Anemometer WAA151 USER'S GUIDE M210293en-A April 2002
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.
___________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION .......................................................3 About This Manual..................................................3 Contents of This Manual.......................................3 Version Information...............................................4 Related Manuals...................................................4 Safety .............................................................
User's Guide ________________________________________________________ CHAPTER 5 TROUBLESHOOTING............................................................ 21 Common Problems .............................................. 21 Getting Help .......................................................... 22 Return Instructions .............................................. 23 CHAPTER 6 TECHNICAL DATA................................................................. 25 Specifications ................................
Chapter 1 ___________________________________________ General Information CHAPTER 1 GENERAL INFORMATION About This Manual This manual provides information for installing, operating, and maintaining the WAA151 Anemometer. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides important safety and revision history information for the product. - Chapter 2, Product Overview, introduces the WAA151 Anemometer features.
User's Guide ________________________________________________________ Version Information Table 1 Manual Revisions Manual Code M210293en-A Description This manual, the first version of the WAA151 Anemometer User's Guide. Related Manuals Table 2 Related Manuals Manual Code M210294en Manual Name WAV151 Wind Vane - User's Guide Safety General Safety Considerations Throughout the manual, important safety considerations are highlighted as follows: WARNING Warning alerts you to a serious hazard.
Chapter 1 ___________________________________________ General Information Product Related Safety Precautions The WAA151 Anemometer delivered to you has been tested for safety and approved as shipped from the factory. Note the following precautions: WARNING Ground the product, and verify outdoor installation grounding periodically to minimize shock hazard. CAUTION Do not modify the unit. Improper modification can damage the product or lead to malfunction.
User's Guide ________________________________________________________ - Always hold the boards by the edges and avoid touching the component contacts.
Chapter 2 ____________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter introduces the WAA151 Anemometer features. Introduction to WAA151 Anemometer The WAA151 is an optoelectronic, fast-response, lowthreshold anemometer. In the cup wheel it has three lightweight conical cups providing excellent linearity over the entire operating range, up to 75 m/s.
User's Guide ________________________________________________________ 0204-039 Figure 1 WAA151 Anemometer The following numbers refer to Figure 1 above: 1 2 3 = Cup wheel assembly = Sensor shaft = Lower body 8 ______________________________________________________ M210293en-A
Chapter 3 __________________________________________________ Installation CHAPTER 3 INSTALLATION This chapter provides you with information that is intended to help you install this product. Selecting Location Allow sufficient clearance for the wind sensors. Wind sensors should not be located next to a building or any other object that might affect the flow of air.
User's Guide ________________________________________________________ In general, any object of height (h) will not remarkably disturb wind measurement at a minimum distance of 10 × h. There should be at least 150 m open area in all directions from the mast. Minimum distance between the mast and obstacles is ten times the height of an obstacle. Refer to Figure 2 on page 9.
Chapter 3 __________________________________________________ Installation Always mount the WAA151 Anemometer to the southern end of the cross arm. 1. It is recommended that you remove the cup assembly to ease installation. 2. Fit the 6-pin cable plug through the mounting flange at the end of the cross arm, then connect it to the sensor. See Figure 4 below. 3. The sensor fits to the cross arm in one position only. Face the product label south and mount the sensor to the flange by twisting.
User's Guide ________________________________________________________ Alignment The anemometer does not need any alignment after mounting. Verification If your sensor is connected to the data collection system and powered up, check that the speed readings are changing when you rotate the cup wheel manually. Connector The connector for the WAA151 is shown in Figure 5 below. 0002-027 Figure 5 WAA151 Connector The following letters refer to Figure 5 above.
Chapter 3 __________________________________________________ Installation The heating element in the shaft tunnel is connected between pins D and E. You can supply the heating element with 20 VDC or VAC. The recommended cable connector for the sensor is SOURIAU MS3116F10-6P.
