Campbell CDM-VW300 Series Instrukcja Obsługi Pobierz pdf (Strona 94)

Appendix G. CRBasic Program Library

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

Dim Off(2) = { 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(2) = { 0.0, 0.0}

Dim SteinB(2) = { 0.0, 0.0}

Dim SteinC(2) = { 0.0, 0.0}

'Rainflow configuration (not used in this program,

'but required as configuration arguments)

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}

'Configure the CDM-VW300 series device

'Use the variable arrays declared above

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)

'Static Frequency reading (1 Hz output)

Sample (2,StaticFreq(),IEEE4)

'Thermistor reading : Ohms or DegC

Sample (2,Therm(),IEEE4)

'Standard Deviation of dynamic readings

'taken during the most recent second

Sample (2,DynStdDev(),IEEE4)

EndTable

DataTable (dynamic,true,-1)

'Dynamic Frequency (20 Hz output)

Sample (2,Freq(),IEEE4)

'Diagnostic code for the current dynamic reading

Sample (2,Diag(),IEEE4)

EndTable

BeginProg

'20 Hz/50msec scan rate

Scan(50,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

G.1.2 20 Hz Measurement Example — One CDM-VW305, Eight

Channels

'===20Hz-1Device8Ch_4-25===

'CR3000 datalogger

'CDM-VW305 vibrating-wire analyzer

'Program to read 20-Hz dynamic data from one CDM-VW305 analyzer measuring eight channels

'IMPORTANT -- Ensure that the CPI address coded on the following line matches the address

'reported for the attached analyzer in the DevConfig or DVWTool software.

Const CPI_ADDR = 1 '<<<<<<<<<<<<<<SET CPI ADDRESS HERE

Public Freq(8) 'dynamic frequencies

Public Diag(8) As Long 'diagnostic code

Public StaticFreq(8) 'Static (1Hz output) frequencies

Public Therm(8) 'Thermistor readings

G-2

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 121 122

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