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.
___________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION .......................................................3 About This Manual..................................................3 Contents of This Manual.......................................3 Version Information...............................................4 Feedback..............................................................4 Safety .........................................................
User's Guide ________________________________________________________ CHAPTER 5 TROUBLESHOOTING............................................................ 25 Common Problems .............................................. 25 Technical Support ................................................ 25 Return Instructions .............................................. 26 CHAPTER 6 TECHNICAL DATA................................................................. 27 Specifications ....................................
Chapter 1 ___________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the product. About This Manual This manual provides information for installing, maintaining, and troubleshooting WMS301 and WMS302 Combined Wind Sensor. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the product.
User's Guide ________________________________________________________ - Chapter 6, Technical Data, provides the technical data of WMS301 and WMS302 Combined Wind Sensor. Version Information Table 1 Manual Revisions Manual Code M010030en-C M210375en-A Description WMS301 & WMS302 Combined Wind Sensors Quick Reference Guide First version of the WMS301 and WMS302 Combined Wind Sensor User's Guide. Replaces the above mentioned Quick Reference Guide.
Chapter 1 ___________________________________________ General Information CAUTION Caution warns you of a potential hazard. If you do not read and follow instructions carefully at this point, the product could be damaged or important data could be lost. NOTE Note highlights important information on using the product. Product Related Safety Precautions The device delivered to you has been tested for safety and approved as shipped from the factory.
User's Guide ________________________________________________________ - Handle ESD sensitive components on a properly grounded and protected ESD workbench. When this is not possible, ground yourself to the equipment chassis before touching the boards. Ground yourself with a wrist strap and a resistive connection cord. When neither of the above is possible, touch a conductive part of the equipment chassis with your other hand before touching the boards.
Chapter 2 ____________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter introduces the WMS301 and WMS302 Combined Wind Sensor features. Introduction to WMS Series Wind Sensors WMS series wind sensors are compact sized instruments with the wind speed and direction sensors integrated into one unit. The sensor electronics is located inside a watertight compartment providing full protection against water, dust, pollutants, and electromagnetic interference.
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.
Chapter 2 ____________________________________________ Product Overview WMS302 has a two-wiper type potentiometer to overcome the wind direction discontinuity. However, a more complex voltage-to-direction conversion process is needed.
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Chapter 3 __________________________________________________ Installation CHAPTER 3 INSTALLATION This chapter provides you with information that is intended to help you install the wind sensor. Selecting Location Allow sufficient clearance for the wind sensor. Install the wind sensor away from buildings or any other objects that might affect the airflow.
User's Guide ________________________________________________________ In general, any object of height (h) will not remarkably disturb the wind measurement at a minimum distance of 10 × h. There should be at least 150 m open area to all directions from the mast. Refer to Figure 2 on page 11. 0212-222 Figure 3 Recommended Mast Length on the Top of a Building The recommended minimum length (h in Figure 3 above) for the mast that is installed on the top of a building is 1.
Chapter 3 __________________________________________________ Installation 0212-223 Figure 4 WMS301 Connector The following numbers refer to Figure 4 above. 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.
User's Guide ________________________________________________________ A pull up resistor, for example, 10 kΩ, 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.
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.
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. Fit the cable (number 2 in Figure 9 below) through the mounting piece (3) and connect the cable to the sensor. 0212-227 Figure 9 Mounting of the Combined Wind Sensor 2.
Chapter 3 __________________________________________________ Installation 4. Secure the mounting piece (3) to the mast by tightening the mounting screw (6). 5. Route the sensor cable down along the mast and always attach the cable to the mast with cable ties. 6. Mount the wind sensor mast firmly to a solid base, for example, to a pole mast. 7. Connect the signal cable to a data logger or display device.
User's Guide ________________________________________________________ 1 2 6 5 3 4 2 3 0103-010 Figure 10 WMS301/WMS302 Installation with WMS30KIT The following numbers refer to Figure 10 above: 1 2 3 4 5 6 = = = = = = WMS301 or WMS302 Wood screws Cable tie Wooden mast Plastic protective plate Pole mast 18 _____________________________________________________ M210375en-A
Chapter 3 __________________________________________________ Installation To mount the wind sensor mast to a wooden mast, do the following (the numbers refer to Figure 10 on page 18): 1. Attach the mounting piece with the wood screws (2) to the wooden mast (4) through the wind sensor mast. 2. Secure the cable with the fixed cable tie (3) to the wind sensor mast. 3. Route the sensor cable down along the mast and always attach the cable to the mast with cable ties. 4.
User's Guide ________________________________________________________ 2. Choose a known wind direction reference point on the horizon with the help of a compass. 3. Point the nose (1) of the vane at the reference point. 4. Hold the vane in position and slowly rotate the mounting piece (4) until wind direction shows proper value. 5. Secure the mounting piece (4) to the mast by tightening the mounting screw.
Chapter 4 ________________________________________________ Maintenance CHAPTER 4 MAINTENANCE This chapter provides information that is needed in basic maintenance of the product. Periodic Maintenance Testing Proper Operation It is recommended to check the ball bearings of the anemometer and the vane every year. If the cup wheel or the vane is not rotating smoothly or it creates detectable noise, the bearings must be replaced. Replacing Consumables Only a trained technician should replace the bearings.
User's Guide ________________________________________________________ To replace the ball bearings, do the following (the numbers refer to Figure 12 on page 23): Anemometer bearings: 1. Loosen the hubnut (14) with fingers or a 10 mm tool and remove the cup wheel (13). 2. Remove the ball bearing assembly (12) by unscrewing it counterclockwise (with a 10 mm tool). 3. Insert a new bearing assembly (12). Tighten gently. 4. Fasten the cup wheel to the sensor. Tighten gently. Vane bearings: 1.
Chapter 4 ________________________________________________ Maintenance 10 11 12 13 14 = = = = = Tail assembly Lock screw Bearing assembly Cup wheel Hubnut 0009-022 Figure 12 WMS Assembly VAISALA__________________________________________________________23
User's Guide ________________________________________________________ Parts List for Consumables Table 3 Available Spare Parts Spare Part Cup wheel assembly Anemometer bearing assembly Vane assembly Set of bearings Order Code WA45233 WA45232 WA35234 25160WA 24 _____________________________________________________ M210375en-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. Remedy Check the cables and connectors. The sensor is not powered properly.
User's Guide ________________________________________________________ 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.
Chapter 6 _______________________________________________Technical Data CHAPTER 6 TECHNICAL DATA This chapter provides the technical data of WMS301 and WMS302 Combined Wind Sensor. Specifications Table 5 Anemometer Specifications Property Sensor / Transducer type Measuring range Starting threshold Distance constant Transducer output Accuracy (≤ 10 m/s) (> 10 m/s) Transfer function, where U = wind speed [m/s] F = output frequency [Hz] Description/Value Dual Reed switch 0.5 ... 60 m/s < 0.
User's Guide ________________________________________________________ Table 6 Vane Specifications Property Sensor / Transducer type Measuring range WMS302 WMS301 Starting threshold Damping ratio Overshoot ratio Delay distance Accuracy Table 7 0 ... 360° 0 ... 355° < 1.0 m/s 0.3 0.4 0.
Chapter 6 _______________________________________________Technical Data Dimensions 0212-228 Figure 13 Dimensions (in mm) of the Combined Wind Sensor MTBF The calculated mean time between failure is 4.4 × 105 h for permanent installations. The value equals to 2.27 when expressed in a failure frequency during 106 hours of use. MTTR Mean time to repair is 0.2 h.
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