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Chapter 6 _______________________________________________Technical Data

VAISALA__________________________________________________________27

CHAPTER 6

TECHNICAL DATA

This chapter provides the technical 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

Starting threshold

< 0.4 m/s

Distance constant

2 m

Transducer output

1 Hz ~ 0.7 m/s

Accuracy
(

≤

10 m/s)

(

10 m/s)

0.3 m/s

error < 2 %

Transfer function, where
U = wind speed [m/s]
F = output frequency [Hz]

U = - 0.24 + F

0.699

Содержание WM30

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

Страница 2: ...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...

Страница 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 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 ...

Страница 4: ...tor 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 Figure 9 Mounting of the Combined Wind Sensor 16 Figure 10 WMS301 WMS302 Installation with WMS30KIT 18 Figure 11 Aligning the Combined Wind Sensor 19 Figure 12 WMS Assembly 23 Figure 13 Dimensions in mm o...

Страница 5: ...ind 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 and WMS302 Combined Wind Sensor features Chapter 3 Installation provides you with information that is intended to help you install the wind sensor Chapter 4 Maintenance provides information that is ne...

Страница 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 you find errors or have other suggestions for improvement please indicate the chapter section and page number You can send comments to us by e mail manuals vaisala com Safety General Safety Consider...

Страница 7: ...proved 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 ESD Protection Electrostatic Discharge ESD can cause immediate or latent damage to electronic circuits Vaisala products are adeq...

Страница 8: ...void 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 product...

Страница 9: ...dimensions 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 wheel 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 f...

Страница 10: ...A 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 to resistance transfer ratio and long operation life 0212 220 Figure 1 WMS Series Combined Wind Sensor The following numbers ref...

Страница 11: ...overcome 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 WMS301 Combined Wind Sensor with one wiper potentiometer Basic WMS302 Combined Wind Sensor with two wiper potentiometers Options WMS30KIT Installation Accessories to be used with pole masts ...

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

Страница 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 wind sensor away from buildings or any other objects that might affect the airflow 0212 221 Figure 2 Recommended Mast Location in Open Area ...

Страница 14: ...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 5 times the height of the building H When the diagonal W is less than the height H the minimum length of the mast is 1 5 W Connector The WMS301 connector is shown in Figure 4 on page 13 The WMS302 connector is sho...

Страница 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 following numbers refer to Figure 5 above 1 Vref voltage input 2 DIR1 signal output wind direction 3 GND ground 4 DIR2 signal output wind direction 5 SPD signal output wind speed ...

Страница 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 speed SPD and direction DIR1 and DIR2 outputs while rotating the cup wheel and vane slowly For measuring the direction note that 10 kΩ 360º and 10 kΩ 180 potentiometers are used with WMS301 and WMS30...

Страница 17: ...2 225 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 ...

Страница 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 connect the cable to the sensor 0212 227 Figure 9 Mounting of the Combined Wind Sensor 2 Place the mounting piece 3 on the top of the mast and align the tap 5 to north 3 Align the notch 4 to the tap 5 and ...

Страница 19: ...he 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 protection rod To mount the wind sensor mast to a metallic mast do the following the numbers refer to Figure 10 on page 18 1 Install the plastic protective plate 5 between the mast 6 and the mounting piece...

Страница 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 2 Wood screws 3 Cable tie 4 Wooden mast 5 Plastic protective plate 6 Pole mast ...

Страница 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 Sensor If you need to align the combined wind sensor use the data logger or display device to monitor the instant wind direction To align the combined wind sensor do the following numbers refer to Figur...

Страница 22: ...375en 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 mounting piece 4 until wind direction shows proper value 5 Secure the mounting piece 4 to the mast by tightening the mounting screw ...

Страница 23: ...r 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 If your sensor includes the alignment sleeve and the factory alignment has not been altered you can simply rem...

Страница 24: ...arings 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 assembly 8 5 Replace the bearings inside the housing with new ones 6 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 h...

Страница 25: ..._____________________________________ Maintenance VAISALA__________________________________________________________23 10 Tail assembly 11 Lock screw 12 Bearing assembly 13 Cup wheel 14 Hubnut 0009 022 Figure 12 WMS Assembly ...

Страница 26: ..._______ 24 _____________________________________________________ M210375en A Parts List for Consumables Table 3 Available Spare Parts Spare Part Order Code Cup wheel assembly WA45233 Anemometer bearing assembly WA45232 Vane assembly WA35234 Set of bearings 25160WA ...

Страница 27: ...ct 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 and connectors The sensor is not powered properly Check that the supply voltage is 3 to 15 VDC Technical Support For technical questions contact the Vaisala technical support E mail helpdesk vaisala...

Страница 28: ...ment 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 and to which connectors Input power source type voltage and list of other items lighting heaters motors etc that were connected to the same power output What was done when the failure was noticed 4 In...

Страница 29: ...chnical 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 Starting threshold 0 4 m s Distance constant 2 m Transducer output 1 Hz 0 7 m s Accuracy 10 m s 10 m s 0 3 m s error 2 Transfer function where U wind speed m s F output frequency Hz U 0 24 F 0 699 ...

Страница 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 with 12 mm threads Body material AlMgSi gray anodized Cup material PA reinforced with carbon fiber black Vane material PA reinforced with glass fiber white Operating temperature 40 55 C 40 131 F Sto...

Страница 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 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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