Chapter 3 ______________________________________________________ Functional Description 
 
VAISALA_______________________________________________________________________ 21 
Sensor Reading 
Reading frequencies for AWS330 sensors are listed in Table 3 below.  
Table 3  Sensor Reading Frequencies 
Sensor   Output  Frequency (s) 
HMP155 Temperature 10 
HMP155 Humidity  10 
BARO-1 Barometric pressure  10 
WMT703 Wind speed 1 
WMT703 Wind direction 1 
WAV15/WAA15 Wind speed  1 
WAV15/WAA15 Wind direction  1 
RG13 Rainfall 60 
(1
 
CMP6 Solar radiation 10 
QMT110 Soil temperature 10 
IRU9429 Snow height 60 
(1
 AWS330 registers all contact closures, but updates the output each 
60 seconds.