Configureprocessmeasurement
2.SettheBaseTimeUnittominutes(min).
3.Calculatetheconversionfactor:
a.1thousandsofstandardcubicfeetperminute=1000cubicfeetperminute
b.GasStandardVolumeFlowConversionFactor=1/1000=0.001
4.SetGasStandardVolumeFlowConversionFactorto0.001.
5.SetGasStandardVolumeFlowLabeltoKSCFM.
6.SetGasStandardVolumeTotalLabeltoKSCF.
5.4.4ConfigureGasStandardVolumeFlowCutoff
DisplayNotavailable
ProLinkII
ProLink→Conguration→Flow→StdGasVolFlowCutoff
FieldCommunicatorCongure→ManualSetup→Measurements→GasStandardVolume→GSVCutoff
GasStandardVolumeFlowCutoffspeciesthelowestvolumeowratethatwillreportedasmeasured.All
volumeowratesbelowthiscutoffwillbereportedas0.
Procedure
SetVolumeFlowCutofftothedesiredvalue.
ThedefaultvalueforGasStandardVolumeFlowCutoffis0.0.Thelowerlimitis0.0.Thereisnoupperlimit.
InteractionbetweenGasStandardVolumeFlowCutoffandAOCutoff
GasStandardVolumeFlowCutoffdenesthelowestGasStandardVolumeowvaluethatthetransmitterwill
reportasmeasured.AOCutoffdenesthelowestowratethatwillbereportedviathemAoutput.If
mAOutputProcessVariableissettoGasStandardVolumeFlowRate,thevolumeowratereportedviathemA
outputiscontrolledbythehigherofthetwocutoffvalues.
GasStandardVolumeFlowCutoffaffectsbothgasstandardvolumeowvaluesreportedviaoutputsand
gasstandardvolumeowvaluesusedinothertransmitterbehavior(e.g.,eventsdenedongas
standardvolumeow).
AOCutoffaffectsonlyowvaluesreportedviathemAoutput.
tExample:CutoffinteractionwithAOCutofflowerthanGasStandardVolumeFlowCutoff
Conguration:
•mAOutputProcessVariablefortheprimarymAoutput:GasStandardVolumeFlowRate
•FrequencyOutputProcessVariable:GasStandardVolumeFlowRate
•AOCutofffortheprimarymAoutput:10SLPM(standardlitersperminute)
•GasStandardVolumeFlowCutoff:15SLPM
Result:IftheGasStandardVolumeowratedropsbelow15SLPM,volumeowwillbereportedas
0,and0willbeusedinallinternalprocessing.
78
MicroMotion9739MVDTransmitters