Vaisala WMT700 User Manual

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USER'S GUIDE

Vaisala WINDC AP © Ult raso ni c

Wind Sensor Serie s

WMT700

M211095EN-E

Vaisala Oyj Phone (int.): +358 9 8949 1 P.O. Box 26 Fax: +358 9 8949 2227 FI-00421 Helsinki Finland

Visit our Internet pages at www.vaisala.com.

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 copyright holder. Translated manuals 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 manual are subject to change without prior notice. This manual 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.

_________________________________________________________________________________

CHAPTER 1

GENERAL INFORMATION .......................................................................... 11

About This Manual ................................................................. 11

Contents of This Manual ..................................................... 11

Version Information ............................................................. 12

Related Manuals ................................................................. 12

Documentation Conventions ............................................... 13

Safety ....................................................................................... 13

Recycling ................................................................................ 14

Regulatory Compliances ....................................................... 15

Trademarks ............................................................................. 16

Warranty .................................................................................. 16

CHAPTER 2

PRODUCT OVERVIEW ................................................................................ 17

Introduction to WMT700 ........................................................ 17

Ordering Options ................................................................. 23

Measurement Range...................................................... 23

Temperature Range ....................................................... 23

Heating ........................................................................... 24

Digital Communication Interface .................................... 24

Digital Communication Profile ........................................ 25

Digital Communication Units .......................................... 25

Analog Output Signal for Wind Speed Channel ............. 26

Analog Output Signal for Wind Direct ion Cha nne l ......... 27

Connection Cables ......................................................... 27

Mounting Adapters ......................................................... 28

Accessories .................................................................... 28

Manual ........................................................................... 29

Example of WMT703 Configuration ............................... 29

Accessories ......................................................................... 30

Bird Cage ....................................................................... 31

WM Verifier .................................................................... 32

Cables ............................................................................ 33

Cable Tightening Tool .................................................... 34

CHAPTER 3

FUNCTIONAL DESCRIPTION ..................................................................... 35

Operating Principle ................................................................ 35

Coordinate Systems: Vector and Polar Calculations ......... 38

Wind Speed and Direction Averaging .................................. 40

Scalar Averaging ................................................................. 40

Wind Direction Coasting ................................................ 41

Vector Averaging ................................................................. 41

Measurement Methods .......................................................... 42

Continuous Measurement ................................................... 42

VAISALA _________________________________________________________________________ 1

User's Guide ______________________________________________________________________

Wind Measurement on Request .......................................... 42

Host System Connections and Interfaces ............................ 43

Serial Communication and Analog Output .......................... 45

Serial Communication ............................................................ 45

Digital Communication Interface .......................................... 45

Profiles ................................................................................. 46

Protocols .............................................................................. 47

Measurement and Configuration Modes ............................. 47

Serial Interface Timing ......................................................... 49

Analog Output ......................................................................... 50

Analog Output Types ........................................................... 50

Analog Output Scaling ......................................................... 52

Limitations for Output Signals .............................................. 54

Missing Readings and Error Indication ................................ 55

CHAPTER 4

INSTALLATION ............................................................................................ 57

Maritime Installations ............................................................. 57

Selecting Installation Location .............................................. 58

Installation Procedure ............................................................ 62

Unpacking ............................................................................ 62

Mounting .............................................................................. 63

Mounting on Vertical Pole Mast ...................................... 64

Mounting on Horizontal Cross Arm ................................ 68

Checklist for Connection Cables ......................................... 73

Alignment ............................................................................. 74

Alignment Tuning ............................................................ 75

Installing Bird Cage ............................................................. 75

Wiring ....................................................................................... 77

Cables .................................................................................. 77

Cable 2 m, Cable 10 m, Cable 15 m, and Cable

26 m ..................................................................................... 78

RS485 for COM2 with Cable 2 m and 10 m ................... 79

RS485 Cable 2 m and RS485 Cable 10 m .......................... 80

Connector Signals ............................................................... 81

Heating ..................................................................................... 82

Heated Transducers ............................................................ 82

Heated Transducers and Arms ............................................ 83

Heated Body, Transducers, and Arms ................................ 83

Powering .................................................................................. 84

Operating Power .................................................................. 84

Heating Power ..................................................................... 87

Power and Cable Recommendations for Fully

Heated WMT700 ............................................................ 87

Upgrading from WS425 to WMT700 ...................................... 89

Mounting with WS425 Mounting Kit..................................... 90

Before You Start .................................................................. 94

Mounting Procedure ............................................................ 96

Tightening Connector ..................................................... 97

Checklist for Connection Cables ......................................... 98

Wiring in Retrofit Installations............................................... 99

Using Standard WMT700 Cables ........................................ 99

ROSA Cable 10 m (Analog Outputs) ............................ 100

Using WS425 Cables with Adapters ................................. 101

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Adapter Cable for WS425 Serial Output ...................... 101

Adapter Cable for WS425 Analog Frequency

Output .......................................................................... 102

Adapter Cable for WS425 Analog Voltage Output ....... 103

Differences between WMT700 and WS425 Analog

Output Signals ................................................................... 104

Powering in Retrofit Installa tions ....................................... 105

CHAPTER 5

OPERATION ............................................................................................... 107

Serial Connection to WMT700 ............................................. 107

Communicating with Terminal Software ........................... 107

Entering and Exiting Configuration Mode ......................... 109

OPEN — Entering Configuration Mode ............................ 109

CLOSE — Exiting Configuration Mode ............................. 109

Configuration ........................................................................ 110

Configuration Overview ..................................................... 110

Parameter Handling Commands ......................................... 111

S — Set Parameter ........................................................... 112

G — Get Parameter .......................................................... 113

Get All Parameters ....................................................... 113

Get Specified Parameters ............................................ 113

BAUD — Display or Set Port Settings .............................. 114

Set Port Settings .......................................................... 114

Display Port Settings .................................................... 114

Wind Measurement Control Commands ............................ 115

MEAS — Single Wind Measurement ................................ 115

START — Start Continuous Measurement ....................... 115

STOP — Stop Wind Measurement ................................... 115

Diagnostics and Support Commands ................................ 116

ERRORS — Get Error Codes and Counts ....................... 116

CLEARERR — Reset Error Codes and Cou nts ................ 117

POLL — Get Message ...................................................... 117

RESET — Reset CPU ....................................................... 117

Information Commands ....................................................... 117

? — Display Command Set ............................................... 117

H — Display Help and Messages ..................................... 117

VERSION — Show Firmware Version .............................. 118

WIND_GET — Get Calibration Data ................................. 118

Configuration Parameters ................................................... 118

User-Configurable Data Messages ..................................... 119

Configuring Data Messages .............................................. 119

Items for Data Messages ............................................. 119

Status Flags ...................................................................... 123

Loading Settings from Configuration File .......................... 124

Operating WMT700 ............................................................... 126

Operating WMT700 with Term inal Progr am ..................... 126

Data Messages ................................................................. 127

WMT700 Data Message 21 ......................................... 129

WMT700 Data Message 22 ......................................... 129

WMT700 Data Message 23 ......................................... 130

WMT700 Data Message 24 ......................................... 131

WMT700 Data Message 25 ......................................... 132

ROSA - MES12 Data Message .................................... 133

VAISALA _________________________________________________________________________ 3

User's Guide ______________________________________________________________________

Missing Readings .............................................................. 133

Error Indication .................................................................. 134

Measurement Mode Commands ......................................... 135

WMT700 Profile Commands ............................................. 135

MEAS — Start Measurement ....................................... 136

OPEN — Enter Configuration Mode ............................. 136

POLL — Poll Data ........................................................ 137

SLEEP — Enter Low-Power Mode ............................... 137

ROSA - MES12 Profile Commands ................................... 138

M 12 — Poll MES12 Data Mess age ............................. 138

Operating WMT700 in WS425 Analog Output Mode ......... 139

Analog Output Settings ...................................................... 139

Wind Speed Output .............................................................. 141

Frequency .......................................................................... 141

Voltage ............................................................................... 142

Wind Direction Output .......................................................... 143

Limitations for Output Signals ............................................ 144

Missing Readings and Error Indic ation .............................. 144

Operating WMT700 with WS425 and SDI-12 Profiles ........ 145

Communication Profiles ...................................................... 145

Changing Communication Profile ...................................... 145

Operating WMT700 with Terminal Program ....................... 146

Entering Configuration Mode .............................................. 147

WS425 F/G ASOS Profile ...................................................... 148

Configurable Parameters ................................................... 148

WS425 F/G ASOS Commands ......................................... 149

WA — Fetch Averaged Wind Speed and

Direction ....................................................................... 150

WS — Fetch Internal Diagnostics Information ............. 150

WS425 F/G ASOS Data Message..................................... 152

WS425 A/B NMEA Standard Profile .................................... 154

Configurable Parameters ................................................... 154

WS425 A/B NMEA Standard Data Message ..................... 155

Missing Readings ......................................................... 155

WS425 NMEA Extended Profile (v . 0183) ........................... 156

Configurable Parameters ................................................... 156

WS425 A/B NMEA Extended Commands ......................... 157

WS425 A/B NMEA Extended Data Message .................... 158

Missing Readings ......................................................... 158

WS425 A/B ASCII Profile ...................................................... 159

Configurable Parameters ................................................... 159

WS425 A/B ASCII Commands .......................................... 160

I — Identify Sensor ....................................................... 160

Wx — Start Measurement ............................................ 160

Missing Readings ......................................................... 162

WS425 A/B WAT11 Profile ................................................... 163

Configurable Parameters ................................................... 163

WS425 A/B WAT11 Commands ........................................ 163

Missing Readings ......................................................... 164

SDI-12 Profile (v 1.3) ............................................................. 165

Configurable Parameters ................................................... 166

SDI-12 Commands ............................................................ 167

?! — Address Query ..................................................... 168

a! — Acknowledge Active ............................................. 169

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aAb! — Change Address ............................................. 170

aC! — Start Concurrent Measurement ........................ 171

aD0! — Send Data ....................................................... 172

aI! — Send Identification .............................................. 172

aM! — Start Measurement ........................................... 173

aV! — Start Verification ................................................ 175

SDI-12 Data Messages ..................................................... 176

WS425 A/B SDI-12 Message for C and M

Command ..................................................................... 176

Missing Readings .................................................... 176

WS425 A/B SDI-12 Message for V Command ............ 177

Requesting Cyclic Redundancy Check ........................ 177

CHAPTER 6

MAINTENANCE ......................................................................................... 179

Periodic Maintenance .......................................................... 180

Visual Inspection .................................................................. 180

Cleaning ................................................................................ 180

Testing Proper Operation .................................................... 181

CHAPTER 7

TROUBLESHOOTING ............................................................................... 183

Problem Situations ............................................................... 183

Error and Event Messages .................................................. 185

Restoring Serial Port Settings ............................................ 186

Technical Support ................................................................ 188

Product Returns ................................................................... 188

CHAPTER 8

TECHNICAL DATA .................................................................................... 189

Dimensions ........................................................................... 193

APPENDIX A

COMPLETE COMMAND SET FOR WMT700 ........................................... 195

APPENDIX B

TYPICAL SYSTEM ENVIRONMENTS ....................................................... 197

APPENDIX C

DEFAULT SETTINGS FOR DIFFERENT COMMUNICATION

PROFILES .................................................................................................. 201

APPENDIX D

CONFIGURATION PARAMETERS ........................................................... 205

VAISALA _________________________________________________________________________ 5

User's Guide ______________________________________________________________________

APPENDIX E

WMT700 NMEA MWV PROFILE ................................................................ 209

Configurable Parameters ................................................... 210

WMT700 NMEA MWV Commands ................................... 211

WMT700 NMEA MWV Data Message .............................. 212

Missing Readings ......................................................... 212

APPENDIX F

ACCESSORIES .......................................................................................... 213

APPENDIX G

CERTIFICATES .......................................................................................... 217

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List of Figures

Figure 1 WMT700 Wind Sensor ............................................................. 18

Figure 2 WMT700 Wind Sensor from Below .......................................... 19

Figure 3 FIX70 Mounting Kit ................................................................... 20

Figure 4 WS425FIX60-POM ................................................................... 21

Figure 5 WMT70FIX60-POM .................................................................. 21

Figure 6 WS425FIX60-RST and WS425FIX60 ...................................... 22

Figure 7 WMT70FIX60-RST ................................................................... 22

Figure 8 Bird Cage ................................................................................. 31

Figure 9 WM Verifier ............................................................................... 32

Figure 10 Cable Tightening Tool .............................................................. 34

Figure 11 Ultrasonic Measurement Principle ........................................... 36

Figure 12 Measurement Paths of WMT700 ............................................. 37

Figure 13 Different Wind Speed and Direction Pres ent ati ons

(Direction Offset Is 0) ............................................................... 39

Figure 14 Example of Wind Direction Averaging ...................................... 41

