Vaisala WAV151 User manual

USER'S GUIDE
Wind Vane
WAV151
M210294en-A

PUBLISHED BY
Vaisala Oyj Phone (int.):[phone]
P.O. Box 26 Fax: [phone]
FIN-00421 Helsinki
Finland
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.

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VAISALA___________________________________________________________1
Table of Contents
CHAPTER 1
GENERAL INFORMATION.......................................................3
About This Manual..................................................3
Contents of This Manual.......................................3
Version Information...............................................4
Related Manuals...................................................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 WAV151 Wind Vane......................7
CHAPTER 3
INSTALLATION ........................................................................9
Selecting Location..................................................9
Installation Procedure..........................................10
Mounting.............................................................10
Alignment............................................................12
Verification..........................................................12
Connector..............................................................12
CHAPTER 4
MAINTENANCE ......................................................................15
Periodic Maintenance...........................................15
Cleaning .............................................................15
Testing Proper Operation ...................................15
Replacing Consumables.....................................16
Parts List for Consumables .................................20

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CHAPTER 5
TROUBLESHOOTING............................................................21
Common Problems ..............................................21
Getting Help.......................................................... 22
Return Instructions ..............................................23
CHAPTER 6
TECHNICAL DATA.................................................................25
Specifications....................................................... 25
MTBF .....................................................................26
MTTR .....................................................................27
List of Figures
Figure 1 WAV151 Wind Vane.................................................8
Figure 2 Recommended Mast Location in Open Area............9
Figure 3 Recommended Mast Length on the Top of
Building ..................................................................10
Figure 4 Mounting of Wind Sensor.......................................11
Figure 5 WAV151 Connector................................................12
Figure 6 WAV151 Assembly.................................................19
List of Tables
Table 1 Manual Revisions.....................................................4
Table 2 Related Manuals ......................................................4
Table 3 Available Spare Parts.............................................20
Table 4 Some Common Problems and their Remedies......21
Table 5 WAV151 Wind Vane Specifications........................25
Table 6 Output from Connector Pins C to H........................26
Table 7 MTBF Values..........................................................26

Chapter 1 ___________________________________________General Information
VAISALA___________________________________________________________3
CHAPTER 1
GENERAL INFORMATION
About This Manual
This manual provides information for installing, operating,
and maintaining the WAV151 Wind Vane.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides important
safety, revision history, and warranty information for the
product.
- Chapter 2, Product Overview, introduces the WAV151
Wind Vane features and advantages.
- Chapter 3, Installation, provides you with information
that is intended to help you install this product.
- Chapter 4, Maintenance, provides information that is
needed in the basic maintenance of the WAV151 Wind
Vane.
- Chapter 5, Troubleshooting, describes common problems,
their probable causes and remedies, and contact
information.
- Chapter 6, Technical Data, provides the technical data of
the WAV151 Wind Vane.

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Version Information
Table 1 Manual Revisions
Manual Code Description
M210294en-A This manual, the first version of the
WAV151 Wind Vane User's Guide.
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M210293en WAA151 Anemometer - 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. If you do not read
and follow instructions very carefully at this point, there is
a risk of injury or even death.
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.

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Product Related Safety
Precautions
The WAV151 Wind Vane 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.
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent
damage to electronic circuits. Vaisala products are
adequately protected against ESD for their intended use.
However, it is possible to damage the product by delivering
electrostatic discharges when touching, removing, or
inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages
yourself:
- 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.

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- Always hold the boards by the edges and avoid touching
the component contacts.
Regulatory Compliances
The WAV151 complies with the following performance and
environmental test standards:
- Wind tunnel tests per ASTM standard method D5366-96
(for starting threshold, damping ratio, overshoot ratio, and
delay distance; refer to technical data)
- Exploratory vibration test per MIL-STD-167-1
- Humidity test per MIL-STD-810E, Method 507.3
- Salt fog test per MIL-STD-810E, Method 509.3
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.

Chapter 2 ____________________________________________ Product Overview
VAISALA___________________________________________________________7
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the WAV151 Wind Vane features
and advantages.
Introduction to WAV151 Wind Vane
The WAV151 Wind Vane is a counter-balanced, low-
threshold optoelectronic wind vane. Infrared LEDs and
phototransistors are mounted on six orbits on each side of a
6-bit GRAY-coded disc. Rotated by the vane, the disc
creates changes in the code received by the phototransistors.
The code is changed in steps of 5.6°, one bit at a time to
eliminate any ambiguities in the coding.
A heating element in the shaft tunnel keeps the temperature
of the bearings above the freezing level in cold climates.
Nominally, it provides 10 W of heating power. It is
recommended to use a thermostat switch in the sensor cross
arm for switching the heating power on below +4 °C.

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0204-044
Figure 1 WAV151 Wind Vane
The following numbers refer to Figure 1 above:
1=Vaneassembly
2=Sensorshaft
3 = Lower body

Chapter 3 __________________________________________________ Installation
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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.
0204-040
Figure 2 Recommended Mast Location in Open Area

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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.
0204-041
Figure 3 Recommended Mast Length on the Top of
Building
The recommended minimum length (marked with the letter
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.
Installation Procedure
Mounting
Sensor installation is most convenient when you use a
Vaisala manufactured cross arm for mounting the sensor.

