Campbell CDM-VW300 Series Manuel télécharger pdf (Page 102)

Appendix G. CRBasic Program Library

'via excitation, given in volts. This should be in the range 0.010 to 0.001

Dim Max_AMP(8) = { 0.002, 0.002, 0.002, 0.002, 0.002, 0.002, 0.002, 0.002}

'Low-Frequency Boundary (sensor frequency should never fall below

'this value regardless of environmental changes)

Dim F_Low(8) = { 300, 300, 300, 300, 300, 300, 300, 300}

'High-Frequency Boundary (sensor frequency should never exceed

'this value regardless of environmental changes)

Dim F_High(8) = { 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000}

'Output Format - Hz vs. Hz^2 :: Value of 0 – measured frequency is given in units of Hz,

'Value of 1 – measured frequency is squared and given in units of Hz^2

Dim OutForm(8) As Long = { 0, 0, 0, 0, 0, 0, 0, 0}

'Multiplier (factor) to be applied to sensor output frequency

Dim Mult(8) = { 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0}

'Offset (shift) to be applied to sensor output frequency

Dim Off(8) = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}

'Steinhart-Hart coefficients [A,B,C] for converting thermistor ohms to

'temperature in Celsius. Specifying zeroes for A,B,C results in a reading in Ohms.

Dim SteinA(8) = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}

Dim SteinB(8) = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}

Dim SteinC(8) = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}

'Rainflow configuration (not used in this program, but required as configuration arguments)

Dim RFMB(8) As Long = { 20, 20, 20, 20, 20, 20, 20, 20}

Dim RFAB(8) As Long = { 20, 20, 20, 20, 20, 20, 20, 20}

Dim RFLL(8) = { 400.0, 400.0, 400.0, 400.0, 400.0, 400.0, 400.0, 400.0}

Dim RFHL(8) = {4000.0,4000.0,4000.0,4000.0,4000.0,4000.0,4000.0,4000.0}

Dim RFHY(8) = { 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005}

Dim RFOF(8) As Long = { 100, 100, 100, 100, 100, 100, 100, 100}

'Configure the CDM-VW300 series device. Use the variable arrays declared above

CDM_VW300Config(1,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)

'Static Frequency reading (1Hz output)

Sample (8,StaticFreq(),IEEE4)

'Thermistor reading : Ohms or DegC

Sample (8,Therm(),IEEE4)

'Standard Deviation of dynamic readings taken during the most recent second.

Sample (8,DynStdDev(),IEEE4)

EndTable

DataTable (dynamic,true,-1)

'Dynamic Frequency (50Hz output)

Sample (8,Freq(),IEEE4)

'Diagnostic code for the current dynamic reading.

Sample (8,Diag(),IEEE4)

EndTable

BeginProg

'50 Hz/20msec scan rate

Scan(20,msec,500,0)

CDM_VW300Dynamic(CPI_ADDR,Freq(),Diag()) 'Get dynamic readings.

CallTable dynamic

If TimeIntoInterval (0,1,Sec) Then 'Process static data only once per second.

CDM_VW300Static(CPI_ADDR,StaticFreq(),Therm(),DynStdDev()) 'Get static readings

CallTable static

EndIf

NextScan

EndProg

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Campbell CDM-VW300 Series Manuel Page 102

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