Figure 15 External Interfaces of WMT700 ................................................ 44

Figure 16 Configuration and Measurement Modes .................................. 48

Figure 17 Timing for RS-232, RS-485, and RS-422 Interfaces ................ 49

Figure 18 Frequency Output ..................................................................... 51

Figure 19 Recommended Location in Open Area .................................... 59

Figure 20 Recommended Mast Length on Top of Building ...................... 60

Figure 21 Minimum Distance between Two WMT700 Devices

Installed at Same Height .......................................................... 61

Figure 22 Sensor Handling ....................................................................... 62

Figure 23 WMT700 and Transportation Damper ...................................... 63

Figure 24 Inserting Cable in Cable Tightening Tool ................................. 64

Figure 25 Attaching Connector to WMT700 ............................................. 65

Figure 26 WMT700 on Side of Pole Mast ................................................ 66

Figure 27 WMT700 on Top of Pole Mast ................................................. 67

Figure 28 WMT700 on Cross Arm with Array Facing Up ......................... 69

Figure 29 WMT700 on Cross Arm with Array Facing Down .................... 70

Figure 30 Tightening Connector with Cabl e Tight eni ng Tool ................... 71

Figure 31 Tightening Connector without Cable Tightening Tool .............. 72

Figure 32 Correctly Aligned WMT700 ...................................................... 74

Figure 33 Incorrectly Aligned WMT700 and Resulting Offset Error ......... 75

Figure 34 Bird Cage and Bird Cage Straps .............................................. 76

Figure 35 COM2 RS485 Wiring ................................................................ 79

Figure 36 Pins for 17-Pin M23 Connector ................................................ 81

Figure 37 Wiring of Non-heated WMT700 Versions ................................. 85

Figure 38 Operating Supply Current Consumption .................................. 86

Figure 39 Operating Supply Power Cons umption .................................... 86

Figure 40 Wiring of Heated WMT700 Versions, Part 1 ............................ 88

Figure 41 Wiring of Heated WMT700 Versions, Part 2 ............................ 88

Figure 42 Retrofit Installation to Pole Mast .............................................. 91

Figure 43 Retrofit Installation to Cross Arm with Array Facing Up ........... 92

Figure 44 Retrofit Installation to Cross Arm with Array Facing

Down ........................................................................................ 93

Figure 45 FIX30, WS425FIX60-RST, and WS425FIX60-POM ................ 94

Figure 46 Mounting Adapter for FIX30, WS425FIX60 (Left), and

Mounting Adapter for FIX70 (Right) ......................................... 95

Figure 47 WS425 Adapter Cable .............................................................. 96

Figure 48 Wind Speed Frequency Analog Output with WS425

Cable and Adapter Cable for Analog Frequency Output ....... 141

VAISALA _________________________________________________________________________ 7

User's Guide ______________________________________________________________________

Figure 49 Figure 50 Wind Direction Voltage Output with WS425 Cable and

Figure 51 Testing WMT700 with WM Verifier ......................................... 182

Figure 52 WMT700 Dimensions in Millimeters ....................................... 193

Figure 53 FIX70 Mounting Kit Dimensions in Millimeters ....................... 194

Figure 54 System Environment with Serial Port COM1 Only ................. 197

Figure 55 System Environment with Analog Output Only....................... 198

Figure 56 System Environment with Serial Ports COM1 and

Figure 57 System Environment with Backup Battery .............................. 200

Figure 58 Complete Set of Accessories.................................................. 214

Wind Speed Voltage Analog Output with WS425 Cable

and Adapter Cable for Analog Voltage Output ....................... 142

Adapter Cable ......................................................................... 143

COM2 ...................................................................................... 199

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List of Tables

Table 1 Manual Revisions ..................................................................... 12

Table 2 Related Manuals ...................................................................... 12

Table 3 Environmental Tests ................................................................. 15

Table 4 Electromagnetic Compatibility Tests ........................................ 16

Table 5 Measurement Ranges of Different Sensor Types .................... 23

Table 6 Temperature Ranges ............................................................... 23

Table 7 Heating ..................................................................................... 24

Table 8 Digital Communication Interface .............................................. 24

Table 9 Digital Communication Profile .................................................. 25

Table 10 Digital Communication Options ................................................ 25

Table 11 Output Configuration ................................................................ 26

Table 12 Analog Output Signal for Wind Direction .................................. 27

Table 13 Analog Output Configuration .................................................... 28

Table 14 Mounting Adapters ................................................................... 28

Table 15 Accessories .............................................................................. 28

Table 16 Manual ...................................................................................... 29

Table 17 Cables ...................................................................................... 33

Table 18 Factory Settings for Analog Wind Speed Output ..................... 52

Table 19 Factory Default Settings for Analog Wind Direction

Output ....................................................................................... 52

Table 20 Common Transfer Function Settings for AOUT1 (WS) ............ 53

Table 21 Common Transfer Function Settings for AOUT2 (WD) ............ 53

Table 22 Connecting Cable 2 m (227567SP),

Cable 10 m (227568SP), Cable 15 m (237890SP), and

Cable 26 m (237889SP) ........................................................... 78

Table 23 COM2 RS485 Wiring ................................................................ 79

Table 24 Connecting RS485 Cable 2 m (228259SP) and

RS485 Cable 10 m (228260SP) ............................................... 80

Table 25 Pin-Out for 17-Pin M23 Co nnec tor ........................................... 81

Table 26 Operating Power Supply Voltage Requirements ..................... 84

Table 27 Heating Power Supply Requirements ...................................... 87

Table 28 Heating Power and Extension Cable ....................................... 87

Table 29 Mounting Kits and Cable Codes ............................................... 95

Table 30 ROSA Cable 10 m (231425SP) ............................................. 100

Table 31 Pin-Outs for WS425 Serial Adapter Cable (227569SP) ......... 101

Table 32 Pin-Outs for WS425 Analog Frequency Output Adapter

Cable ...................................................................................... 102

Table 33 Pin-Outs for WS425 Analog Voltage Output Adapter

Cable ...................................................................................... 103

Table 34 Analog Output Connections ................................................... 104

Table 35 List of Configuration Mode Commands .................................. 111

Table 36 Wind Measurement Items for Data Messages ....................... 120

Table 37 Control Character and Checksum Items for Data

Messages ............................................................................... 120

Table 38 Monitoring Items for Data Messages ..................................... 121

Table 39 Status Flags ........................................................................... 123

Table 40 Data Messages ...................................................................... 128

Table 41 Measurement Mode Commands ............................................ 136

Table 42 Required Parameters for WS425 Analog Output

Operation Mode ...................................................................... 140

Table 43 Configurable Parameters for WS425 F/G ASOS Profile ........ 148

Table 44 WS425 F/G ASOS Commands .............................................. 149

Table 45 WS425 F/G ASOS Data Message ......................................... 152

VAISALA _________________________________________________________________________ 9

User's Guide ______________________________________________________________________

Table 46 Table 47 Configurable Parameters for WS425 A/B NMEA

Table 48 Checksum Table ..................................................................... 157

Table 49 Configurable Parameters for WS425 A/B ASCII Profile ......... 159

Table 50 WS425 A/B ASCII Commands ............................................... 160

Table 51 WS425 A/B ASCII Data Message .......................................... 161

Table 52 Configurable Parameters for WS425 A/B WAT11 Profile ...... 163

Table 53 Configurable Parameters for SDI-12 Profile ........................... 166

Table 54 SDI-12 Commands ................................................................. 167

Table 55 Some Problem Situations and Their Remedies...................... 183

Table 56 Error and Event Messages ..................................................... 185

Table 57 Restored Serial Port Settings ................................................. 187

Table 58 Wind Speed ............................................................................ 189

Table 59 Wind Direction ........................................................................ 189

Table 60 Outputs ................................................................................... 190

Table 61 General ................................................................................... 191

Table 62 Accessories............................................................................. 192

Table 63 Command Set for All Profiles.................................................. 195

Table 64 Default Settings for Different Digital Communication

Table 65 Parameters without Protocol-Specific Default Value .............. 203

Table 66 Parameter Descriptions .......................................................... 205

Table 67 Configurable Parameters for WMT700 NMEA

Configurable Parameters for WS425 A/B NMEA

Standard Profile ...................................................................... 154

Extended Profile ..................................................................... 156

Profiles .................................................................................... 202

MWV Profile ............................................................................ 210

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Chapter 1 _________________________________________________________ General Information

CHAPTER 1

GENERAL INFORM ATION

This chapter provides general notes for the manual and the WMT700 series.

About This Manual

This manual provides information for installing, operating, and maintaining Vaisala WINDCAP® Ultrasonic Wind Sensors WMT701, WMT702, and WMT703, commonly referred to as WMT700.

Contents of This Manual

This manual consists of the following chapters:

- Chapter 1, General Information, provides general notes for the manual and the WMT700 series.

- Chapter 2, Product Overview, introduces the features, advantages, and product nomenclature of WMT700.

- Chapter 3, Functional Description, describes the functionality of WMT700.

- Chapter 4, Installation, contains information that is needed to install WMT700.

- Chapter 5, Operation, contains information on WMT700 configuration, operating commands, protocols, and data messages.

- Chapter 6, Maintenance, contains information on performing visual inspection, cleaning, and verifying the operation of WMT700.

- Chapter 7, Troubleshooting, describes common problems, their probable causes and remedies, and provides contact information for technical support.

- Chapter 8, Technical Data, provides the technical data of WMT700.

- Appendix A, Complete Command Set for WMT700, lists all the commands available for WMT700.

VAISALA ________________________________________________________________________ 11

User's Guide ______________________________________________________________________

Manual Code

Description

M211095EN-E

August 2013. This manual. Combined User’s Guide

Options and Accessories.

M211095EN-D

Previous version.

M211095EN-A

First version of this manual.

Manual Code

Manual Name

M211218EN

Vaisala WINDCAP© Ultrasonic Wind Sensor Series WMT700 Quick Reference Guide

- Appendix B, Typical System Environments, lists the most typical WMT700 system environments.

- Appendix C, Default Settings for Different Communication Profiles, lists the default settings for different digital communication profiles.

- Appendix D, Configuration Parameters, lists the WMT700 configuration parameters.

- Appendix E, WMT700 NMEA MWV Profile, lists the configurable parameters, commands, and data messages of the WMT700 NMEA MWV profile.

- Appendix F, Accessories, lists all the accessories available for WMT700.

- Appendix G, Certificates, contains copies of certificates issued for WMT700.

Version Information

Table 1 Manual Revisions

and Technical Reference. Updated Heating with new fully heated WMT700. Updated Ordering

Related Manuals

Table 2 Related Manuals

12 ___________________________________________________________________ M211095EN-E

Chapter 1 _________________________________________________________ General Information

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 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 highlights important information on using the product.

To protect personnel (and the wind sensor) installed with the tip at least one meter above WMT700. The rod must be properly grounded, compliant with all local applicable safety regulations. Do not install the wind sensor above the top of the lightning protection rod.

If ice or snow accumulates on WMT700 or the mast, it can fall and cause injury to persons below.

Some WMT700 product versions provide heating for transducers and/or array arms. To avoid injury, do not touch the heated parts of the wind se

Documentation Conventions

Throughout the manual, important safety considerations are highlighted as follows:

WARNING

CAUTION

NOTE

Safety

WARNING

Vaisala WINDCAP® Ultrasonic Wind Sensor WMT701, WMT702, or WMT703 delivered to you has been tested for safety and approved as shipped from the factory. Note the following precautions:

, a lightning rod must be

WARNING

nsor when the heating is enabled.

VAISALA ________________________________________________________________________ 13

User's Guide ______________________________________________________________________

Make sure that you connect only de

Using a long cable between different units (sensors, transmitters, power supplies, and displays) can cause a lethal surge voltage, if a lightning st and follow the requirements of the local Electrical Code.

Do not install WMT700 when there is a risk of thunderstorm or lightning activity in the area.

Do not Improper modification can damage the product or lead to malfunction.

When handling WMT700, do not rotate, pull, strike, bend, scrape or touch the transducers with sharp objects. Any impact on the wind sensor array

The heating each both must be connected to each other. Leaving one terminal unconnected or connecting it to the ground may cause a WMT700 malfunction or a short circuit in the power supply.

Recycle all applicable material.

Dispose of batteries and the unit according to statutory regulations. Do

WARNING

CAUTION

-energized wires.

rike occurs in the vicinity. Always apply proper grounding procedures

modify the unit. There are no user-serviceable parts inside.

CAUTION

Recycling

may damage the device.

power supply wires of WMT700 are internally connected to

other. If the connection cable has two positive heating supply wires,

not dispose of with regular household refuse.

