7.3.9 Send Data Command (aD)........................................................................... 9
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7.3.10 Examples of aM, aC and aD Commands.....................................................98
7.3.11 Continuous Measurement (aR)................................................................. 100
7.3.12 Continuous Measurement with CRC (aRC).............................................. 102
7.4 NMEA 0183 v3.0 Protocol................................................................................. 102
7.4.1 Device Address (?)...................................................................................... 102
7.4.2 Acknowledge Active Command (a)..........................................................103
7.4.3 MWV Wind Speed and Direction Query...................................................104
7.4.4 XDR Transducer Measurement Query.......................................................105
7.4.5 TXT Text Transmission..................................................................................113
7.4.6 Automatic Mode........................................................................................... 114
7.4.7 Automatic Composite Data Message (aR0)..............................................115
8. Sensor and Data Message Settings........................................................... 117
8.1 Sensor Configuration and Data Message Formatting.................................... 117
8.
1.1 Wind Sensor.................................................................................................. 117
8.1.2 Pressure, Temperature, and Humidity Sensors........................................ 122
8.1.3 Precipitation Sensor.................................................................................... 127
8.1.4 Supervisor Message.....................................................................................132
8.1.5 Composite Data Message (aR0)................................................................135
8.1.6 Analog Input.................................................................................................136
8.1.7 Analog Output............................................................................................. 143
9. Maintenance....................................................................................................... 147
9.1 Cleaning...............................................................................................................147
9.1.1 Cleaning the Radiation Shield....................................................................147
9.2 Replacing PTU Module...................................................................................... 147
10. Troubleshooting.................................................................................................151
10.1 Self-Diagnostics..................................................................................................153
10.1.1 Error Messaging/Text Messages................................................................ 153
10.1.2 Rain and Wind Sensor Heating Control....................................................154
10.1.3 Operating Voltage Control......................................................................... 155
10.1.4 Missing Readings and Error Indication......................................................155
11. Technical Specifications................................................................................157
11.1
Performance........................................................................................................157
11.2 Inputs and Outputs............................................................................................ 159
11.3 Environmental Conditions..................................................................................161
11.4 Mechanical Specifications................................................................................. 162
11.5 Options and Accessories...................................................................................163
11.6 Type Label...........................................................................................................164
11.7 Dimensions (mm / inch)....................................................................................165
Appendix A: Networking.......................................................................................17
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A.1 Connecting Several Transmitters on Same Bus...............................................171
A.2 SDI-12 Serial Interface.........................................................................................171
A.2.1 Wiring SDI-12................................................................................................. 171
A.2.2 SDI-12 Communication Protocol................................................................. 171
A.3 RS-485 Serial Interface......................................................................................172
A.3.1 RS-485 Wiring..............................................................................................172
A.3.2 RS-485 Communication Protocol.............................................................. 172
A.3.3 ASCII, Polled................................................................................................. 172
A.3.4 NMEA 0183 v3.0, Query.............................................................................. 173
A.3.5 NMEA 0183 v3.0 Query with ASCII Query Commands............................175
Table of Contents
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