Campbell Met One 034A-L Manuál s instrukcemi stáhnout pdf (Strana 25)

Appendix B. Example Program

The following CR1000 program measures the 034B every 5 seconds, and store

mean wind speed, unit vector mean direction, and standard deviation of the

direction every 60 minutes. Wiring for the examples is given in TABLE B-1.

TABLE B-1. Wiring for Example Program

Color Description CR1000

Red Wind Spd. Signal P1

Black Wind Spd. Reference

Green Wind Dir. Signal SE 1

Blue Wind Dir. Excitation EX 1

White Wind Dir. Reference

Clear Wind Dir. Shield

'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

B-1

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Campbell Met One 034A-L Manuál s instrukcemi Strana 25