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Chapter 1 _________________________________________________________ General Information

Test

Setup According to

Wind driven rain

MIL-STD 810G Method 506.5 and Telcordia GR-487-Core

Salt fog

VDA 621 - 415 / IEC 60068-2-52

Leak test (Ingression Protection)

IEC 60529 class IP67

Vibration

IEC 60068-2-6 / IEC 60945 / Lloyd's test

Shock

MIL-STD-202G, Method 213B, cond. J

Dry heat

IEC 60068-2-2 / IEC 60068-2-48

Damp heat cyclic

IEC 60068-2-30, Test Db

Damp heat

IEC 60068-2-78

Low temperature

IEC 60068-2-1 Test Ab/Ad

Free fall (rough handling)

IEC 60068-2-31

Change of temperature

IEC 60068-2-14

Regulatory Compliances

Vaisala WINDCAP® Ultrasonic Wind Sensor WMT701, WMT702, and WMT703 comply with the performance and environmental test standards listed in Table 3 below.

Wind tunnel tests have been performed according to Sonic anemometers/thermometers - Acceptance test methods for mean wind measurements ISO 16622:2002 and Measnet Anemometer Calibration Procedure Version 2, October 2009.

Table 3 Environmental Tests

EMC tests are based on a European product family standard: EN 61326-1:2006 (Electrical equipment for measurement, control and laboratory use - EMC requirements for use in industrial locations) and EN 60945:2002 (Maritime Navigation and Radiocommunication Equipment and Systems - General Requirements - Methods of Testing and Required Test Results).

VAISALA ________________________________________________________________________ 15

User's Guide ______________________________________________________________________

Test

Setup According to

Conducted RF immunity

IEC 61000-4-6

EFT immunity

IEC 61000-4-4

Surge immunity

IEC 61000-4-5

ESD immunity

IEC 61000-4-2

High voltage (Dielectric tests)

IEC 60947-2

Conducted emissions

CISPR 22

Radiated emissions

CISPR 22

RF field immunity

IEC 61000-4-3

Insulation resistance

IEC 60092-504

equipment and systems required test results. 4th edition, 200 2 Appendix

Table 4 Electromagnetic Compatibility Tests

Limits according to IEC 60945: Maritime navigation and radiocommunication

- General requirements - Methods of testing and

-08. See Det Norske Veritas Certificate in

G on page 217.

Trademarks

Warranty

The WMT700 series wind sensors are based on the advanced, patented Vaisala WINDCAP®wind measurement technology that ensures accurate results in all wind directions. The effects of temperature, humidity, and pressure are also fully compensated.

Windows®is a registered trademark of Microsoft Corporation in the United States and/or other countries.

Visit our Internet pages for our standard warranty terms and conditions: www.vaisala.com/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 OVERVIE W

This chapter introduces the features, advantages, and product nomenclature of WMT700.

Introduction to WMT700

Vaisala WINDCAP® Ultrasonic Wind Sensor WMT700 measures wind speed and direction, and sends the measurement results to data acquisition systems. WMT700 forms part of the Vaisala weather measurement offering suitable for systems and standalone installations.

The WMT700 series consists of three product types with different measurement ranges: WMT701, WMT702, and WMT703. Additionally, you can select heating functions that shield the array and/or the transducers and the sensor body from ice and snow buildups in cold climates.

The WMT700 series wind sensors are based on the advanced, patented Vaisala WINDCAP® wind measurement technology that ensures accurate results in all wind directions. The effects of temperature, humidity, and pressure are also fully compensated.

Since the WMT700 series wind sensors have no moving parts, they are virtually maintenance-free. The performance of the sensors does not degrade with wear nor is it affected by natural contaminants such as salt, dust, or sand.

The WMT700 series wind sensors support a wide range of communication options. You can connect the wind sensors directly to a variety of data acquisition systems without additional converters or adapters.

VAISALA ________________________________________________________________________ 17

User's Guide ______________________________________________________________________

The following numbers refer to Figure 1 above:

The array consists of 1, 2, and 3:

1 = Transducers (3 pcs)

2 = Top of WMT700. There is a north arrow on top of WMT700.

3 = Transducer arms (3 pcs)

4 = Enclosure

5 = Mounting screw

6 = Mounting adapter

7 = Type label

WMT700 is configured at the factory according to the customer's order, and it is ready for operation directly after the installation. If required, the user also has a wide range of configuration options for the wind sensor and the measurement settings.

WMT700 can be equipped with accessories to tailor the instrument to match different user-specific needs. The accessories include a bird deterrent solution and a field-usable calibration verifier.

1003-005

Figure 1 WMT700 Wind Sensor

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Chapter 2 ___________________________________________________________ Product Overview

The following numbers refer to Figure 2 above:

1 = Waterproof vent

2 = Mounting adapter screw (3 pcs; use Allen key 4 mm)

3 = 17-pin M23 male connector

Do not open the sensor. There are no user

1104-065

Figure 2 WMT700 Wind Sensor from Below

NOTE

-serviceable parts inside.

VAISALA ________________________________________________________________________ 19

User's Guide ______________________________________________________________________

The following numbers refer to Figure 3 above:

FIX70 consists of :

1 = Fix body

2 = Removable mast guide with mounting hardware

3 = Mounting hardware (M6 nuts, washers)

4 = U bolts for ø30 mm mast (2 pcs)

5 = U bolts for ø60 mm mast (2 pcs)

1104-064

Figure 3 FIX70 Mounting Kit

20 ___________________________________________________________________ M211095EN-E

Chapter 2 ___________________________________________________________Product Overview

The following numbers refer to Figure 4 above:

1=Clamp

2=Label

The following numbers refer to Figure 5 above:

1=Clamp

2=Label

1305-001

Figure 4 WS425FIX60-POM

Figure 5 WMT70FIX60-POM

VAISALA________________________________________________________________________ 21

1305-002

User's Guide ______________________________________________________________________

The following numbers refer to Figure 6 above:

1=Screw hole

2=Label

3=Clamp

The following numbers refer to Figure 7 above:

1=Screw holes

2=Label

3=Clamp

1305-003

Figure 6 WS425FIX60-RST and WS425FIX60

Figure 7 WMT70FIX60-RST

22___________________________________________________________________ M211095EN-E

1305-004

Chapter 2 ___________________________________________________________ Product Overview

Sensor Type

Measurement Range

WMT701 up to 40 m/s

WMT702 up to 65 m/s

WMT703 up to 75 m/s

WMT701 up to 40 m/s + Accredited Wind Calibration

WMT702 up to 65 m/s + Accredited Wind Calibration

WMT703 up to 75 m/s + Accredited Wind Calibration

Option

Temperature Range

-10 ... +60 °C

-40 ... +60 °C

-55 ... +70 °C

Ordering Options

A WMT700 unit can be configured by ordering options to suit versatile customer needs. You can reconfigure the following options:

- Digital communication interface

- Digital communication profile

- Digital communication units

- Analog output signals for wind speed channel

- Analog output signals for wind direction channel

Measurement Range

Ordering option 1, Measurement Range, defines the wind speed operation range for the sensor. The maximum reported value of wind speed 40, 65, or 75 m/s, depending on the selected option as shown in Table 5 below.

Table 5 Measurement Ranges of Different Sensor Types

Temperature Range

Ordering option 2, Temperature Range, defines the operating temperature range for the sensor as shown in Table 6 below.

Table 6 Temperature Ranges

Note that the temperature range is not connected to heating in any way. If you operate in a demanding environmental climate where ice accumulation is expected, Vaisala recommends that you use a heated sensor; see Option 4 in Table 7 on page 24.

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User's Guide ______________________________________________________________________

Option

Heating

Non-heated

Heated transducers (Min. 30 W power supply is needed)

Heated transducers and arms (Min. 200 W needed)

Heated transducers, arms, and body (Min. 350 W needed)

Option

Hardware Interface

RS-485 isolated (1 pair)

RS-422 isolated

RS-232 isolated

SDI-12 isolated

Heating

Ordering option 3, Heating, defines if the sensor is equipped with extra heating for demanding environmental conditions. Option 4 providing full sensor heating is best suited for most demanding environments. Note that power consumption requirement depends on the selected heating option.

Table 7 Heating

Digital Communicati on Interface

Ordering option 4, Digital Communication Interface, defines the serial line physical interface. Four different standard communication interfaces are available.

Table 8 Digital Communication Interface

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Chapter 2 ___________________________________________________________ Product Overview

Option

Communication Profile

WMT70 - default mode

9600, 8, N, 1

Polled

WS425 - ASCII

2400, 8, N, 1

Polled

WS425 - NMEA Extended (v 0183)

9600, 8, N, 1

Auto send 1/s

WS425 - SDI-12 (v 1.3)

1200, 7, E, 1

Polled

WS425 - ASOS

2400, 8, N, 1

Polled

ROSA - MES12

9600, 8, N, 1

Polled

US AWOS - NMEA Standard

2400, 8, N, 1

Autosend 5/s

FAA - Federal

9600, 8, N, 1

Polled

AWS520 - NMEA Extended (v 0183)

4800, 8, N, 1

Auto send 1/s

MARINE1 (v 0183)

4800, 8, N, 1

Auto send 1/s

MARINE2 (v 0183)

9600, 8, N, 1

Auto send 1/s

WIND TURBINE1 (default)

9600, 8, N, 1

Polled

WIND TURBINE2 (v 0183)

9600, 8, N, 1

Auto send 1/s

Option

Unit Used

Meters per second

Knots

Miles per hour

Kilometers per hour

Digital Communicati on Pr of ile

Ordering option 5, Digital Communication Profile, defines the communication protocol used for the sensor. WS425 options are usable and backwards compatible when replacing WS425 sensor with a WMT700 unit. MARINE and WIND TURBINE options are customer-specific profiles.

Table 9 Digital Communication Profile

Digital Communicati on Units

Ordering option 6, Unit Definition for Digital Communication, offers four different digital communication options.

Table 10 Digital Communication Options

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User's Guide ______________________________________________________________________

Option

Output Configuration

Disabled

Voltage output 100 mV/m/s

7500 mV = 75 m/s (WMT703 maximum wind speed)

Reserved for future use

Current output 4…20 mA, offset 4 mA

Error indication sets output to 2 mA

Current output 0.2 mA/m/s

15 mA = 75 m/s (WMT703 maximum wind speed)

Reserved for future use

Frequency output 10 Hz/m/s

750 Hz = 75 m/s (WMT703 maximum wind speed)

WS425 voltage output 8 mV/mph

1344 mV = 168 mph (WMT703 maximum wind speed)

WS425 frequency output 5 Hz/m ph

840 Hz = 168 mph (WMT703 maximum wind speed)

Reserved for future use

Push up output, 10 Hz/m/s

750 Hz = 75 m/s (WMT703 maximum wind speed)

Pull down output 10 Hz/m/s

750 Hz = 75 m/s (WMT703 maximum wind speed)

Analog Output Signal for Wi nd S peed Channel

Ordering option 7, Analog Output for Wind Speed, can be disabled or factory-configured for 8 different modes. WS425 options are usable and backwards compatible when replacing WS425 sensor with a WMT700 unit.

Table 11 Output Configuration

0 mV = 0 m/s 4000 mV = 40 m/s (WMT701 maximum wind speed) 6500 mV = 65 m/s (WMT702 maximum wind speed)

4 mA = 0 m/s 20 mA = 40 m/s (WMT701, 0.4 mA/m/s) 20 mA = 65 m/s (WMT702, 0.24615 mA/m/s) 20 mA = 75 m/s (WMT703, 0.21333 mA/m/s)

0 mA = 0 m/s 8 mA = 40 m/s (WMT701 maximum wind speed) 13 mA = 65 m/s (WMT702 maximum wind speed)

0 Hz = 0 m/s 400 Hz = 40 m/s (WMT701 maximum wind speed) 650 Hz = 65 m/s (WMT702 maximum wind speed)

0 mV = 0 m/s 716 mV = 89.5 mph (WMT701 maximum wind speed) 1116 mV = 145 mph (WMT702 maximum wind speed)

0 Hz = 0 m/s

447.5 Hz = 89.5 mph (WMT701 maximum wind speed) 725 Hz = 145 mph (WMT702 maximum wind speed)

0 Hz = 0 m/s 400 Hz = 40 m/s (WMT701 maximum wind speed) 650 Hz = 65 m/s (WMT702 maximum wind speed)

26 ___________________________________________________________________ M211095EN-E

0 Hz = 0 m/s 400 Hz = 40 m/s (WMT701 maximum wind speed) 650 Hz = 65 m/s (WMT702 maximum wind speed)

Chapter 2 ___________________________________________________________ Product Overview

Selection

Output Configuration

Disabled

Voltage output 20 mV/degree 7200 mV = 360 degree

Reserved for future use

Current output 50 uA/degree 18 mA = 360 degree

Current output 4…20 mA (44.444 uA/degree) 20 mA = 360 degree km/h

WS425 Potentiometer output 100% of V

ref

= 360 degree

Analog Output Signal for Wi nd Direction Channel

Ordering option 8 defines Analog Output Signal for Wind Direction.WS425 Potentiometer output is backward compatible when replacing WS425 with a WMT700 unit. For different wind speed and direction representations, see Figure 13 on page 39. Note that the wind direction offset must be 0 for the for the readings to correspond with Figure 13.

