Vaisala WAA151 User manual

M210293EN-C

User Guide

Vaisala Anemometer

WAA151

PUBLISHED BY

Vaisala Oyj

Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland

P.O. Box 26, FI-00421 Helsinki, Finland

+358 9 8949 1

Visit our Internet pages at www.vaisala.com.

No part of this document may be

reproduced, published or publicly

displayed in any form or by any

means, electronic or mechanical

(including photocopying), nor

may its contents be modiﬁed,

translated, adapted, sold or

disclosed to a third party without

prior written permission of the

documents and translated

portions of multilingual

documents are based on the

original English versions. In

ambiguous cases, the English

versions are applicable, not the

translations.

The contents of this document are

subject to change without prior

notice.

Local rules and regulations may

vary and they shall take

precedence over the information

contained in this document.

Vaisala makes no representations

on this document’s compliance

with the local rules and

regulations applicable at any

given time, and hereby disclaims

any and all responsibilities related

thereto.

This document does not create

any legally binding obligations for

Vaisala towards customers or end

users. All legally binding

obligations and agreements are

included exclusively in the

applicable supply contract or the

General Conditions of Sale and

General Conditions of Service of

Vaisala.

Table of Contents

1. About This Document...................................................................................... 3

1.1 Version Information.............................................................................................3

1.2 Related Manuals...................................................................................................3

1.3 Documentation Conventions..............................................................................3

1.4 Trademarks...........................................................................................................4

2. Product Overview.............................................................................................. 5

2.1 Vaisala Anemometer WAA151............................................................................ 5

2.2 Safety.................................................................................................................... 5

2.2.1 ESD Protection..............................................................................................6

2.3 Regulatory Compliances.....................................................................................6

3. Installation............................................................................................................ 7

3.1 Selecting Location............................................................................................... 7

3.2 Mounting Wind Sensors on Cross Arm........................................................... 10

3.3 Connecting the Anemometer............................................................................ 11

3.4 Verifying Installation........................................................................................... 11

4. Maintenance........................................................................................................12

4.1 Cleaning the Anemometer................................................................................ 12

4.2 Testing Anemometer Operation.......................................................................12

4.3 Replacing Consumables.................................................................................... 12

4.4 Reassembling the Anemometer.......................................................................14

5. Troubleshooting................................................................................................16

6. Technical Data....................................................................................................17

6.1 WAA151 Speciﬁcations.......................................................................................17

6.2 Spare Parts and Accessories.............................................................................19

6.3 MTBF....................................................................................................................19

6.4 MTTR...................................................................................................................20

Technical Support............................................................................................ 21

Warranty and Product Returns..................................................................... 21

Recycling............................................................................................................ 21

Table of Contents

WAA151 User Guide M210293EN-C

1. About This Document

1.1 Version Information

Table 1 Document Versions

Document Code Date Description

M210293EN-C November 2018 Updated spare part descriptions of ZZ45037

and ZZ45037SPEC.

M210293EN-B August 2018 Installation instructions updated. Connector

type and item code changed.

M210293EN-A April 2002 First version

1.2 Related Manuals

Table 2 Related Manuals

Document Code Name

M210349EN Vaisala Cross Arm WAC151 User Guide

M210294EN Vaisala Wind Vane WAV151 User Guide

M210822EN Vaisala Serial Wind Transmitter WAC155 User Guide

1.3 Documentation Conventions

Warning alerts you to a serious hazard. If you do not read and

follow instructions carefully at this point, there is a risk of injury or even death.

WARNING!

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.

CAUTION!

Note highlights important information on using the product.

Chapter 1 – About This Document

Tip gives information for using the product more eciently.

Lists tools needed to perform the task.

Indicates that you need to take some notes during the task.

1.4 Trademarks

Vaisalaâis a registered trademark of Vaisala Oyj.

All other product or company names that may be mentioned in this publication are trade

names, trademarks, or registered trademarks of their respective owners.

WAA151 User Guide M210293EN-C

2. Product Overview

2.1 Vaisala Anemometer WAA151

1Cup wheel assembly

2Sensor shaft

3Lower body

WAA151 is a fast-response, low-threshold anemometer. Three lightweight, conical cups

mounted on the cup wheel provide a linear response rate over the entire operating range, up

to 75 m/s (168 mph).

A wind-rotated chopper disc attached to the shaft of the cup generates a pulse output from a

phototransistor in the base of the sensor. The output pulse rate is directly proportional to wind

speed.

The heating element in the shaft tunnel keeps the temperature of the bearings above the

freezing level in cold climates. The nominal heating power is 10 W. Vaisala recommends that

you use a thermostat switch in the cross arm for switching the heating power on below +4 °C

(+39 °F).

2.2 Safety

The WAA151 anemometer delivered to you has been tested for safety and approved as shipped

from the factory. Note the following precautions:

Ground the product and verify outdoor installation grounding

periodically. Failure to provide proper grounding can result in injury or death

from electrical shock and can severely damage the equipment.

WARNING!

Chapter 2 – Product Overview

Improper modiﬁcation can damage the product or lead to

malfunction. Any modiﬁcation voids your warranty.

CAUTION!

2.2.1 ESD Protection

Electrostatic Discharge (ESD) can damage 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 in the

equipment housing.

To avoid delivering high static voltages to the product:

• Handle ESD-sensitive components on a properly grounded and protected ESD workbench

or by grounding yourself to the equipment chassis with a wrist strap and a resistive

connection cord.

• If you are unable to take either precaution, touch a conductive part of the equipment

chassis with your other hand before touching ESD-sensitive components.

• Hold component boards by the edges and avoid touching component contacts.

2.3 Regulatory Compliances

WAA151 complies with the following performance and environmental test standards:

WAA151 User Guide M210293EN-C

3. Installation

3.1 Selecting Location

Finding a suitable site for the product is important for getting representative ambient

measurements. Make sure that the site represents the general area of interest.

Allow sucient clearance for the wind sensors. Do not install wind sensors next to

a building or any other object that can aect the ﬂow of air.

Installations on top of high buildings or masts and in sites on open

grounds are vulnerable to lightning strikes. A nearby lightning strike may induce

a high-voltage surge not tolerable by the internal surge suppressors of the

instrument. Additional protection is needed in regions with frequent, severe

thunderstorms, especially when long line cables (>30 m (98 ft)) are used.

Vaisala recommends using a surge protector, such as WSP150, in all sites with an

elevated risk of a lightning strike.

CAUTION!

Chapter 3 – Installation

Figure 1 Recommended Mast Location in Open Area

Any object of height (h) does not remarkably disturb wind measurement at a minimum

distance of 10 × h. There must be at least 150 m (500 ft) open area in all directions from the

mast. Minimum distance between the mast and obstacles is ten times the height of an

obstacle.

WAA151 User Guide M210293EN-C

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