Campbell CDM-VW300 Series, Руководство пользователя

Страница: 110 / 118

Appendix G. CRBasic Program Library
G-20
Public NewDynFileStored As Boolean 'Needed for TableFile
Public NewStaticFileStored As Boolean 'True when a new file was just created on the card
Public LastDynFileName As String * 35 'The name of the new file just created on the card
Public LastStaticFileName As String * 35
'Configure the CDM-VW300 device
Dim Enable(2) As Long = { 1, 1}
Dim Max_AMP(2) = { 0.002, 0.002}
Dim F_Low(2) = { 300, 300}
Dim F_High(2) = { 6000, 6000}
'Use Hz^2 (1) instead of Hz (0) so we can get to digits
Dim OutForm(2) As Long = { 1, 1}
'Use a multiplier of 0.001 to divide by 1000 and get digits, then scale further to get to Strain
Dim Mult(2) = { 0.001*GaugeFactor*NomBatchFactor, 0.001*GaugeFactor*NomBatchFactor} 'Digits
(Hz^2/1000) times G times B results in strain
Dim Off(2) = { 0.0, 0.0}
'Use Steinhart-Hart coefficients To get Thermistor output in DegC
Dim SteinA(2) = {1.4051E-3, 1.4051E-3}
Dim SteinB(2) = { 2.369E-4, 2.369E-4}
Dim SteinC(2) = { 1.019E-7, 1.019E-7}
Dim RFMB(2) As Long = { 20, 20}
Dim RFAB(2) As Long = { 20, 20}
Dim RFLL(2) = { 400.0, 400.0}
Dim RFHL(2) = {4000.0,4000.0}
Dim RFHY(2) = { 0.005, 0.005}
Dim RFOF(2) As Long = { 100, 100}
CDM_VW300Config (0,CPI_ADDR,0,Enable(),Max_AMP(),F_Low(),F_High(), _
OutForm(),Mult(),Off(), SteinA(),SteinB(),SteinC(), _
RFMB(),RFAB(),RFLL(),RFHL(),RFHY(),RFOF())
DataTable (static,true,-1)
'Even though data is observed once per second,
'write out 1 minute averages
DataInterval (0,1,Min,10)
'Using TableFile, write the 1 minute averages out each
'15 minutes to a file on the CRD (Compact Flash) device
TableFile ("CRD:"&Status.StationName(1,1)&".TFStatic", _
64,-1,0,15,Min,NewStaticFileStored,LastStaticFileName)
Average (2,StaticStrain(),IEEE4,False)
Average (2,Temp(),IEEE4,False)
Average (2,StrainStdDev(),IEEE4,False)
EndTable
DataTable (dynamic,true,-1)
'Using DataEvent, only store data in this table when
'the Microstrain reading is greater than 200 on either channel
DataEvent (100,(Strain(1) > 200) OR (Strain(2) > 200),1,100)
'Using TableFile, write out the 50Hz data to the CRD (Compact
'flash) into a new file whenever 600 data records have been captured
TableFile ("CRD:"&Status.StationName(1,1)&".TFDynamic", _
64,-1,600,0,Sec,NewDynFileStored,LastDynFileName)
Sample (2,Strain(),IEEE4)
Sample (2,DCode(),IEEE4)
EndTable
DataTable(CalHist,NewFieldCal,-1)
CardOut (0 ,2000)
SampleFieldCal
EndTable
BeginProg
'50 Hz/20msec scan rate
Scan (20,msec,500,0)
CDM_VW300Dynamic (CPI_ADDR,Strain(),DCode()) 'Get unshifted strain
'Now shift the given Strain using the Baseline/Offset value
Strain(1) = Strain(1) + StrainBL(1) : Strain(2) = Strain(2) + StrainBL(2)
'Zeroing calibration for Geokon 4000 Vibrating Wire Strain Gauge
'Strain offset and Temperature baseline readings
FieldCal(0,Strain(),2,0,StrainBL(),ZeroMode,0,1,100) 'Calibrate for 2 seconds
FieldCal(4,Temp(),2,0,TempBL(),ZeroMode,0,1,100)
CallTable dynamic
CallTable CalHist
If TimeIntoInterval (0,1,Sec) Then
CDM_VW300Static (CPI_ADDR,StaticStrain(),Temp(),StrainStdDev()) 'Obtain unshifted static
' strain
'Calculate static digits reading (for troubleshooting)
StaticDigits(1) = StaticStrain(1)/GaugeFactor/NomBatchFactor
StaticDigits(2) = StaticStrain(2)/GaugeFactor/NomBatchFactor
'Now shift the given StaticStrain using the Offset/Baseline reading to obtain