Table 12 Analog Output Signal for Wind Direction

0 mV = 0 degree

0 uA = 0 degree

4 mA = 0 degree

0% of V

= 0 degree

ref

Connection Cables

Ordering option 9 defines connection cables. There are several different cables of different lengths for different purposes, as shown in Table 13 on page 28.

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User's Guide ______________________________________________________________________

Selection

Cable type

No cables

Cable 2 m, cable connector, open leads on one end

Cable 10 m, cable connector, open leads on one end

MAWS cable 10 m

AWS520 cable 10 m. Shield connected to PE pin

Adapter cable for WS425 serial

Adapter cable for WS425 analog frequency output

RS485 cable 2 m, cable connector, open leads on one end

RS485 Cable 10 m, cable connector, open leads on one end A Adapter cable for WS425 analog voltage output

AWS520 cable 10 m. Shield not connected to PE pin.

ROSA analog cable 10 m, cable connector, open leads on one end

Junction Box with Cable 2 m

Cable 15 m, cable connector, open leads on one end

Cable 26 m, cable connector, open leads on one end

Option

Adapter Type

Adapter 228869 only. Standard adapter, no fix

Adapter 228869 with WMT70FIX70 fixing mechanics. Also general purpose

Adapter 228869 with WMT700FIX60-POM. Standard adapter with plastic fix for 60 mm pole

Adapter 228869 with WMT700FIX60-RST Standard adapter with stainless steel fix for 60 mm pole

Adapter 22877 only (used for old WS425 FIX30/WS425FIX60), WS425-compatible adapter, no fix

Ordering option 11 is reserved for future use.

Option

Accessories

No accessories

Bird cage WMT70BirdKit

Table 13 Analog Output Configuration

NOTE

Mounting Adapters

Ordering option 10 defines mounting adapters. There are several different mounting adapters for different purposes, as shown in Table 14 below.

Table 14 Mounting Adapters

suitable for inverted mounting. Standard adapter for

Accessories

Ordering option 12 defines WMT700 accessories.

Table 15 Accessories

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Chapter 2 ___________________________________________________________ Product Overview

Option

Manual

No manual

English manual

Japanese manual

Chinese manual

Russian manual

Deif manual and packing

Vaisala recommends using heated versions of WMT700 in environmental conditions where snow and ice build For page 82

If required, you can change communication profile, digital communication units, an signals for wind speed channel, and analog output signals for wind direction channel. Table

Manual

Ordering option 13, Manual, defines available manual version and possible special package design.

Table 16 Manual

Example of WMT703 Configuration

NOTE

more information on the heating functionality, see section Heating on

NOTE

To change the product version characteristics listed in

9 on page 25, contact Vaisala Service Center.

VAISALA ________________________________________________________________________ 29

-up is possible.

the digital communication interface, digital

alog output

User's Guide ______________________________________________________________________

Accessories

WMT700 can be tailored to your needs with several accessories. The accessories include, for example, mounting adapters for different mast diameters, cables for different host systems and preferred communication types, a bird prevention kit, and a field calibration kit.

When specifying your WMT700, you can order the optional FIX70 universal mounting adapter, a bird cage, WM Verifier, and cables as accessories for WMT700.

For the codes of the accessories that you need to order separately, see Table 62 on page 192. For a complete list of accessories, see Appendix F, Accessories, on page 213.

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Chapter 2 ___________________________________________________________ Product Overview

Bird Cage

Vaisala recommends using the optional bird cage in areas with large bird populations. The cage is designed to prevent large birds from disturbing the measurement. It has been tested in a wind tunnel with wind speeds of up to 40 m/s without noticeable effects on the wind speed and direction measurement.

You can install the bird cage on a mounted WMT700 series wind sensor without dismounting the wind sensor itself. In cold climates, take into account that accumulated snow or ice on the bird cage can disturb the measurement. In such conditions, consider performing frequent visual inspections of WMT700 to avoid ice or snow build-ups.

1005-028

Figure 8 Bird Cage

VAISALA ________________________________________________________________________ 31

User's Guide ______________________________________________________________________

WM Verifier

The optional WM Verifier is a small echo-free chamber for testing the mechanical integrity of WMT700 and performing onepoint calibration. The verifier ensures that the array is undamaged and the transducers are parallel to each other. You can perform the verifier test in a laboratory or in the field.

For instructions on performing the verifier test, see section Testing Proper Operation on page 181.

1004-119

Figure 9 WM Verifier

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Chapter 2 ___________________________________________________________ Product Overview

Order Code

Description

Purpose

WMT70Conn

Cable connector

Cable

227567SP

Cable 2 m, cable connector, open leads on one end

Used for analog output or serial communication with two serial ports.

227568SP

Cable 10 m, cable connector, open leads on one end

Used for analog output or serial communication with two serial ports.

237890SP

Cable 15 m, cable connector, open leads on one end

Used for analog output or serial communication with two serial ports.

237889SP

Cable 26 m, cable connector, open leads on one end

Used for analog output or serial communication with two serial ports.

228259SP

RS485 cable 2 m, cable connector, open leads on one end

Used for serial communication with RS485 interface.

228260SP

RS485 Cable 10 m, cable connector, open leads on one end

Used for serial communication with RS485 interface.

227565SP

MAWS cable 10 m

Used for connecting WMT700 to MAWS.

229807SP

AWS520 cable 10 m, shield connected

Used for connecting WMT700 to AWS520.

227566SP

AWS520 cable 10 m, shield not

Used for connecting WMT700 to AWS520.

231425SP

ROSA analog cable 10 m, cable connector, open leads on one end

Used for connecting WMT700 to Vaisala Road Weather System ROSA.

227569SP

Adapter cable for WS425 serial

Used for connecting the WS425 cable installations.

227570SP

Adapter cable for WS425 analog

Used for connecting the WS425 cable installations.

227571SP

Adapter cable for WS425 analog

Used for connecting the WS425 cable installations.

ASM210719SP

Junction Box with Cable 2 meters

Used when a cable longer than 10

2-meter cable to a needed length.

Cables

Select the required cables according to your operating environment.

Table 17 Cables

Vaisala Automatic Weather Station

to PE pin

connected to PE pin

frequency output

voltage output

Vaisala Fixed Site Observation System

to WMT700. Only applicable for retrofit

meters is needed. Junction Box contains terminal blocks that extend the

VAISALA ________________________________________________________________________ 33

User's Guide ______________________________________________________________________

Cable Tightening Tool

WMT700 is shipped with a cable tightening tool (237888SP). When a cable is inserted in the cable tightening tool, it is easier to grip and rotate the cable when connecting it to WMT700. After tightening, the cable tightening tool can be left in place.

1306-028

Figure 10 Cable Tightening Tool

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Chapter 3 _______________________________________________________ Functional Description

CHAPTER 3

FUNCTIONAL DESCRIPTION

This chapter describes the functionality of WMT700.

Operating Principle

WMT700 uses the Vaisala WINDCAP® ultrasonic sensor technology in wind measurement. The sensor has an onboard microcontroller that captures and processes data and communicates over serial interfaces.

The wind sensor has an array of three equally spaced ultrasonic transducers on a horizontal plane. Wind speed (WS) and wind direction (WD) are determined by measuring the time it takes the ultrasound to travel from each transducer to the other two.

The wind sensor measures the transit time (in both directions) along the three paths established by the array of transducers. This transit time depends on wind speed along the ultrasonic path. For zero wind speed, both the forward and reverse transit times are the same. With wind along the sound path, the upwind direction transit time increases and the downwind transit time decreases.

Figure 11 on page 36 shows how the time shift of the ultrasonic signals is measured and how tail wind and forward wind affect the measurement.

VAISALA ________________________________________________________________________ 35

User's Guide ______________________________________________________________________

The following numbers refer to Figure 11 above:

1 = Ultrasonic measurement with zero wind

2 = Impact of tail wind on ultrasonic measurement

3 = Impact of head wind on ultrasonic measurement

1005-007

Figure 11 Ultrasonic Measurement Principle

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Chapter 3 _______________________________________________________ Functional Description

)t/1(1/tL5.0V

rfW

−⋅⋅=

where

Vw = Wind velocity

L = Distance between two transducers

tf = Transit time in the forward direction

tr = Transit time in the reverse direction

where

1–6

Measurement paths 1 to 6 of WMT700

La, Lb, Lc

Distance between two transducers

The microcontroller calculates WS from the measured transit times using the following formula:

Measuring the six transit times allows Vw to be computed for each of the three ultrasonic paths. Using Vw values of two array paths is enough to compute WS and WD.

Figure 12 below shows the different paths of WMT700 and the vectors provided by the wind sensor:

VAISALA ________________________________________________________________________ 37

1104-066

Figure 12 Measurement Paths of WMT700

User's Guide ______________________________________________________________________

)A/1(1/A5.0V

21a

−⋅⋅=

)A/1(1/A5.0V

−⋅⋅=

)A/1(1/A 5.0V

−⋅⋅=

The vectors are calculated as follows:

The equation depends on the accurate distance of the measurement path (L). The computed wind speeds are independent of altitude, temperature, and humidity, which are canceled out when the transit times are measured in both directions, although the individual transit times depend on these parameters.

Coordinate Systems: Vector and Polar Calculations

The triangular geometry of the sensor is converted to orthogonal coordinates to achieve the x and y components. Then the sensor converts the wind vectors into polar coordinates.

The measurement results are reported as follows:

- WMT700 reports WS (x, y) as two scalar speeds, one parallel to the N-S direction (x) and the other (y) parallel to the W-E direction. The speed unit may be m/s, kt, mph, or km/h.

x = WS × cos (WD) y = WS × sin (WD)

- WMT700 reports polar wind speed as a scalar speed in selected units (m/s, kt, mph, km/h).

Polar wind direction is expressed in degrees (°). WMT700 indicates the direction that the wind comes from. North is represented as 0°, east as 90°, south as 180°, and west as 270°.

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Chapter 3 _______________________________________________________ Functional Description

Figure 13 below shows examples of wind speed and direction presentations.

Figure 13 Different Wind Speed and Direction

Presentations (Direction Offset Is 0)

0212-044

VAISALA________________________________________________________________________ 39

User's Guide ______________________________________________________________________

Wind Speed and Direction Averaging

WMT700 provides average values for wind speed and direction using either scalar or vector averaging. With both methods, the average is determined according to the user-configurable averaging time. The averaging time affects serial communication and analog output similarly.

You can also configure the gust averaging time for calculating wind extreme values. The default gust averaging interval is 3 seconds, as recommended by World Meteorological Organization (WMO).

If scalar averaging is selected, you can also enable wind direction coasting to ensure consistent direction measurement results at low wind speeds.

Scalar Averaging

When scalar averaging is selected, WMT700 calculates wind speed and direction averages by adding up each wind measurement from the averaging time and dividing the sum by the number of measurements. The time between each consecutive wind speed and wind direction measurement is 0.25 seconds.

Wind direction is a circular function with a discontinuity at the north, where 360 degrees is equal to zero degrees. For example:

359° + 5° = + 4° 0° - 5° = 355° WMT700 translates wind direction to a linear function to

determine the wind direction average. For instance: 359° + 5° is translated to 364°, which is then further converted to

+4° for output. 0° - 5° is translated to 355°. This ensures that the wind direction average stays representative

of the true situation even if individual samples occur on both sides of the zero direction.

If the data acquisition system requests data before the initial averaging time completes, the sensor returns the most recent complete measurement data.

40 ___________________________________________________________________ M211095EN-E

Chapter 3 _______________________________________________________ Functional Description

Figure 14 below shows an example of averaging wind direction when the measured wind values are 355° and 10°. The resulting average is 2.5°.

1005-024

Figure 14 Example of Wind Direction Averaging

Wind Direction Coasting

Accurate wind direction measurement requires that the wind speed is sufficient. If you enable wind direction coasting, WMT700 does not calculate wind direction when the wind speed drops below the selected wind direction coasting threshold. The last calculated direction output remains until the wind speed increases enough to reach the threshold and WMT700 returns to normal operation.

Vector Averaging

When vector averaging is selected, WMT700 calculates wind speed and direction averages by adding up each x velocity and y velocity measurement from the averaging time and then dividing the sum by the number of measurements. WMT700 converts the resultant average x velocity and average y velocity to polar direction and magnitude, which returns the wind direction average in degrees and wind speed average in the chosen units.

If the data acquisition system requests data before the initial averaging time completes, the sensor returns the most recent complete measurement data.

