Campbell Scientific CS11-L Current Transformer - Manual (Page 10)

CS11-L Current Transformer
'CR1000 Series Datalogger
' CS11-L_with_ACPower_AmpsOnly.CR1
'date: June 24, 2013
'
' Wiring:
' SE2 White CS11-L
' AG Black CS11-L
' AG Clear CS11-L
' AG Red CS11-L
PipeLineMode ' must be pipeline mode
Public Batt_volt
Public Amp_Mult
Public Amperage
Dim Array1(10)
PreserveVariables ' to store values between power cycles
DataTable (AmpTable,True,-1)
DataInterval (0,1,Min,10)
Average (1,Amperage,FP2,False)
Maximum (1,Amperage,FP2,False,False)
EndTable
BeginProg
Amp_Mult = 200/1000 ' 0.2 multiplier for the CS11-L (200Amps/1000mV=0.2)
Scan (500,mSec,0,0)
Battery (Batt_volt)
ACPower (Array1(),1,60,1,0.345345,120,2,.2,200,1)
Amperage=Array1(4)
' If Amperage <= 0.15 Then Amperage = 0
CallTable (AmpTable)
NextScan
EndProg
If no potential transformer will be used, the CS11-L and the ACPower
instruction will give you amperage, but not the other values, so you should
ignore all of the other values returned from the ACPower instruction. Most of
these other values will show up as NAN (not a number) when no potential
transformer is used.
5.2 ACPower (from CRBasic Help)
The ACPower instruction measures real AC power and a number of power
quality parameters for single-phase, split-phase, and three-phase ‘Y’
configurations.
Syntax
ACPower ( DestAC, ConfigAC, LineFrq, ChanV, VMult, MaxVrms, ChanI,
IMult, MaxIrms, RepsI )
The ACPower instruction is suitable for net-metering applications, as well as
variable-frequency (wild AC) applications. Potential and current transformers
must be used to measure the voltage and current using the datalogger.
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