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VAISALA________________________________________________________________________ 7 
APPENDIX A 
WIRING DIAGRAMS..................................................................................263 
AWS330 System Basic Wiring Diagrams .........................263 
APPENDIX B 
CALCULATION FORMULAS ....................................................................273 
Dewpoint Temperature ........................................................273 
Heat Index .............................................................................274 
Wind Chill (NWS 2001).........................................................275 
Wet Bulb Temperature.........................................................275 
QFE/QFF Pressure ...............................................................278 
QNH Pressure.......................................................................279 
Wind Calculation Formulas.................................................280 
Wind Speed Average...................................................280 
Scalar Wind Direction Average Method.......................281 
Sunshine Duration ...............................................................282 
Evapotranspiration...............................................................285 
APPENDIX C 
EXAMPLE MESSAGES.............................................................................289 
CSV Message........................................................................289 
Table Message......................................................................290 
SMS Message .......................................................................290 
Alarm Messages...................................................................290 
Table Message with Alarm List...........................................291 
APPENDIX D 
SENSOR STATUS VALUES......................................................................293