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User's Guide ________________________________________________________

6 ______________________________________________________ M210375en-A

- 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.

- Always hold the boards by the edges and avoid touching

the component contacts.

Regulatory Compliances

The WMS301 and WMS302 sensors comply with the
following performance and environmental test standards:

- Mechanical vibration test per 1EC-68-2-6 Fc
- RF field emission test per EN 55022 Class B
- Conducted immunity tests

- Electrostatic discharge EN61000-4-2
- RF field immunity EN6100-4-3
- Fast transient burst EN61000-4-4

Warranty

For certain products Vaisala normally gives a limited one-
year warranty. Please observe that any such warranty may
not be valid in case of damage due to normal wear and tear,
exceptional operating conditions, negligent handling or
installation, or unauthorized modifications. Please see the
applicable supply contract or Conditions of Sale for details
of the warranty for each product.

Summary of Contents for WMS302

Page 1: ...Combined Wind Sensor WMS301 and WMS302 USER S GUIDE M210375en A December 2002...

Page 2: ...echanical 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...

Page 3: ...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 Select...

Page 4: ...or 13 Figure 5 WMS302 Connector 13 Figure 6 WMS301 Principal Circuit Diagram 14 Figure 7 WMS302 Principal Circuit Diagram 15 Figure 8 WMS302 Factory Alignment Models with the Alignment Sleeve 15 Figur...

Page 5: ...nd Sensor Contents of This Manual This manual consists of the following chapters Chapter 1 General Information provides general notes for the product Chapter 2 Product Overview introduces the WMS301 a...

Page 6: ...User s Guide Replaces the above mentioned Quick Reference Guide Feedback Vaisala Customer Documentation Team welcomes your comments and suggestions on the quality and usefulness of this publication If...

Page 7: ...roved 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 un...

Page 8: ...oid touching the component contacts Regulatory Compliances The WMS301 and WMS302 sensors comply with the following performance and environmental test standards Mechanical vibration test per 1EC 68 2 6...

Page 9: ...imensions and material have been carefully designed to achieve maximum measurement quality The conical cups have been tested to give linear response between wind speed and angular velocity of the cup...

Page 10: ...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...

Page 11: ...vercome the wind direction discontinuity However a more complex voltage to direction conversion process is needed Product Nomenclature Table 2 WMS Series Wind Sensor Nomenclature Code Common Name WMS3...

Page 12: ...User s Guide ________________________________________________________ 10 _____________________________________________________ M210375en A This page intentionally left blank...

Page 13: ...11 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...

Page 14: ...age 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 5 times the he...

Page 15: ...The following numbers refer to Figure 4 above 1 Vref voltage input 2 DIR signal output wind direction 3 GND ground 4 GND ground 5 SPD signal output wind speed 0212 223 Figure 5 WMS302 Connector The fo...

Page 16: ...r 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...

Page 17: ...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 alignm...

Page 18: ...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 connec...

Page 19: ...e mast is high use a combined wind sensor with a 10 m cable You can mount the wind sensor mast to a metallic or wooden mast WARNING Do not install the wind sensor above the top of the lightning protec...

Page 20: ...______________________________________________ M210375en A 6 5 3 3 4 1 2 2 0103 010 Figure 10 WMS301 WMS302 Installation with WMS30KIT The following numbers refer to Figure 10 above 1 WMS301 or WMS302...

Page 21: ...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 Connect the signal cable to a data logger or display device Aligning the Sen...

Page 22: ...75en A 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...

Page 23: ...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...

Page 24: ...rings 1 Proceed as described in steps 1 and 2 above 2 Open the lock screw 11 of the tail assembly 10 and remove the screw 3 Remove the Seeger ring 9 with narrow point pliers 4 Remove the bearing assem...

Page 25: ...____________________________________ Maintenance VAISALA__________________________________________________________23 10 Tail assembly 11 Lock screw 12 Bearing assembly 13 Cup wheel 14 Hubnut 0009 022...

Page 26: ...______ 24 _____________________________________________________ M210375en A Parts List for Consumables Table 3 Available Spare Parts Spare Part Order Code Cup wheel assembly WA45233 Anemometer bearing...

Page 27: ...t information Common Problems Table 4 Some Common Problems and their Remedies Problem Probable Cause Remedy The data is not received from the sensor The sensor is mechanically damaged Check the cables...

Page 28: ...ent When did it fail date immediately after a while periodically randomly How many failed only one defect other same or similar defects several failures in one unit What was connected to the product a...

Page 29: ...hnical data of WMS301 and WMS302 Combined Wind Sensor Specifications Table 5 Anemometer Specifications Property Description Value Sensor Transducer type Dual Reed switch Measuring range 0 5 60 m s Sta...

Page 30: ...m s Damping ratio 0 3 Overshoot ratio 0 4 Delay distance 0 6 m Accuracy Better than 3 Table 7 Common Specifications Property Description Value Supply voltage 3 15 VDC Electrical connections 5 pin male...

Page 31: ...__________________________29 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...

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