Campbell CDM-VW300 Series Manuál stáhnout pdf (Strana 107)

Appendix G. CRBasic Program Library

DataTable (dynamic,true,-1)

Sample (8,Freq(),IEEE4)

Sample (8,Diag(),IEEE4)

EndTable

'Store Rainflow-Histogram Output

DataTable (rainflhist,true,-1)

RainflowSample(RF1(),IEEE4)

RainflowSample(RF2(),IEEE4)

RainflowSample(RF3(),IEEE4)

RainflowSample(RF4(),IEEE4)

RainflowSample(RF5(),IEEE4)

RainflowSample(RF6(),IEEE4)

RainflowSample(RF7(),IEEE4)

RainflowSample(RF8(),IEEE4)

EndTable

BeginProg

'50 Hz/20msec scan rate

Scan(20,msec,500,0)

CDM_VW300Dynamic(CPI_ADDR,Freq(),Diag())

CallTable dynamic

If TimeIntoInterval (0,1,Sec) Then

CDM_VW300Static(CPI_ADDR,StaticFreq(),Therm(),DynStdDev())

CallTable static

EndIf

NextScan

SlowSequence

Scan(5,sec,10,0)

'Rainflow-Histogram call must be in a slow sequence scan

CDM_VW300Rainflow(CPI_ADDR,RF1(),RF2(),RF3(),RF4(),RF5(),RF6(),RF7(),RF8())

CallTable rainflhist

NextScan

EndProg

G.1.10 50 Hz Diagnostic Example — One CDM-VW300, Two

Geokon 4000 Sensors with FieldCal()

'===Geokon4000-50Hz2ChDiags_4-25-13.CR3===

'CR3000 datalogger

'CDM-VW300 vibrating-wire analyzer

'Program to read 50-Hz diagnostic data from one CDM-VW300 analyzer measuring two Geokon 4000

'strain gages.

'Diagnostic code evaluation example -- use counters to track diagnostic flag counts.

'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

'Constants specific to the Geokon 4000 strain gages

Const GageFactor = 4.062 'G = 4.062 - Gage factor taken from sensor manual

Const NomBatchFactor = 0.97 'B=0.97 - Batch Factor taken from cal sheet provided with sensors

'Output will be in Strain, not Digits nor Frequency

Public Strain(2) : Units Strain() = Microstrain 'Measured strain output in units of Microstrain

Public StrainBL(2) : Units Strain() = Microstrain 'Baseline/offset strain reading in units of

'Microstrain (for calibration)

Public DCode(2) As Long 'Dynamic diagnostic code

Public StaticStrain(2) : Units StaticStrain() = Microstrain 'Static (1Hz) strain reading in

microstrain

Public StaticDigits(2) 'Calculated Static (1Hz) Digits output (for troubleshooting)

Public StaticFreq(2) : Units StaticFreq) = Hz 'Calculated Frequency (1Hz) from static

'digits (for troubleshooting).

G-15

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 121 122

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