Vaisala WAT12 User Manual
Analog Wind Transmitter
WAT12
USER'S GUIDE
M210309EN-A
June 2002
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.
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Table of Contents
CHAPTER 1
GENERAL INFORMATION.......................................................5
About This Manual..................................................5
Contents of This Manual.......................................5
Version Information...............................................6
Related Manuals...................................................6
Safety .......................................................................6
General Safety Considerations.............................6
Product Related Safety Precautions.....................7
ESD Protection .....................................................7
Regulatory Compliances........................................8
Warranty ..................................................................8
CHAPTER 2
PRODUCT OVERVIEW.............................................................9
Introduction to WAT12 Analog Wind
Transmitter ..............................................................9
CHAPTER 3
INSTALLATION ......................................................................11
Selecting Location................................................11
Installation Procedure ..........................................13
Jumper Settings..................................................14
Connections........................................................16
Sensor Wiring.................................................18
Signal Output..................................................19
Powering ........................................................21
Optional Heating Power..................................22
Wiring Examples ............................................23
Mounting the Thermostat Switch ........................26
Mounting.............................................................27
Mounting WAT12 to the Top of a Pole Mast...27
Mounting Wind Sensors to WAT12 ................28
Alignment............................................................29
Verification..........................................................29
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CHAPTER 4
MAINTENANCE...................................................................... 31
Periodic Maintenance .......................................... 31
Visual Checking ................................................. 31
Testing Proper Operation................................... 31
Replacing Consumables...................................... 33
Parts List for Consumables................................ 33
CHAPTER 5
TROUBLESHOOTING............................................................ 35
Common Problems .............................................. 35
Error Messages .................................................... 35
Getting Help.......................................................... 36
Return Instructions .............................................. 37
CHAPTER 6
TECHNICAL DATA................................................................. 39
Specifications....................................................... 39
List of Figures
Figure 1 WAT12 Analog Wind Transmitter ........................... 10
Figure 2 Recommended Mast Location in Open Area.......... 11
Figure 3 Recommended Mast Length on Top of
a Building ............................................................... 12
Figure 4 Location of the Jumpers......................................... 14
Figure 5 Jumpers for the Setting: 4 ... 20 mA, 0° ... 360°,
0 ... 51.2 m/s........................................................... 15
Figure 6 Jumpers for the Setting: 1 ... 5 mA, 0° ... 360°,
0 ... 76.8 m/s........................................................... 16
Figure 7 Jumpers for the Setting: 0 ... 10 mA, 0° ... 540°,
0 ... 51.2 m/s........................................................... 16
Figure 8 Cable Shield Bent over the Plastic Sleeve
and O-ring .............................................................. 17
Figure 9 I/O Connectors ....................................................... 17
Figure 10 Wiring of the Sensors............................................. 18
Figure 11 Typical System with 24 VDC Power Supply
and 5 mA Signal Currents ...................................... 19
Figure 12 Wiring for High Noise Environment ........................ 20
Figure 13 Long Distance Wiring ............................................. 20
Figure 14 Long Distance Wiring with Four Wires ................... 21
Figure 15 Default Heating Power Connection with both
Sensors .................................................................. 22
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Figure 16 Basic Wiring with WAA151 and WAV151
Sensors...................................................................23
Figure 17 Wiring with WHP151 Mains Power Supply .............24
Figure 18 Wiring with WHP25 Mains Power Supply
and the 252 Series Wind Sensors ..........................25
Figure 19 Mounting the Thermostat Switch inside
the WAT12 Junction Box ........................................26
Figure 20 Standard Connection for Thermostat Switch ..........27
Figure 21 Mounting WAT12 to the Top of a Pole Mast ...........27
Figure 22 Installation of the Wind Sensors WAA151 and
WAV151 to WAT12.................................................28
List of Tables
Table 1 Manual Revisions......................................................6
Table 2 Related Manuals.......................................................6
Table 3 Jumper Settings for the 1 to 5 mA Current Loop.....15
Table 4 I/O Connectors........................................................18
Table 5 Power Line Resistance with an 24 VDC Power
Supply.....................................................................21
Table 6 Jumper Selectable Reference Sources
for Testing...............................................................32
Table 7 Output Values for the Jumpers in the Test Mode....32
Table 8 Available Spare Parts .............................................33
Table 9 Some Common Problems and their Remedies.......35
Table 10 WAT12 Analog Wind Transmitter Specifications ....39
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Chapter 1 ___________________________________________ General Information
CHAPTER 1
GENERAL INFORMATION
About This Manual
This manual provides information for installing and
maintaining WAT12 Analog Wind Transmitter.
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 WAT12 Analog
Wind Transmitter 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 basic maintenance of WAT12 Analog Wind
Transmitter.
- Chapter 5, Troubleshooting, describes common problems,
their probable causes and remedies, and provides contact
information.
- Chapter 6, Technical Data, provides technical data of
WAT12 Analog Wind Transmitter.
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Version Information
Table 1 Manual Revisions
Manual Code Description
T649en-1.1 WAT12 Analog Wind Transmitter -
Technical Reference.
M210309EN-A This manual, the first version of WAT12
Analog Wind Transmitter User's Guide.
Supersedes the above mentioned
Technical Reference.
Related Manuals
Table 2 Related Manuals
Safety
WARNING
Manual Code Manual Name
M210293en WAA151 Anemometer - User's Guide
M210294en WAV151 Wind Vane - User's Guide
General Safety Considerations
Throughout the manual, important safety considerations are
highlighted as follows:
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
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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.
Chapter 1 ___________________________________________ General Information
NOTE
WARNING
CAUTION
Note highlights important information on using the product.
Product Related Safety Precautions
WAT12 Analog Wind Transmitter delivered to you has
been tested for safety and approved as shipped from the
factory. Note the following precautions:
Ground the product, and verify the grounding of the
outdoor installation periodically to minimize shock hazard.
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
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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
WAT12 Analog Wind Transmitter is a CE compliant
product.
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.
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Chapter 2 ____________________________________________ Product Overview
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces WAT12 Analog Wind Transmitter
features.
Introduction to WAT12 Analog Wind Transmitter
The WAT12 transmitter converts the digital data supplied
by the Vaisala 151 and 252 Series wind sensors, into two
industry standard analog current loops; one representing the
wind speed and the other the wind direction. The current
loops are suitable for connection to, for example, chart
recorders, analog or digital panel meters, analog inputs of
computers, or other instruments with an analog input
interface. The power to the sensors is also supplied through
the WAT12 transmitter. The transmitter accepts a wide
range of input power, from 12 to 28 VDC.
The WAT12 transmitter consists of a printed circuit board
unit in a junction box and a cross arm for mounting the wind
sensors, see Figure 1 on page 10. A 4-wire cable for the
wind speed and direction signals and power supply is
needed between the transmitter and the receiving end.
The loop current is user selectable. The loops are supplied
by high-side drivers with a return to the signal and power
ground; thus nearly any input type can be driven.
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The WAT12 transmitter provides the sensors with a
throughput for optional heating power. A thermostat switch
is available as an option to automatically connect the
heating power in temperatures below +4 °C.
0206-041
Figure 1 WAT12 Analog Wind Transmitter
The following numbers refer to Figure 1 above:
1 = Flange for mounting a Vaisala anemometer
2 = Junction box, containing the circuit board
3 = Flange for mounting a Vaisala wind vane
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Chapter 3 __________________________________________________ Installation
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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