Campbell Scientific SS100 Sensor Simulator - Manual (Page 6)

SS100 Sensor Simulator
CRBasic Measurement Instruction:
VoltSe
(WindDir,1,mv2500C,1,1,0,_60Hz,360/2200,0)
Wind Speed (Use SS100 High Frequency Pulse Output)
Range:
0-50 m/s
Accuracy: +/- 5% > 5 m/s or 0.2 m/s < 5 m/s
Resolution: 0.1 m/s
Wind Speed Output: Linear, Calm = 3Hz, 50 m/s = 140 Hz
Wiring
SS100 CR1000
P P1
G
Multiplier and offset calculation:
Using the equation of a line with two known points (0,3) and (50,140):
y=mx + b; m = (50-0) / (140-3) = 0.365 m/s / Hz
b=y-mx; 50 - .365(140) = -1.095 m/s
CRBasic measurement instruction:
PulseCount (WS_ms,1,1 ,0,1,.365,-1.095) 'configured for high frequency
CR1000 Wind Speed and Wind Direction Example
'CR1000 Series Datalogger
'Declare Public Variables
Public WS_ms, WindDir
'Define Data Tables
DataTable (SS100,true,-1)
DataInterval
(0,60,Sec,10)
WindVector (1,WS_ms,WindDir,FP2,False,0,0,0)
FieldNames ("WS_ms,WindDir,WindDir_SD1")
EndTable
'Main Program
BeginProg
Scan
(1,Sec,0,0)
'Analog Output - Simulated Wind Direction
VoltSe (WindDir,1,mv2500C,1,1,0,_60Hz,360/2200,0)
'Pulse Output - Simulated Wind Speed
PulseCount (WS_ms,1,1 ,0,1,.365,-1.095) 'high frequency Hz
'Call
Output Tables
CallTable SS100
NextScan
EndProg
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