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Chapter 4 ________________________________________________ Maintenance CHAPTER 4 MAINTENANCE This chapter provides information that is needed in the basic maintenance of the WAA151 Anemometer. Periodic Maintenance Cleaning Heavy contamination in the cups, such as bird dropplets or ice will deteriorate the accuracy of the anemometer. Clean the cups when necessary. Testing Proper Operation The sensor will hold its accuracy in all conditions for 1 year.
User's Guide ________________________________________________________ Replacing Consumables Replacement of the bearings should only be done by a trained technician. To replace the ball bearings, follow the procedure below and refer to Figure 6 on page 19. 1. CAUTION The cup wheel fixing screw has been treated with sealant. Do not remove the fixing screw to ensure perfect sealing after reassembling. 2. CAUTION CAUTION Open the cup wheel fixing screw with a 2-mm Allen key.
Chapter 4 ________________________________________________ Maintenance 10. Remove the internal retaining ring at the bottom of the shaft (using narrow-pointed pliers). 11. Remove the lower bearing. 12. Push out the shaft downwards through the upper body. 13. Remove the top bearing after pulling out the shaft. To reassemble the sensor, reverse the above work order . The numbers in parenthesis refer to Figure 6 on page 19. 1. NOTE Be careful when handling the new ball bearings.
User's Guide ________________________________________________________ NOTE CAUTION When placing the lower body assembly, make sure that the O-ring is correctly positioned between the upper and lower bodies. It is recommended to replace the O-rings with a new ones before reassembling. 5. Tighten the hexagon nut of the connector (2). 6. Connect the cable plug to the sensor body connector. Fasten the sensor body on the crossarm with three screws. 7. Mount the cup assembly onto the sensor body.
Chapter 4 ________________________________________________ Maintenance 0204-043 Figure 6 WAA151 Assembly VAISALA__________________________________________________________19
User's Guide ________________________________________________________ Parts List for Consumables Table 3 Available Spare Parts Spare Part Cup assembly Set of bearings and gasket Sensor board (PCB) Order Code 7150WA 16644WA 1433WA 20 _____________________________________________________ M210293en-A
Chapter 5 ______________________________________________ Troubleshooting CHAPTER 5 TROUBLESHOOTING This chapter describes common problems, their probable causes and remedies, and contact information. Common Problems Table 4 Problem The data is not received from the sensor. Some Common Problems and their Remedies Probable Cause The sensor is mechanically damaged. After removing the connector's hexagon nut, the connector is bent, which breaks the connection wires. The sensor is not powered properly.
User's Guide ________________________________________________________ Problem Probable Cause The sensor shaft is The heating element does not covered with ice function. and snow. The heating element is not properly connected. The output from connector pin C tracked with an oscilloscope is not square wave. The frequency is not equal to 14 times revolution rate. Current consumption is more than 28 mA when the shaft is rotated mechanically. The printed circuit board is damaged.
Chapter 5 ______________________________________________ Troubleshooting Return Instructions If the product needs repair, please follow the instructions below to speed up the process and avoid extra costs. 1. Read the warranty information. 2. Write a Problem Report with the name and contact information of a technically competent person who can provide further information on the problem. 3.
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Chapter 6 _______________________________________________Technical Data CHAPTER 6 TECHNICAL DATA This chapter provides the technical data of the WAA151 Anemometer. Specifications Table 5 WAA151 Anemometer Specifications Property Sensor/Transducer type Measuring range Starting threshold Distance constant Transducer output 0 ... 75 m/s Characteristic Transfer Function Accuracy (within 0.4 ... 60 m/s) With Characteristic Transfer Function With "simple transfer function" Uf = 0.
User's Guide ________________________________________________________ Property Recommended connector at cable end Operating temperature Storage temperature Housing material Cup material Dimensions Weight Description/Value SOURIAU MS3116F10-6P -50 ... +55 °C (with shaft heating) -60 ... +70 °C AlMgSi, gray anodized PA, reinforced with carbon fiber 240 (h) × 90 (Ø) mm Swept radius of cup wheel: 91 mm 570 g 1) Measured with cup wheel in position least favored by flow direction. Optimum position yields < 0.
