting Sensor to the Wind Sensor Mast . . . . 16 Mounting to a Pole Mast with WMS30KIT . . . . . . 17 Aligning the Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 CHAPTER 4 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Testing Proper Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Replacing Consumables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Parts List for Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 VAISALA___________________________________________________________1 User's Guide ________________________________________________________ CHAPTER 5 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The polyamide plastic reinforced with carbon fiber guarantees a rigid structure even at the highest wind speeds. The anemometer ball bearing assembly is composed of a wheel shaft, a pair of low friction ball bearings, and a shaft fixed magnet. A reed relay with electronics located in the body of the sensor converts the cup wheel rotation to pulses. Therefore, when properly supplied the sensor can be read practically with any data logger, either by counting the number of pulses within a fixed time period or measuring the time between successive transients. In the latter method VAISALA___________________________________________________________7 User's Guide ________________________________________________________ averaging of transient intervals should be used, since two pulses with non-symmetric positioning are generated during one revolution. The balanced wind vane is integrated in the housing, underneath the cup wheel. The circular tail is located far enough from the body and the cup wheel to avoid turbulence due to these structures. The vane assembly is made of PA reinforced with glass fiber providing durable and lightweight structure with fast response and low inertia. The angular position of the vane is detected using an axial symmetric rotating potentiometer. The potentiometer features low starting and running torque, linear arc-toresistance transfer ratio, and long operation life. 0212-220 Figure 1 WMS Series Combined Wind Sensor The following numbers refer to Figure 1 above: 1 2 3 = The cup wheel assembly = The vane assembly = The sensor compartment WMS301 is equipped with a one-wiper type potentiometer with an open gap of only 5 degrees. With constant voltage applied to the potentiometer, the output voltage is directly proportional to the azimuth angle. 8 ______________________________________________________ M210375en-A Chapter 2 ____________________________________________ Product Overview WMS302 has a two-wiper type potentiometer to overcome the wind direction discontinuity. 1 2 3 4 5 = = = = = +Vref, voltage input DIR, signal output, wind direction GND, ground GND, ground SPD, signal output, wind speed 0212-223 Figure 5 WMS302 Connector The following numbers refer to Figure 5 above. 1 2 3 4 5 = = = = = +Vref, voltage input DIR1, signal output, wind direction GND, ground DIR2, signal output, wind direction SPD, signal output, wind speed VAISALA__________________________________________________________13 User's Guide ________________________________________________________ A pull up resistor, for example, 10 k, is needed at SPD output to supply the anemometer electronics. It is recommended to use a Schmitt-trigger input with the SPD signal. Installation Procedure Initial Check After you have unpacked the sensor, check for any signs of shipping damage. Also test that the vane and cup wheel rotate without friction. Before installation, use an ohmmeter to check the proper operation of speed (SPD) and direction (DIR1 and DIR2) outputs while rotating the cup wheel and vane slowly. For measuring the direction, note that 10 k/360º and 10 k/180° potentiometers are used with WMS301 and WMS302 respectively. For the principal circuit diagrams, refer to Figure 6 below and Figure 7 on page 15. 0212-224 Figure 6 WMS301 Principal Circuit Diagram 14 _____________________________________________________ M210375en-A Chapter 3 __________________________________________________ Installation 0212-225 Figure 7 WMS302 Principal Circuit Diagram The WMS302 sensor is aligned at the factory according to Figure 8 below. This factory alignment applies to all models with the alignment sleeve. The alignment sleeve is secured with a small size Allen bolt to the sensor body. 0212-226 Figure 8 WMS302 Factory Alignment (Models with the Alignment Sleeve) VAISALA__________________________________________________________15 User's Guide ________________________________________________________ Mounting Mounting Sensor to the Wind Sensor Mast After a proper location for wind measurement has been selected, you can mount the sensor to the wind sensor mast. The diameter of the wind sensor mast is 30 mm. To mount the sensor, do the following: 1. [. . . ] Remove the Seeger-ring (9) (with narrow point pliers). Replace the bearings inside the housing with new ones. Assemble the sensor in the reverse work order. Note that part number 6 in Figure 12 on page 23 consists of two parts. The lower portion has a notch that is aligned at the factory in relation to the output of the potentiometer to point north when the sensor is mounted. [. . . ]