Vaisala WINDCAP WMT700 Series - Figure 12 Ultrasonic Measurement Principle

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Figure 12 Ultrasonic Measurement Principle

1 Ultrasonic measurement with zero wind

2 Impact of tail wind on ultrasonic measurement

3 Impact of head wind on ultrasonic measurement

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

formula:

WMT700 User Guide M211095EN-H

Main Page

Table of Contents3
About this Document11
Version Information11
Documentation Conventions11
Trademarks12
Product Overview13
Introduction to WMT70013
WMT700 Wind Sensor14
Figure 2 WMT700 from below15
Figure 3 FIX70 Mounting Kit16
Figure 4 WS425FIX60-POM17
Figure 5 WMT700FIX60-POM17
Figure 6 WS425FIX60-RST and WS425FIX6018
Figure 7 WMT700FIX60-RST18
Regulatory Compliances19
Table 2 Environmental Tests19
Table 3 Electromagnetic Compatibility Tests19
Ordering Options20
Table 4 Ordering Options20
Measurement Range21
Temperature Range21
Table 5 Measurement Ranges of Different Sensor Types21
Table 6 Temperature Range21
Heating22
Digital Communication Interface22
Table 7 Heating22
Table 8 Digital Communication Interface22
Digital Communication Profile23
Digital Communication Units23
Analog Output Signal for Wind Speed Channel23
Table 9 Digital Communication Profile23
Table 10 Digital Communication Units23
Table 11 Output Configuration24
Analog Output Signal for Wind Direction Channel25
Table 12 Analog Output Signal for Wind Direction25
Connection Cables26
Mounting Adapters26
Table 13 Connection Cables26
Accessories27
Manual27
Table 14 Mounting Adapters27
Table 15 Accessories27
Table 16 Manual27
Example of WMT703 Configuration28
Accessories28
Figure 8 Example of WMT703 Configuration28
Bird Cage29
Zero Wind Verifier29
Figure 9 Bird Cage29
Figure 10 Zero Wind Verifier29
Cables30
Table 17 Cables30
Cable Tightening Tool31
Figure 11 Cable Tightening Tool31
Functional Description33
Operating Principle33
Figure 12 Ultrasonic Measurement Principle34
Figure 13 Measurement Paths of WMT70035
Coordinate Systems: Vector and Polar Calculations36
Wind Speed and Direction Averaging37
Figure 14 Wind Speed and Direction Presentations (Direction Offset Is 0)37
Scalar Averaging38
Wind Direction Coasting39
Vector Averaging39
Figure 15 Example of Wind Direction Averaging39
Measurement Methods40
Continuous Measurement40
Wind Measurement on Request40
Host System Connections and Interfaces40
Serial Communication and Analog Output41
Figure 16 WMT700 External Interfaces41
Serial Communication42
Communication Interface42
Profiles42
Protocols43
Measurement and Configuration Modes43
Serial Interface Timing44
Figure 17 Configuration and Measurement Modes44
Analog Output45
Analog Output Types45
Figure 18 Timing for RS-232, RS-485, and RS-422 Interfaces45
Figure 19 Frequency Output46
Analog Output Scaling47
Table 18 Factory Settings for Analog Wind Speed Output47
Table 19 Factory Default Settings for Analog Wind Direction Output47
Table 20 Common Transfer Function Settings for Aout1 (WS)48
Table 21 Common Transfer Function Settings for Aout2 (WD)48
Limitations for Output Signals49
Missing Readings and Error Indication50
Heating50
Heated Transducers51
Heated Transducers and Arms51
Heated Body, Transducers, and Arms52
Installation53
Installing WMT70053
Maritime Installations53
Placing WMT70053
Unpacking and Handling WMT70054
Figure 20 Removing WMT700 Bottom Transportation Damper55
Figure 21 Handling WMT70055
Connecting WMT700 Cable56
Mounting WMT700 on Vertical Pole Mast59
Figure 22 Mounting WMT700 on Side of Mast60
Figure 23 Mounting WMT700 on Top of Mast60
Mounting WMT700 on Sensor Support Arm or Cross Arm Using WMT70FIX62
Aligning WMT70065
Figure 24 WMT700 North Arrow66
Configuring Wind Direction Offset67
Analog Output Parameter for WMT700 in Tunnels and Cranes67
Table 22 Aout_Map Values67