VAISALA ________________________________________________________________________ 41

User's Guide ______________________________________________________________________

Measurement Methods

WMT700 measures wind speed and direction either continuously or for the duration of the user-configurable averaging time. You can select the measurement mode over the serial interface.

Continuous Measurement

You can set WMT700 to measure wind data continuously until the sensor receives the STOP command.

The following data communication methods are available:

- Poll Mode: You can fetch the most recent data from WMT700 with the POLL command. You must specify the data message identification number in the command.

- Automatic Messaging Mode: If the automatic message interval is configured, WMT700 sends automatic data messages at selected intervals. The data message is user-configurable.

For information on response delay and timing, see section Serial Interface Timing on page 49.

Wind Measurement on Request

You can set WMT700 to measure wind speed and direction for a specified period of time. The duration of the measurement can range from 0.25 seconds to 60 minutes, depending on the configured averaging interval.

You can fetch the required data message from WMT700 in measurement mode with the polling command. You must specify the data message in the command.

For information on response delay and timing, see section Serial Interface Timing on page 49.

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Chapter 3 _______________________________________________________ Functional Description

Host System Connections and Interfaces

WMT700 always needs a host device for measurement data collection and presentation. The host device is usually an automatic weather station, but other host devices such as data loggers or personal computers can also be used.

WMT700 performs calculation, quality control, and data format procedures on the measurement data. The processed data is sent to weather stations using serial ports and/or analog output channels. The most commonly used communications interface is RS-485, but WMT700 has a flexible set of interfaces ranging from RS-232 to voltage and current mode analog signals.

You can set WMT700 to send measurement data as either analog output or data messages via a serial port, or you can use both outputs simultaneously. Operating and configuring commands are sent to WMT700 through the serial interface.

Operation and heating power is usually provided from one power supply. You can also use separate power supplies for the heating and operation to prevent the heating function from consuming the operation power. In a split-supply system there can be a separate backup power supply for the operating power supply.

Figure 15 on page 44 shows the main software components and external interfaces of WMT700.

VAISALA ________________________________________________________________________ 43

User's Guide ______________________________________________________________________

For examples of typical system Appendix

NOTE

Figure 15 External Interfaces of WMT700

environments for WMT700, see

B, Typical System Environments, on page 197.

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Chapter 3 _______________________________________________________ Functional Description

Serial Communication and Analog Output

The following functionality is preconfigured at the factory according to your order:

- Digital communication interface for COM2

- Digital communication profile for COM2

- Digital communication units

- Analog output signals for wind speed channel (AOUT1)

- Analog output signals for wind direction channel (AOUT2) For descriptions of serial commands and data messages, see

section Operation on page 107.

Serial Communication

In WMT700, there are two serial communication ports:

- COM1: Service port (RS485)

- COM2: Configurable digital communication interface Both ports support the same commands, protocols, operations,

and data messages. Any computer or data logger that has a serial port can be used to send commands to WMT700 and to receive measurement data.

Digital Communication Interface

COM1 is a fixed RS-485 communication interface intended to be used as a service port.

COM2 is a flexible digital communication interface that is preconfigured according to your order. The available options are:

- RS-232 (recommended up to 15 meter distance)

- RS-485 (recommended up to 1200 meter distance when used in point-to-point connection)

- RS-422 (recommended up to 1200 meter distance)

- SDI-12 (recommended up to 60 meter)

Note that the recommendations depend on communication speed and cable type. In optimized environments even longer distances can be considered.

VAISALA ________________________________________________________________________ 45

User's Guide ______________________________________________________________________

Regardless of the factory configuration, COM2 interface type can be changed by using terminal software. For more information, see section com2_interf in Appendix D, Configuration Parameters, on page 205.

For information on wiring, see section Wiring on page 77.

Profiles

The digital communication profile is used to preconfigure WMT700 according to your order at the factory. Depending on the preconfigured communication profile, the default settings of the following parameters may vary:

- Communication protocols

- Communication parameters See Appendix C, Default Settings for Different Communication

Profiles, on page 201 for the factory defaults for all communication profiles. The preconfigured communication profiles are:

- WMT700

- ROSA - MES12

- WS425 - ASCII

- WS425 - NMEA Extended (version 0183)

- WS425 - SDI-12 (version 1.3)

- WS425 – ASOS The WMT700 profile is recommended for normal operation. The

profile offers a wide range of predefined and user-configurable data message formats, and it is specifically developed for WMT700. For information on user-configurable data messages, see section Parameter Handling Commands on page 111. For information on predefined data messages, see section Data Messages on page 127.

The ROSA - MES12 profile is intended for connecting WMT700 to the Vaisala ROSA system.

The WS425 profiles can be used when upgrading from the WS425 wind sensor to WMT700.

For a list of the serial commands available for all communication profiles supported by WMT700, see Appendix A, Complete Command Set for WMT700, on page 195.

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Chapter 3 _______________________________________________________ Functional Description

Protocols

In addition to the protocols preconfigured under standard profiles, there are additional protocols available in WMT700. The protocol used is defined by related parameters. For more information, see Parameter Handling Commands on page 111. The full list of supported protocols is:

- WMT700

- WMT700 NMEA MWV

- SDI12

- WS425 - ASOS

- WS425 - ASCII

- WS425 - NMEA Standard

- WS425 - WAT11

- MES12

Measurement and Configuration Modes

The serial ports have the following operation modes:

- The configuration mode is used for configuring the WMT700 settings over a serial connection. The selected communication profile does not affect the available configuration commands.

- The measurement mode is used for operating WMT700. In the measurement mode, the available commands depend on the selected profile. The port that is in the measurement mode can receive polling commands and respond to them with data messages.

For a list of all serial commands supported by WMT700 in the configuration and measurement modes, see Appendix A, Complete Command Set for WMT700, on page 195.

VAISALA ________________________________________________________________________ 47

User's Guide ______________________________________________________________________

Figure 16 below shows the configuration and measurement modes of both serial ports provided by WMT700.

Figure 16 Configuration and Measurement Modes

After power-up, WMT700 is in the measurement mode. To change settings, use the OPEN command to enter the configuration mode. When you have changed the settings, use the CLOSE command to exit the configuration mode. WMT700 serial ports also exit the configuration mode automatically if they do not receive commands within 2 minutes.

For information on the OPEN and CLOSE commands, see section Entering and Exiting Configuration Mode on page 109.

1001-111

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Chapter 3 _______________________________________________________ Functional Description

Serial Interfac e Timing

Depending on the selected interface, the serial data interface timing is as follows:

- Interfaces RS-232, RS-485, RS-422: Figure 17 below shows timing when WMT700 is polled in the measurement mode.

1002-050

Figure 17 Timing for RS-232, RS-485, and RS-422

Interfaces

The response delay t2 is user-configurable. In the configuration mode, some commands have a longer response delay.

- SDI-12 interface: The timing is compliant with the SDI-12 standard. For the complete SDI-12 standard text, see the SDI-12 website at www.sdi-12.org.

VAISALA ________________________________________________________________________ 49

User's Guide ______________________________________________________________________

To emulate the WS425 analog output, choose voltage output, frequency output, and potentiometer. For more detailed instructions, see Operating

Analog Output

Analog outputs are either enabled or disabled, and the output settings are preconfigured at the factory according to your order. In analog output operation WMT700 takes measurements according to the configured averaging time and synthesizes the analog outputs of wind speed and wind direction with an update interval of 0.25 seconds.

You can change the analog output type and scaling of WMT700 according to your needs. You may also need to disable the analog output functionality to save power. For instructions, see Configuration Parameters on page 118.

WMT700 provides the following analog outputs:

- AOUT1 for wind speed data

- AOUT2 for wind direction data

NOTE

section

WMT700 in WS425 Analog Output Mode on page 139.

For information on wiring, see section Wiring on page 77.

Analog Output Types

Analog output for Wind Speed (AOUT1) can be configured as:

- Voltage output

- Current output

- Frequency output

- Push-pull output

- Pull-down output

- Pull-up output

For an illustration on frequency output, refer to Figure 18 on page

51. Analog output for Wind Direction (AOUT2) can be configured

as:

- Voltage output

- Current output

- Potentiometer output

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Figure 18 Frequency Output

1307-019

VAISALA________________________________________________________________________ 51

User's Guide ______________________________________________________________________

AOUT1 Selected Option

Scaling/Gain

Offset

Error Indication

Example

Voltage

0.1 V / m/s

0 V

10 V

0 V = 0 m/s

7.5 V = 75 m/s

Current 0 ... 20 mA

0.0002 A / m/s

0 A

0.022 A

0 mA = 0 m/s 15 mA = 75 m/s

Current

WMT701

0.00040000 A / m/s

0.004 A

0.002 A

4 mA = 0 m/s

20 mA = 40 m/s

WMT702

0.00024615 A / m/s

0.004 A

0.002 A

4 mA = 0 m/s 20 mA = 65 m/s

WMT703

0.00021333 A / m/s

0.004 A

0.002 A

4 mA = 0 m/s 20 mA = 75 m/s

Frequency Push-Pull

10 Hz / m/s

0 Hz

1000 Hz

0 Hz = 0 m/s 750 Hz = 75 m/s

WS425 - voltage

8 mV / mph (0.017895 V / m/s)

0 mph

2 V

0 mV = 0 mph

1.344 V=168 mph

WS425 - frequency

5 Hz / mph (11.185 Hz / m/s)

0 mph

1000 Hz

0 Hz = 0 mph 840 Hz =168 mph

Frequency Push (PNP)

10 Hz / m/s

0 Hz

1000 Hz

0 Hz = 0 m/s 750 Hz = 75 m/s

Frequency Pull (NPN)

10 Hz / m/s

0 Hz

1000 Hz

0 Hz = 0 m/s 750 Hz = 75 m/s

AOUT2 Selected Option

Scaling/Gain

Offset

Error Indication

Example

Voltage

0.02 V / °

0 V

10 V

0 V = 0°

7.2 V = 360°

Current 0 … 20 mA

0.00005 A / °

0 A

0.022 A

0 mA = 0° 18 mA = 360°

Current 4 … 20 mA

000044444 A / °

0.004 A

0.002 A

4 mA = 0° 20 mA = 360°

Potentiometer (WS425)

1/359*V

(0.0027855)

Vref (1)

0 V = 0° Vref = 359°

Analog Output Scaling

You can specify the transfer function between measured values and output analog values. You can select the analog output type as well as the gain and offset used in the transfer function. For information on the parameters, see Appendix D, Configuration Parameters, on page 205.

Table 19 below shows the factory default settings for the different analog output modes.

Table 18 Factory Settings for Analog Wind Speed Output

4 ... 20 mA

Table 19 Factory Default Settings for Analog Wind

Direction Output

ref /

For a different scaling, change the gain and offset settings, see Configuration Parameters on page 118.

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The scaling of the current output 4…20 mA depends on the sensor measurement range (WMT701, WMT702, or WMT703), while the 0…20 mA output has 0.2 mA / m/s scaling for all the measurement ranges.

Output Signal

Scaling/Units

Setting for Gain

Setting for Offset

Voltage

8 mV / mph 100 mV / m/s

0.017895

0.1 0 0

Current

0.2 mA / m/s

0.0002

Frequency

5 Hz / mph 10 Hz / m/s

11.185 10 0 WS425 - voltage

8 mV / mph

0.017895

WS425 - frequency

5 Hz / mph

11.185

Output Signal

Scaling/Units

Setting for Gain

Setting for Offset

Voltage

4 mV / ° 20 mV / °

0.004

0.02

0 0

Current

50 uA / degree

0.00005

Potentiometer

359° = Aout ref

0.0027855

where

o = Produced analog output (V, A, Hz, 100%)

s = Measured wind speed or direction (in m/s or °)

Selected gain value

y0 = Selected offset value

NOTE

Table 20 and Table 21 below list the most common settings for different units.

Table 20 Common Transfer Function Settings for

AOUT1 (WS)

Table 21 Common Transfer Function Settings for

AOUT2 (WD)

You can configure output scaling or transfer function settings in a variety of ways by changing the custom gain and offset. The basic measurement units are m/s and degrees. The physical output units are V, A, and Hz. For the potentiometer, an output of 1 means 100% of the Aout ref voltage.

The following formula illustrates the impact of gain and offset values on the produced output:

o = y0 + k×s

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User's Guide ______________________________________________________________________

Example 1

- Output mode: voltage

- Offset: 0.0

- Gain: 0.1 With the above settings, the analog output voltage range is from

0 V (0 m/s) to 7.5 V (75 m/s). When the measured wind speed is 10 m/s, the output voltage is 1.0 V. See the formula below:

Output = 0.0 + 10 × 0.1 = 1.0 V

Example 2

- Output mode: current

- Offset: 0.004

- Gain: 0.0002 With the above settings, the analog output current range is from

4 mA (0 m/s) to 19 mA (75 m/s). When the measured wind speed is 10 m/s, the output current is 6 mA. See the formula below:

Output = 0.004 + 10 × 0.0002 = 6.0 mA

Limitations for Output Signals

You can specify the minimum and maximum values for analog output with the configuration parameters. The output is fixed to the specified values, and the unit depends on the selected analog output mode.

