Campbell CDM-VW300 Series, User Manual

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CDM-VW300 Series Dynamic Vibrating-Wire Analyzers
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each instruction, consult CRBasic Editor Help . CRBasic Editor is included with
PC400 , LoggerNet , and RTDAQ datalogger support software.
CDM_VW300Config() sends configuration settings to the CDM-VW300. It is
placed before the BeginProg statement in the CRBasic program. Before starting
the datalogger program, the datalogger configures the specified analyzer according
to the arguments in this instruction.
CDM_VW300Config() cannot be used to set the CPI address of the CDM-
VW300. See Section 7.5.9, CPI Bus Address , for information on how to set the
CPI address.
CDM_VW300Config (DeviceType, CPIAddress, SysOptions, ChanEnable,
ResonAmp, LowFreq, HighFreq, ChanOptions, Mult, Offset, SteinA,
SteinB, SteinC, RF_MeanBins, RF_AmpBins, RF_LowLim, RF_HighLim,
RF_Hyst, RF_Form)
Scan() sets the scan interval to match the desired scan rate used for CDM-VW300
dynamic readings. For example:
Scan (50,msec,100,0)
is the Scan() instruction with arguments set for a 20 Hz CDM-VW300 scan rate.
Table 7-4 lists other scan matches.
Table 7-4. CDM-VW300 Scan Rate / Datalogger Scan()
Interval Pairings
CDM-VW300 Scan Rate
Datalogger Scan()
Interval
20 Hz 50 ms
50 Hz 20 ms
100 Hz 10 ms
The CR3000, CR1000, and CR800 dataloggers do not support
operation of the CDM-VW300 in 200 and 333.3 Hz modes.
CDM_VW300Dynamic() captures dynamic readings from sensors. It is used in
the main scan of the CRBasic program.
CDM_VW300Dynamic (CPIAddress, DestFreq, DestDiag)
CDM_VW300Static() captures static readings such as thermistor, static
frequency, and standard deviation of dynamic frequencies at 1 Hz. It is used in
the main scan inside of a
TimeIntoInterval() conditional statement. Set
TimeIntoInterval() to capture static data at 1 Hz. Capturing static data less
frequently is possible, but when doing so, only the latest static frequency sample
will be available.
CDM_VW300Static (CPIAddress, DestFreq, DestTherm, DestStdDev)
CDM_VW300RainFlow() obtains rainflow-histogram data. It is used in a slow
sequence.
CDM_VW300RainFlow (CPIAddress, RF1, RF2, RF3, RF4, RF5, RF6, RF7, RF8)
NOTE