Table 23 Wind y and X Components at Different Wind Direction Angles68
Figure 25 WMT700 in Tunnels69
Figure 26 Ma Output in Tunnels69
Figure 27 Analog Output for Wind Speed and Wind Speed Alarm70
Figure 28 Ma Output in Cranes71
Installing Bird Cage72
Installing Bird Net73
Figure 29 WMT700 Bird Cage and Bird Cage Straps73
Wiring74
Cables74
Cable 2 M, Cable 10 M, Cable 15 M, and Cable 26 M75
Table 24 Connecting Cable 2 M, Cable 10 M, Cable 15 M, and Cable 26 M75
For COM2 with Cable 2 M and 10 M76
Figure 30 COM2 RS-485 Wiring76
Table 25 COM2 RS-485 Wiring76
Cable 2 M and RS-485 Cable 10 M77
Connector Signals77
Figure 31 Pins for 17-Pin M23 Connector77
Table 26 Connecting RS-485 Cable 2 M (228259SP) and RS-485 Cable 10 M (228260SP)77
Powering78
Table 27 Pin-Out for 17-Pin M23 Connector78
Operating Power79
Figure 32 Wiring of Non-Heated WMT700 Versions79
Table 28 Operating Power Supply Voltage Requirements79
Figure 33 Operating Supply Current Consumption80
Heating Power81
Figure 34 Operating Supply Power Consumption81
Table 29 Heating Power Supply Requirements81
Figure 35 Wiring of Heated WMT700 Versions, Part 182
Table 30 Heating Power and Extension Cable82
Figure 36 Wiring of Heated WMT700 Versions, Part 283
Upgrade from WS425 to WMT70084
Table 31 Sensor Power of Different Heating Options84
Table 32 Heabmaxpower Parameter Values84
Mounting with WS425 Mounting Kit85
Figure 37 Retrofit Installation to Pole Mast86
Figure 38 Retrofit Installation to Cross Arm with Array Facing up87
Upgrade Prerequisites88
Figure 39 Retrofit Installation to Cross Arm with Array Facing down88
Figure 40 FIX30, WS425FIX60-RST, and WS425FIX60-POM89
Figure 41 Mounting Adapter for FIX30, WS425FIX60 (Left), and Mounting Adapter for FIX70 (Right)89
Upgrading from WS425 to WMT70090
Table 33 Mounting Kits and Cable Codes90
Mounting WMT700 with ASOS Mounting Adapter92
Figure 42 Installing with ASOS Mounting Adapter92
Connection Cable Prerequisites94
Wiring in Retrofit Installations95
Table 34 ROSA Cable 10 M (231425SP)96
Table 35 Pin-Outs for WS425 Serial Adapter Cable (227569SP)97
Table 36 Pin-Outs for WS425 Analog Frequency Output Adapter Cable98
Table 37 Pin-Outs for WS425 Analog Voltage Output Adapter Cable98
Powering in Retrofit Installations99
Table 38 WMT700 and WS425 Analog Output Connections99
Operation101
Communicating with Terminal Software101
Entering and Exiting Configuration Mode102
OPEN - Entering Configuration Mode102
CLOSE - Exiting Configuration Mode103
Configuration103
Parameter Handling Commands104
Table 39 List of Configuration Mode Commands104
S - Set Parameter105
G - Get Parameter106
BAUD - Display or Set Port Settings107
Wind Measurement Control Commands108
MEAS - Single Wind Measurement108
START - Start Continuous Measurement108
STOP - Stop Wind Measurement108
Diagnostics and Support Commands108
ERRORS - Get Error Codes and Counts108
CLEARERR - Reset Error Codes and Counts109
POLL - Get Message109
RESET - Reset CPU110
Information Commands110
Display Command Set110
H - Display Help and Messages110
VERSION - Show Firmware Version110
WIND_GET - Get Calibration Data111
Configuration Parameters111
Configurable Data Messages111
Configuring Data Messages112
Table 40 Wind Measurement Items for Data Messages112
Table 41 Control Character113
Table 42 Monitoring Items for Data Messages113
Status Flags115
Table 43 Status115
Loading Settings from Configuration Files117
Operating WMT700119
Operating WMT700 with Terminal Program120
Data Messages121
Table 44 Data Messages121
Missing Readings126
Error Indication126
Measurement Mode Commands127
WMT700 Profile Commands127
Table 45 Measurement Mode Commands128
ROSA - MES12 Profile Commands130
Operating WMT700 in WS425 Analog Output Mode130
Analog Output Settings130
Wind Speed Output131
Frequency131