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VAISALA__________________________________________________________11
Always mount the WAV151 Wind Vane to the northern end
of the cross arm.
1. It is recommended that you remove the vane assembly
to ease installation.
2. Fit the 10-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 north and mount the sensor to
the flange by twisting. Note that the plastic washers (1)
should be inserted between the flange and the sensor.
See Figure 4 below.
4. Finally, tighten the screws (2) with an Allen key (3).
See Figure 4 below.
5. Mount the vane assembly and tighten its fixing screw.
0204-042
Figure 4 Mounting of Wind Sensor

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Alignment
The wind vane does not need any alignment after mounting
when a Vaisala cross arm is used. The mounting screws are
located at the bottom of the sensor so that you can mount
the sensor in one position only to the flange.
Verification
If your sensor is connected to the data collection system and
powered up, check that the directional readings are correct
by holding the vane in a few fixed angles and verifying data.
Connector
The connector for the WAV151 Wind Vane is shown in
Figure 5 below. The heating element in the shaft tunnel is
connected between pins J and K. You can supply the heating
element with 20 VDC or VAC.
The recommended cable connector for the sensor is
SOURIAU MS3116F12-10P.
0002-031
Figure 5 WAV151 Connector

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The following letters refer to Figure 5 on page 12.
A = D+, power input from 9.5 to 15.5 VDC
B = GND, common ground
C = G5, signal output
D = G4, signal output
E = G3, signal output
F = G2, signal output
G = G1, signal output
H = G0, signal output
J = HTNG, 20 VDC or VAC
K = HTNG, 20 VDC or VAC

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Chapter 4 ________________________________________________ Maintenance
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CHAPTER 4
MAINTENANCE
This chapter provides information that is needed in the basic
maintenance of the WAV151 Wind Vane.
Periodic Maintenance
Cleaning
Heavy contamination in the vane, such as bird dropplets or
ice will deteriorate the accuracy of the wind vane. Clean the
vane when necessary.
Testing Proper Operation
The sensor will hold its accuracy in all conditions for 1 year.
If the rains are mostly casual and moderate, and the
atmospheric corrosion is typical, the sensor accuracy will
remain for 2 years.
However, the ball bearings must be checked once a year and
the sensor shaft rotated manually. To do this, remove the
vane assembly. To ensure proper operation, the shaft should
spin smoothly and it should not create any detectable noises.

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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. Open the vane assembly fixing screw with a 2-mm
Allen key. The correct screw is the lower one shown in
Figure 6 on page 19. Remove the assembly.
CAUTION The vane assembly fixing screw has been treated with
sealant. Do not remove the fixing screw to ensure perfect
sealing.
2. Loosen the hex nut of the connector with a 27-mm
tool.
CAUTION Be careful not to bend the connector pins.
3. Loosen the three pan head screws at the bottom of the
sensor body with a 7-mm tool.
4. Remove the lower body assembly by pulling it straight
outwards.
5. Loosen the spacer screws with a 7-mm tool and
disconnect the heating element outlet.
6. Remove the printed circuit board.
CAUTION Do not twist or bend the connector. This may break the
pins.
7. Loosen the fixing screw of the code disc with a 2-mm
Allen key and remove the disc.
8. Remove the external retaining ring (using narrow-
pointed pliers).
9. Remove the spacer ring.

Chapter 4 ________________________________________________ Maintenance
VAISALA__________________________________________________________17
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.
To reassemble the sensor, reverse the above work order. The
numbers in parenthesis refer to Figure 6 on page 19.
1. Take the previous steps in opposite order until
assembling the code disc.
NOTE Be careful when handling the new ball bearings. Do not
drop them or force them onto the shaft.
2. Attach the code disc (7) back onto the shaft. The disc
has to be positioned so that it does not touch the opto-
coupler on the printed circuit board (6). Tighten the
fixing screw of the code disc.
CAUTION Assure that the code disc does not touch the opto-coupler.
3. Attach the heating element outlet to the printed circuit
board. Put the printed circuit board in place and fasten
it with spacers (5).
4. Put the lower body assembly (4) carefully into place.
Fasten the three screws (3) at the bottom of the sensor.
Make sure that the bigger O-ring (14) is correctly
positioned between the upper and the lower sensor
bodies. Check also that the connector O-ring (14) is in
place. The O-ring is recommended to be replaced with
a new one after each opening.

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NOTE 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 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 vane assembly onto the sensor body.
Tighten the screw.
CAUTION The heating resistance element cannot be removed without
special tools. To avoid any damages, it is recommended
that replacement of the heating element be carried out by
the manufacturer.
The following numbers refer to Figure 6 on page 19:
1=Vaneassembly
2 = Hex nut of the connector
3 = M6 x 16 DIN7991 (3 pcs)
4 Lower body
5 Spacer (3 pcs)
6 Printed circuit board (PCB)
7 Code disc
8 External retaining ring, body
9 Spacer
10 Internal retaining ring, shaft
11 Ball bearings
12 Shaft and Upper body assembly
13 Ball bearings
14 O-rings, 2 pcs