Example

To limit analog output 1 in voltage mode to a range of 0.1 … 5 V, set the analog output minimum value to 0.1 and the analog output maximum value to 5. Enter the following commands:

S aout1minv,0.1 S aout1maxv,5

For more information on the parameters, see Appendix D, Configuration Parameters, on page 205.

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Missing Readings and Error Indication

If WMT700 is not able to measure the wind, it indicates a missing reading in the output. Most common reasons for measurement problems are foreign objects (such as ice, birds, or other foreign objects) on the line of measurement or sound reflections from nearby objects (such as wind tunnel walls).

The default error indication is an out-of-range signal, which is more than 10 V or 20 mA, but other error settings can also be configured.

Example

To set analog output 1 error indication in current mode to 2 mA, set the analog output error value to 0.002. Enter the following command:

S aout1err,0.002

For more information, see section Appendix D, Configuration Parameters, on page 205.

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If you are upgrading from WS mounting kit, see section 90

CHAPTER 4

INSTALLATION

This chapter contains information that is needed to install WMT700.

NOTE

Maritime Installations

In maritime installations according to IEC 60945, WMT700 belongs to the installation category C, which means that it is exposed to weather.

When making maritime installations, pay attention to the following:

- Do not install WMT700 in the vicinity of a magnetic compass. The product is magnetically inert, but the compass-safe distance is not measured.

- Do not place WMT700 directly in front of a radar.

- Do not install WMT700 next to a powerful RF-transmitter antenna.

425 to WMT700 and using a WS425

Mounting with WS425 Mounting Kit on page

VAISALA ________________________________________________________________________ 57

User's Guide ______________________________________________________________________

If ice or snow accumulates on WMT700 or the mast, it injury to persons below.

Selecting Installation Location

Finding a suitable site for WMT700 is important for getting representative ambient measurements. Select a site that represents the general area of interest. Follow the WMO Guide to Meteorological Instruments and Methods of Observation WMONo. 8, or other application-specific requirements set by various organizations, like the International Civil Aviation Organization (ICAO).

It is important to take into account the geography and surrounding area to achieve optimum performance. Trees, buildings, or other objects situated in the vicinity of WMT700 disturb free air flow and thus affect the accuracy of the measurement results.

Ideally, WMT700 should be higher than any other object within a horizontal radius of 300 m. In general, any object of height (h) does not remarkably disturb wind measurement at a minimum distance of 10 x h.

WARNING

When mounting WMT700 on top of a building, the recommended minimum height (h) for the mast is 1.5 × the height of the building (H). When the diagonal (W) is less than the height (H), the minimum height of the mast is 1.5 × W.

When there is a need to ensure free air flow with a cross arm installation, the distance (y) between WMT700 and the mast should be more than 20 × the diameter of the vertical mast (z). For more information, see Figure 19 on page 59 and follow application-specific installation guidelines.

When mounting two WMT700 wind sensors at the same height, make sure that there is a minimum of 10 meters of distance between the two devices, as shown in Figure 21 on page 61. If the difference in the height of the sensors is at least 0.5 meters, it is enough to have a minimum distance of 2 meters between the two devices to avoid possible acoustical interference between them.

can fall and cause

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Chapter 4 ________________________________________________________________ Installation

where

h = Height of a building or other high structure

r = Distance from a building or other high structure

Distance from the vertical mast

z = Diameter of the vertical mast

1001-016

Figure 19 Recommended Location in Open Area

VAISALA ________________________________________________________________________ 59

User's Guide ______________________________________________________________________

where

h = Recommended minimum height for the vertical mast

H = Height of the building

Diagonal of the building

To protect personnel (and the wind sensor), the tip at least one meter above WMT700. The rod must be properly grounded, compliant with all local applicable safety regulations. Do not install the wind sensor above the top of the lightning protection rod.

Do not activity in the area.

1005-001

Figure 20 Recommended Mast Length on Top of Building

WARNING

install a lightning rod with

WARNING

install WMT700 when there is a risk of thunderstorm or lightning

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Figure 21 Minimum Distance between Two WMT700

Devices Installed at Same Height

VAISALA ________________________________________________________________________ 61

User's Guide ______________________________________________________________________

When handlin touch the transducers with sharp objects. Any impact on the wind sensor array

Save the conta transpo

Installation Procedure

At the measurement site, you need to mount, align, and connect WMT700 to the power source and data acquisition system.

You can install the optional bird cage after the wind sensor is mounted and the transportation damper is removed from the sensor. For instructions, see section Installing Bird Cage on page

75.

CAUTION

g WMT700, do not rotate, pull, strike, bend, scrape, or

may damage the device.

1005-004

Figure 22 Sensor Handling

Unpacking

NOTE

rtation or shipping.

WMT700 is shipped in a cardboard custom container with plastic transportation dampers. One of the dampers protects the wind sensor body, while the other shields the array and the transducers, as shown in Figure 23 on page 63.

62 ___________________________________________________________________ M211095EN-E

iner and all the packaging materials for future

Chapter 4 ________________________________________________________________ Installation

When unpacking the wind sensor, remove the transportation damper that protects the sensor body. To avoid bending or twisting the array, do not remove the damper protecting the array until you have installed WMT700. Figure 23 below shows the damper protecting the array.

Retain all original packaging in case you have to return WMT700 to Vaisala Service Center for maintenance purposes. You can uninstall WMT700 by performing the steps of the mounting procedure in reverse order.

1005-025

Figure 23 WMT700 and Transportation Damper

Mounting

You can mount WMT700 either on a vertical pole mast or a horizontal cross arm. Each of the mounting options is further described in the following sections.

For information on the dimensions of WMT700, see Dimensions on page 193.

VAISALA ________________________________________________________________________ 63

User's Guide ______________________________________________________________________

Do not tighten the bolts too much at this stage because you still need to rotate the mo

The following numbers refer to Figure 24 above:

1=Cable tightening tool

2=Cable

Mounting on Vertical Pole Mast

When mounting WMT700 on a vertical pole mast, you can place it either on the side or on top of the mast. When selecting the mounting position, take into account the other equipment installed on the mast (for instance, lightning rods) and how the cable has been routed (outside or inside the mast).

Figure 26 on page 66 and Figure 27 on page 67 show the mounting procedure.

To mount WMT700 on a pole mast:

1. Attach the FIX70 mounting kit either to the side or on top of the vertical pole mast with U bolts (provided). Insert the U-bolts to the horizontal slots of the FIX70 mounting kit; see number 4 in Figure 26 on page 66 and Figure 27 on page 67.

2. Check that the mounting kit is not tilted to either side. Tighten the U bolts only slightly.

NOTE

unting kit to align WMT700 after the installation.

3. Run the cable through the FIX70 mounting kit.

4. Connect the cable to the wind sensor as follows. First, insert the cable in the cable tightening tool as shown in Figure 24 below. When you hear a click, the cable is properly inserted.

1306-029

Figure 24 Inserting Cable in Cable Tightening Tool

5. Press the ribbed part of the cable tightening tool lightly and attach the connector to WMT700. Direct the nib of the connector towards the slot in the WMT700 connector. Ensure that the connector is properly tightened before proceeding to the next step.

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You do not need to remove the cable tightening tool after tightening the connector;

NOTE

1306-140

Figure 25 Attaching Connector to WMT700

you can leave it in place.

6. Hold the wind sensor from the enclosure and slide the sensor into the mounting kit. Turn the sensor so that the mounting screw slides into the appropriate slot. Do not touch the array when handling WMT700.

To avoid misalignment, turn the sensor until the screw reaches the far end of the slot. When the screw is in the position indicated with number 3 in Figure 26 on page 66 or number 2 in Figure 27 on page 67, tighten the screw.

7. Remove the transportation damper protecting the array and store it for future use.

8. Align WMT700. For instructions, see section Alignment on page 74.

9. Connect the cable to the data acquisition system and power supply. For instructions, see section Wiring on page 77.

WMT700 is now ready for operation.

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User's Guide ______________________________________________________________________

When installing WMT700 to the side of a mast, make sure that the mounting kit is positioned at the top level of the mast. See below

The following numbers refer to Figure 26 above:

1 = FIX70 mounting kit

2 = WMT700 wind sensor

3 = Mounting screw in final position

4 = U-bolt and nut (M8DIN934-A4) in horizontal slot

NOTE

Figure 26

1006-077

Figure 26 WMT700 on Side of Pole Mast

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Chapter 4 ________________________________________________________________ Installation

The following numbers refer to Figure 27 above:

1 = WMT700 wind sensor

2 = Mounting screw in final position

3 = North arrow

4 = U-bolt and nut (M8DIN934-A4) in horizontal slot

5 = FIX70 mounting kit

1006-078

Figure 27 WMT700 on Top of Pole Mast

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User's Guide ______________________________________________________________________

Mounting on Horizontal Cr os s Arm

When mounting WMT700 on a cross arm, the wind sensor can be placed with the array facing up or down. Mounting WMT700 with the array facing down provides additional protection against the accumulation of snow and interference from birds. The adapter drains located at the bottom of WMT700 prevent water from accumulating inside the mounting adapter. If the wind sensor is installed with the array facing down, you must configure WMT700 accordingly. For configuration instructions, see section Configuration Parameters on page 118.

Figure 28 on page 69 and Figure 29 on page 70 show the mounting procedure.

To mount WMT700 on a cross arm:

1. Attach the FIX70 mounting kit to the cross arm with U bolts (provided). Insert the U bolts to the vertical slots of the FIX70 mounting kit. See number 3 in Figure 28 on page 69.

2. Check that the mounting kit is not tilted to either side. Tighten the U bolts firmly.

3. Run the cable through the FIX70 mounting kit.

4. Insert the cable in the cable tightening tool as shown in Figure 24 on page 64 to connect the cable to the wind sensor. Connect the cable to WMT700 and tighten by rotating the tightening tool clockwise by hand as shown in Figure 31 on page 72. Ensure that the connector is properly tightened before proceeding to the next step.

5. Hold the wind sensor from the enclosure and slide the sensor into the mounting kit. Turn the sensor so that the mounting screw slides into the slot. Do not touch the array when handling WMT700.

To avoid misalignment, turn the sensor until the screw reaches the far end of the slot. When the screw is in the position indicated with number 4 in Figure 28 on page 69, tighten the screw.

6. Remove the transportation damper protecting the array and store it for future use.

7. Align the horizontal cross arm. For instructions, see section Alignment on page 74.

8. Connect the cable to the data acquisition system and power supply. Connect the wires according to section Wiring on page 77.

WMT700 is now ready for operation.

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The following numbers refer to Figure 28 above:

1 = WMT700 wind sensor

2 = Mounting adapter

3 = FIX70 mounting kit

4 = Mounting screw in final position

5 = U-bolt and nut (M8DIN934-A4) in vertical slot

6 = North arrow

1006-079

Figure 28 WMT700 on Cross Arm with Array Facing Up

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User's Guide ______________________________________________________________________

The following numbers refer to Figure 29 above:

1 = FIX70 mounting kit

2 = WMT700 wind sensor

1006-080

Figure 29 WMT700 on Cross Arm with Array Facing

Down

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The following numbers refer to Figure 30 above:

1=WMT700

2=Cable tightening tool

3=Cable

The recommended way to tighten the connector is to use the cable tightening tool shipped with your WMT700. The ribbed part of the tool offers a better grip of the cable when tightening the connector. Insert the cable in the cable tightening tool as shown in Figure 30 below. You do not need to remove the cable tightening tool when the connector is tightened. For detailed instructions, see Figure 25 on page 65.

1306-033

Figure 30 Tightening Connector with Cable Tightening

Tool

VAISALA________________________________________________________________________ 71

User's Guide ______________________________________________________________________

The following number refers to Figure 31 above:

1=Tighten the connector by rotating the ribbed part of the connector by hand. DO NOT USE TOOLS

Verify that the connector is properly tightened to avoid water leakage and damage to warranty for WMT700.

You can tighten the connector without the cable tightening tool by rotating the ribbed part of the connector by hand. However, do not use tools when tightening the connector.

NOTE

1103-054

Figure 31 Tightening Connector without Cable Tightening

Tool

the sensor. If water leaks into the connector, this voids the

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Chapter 4 ________________________________________________________________ Installation

Make sure that you connect only de

Using a long cable between different units (sensors, transmitters, power supplies, and displays) can cause a lethal surge voltage, if a lightning strike occurs in the vicinity. Always apply proper grounding procedures and follow the requirements of the loc

Do not install WMT700 when there is a risk of thunderstorm or lightning activity in the area.