Table 46 Required Parameters for WS425 Analog Output Operation Mode131
Voltage132
Figure 43 Wind Speed Frequency Analog Output with WS425 Cable and Adapter Cable for Analog Frequency Output132
Wind Direction Output133
Figure 44 Wind Speed Voltage Analog Output with WS425 Cable and Adapter Cable for Analog Voltage Output133
Limitations for Output Signals134
Missing Readings and Error Indication134
Figure 45 Wind Direction Voltage Output with WS425 Cable and Adapter Cable134
Operating WMT700 with WS425 and SDI-12 Profiles135
Communication Profiles135
Changing Communication Profile135
Operating WMT700 with Terminal Program136
Entering Configuration Mode137
F/G ASOS Profile137
Table 47 Configurable Parameters for WS425 F/G ASOS Profile137
WS425 F/G ASOS Commands138
Table 48 WS425 F/G ASOS Commands138
WS425 F/G ASOS Data Message142
Table 49 WS425 F/G ASOS Data Message143
WS425 A/B NMEA Standard Profile144
Table 50 Configurable Parameters for WS425 A/B NMEA Standard Profile144
WS425 A/B NMEA Standard Data Message145
WS425 NMEA Extended Profile (V. 0183)146
Table 51 WS425 NMEA Extended Profile Parameter Descriptions146
WS425 A/B NMEA Extended Commands147
WS425 A/B NMEA Extended Data Message148
Table 52 Checksum Table148
WS425 A/B ASCII Profile149
WS425 A/B ASCII Commands150
Table 53 WS425 A/B ASCII Commands150
WS425 A/B WAT11 Profile152
WS425 A/B WAT11 Commands153
Profile (V 1.3)153
Table 54 Configurable Parameters for WS425 A/B WAT11 Profile153
Table 55 Configurable Parameters154
Commands155
Table 56 SDI-12 Commands155
Data Messages162
WS425 A/B SDI-12 Message for C and M Command162
WS425 A/B SDI-12 Message for V Command163
Requesting Cyclic Redundancy Check163
Maintenance165
WMT700 Maintenance165
Testing Operation166
Troubleshooting169
Problem Situations169
Error and Event Messages171
Table 57 Error and Event Messages171
Restoring Serial Port Settings172
Table 58 Restored Serial Port Settings173
Technical Data175
Measuring Specifications175
Table 59 WMT700 Wind Speed Measuring Specifications175
Table 60 WMT700 Wind Direction Measuring Specifications175
Electrical Specifications176
Table 61 WMT700 Electrical Specifications176
Table 62 WMT700 Output Specifications176
Environmental Specifications177
Table 63 WMT700 Environmental Specifications177
Mechanical Specifications178
Figure 46 WMT700 Dimensions178
Table 64 WMT700 Mechanical Specifications178
Accessory List179
Figure 47 WMT70FIX Mounting Kit Dimensions179
Figure 48 ASOS Mounting Adapter Dimensions179
Table 65 Tools179
Table 66 Bird Obstructions180
Table 67 Cables180
Table 68 WMT700 Mounting Accessories180
Table 69 WS425 Mounting Accessories181
Appendix A: Command Set for WMT700183
Table 70 Command Set for WMT700183
Appendix B: Typical System Environments185
Figure 49 System Environment with Serial Port COM1 Only185
Figure 50 System Environment with Analog Output Only185
Figure 51 System Environment with Serial Ports COM1 and COM2186
Figure 52 System Environment with Backup Battery186
Appendix C: Default Settings for Different Communication187
Profiles187
Default Settings for Different Communication Profiles187
Table 71 Default Settings for Different Digital Communication Profiles187
Table 72 Parameters with no Protocol-Specific Default Value188
Appendix D: Configuration Parameter Descriptions189
Table 73 Configuration Parameter Descriptions189
Appendix E: WMT700 NMEA MWV Profile195
Configurable Parameters195
Table 74 Configurable Parameters for WMT700 NMEA MWV Profile195
WMT700 NMEA MWV Commands196
WMT700 NMEA MWV Data Message197
Missing Readings197
Appendix F: WMT700 Accessories199
Figure 53 Complete Set of WMT700 Accessories199
Appendix G: Certificate201
Index203
Warranty207
Technical Support207
Recycling207

Vaisala WINDCAP WMT700 Series - Figure 12 Ultrasonic Measurement Principle

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