Campbell Met One 034B, Instruction Manual

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B-1
Appendix B. Example Program
The following CR1000 program measures the 034B every 5 seconds, and
stores mean wind speed, unit vector mean direction, and standard deviation of
the direction every 60 minutes. Wiring for the example is given in TABLE
B-1 .
TABLE B-1. Wiring for Example Program
Colo u r Description CR1000
Red Wind Speed Signal
P1
Black Wind Speed Reference
⏚
Green Wind Direction Signal SE 1
Blue Wind Direction Excitation EX 1
White Wind Direction Reference
⏚
Clear Wind Direction Shield
⏚
CRBasic Example B-1. CR1000 Program That Measures the 034B
'CR1000
'Declare Variables and Units
Public Batt_Volt
Public WS_ms
Public WindDir
Units Batt_Volt=Volts
Units WS_ms=meters/second
Units WindDir=degrees
'Define Data Tables
DataTable (Table1,True,-1)
DataInterval (0,60,Min,10)
WindVector (1,WS_ms,WindDir,FP2,False,0,0,0)
FieldNames ("WS_ms_Avg,WindDir_Avg,WindDir_StDev")
EndTable
'Main Program
BeginProg
Scan (5,Sec,1,0)
'Default Datalogger Battery Voltage measurement Batt_Volt:
Battery (Batt_Volt)
'034A/034B Wind Speed & Direction Sensor measurements WS_ms and WindDir:
PulseCount (WS_ms,1,1,2,1,0.7989,0.28)
If WS_ms=0.2811 Then WS_ms=0
BrHalf (WindDir,1,mV2500,1,1,1,2500,True,0,_60Hz,720.0,0) 'Use 5000 mV
If WindDir>=360 OR WindDir < 0 Then WindDir=0 'excitation for
'Call Data Tables and Store Data 'the CR3000 and
CallTable (Table1) 'CR5000 dataloggers
NextScan
EndProg