Vaisala WAA151 User manual
USER'S GUIDE
A
nemomete
r
WAA151
M210293en-A
PUBLISHED BY
Vaisala Oyj Phone (int.):+358 9 8949 1
P.O. Box 26 Fax: +358 9 8949 2227
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.
___________________________________________________________________
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 WAA151 Anemometer..................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
User's Guide ________________________________________________________
2 ______________________________________________________ M210293en-A
CHAPTER 5
TROUBLESHOOTING............................................................21
Common Problems ..............................................21
Getting Help.......................................................... 22
Return Instructions ..............................................23
CHAPTER 6
TECHNICAL DATA.................................................................25
Specifications....................................................... 25
MTBF .....................................................................26
MTTR .....................................................................26
List of Figures
Figure 1 WAA151 Anemometer..............................................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 WAA151 Connector................................................12
Figure 6 WAA151 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 WAA151 Anemometer Specifications.....................25
Table 6 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 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.
- 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 WAA151
Anemometer.
- Chapter 5, Troubleshooting, describes common problems,
their probable causes and remedies, and contact
information.
- Chapter 6, Technical Data, provides the technical data of
the WAA151 Anemometer.
User's Guide ________________________________________________________
4 ______________________________________________________ M210293en-A
Version Information
Table 1 Manual Revisions
Manual Code Description
M210293en-A This manual, the first version of the
WAA151 Anemometer User's Guide.
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M210294en 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. 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.
Chapter 1 ___________________________________________General Information
VAISALA___________________________________________________________5
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.
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.
User's Guide ________________________________________________________
6 ______________________________________________________ M210293en-A
- Always hold the boards by the edges and avoid touching
the component contacts.
Regulatory Compliances
The WAA151 complies with the following performance and
environmental test standards:
- Wind tunnel tests per ASTM standard method D5096-96
(for starting threshold, distance constant, transfer
function; refer to Chapter 6, Technical Data on page 25)
- 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 WAA151 Anemometer features.
Introduction to WAA151 Anemometer
The WAA151 is an optoelectronic, fast-response, low-
threshold anemometer. In the cup wheel it has three light-
weight conical cups providing excellent linearity over the
entire operating range, up to 75 m/s. Rotated by the wind, a
chopper disc attached to the cup wheel’s shaft cuts an
infrared light beam 14 times per revolution, generating a
pulse train output from a phototransistor.
The output pulse rate can be regarded directly proportional
to wind speed, for example, 246 Hz = 24.6 m/s. For best
available accuracy, however, the characteristic transfer
function should be used, see section Specifications on page
25, to compensate for starting inertia and slight
overspeeding.
The 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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