Checklist for Con nection Cables

Take the following issues into account when installing WMT700:

- How you route the cables depends on the mounting option selected for WMT700. When mounting to a mast, you can route the cable either outside or inside the mast depending on the mast type and other equipment (for instance, lightning rods) installed to the mast.

- Make sure that the cable is properly attached to the mast or cross arm before starting the installation. Otherwise, it may slip and fall down during the installation procedure.

- Make sure to attach the cable properly to avoid strain on the connector. Too much strain may cause the cable to fall off, damage the cable or connector, or make the cable or connector susceptible to water leakage. The recommended minimum bending radius for the cable is 70 mm.

WARNING

-energized wires.

al Electrical Code.

VAISALA ________________________________________________________________________ 73

User's Guide ______________________________________________________________________

Alignment

WMT700 is permanently marked with the letter N and a north arrow. You must align WMT700 in such a way that the arrow points to the north. Misaligning WMT700 causes a wind direction offset error in the measurement results, as shown in Figure 33 on page 75.

To align WMT700:

1. Determine if the array of WMT700 is correctly aligned with a compass or other similar method.

2. If the alignment is not correct, readjust the orientation as follows:

- When installing WMT700 on a vertical mast, rotate the

FIX70 mounting kit so that the north arrow and the north transducer point to the north in the measurement location. Do not remove WMT700 from the mounting kit during the alignment process. Tighten the bolts of the FIX70 mounting kit.

- When installing WMT700 on a horizontal cross arm,

rotate the arm so that the north arrow and the north transducer point to the north in the measurement location.

Figure 32 below and Figure 33 on page 75 show the correct alignment and the measurement error caused by the misalignment of WMT700.

0208-025

Figure 32 Correctly Aligned WMT700

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Chapter 4 ________________________________________________________________ Installation

where

Correct direction for true north

Wind direction offset error caused by the misalignment of WMT700

Make sure that you do not damage the array when installing the bird cage.

1001-018

Figure 33 Incorrectly Aligned WMT700 and Resulting

Offset Error

Alignment Tuning

If mechanical alignment of WMT700 cannot be done, you can correct the wind direction offset error by using an offset adjustment command. For instructions, see Appendix D, Configuration Parameters, on page 205.

Installing Bird Cage

To install the bird cage, you need to position the bird cage on top of the wind sensor and secure the kit with two straps. You can order the cage as an accessory from Vaisala; see Table 62 on page

192. The required straps are provided with the bird cage.

CAUTION

VAISALA ________________________________________________________________________ 75

User's Guide ______________________________________________________________________

The following numbers refer to Figure 34 above:

1 = Bird cage

2 = Bird cage straps

3 = Wind sensor

4 = Guide for attaching the straps

5 = Latch for securing the straps

To install the optional bird cage:

1. Unpack the bird cage and the bird cage straps.

2. Position the bird cage on top of the wind sensor and press the kit down until the three hooks are in contact with the transducer arms.

3. Run the lower strap through the three guides in the kit. Figure 34 below shows the correct position.

4. Lift the latch screw.

5. Insert the strap to the latch.

6. Press the latch screw down.

7. Tighten the screw by turning the screw clockwise with a screw driver or a socket. Do not over-tighten the screw.

8. Run the upper strap through the three guides in the kit.

9. Repeat the steps 4-7 for the other strap.

1104-086

Figure 34 Bird Cage and Bird Cage Straps

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Wire colors in the tables are not applicable to other cables.

If there are unused wires, make sure that they are unconnected and protected. Do not cut off

Wiring

The 17-pin M23 male connector is located at the bottom of WMT700. The connector is used for power supply, digital communications, and analog outputs. The signals related to digital communications are galvanically separated from the ground. The connector type is Hummel 7.106 series.

Cables

Ready-made cables are available for use with Vaisala MAWS and AWS520 systems. These cables have connectors on both ends. There is also a retrofit cable for Vaisala ROSA system in case analog output has been used with WS425.

Vaisala provides open-lead cables for connections to other host systems:

- Cable 2 m (227567SP)

- Cable 10 m (227568SP)

- RS485 Cable 2 m (228259SP)

- RS485 Cable 10 m (228260SP)

- ROSA Cable 10 m for Analog Outputs (231425SP)

- Junction Box with Cable 2 m (ASM210719SP) Cable 2 m and Cable 10 m carry through all signals from

WMT700 while the RS485 cables are designed for RS485 operation with a limited number of wires. The ROSA Cable is intended for replacing WS425 with WMT700 in the Vaisala ROSA system if WS425 is connected using analog outputs. The Junction Box is designed mainly for maritime RS422 operation but it can be used whenever a connection longer than 10 meters is needed as an entry point for an extension cable.

Table 22 on page 78 shows how to connect Cable 2 m (227567SP) and Cable 10 m (227568SP). Same color coding is also used in Junction Box wiring.

Table 24 on page 80 shows how to connect RS485 Cable 2 m (228259SP) and RS485 Cable 10 m (228260SP).

NOTE

any wires.

VAISALA________________________________________________________________________ 77

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Power Supply

Wire Colors

Operating Power Supply

White

Operating Power Supply Ground

Gray-Pink

Heater Power Supply

Gray

Heater Power Supply

Pink

Heater Power Supply Ground

Blue

Heater Power Supply Ground

Red

Enclosure Ground

Shield

Analog Outputs

Analog Output AOUT2, Wind Direction

Brown

Analog Output AOUT1, Wind Speed

White-Green

Reference Input for AOUT2 (simulated potentiometer)

White-Gray

Analog Output Ground

Red-Blue

COM port

RS-232

RS-422

RS-485

SDI-12

RS232Rx

Rx–

Green

RS232Tx

Tx–

Data

Yellow

4 - Tx+

Tx+ - Brown-Green

Rx+

White-Yellow

COM1 and COM2 Communication Ports Ground

Violet

COM1 Port)

RS-485 –

Black

RS-485 +

Brown-Yellow

Cable 2 m, Cable 10 m, Cable 15 m, and Cable 26 m

Table 22 below shows how to connect Cable 2 m (227567SP), Cable 10 m (227568SP), Cable 15 m (237890SP), and Cable 26 m (237889SP).

Table 22 Connecting Cable 2 m (227567SP),

Cable 10 m (227568SP), Cable 15 m (237890SP), and Cable 26 m (237889SP)

COM2

(Service

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WMT700 Signals

Wire Colors

RS485 Signals

RxB

Green

TxB

Yellow

TxA

Brown-Green

14 + RxA

White-Yellow

To avoid confusion, the RS485 and RS422 signals of named as follows:

According to the EIA

The A/B naming used by some manufacturers is in conflict with the

standard. To ensure proper operation, verify the polarity of the signals when using the device on the bus with signals named as A/B. Opposite polarity causes data inversion on the bus, but it does not damage the device.

RS485 for COM2 with Cable 2 m and 10 m

In RS485 mode, the same signals as in RS422 mode are available at the end of Cable 2 m and Cable 10 m. Make two-wire loopbacks at the end of the cable, as shown in Table 23 and Figure 35 below.

Table 23 COM2 RS485 Wiring

1009-016

Figure 35 COM2 RS485 Wiring

NOTE

Inverting: – Non-inverting: +

Inverting: – <=> A Non-inverting: + <=> B

WMT700 are

-485 standard, the lines are named as follows:

VAISALA ________________________________________________________________________ 79

User's Guide ______________________________________________________________________

Power Supply

Wire Colors

Operating Power Supply

White

Operating Power Supply Ground

Gray-Pink

Heater Power Supply

Gray, Green, Pink

5, 6

Heater Power Supply Ground

Blue, Black, Red, Yellow

7, 8

Enclosure Ground

Shield

COM2

RS485 -

Brown

3,4

RS485 +

Red-Blue

14, 15

Communications Ground

Violet

RS485 Cable 2 m and RS485 Cable 10 m

RS485 Cable 2 m and RS485 Cable 10 m are designed for the standard connection: operating power, heater power, and RS485. The two-wire RS485 loopback connections, as shown in Table 24 below, are preconnected inside the cable.

Table 24 Connecting RS485 Cable 2 m (228259SP) and

RS485 Cable 10 m (228260SP)

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Description

RS-232

RS-422

RS-485

SDI-12

Operating Power Supply

Analog output AOUT2, Wind Direction

RS232Rx

Rx–

- 4 RS232Tx

Tx–

Data

Heater Power Supply

Heater Power Supply Ground

COM1 (Service Port)

RS-485, B

COM1 and COM2 Communication Ports Ground

Operating Power Supply Ground

Analog Output Ground

Analog Output AOUT1, Wind Speed

Tx+

Tx+ - 15 - Rx+

Rx+

COM1 (Service port)

RS-485+ 17

Reference Input for AOUT2 (simulated potentiometer)

Shield

Enclosure Ground

Connector Signals

Figure 36 and Table 25 below describe the pin-out of the 17-pin M23 connector as seen from the outside. The serial output type of COM2 depends on the sensor configuration. Analog outputs are always available from the connector.

1103-061

Figure 36 Pins for 17-Pin M23 Connector Table 25 Pin-Out for 17-Pin M23 Connector

COM2

VAISALA ________________________________________________________________________ 81

User's Guide ______________________________________________________________________

Ensure that the supply output power capacity is high enough especially when transducers

Also, note that there are individual connections for applying the heating voltage.

Heating

WMT700 can include a heating functionality that ensures proper operation in cold environmental conditions or in cases where snow and ice build-up is possible.

In addition to the standard non-heated version, WMT700 can be preconfigured at the factory according to your order:

- Heating for the transducers only

- Heating for both transducers and array arms

- Heating for body, transducers, and array arms

NOTE

, array arms, and sensor body are equipped with heaters.

Heated Transducer s

The heating functionality has a thermostatic control with temperature sensors in each transducer. The control function keeps the transducer temperature above 0 °C and adds heating power when necessary. Therefore, heating is only activated when there is a risk of ice build-ups. If a sensor is blocked, WMT700 increases the heating power to melt the ice and returns to lower power after a period of time.

You cannot change the heating parameters, but you can enable or disable the heating functionality with configuration parameters. When heating voltage falls below 18 VDC, an alarm is raised. Heating is automatically disabled if heating voltage falls below 15 VDC.

Regardless of heating voltage, the maximum heating power is limited to 40 W and the average heating power is limited to 30 W. The maximum power control is achieved by automatically sequencing the transducer heaters depending on a heating voltage. At low heating voltages, all the transducers are heated simultaneously. At mid-range, two of the transducers are heated. At high voltage end, a single transducer is heated at a time. A PWM (Pulse Width Modulation) scheme is used to control the average heating power.

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Some WMT700 product versions provide heating for transducers and/or array arms. To avoid injury, do not touch the h sensor when the heating is enabled.

Heated Transducer s and Arms

In addition to heated transducers, the array arms can also be heated, which prevents ice build-up on the arms.

The functional principle is the same as with the heated transducers only, but the maximum heating power is limited to 200 W and the average heating power is limited to 150 W.

WARNING

eated parts of the wind

Heated Body, Transducers, and Arms

The fully heated version of WMT700 is suitable for harsh weather conditions. It provides heating for the sensor body, transducers, and arms.

The functional principle is the same with the heated transducers and arms. Body heating is controlled independently of transducer and arm heating. The maximum heating power for the fully heated WMT700 is 350 W and the average heating power is 250 W in harsh weather conditions. The inner temperature of the unit is measured continuously. If the inner temperature starts rising, body heating power automatically reduces to retain the optimum inner temperature of WMT700.

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User's Guide ______________________________________________________________________

In a potential differences between the supplies. Connect the negative terminals

Used Heating Option

Operating Power Supply

None

9 … 36 VDC 2 W

Transducers

12 … 36 VDC 2 W

Transducers and arms

14 … 36 VDC 2 W

Transducers, arms and body

16 … 36 VDC 2 W

Powering

WMT700 has separate power supply inputs for operating and heating power. The inputs are usually connected to the same 24 VDC power supply unit, but special applications such as battery operation or battery back-up may require separate supplies.

The operating power has one supply terminal and one ground terminal, while the heating power has two supply terminals and two ground terminals allowing a higher supply current. All supply ground terminals are internally connected to each other.

NOTE

system setup with two separate power supplies, avoid ground

together if necessary.

Operating Power

WMT700 can use any 9 ... 36 V (nominal voltage 24 V) minimum 2 W DC power supply that meets applicable safety regulations. Connect heating supply wires to the ground in case heating is not used. The typical current and power consumptions vs. operating voltage are shown in Figure 38 and Figure 39 on page 86. Note that the selected heating option affects the needed operation voltage when separate powering for operation and heating is used.

Table 26 Operating Power Supply Voltage Requirements

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In maritime environments, the normal input voltage ranges are: operating voltage 10 24 IEC

Figure 37 below shows the wiring of non-heated WMT700 versions.

1301-017

Figure 37 Wiring of Non-heated WMT700 Versions

NOTE

… 30 VDC (-10% … +30%) and heating voltage

… 30 VDC (-10% … +30%), as defined in the maritime standard

60945.

For low-power operation using the SLEEP feature, see section SLEEP — Enter Low-Power Mode on page 137.

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User's Guide ______________________________________________________________________

Figure 38 and Figure 39 below illustrate WMT700 Operating Supply Current Consumption and Operating Supply Power Consumption.

1104-054

Figure 38 Operating Supply Current Consumption

1104-055

Figure 39 Operating Supply Power Consumption

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In maritime environments, the normal inpu voltage 10 24 IEC

Heating Option

Heating Voltage

Required Heating Power Supply

None

- - Transducers

24 … 36 VDC

40 W

Transducers and arms

24 … 36 VDC

200 W

Transducers, arms and body

24 VDC

350 W (2 m cable)

The minimum operation voltage for a fully heated WMT700 (transducers, unit is used for operation.

Wire Type/ Cable Length

2 m

WMT70CABLE1*

10 m

20 m

30 m

40 m

0.5 mm2/AWG20

24V 400 W

28 V 400 W

- - -

1 mm2/AWG17

- - 28V 400 W

30 V 400 W

32 V 400 W **

1.5 mm2/AWG15

- - - - 30 V 400 W

Heating Pow er

Table 27 below lists the minimum power supply requirements of each WMT700 heating option.

NOTE

t voltage ranges are: operating

… 30 VDC (-10% … +30%) and heating voltage

… 30 VDC (-10% … +30%), as defined in the maritime standard

60945.

Table 27 Heating Power Supply Requirements

Power and Cable Recommendations for Fully Heated WMT700

Table 28 below shows cable and power recommendations. If a longer than a 10 meter cable is needed, it is recommended to use Junction Box with Cable (WMT70CABLE12) for extending the cable length.

NOTE

arms, and body heated) is 16 V, if a separate power supply

Table 28 Heating Power and Extension Cable

WMT70CABLE2*

* Vaisala standard connection cable. ** Not for maritime use.

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User's Guide ______________________________________________________________________

There are two terminals connected in parallel for both positive and negative rails of the heating voltage for the maximum current capacity. In case the connection cable has parallel supply wires, they all have to be connected to ensure current capacity. Leaving one terminal unconnected or connecting it to the ground may cause a WMT700 malfunction or a short circuit in

Figure 40 and Figure 41 below illustrate the wiring of heated WMT700 instruments.

1301-018

Figure 40 Wiring of Heated WMT700 Versions, Part 1

Note that when using separate power supplies for operating and heating, the minus (-) terminals of the power supplies are connected together by an additional wire. Use a minimum

0.75 mm2 wire for connecting the (-) terminals together.

1307-003

Figure 41 Wiring of Heated WMT700 Versions, Part 2

CAUTION

the power supply.

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Always use cables that meet the minimum dimension requirements. Long cables with thin wires cause power losses in the cable and significantly decrease the heating capabilities of WMT700.

Loop resistance of 0.15 Ω results in

voltage with 200 W heating. You should note this to get proper heating capability. For example, the loop resistance of a 10 m cable (227568SP)

is 0.7 Ω resulting in an approximately 4 V drop. It is recommended that

you use

To protect personnel (and the wind sensor), install a lightning rod with the tip at least one meter above WMT700. The rod must be properly grounded, compliant with all local applicable safety regulations. Do not install the

Do not install WMT700 when there is a risk of thunderstorm or lightning activity in the area.

NOTE

approximately 1 V drop in heating

at least a 28 V supply for the maximum heating capability.

Upgrading from WS425 to WMT700

When upgrading to WMT700, you have the following installation options:

- Basic installation procedure, which consists of mounting WMT700 with the FIX70 mounting kit and the WMT700 mounting adapter.

WARNING

To upgrade to WMT700 according to this procedure, uninstall the WS425 wind sensor and mounting kit and follow the installation instructions in section Installation on page 57.

- Retrofit installation procedure, which consists of mounting WMT700 with a WS425 mounting kit and the WMT700 mounting adapter for FIX30/60.

At the measurement site, you need to mount WMT700 and connect it to the power source and data acquisition system.

After upgrading to WMT700, it is possible to install the optional bird prevention kit available for the wind sensor. For more information, see section Bird Cage on page 31.

wind sensor above the top of the lightning protection rod.

WARNING

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User's Guide ______________________________________________________________________

When handling WMT700, do not rotate, pull, strike, bend, scrape, or touch the array damages the device.

Save the container and all the packaging materials for future transporting or shipping.

If you remove the mounting the mounting procedure. To facilitate the aligning process, mark both the wind sensor and the mounting kit with a marker pen before removing the mounting kit.

You can use the mark as a rough reference when star process described in section

CAUTION

transducers with sharp objects. Any impact on the wind sensor

NOTE

For instructions on unpacking, see section Unpacking on page 62.

Mounting with WS425 Mounting Kit

You can mount WMT700 either on a vertical pole mast or a horizontal cross arm using the WS425 mounting kit. The procedure for both mounting options is identical. Typically you can upgrade from WS425 to WMT700 without removing the mounting kit.

NOTE

kit, you need to align the wind sensor after

ting the aligning

Alignment on page 74.

When mounting WMT700 to a cross arm, the wind sensor can be placed with the array facing up or down. If the wind sensor is installed with the array facing down, you must configure WMT700 accordingly. For configuration instructions, see Configuration on page 110.

Figure 42 on page 91 shows the mounting procedure to a vertical pole mast. Figure 43 on page 92 and Figure 44 on page 93 show the mounting procedure to a horizontal cross arm.

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The following numbers refer to Figure 42 above:

1 = WMT700

2 = Mounting adapter for FIX30/60

3 = WS425 mounting kit

4 = Mounting screw

1104-081

Figure 42 Retrofit Installation to Pole Mast

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User's Guide ______________________________________________________________________

The following numbers refer to Figure 43 above:

1 = WMT700

2 = Mounting adapter for FIX30/60

3 = Mounting screw

4 = WS425 cross arm

1104-082

Figure 43 Retrofit Installation to Cross Arm with Array

Facing Up

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The following numbers refer to Figure 44 above:

1 = Mounting adapter for FIX30/60

2 = WS425 cross arm

3 = WMT700

1104-083

Figure 44 Retrofit Installation to Cross Arm with Array

VAISALA ________________________________________________________________________ 93

Facing Down

User's Guide ______________________________________________________________________

Before You Start

Before you start the retrofit installation procedure, make sure that you have the correct items:

- Correct mounting kit (already attached to the mast) for a retrofit installation. Figure 45 below shows the available options: FIX30 and WS425FIX60 mounting kits.

1006-054

Figure 45 FIX30, WS425FIX60-RST, and WS425FIX60-

POM

For information on the FIX70 mounting kit, see Figure 3 on page

20.

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If you have FIX30, do not use the adapter cables but order the appropriate WMT700 cable. Th mast.

Description

Spare Part Item

FIX70

FIX30

WS425FIX60

Out

WMT700 cables with open leads

227567SP

x x x x x 227568SP

x x x x x 237890SP

x x x x x 237889SP

x x x x x 231425SP

x x x x x 228259SP

x x x x x 228260SP

x x x x

WMT700 cables with connectors

227565SP

x x x x x x 229807SP

x x x x x 227566SP

x x x x

- Correct mounting adapter for your installation; FIX30,

WS425FIX60-POM, or WS425FIX60-POM, see Figure 46 below. The diameter of the mounting adapter for the adapters is 61 mm. Change the mounting adapter if necessary. If you are not sure that you have the correct mounting adapter, contact Vaisala.

NOTE

one end (Standard 2 m/10 m/15 m/26 m, RS485 2 m/10 m, ROSA analog 10 m)

Figure 46 Mounting Adapter for FIX30, WS425FIX60

(Left), and Mounting Adapter for FIX70 (Right)

- Correct cables for the mounting kit and analog output/serial

communication. Table 29 below lists the available cables for a retrofit installation. The In/Out stands for the possibility to route the cable either inside or outside of the mast.

e adapter cable will not fit inside the

Table 29 Mounting Kits and Cable Codes

on both ends (MAWS, AWS520):

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User's Guide ______________________________________________________________________

Mounting Procedure

To upgrade from WS425 to WMT700:

1. Uninstall WS425.

2. If you are using a WMT700 cable, run the cable through the

WS425 mounting kit. Connect the cable to the WMT700 wind sensor.

If you are using a WS425 cable, ensure the pre-installed Oring seal sits properly in the plastic male connector (between the existing WS425 cable and the adapter cable). Connect the WS425 cable to the WS425 adapter cable (see Figure 47 below). Run the adapter cable through the WS425 mounting kit. Connect the cable to the WMT700 wind sensor.

1103-012

Figure 47 WS425 Adapter Cable

3. Tighten the connector by rotating the connector by hand

clockwise; see Figure 31 on page 72. Ensure that the connector is properly tightened before

proceeding to the next step. If you are unable to tighten the connector, loosen the mounting adapter fixing screws, remove the mounting adapter, and connect the cable. After that, reattach the mounting adapter.

4. Attach the WMT700 sensor body to the WS425 mounting

kit and tighten the bolt.

5. Remove the transportation damper protecting the array and

store it for future use.

6. Connect the cable to the data acquisition system and power

supply. Connect the wires according to section Wiring on page 99.

WMT700 is now ready for operation.

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Verify that the connector is properly tightened to avoid water leakage and damage to the sens warranty for WMT700.

Tightening Connector

When connecting the cable to your WMT700, it is recommended that you tighten the connector with the cable tightening tool shipped with your WMT700. The ribbed part of the tool offers a better grip of the cable when tightening the connector. Insert the cable in the cable tightening tool as shown in Figure 30 on page 71 and Figure 25 on page 65. You do not need to remove the cable tightening tool when the connector is tightened.

You can tighten the connector without the cable tightening tool by rotating the ribbed part of the connector by hand as shown in Figure 31 on page 72. However, do not use tools when tightening the connector.

NOTE

or. If water leaks into the connector, this voids the

VAISALA ________________________________________________________________________ 97

User's Guide ______________________________________________________________________

Make sure that you connect only de

Do not install WMT700 when there is a risk of thunderstorm or lightning activity in the area.

Checklist for Connection Cables

Take the following issues into account when installing WMT700:

- How to route the cables depends on the mounting option selected for WMT700. When mounting to a mast, the cable can be routed either outside or inside the mast depending on the mast type and other equipment (for instance, lightning rods) installed to the mast.

- Make sure that the cable is properly attached to the mast or cross arm before starting the installation. Otherwise, it may slip and fall down during the installation procedure.

- Make sure to attach the cable properly to avoid strain on the connector. Too much strain may cause the cable to fall off, damage the cable or connector, or make the cable or connector susceptible to leakage. The recommended minimum bending radius for the cable is 70 mm.

WARNING

-energized wires.

al Electrical Code.

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Vaisala WMT700 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

GENERAL INFORM ATION

About This Manual

Contents of This Manual

Version Information

Related Manuals

Documentation Conventions

Safety

Recycling

Regulatory Compliances

CHAPTER 2

PRODUCT OVERVIE W

Introduction to WMT700

Measurement Range

Temperature Range

Ordering Options

Heating

Digital Communicati on Interface

Digital Communicati on Pr of ile

Digital Communicati on Units

Analog Output Signal for Wi nd S peed Channel

Analog Output Signal for Wi nd Direction Channel

Connection Cables

Accessories

Mounting Adapters

Manual

Example of WMT703 Configuration

Accessories

Bird Cage

WM Verifier

Cables

CHAPTER 3

FUNCTIONAL DESCRIPTION

Operating Principle

Coordinate Systems: Vector and Polar Calculations

Wind Speed and Direction Averaging

Scalar Averaging

Wind Direction Coasting

Vector Averaging

Measurement Methods

Continuous Measurement

Wind Measurement on Request

Host System Connections and Interfaces

Serial Communication and Analog Output

Serial Communication

Digital Communication Interface

Profiles

Protocols

Measurement and Configuration Modes

Serial Interfac e Timing

Analog Output

Analog Output Types

Analog Output Scaling

Limitations for Output Signals

Missing Readings and Error Indication

CHAPTER 4

INSTALLATION

Maritime Installations

Selecting Installation Location

Installation Procedure

Unpacking

Mounting

Mounting on Horizontal Cr os s Arm

Checklist for Con nection Cables

Alignment

Alignment Tuning

Installing Bird Cage

Cable 2 m, Cable 10 m, Cable 15 m, and Cable 26 m

RS485 for COM2 with Cable 2 m and 10 m

RS485 Cable 2 m and RS485 Cable 10 m

Connector Signals

Heating

Heated Transducer s

Heated Transducer s and Arms

Heated Body, Transducers, and Arms

Powering