Emerson MICRO MOTION 2700 - 2.4 Characterize the flowmeter (if required)

Integratethemeterwiththecontrolsystem
Procedure
1.Setthechanneltooperateasafrequencyoutput,ifyouhavenotalreadydoneso.
2.SetFrequencyOutputScalingMethod.
Frequency=Flow
Frequencycalculatedfromowrate
Pulses/UnitAuser-speciednumberofpulsesrepresentsoneowunit
Units/PulseApulserepresentsauser-speciednumberofowunits
3.Setadditionalrequiredparameters.
▪IfyousetFrequencyOutputScalingMethodtoFrequency=Flow,setRateFactorand
FrequencyFactor.
▪IfyousetFrequencyOutputScalingMethodtoPulses/Unit,denethenumberofpulses
thatwillrepresentoneowunit.
▪IfyousetFrequencyOutputScalingMethodtoUnits/Pulse,denethenumberofunits
thateachpulsewillindicate.
Frequency=Flow
TheFrequency=Flowoptionisusedtocustomizethefrequencyoutputforyourapplicationwhen
youdonotknowappropriatevaluesforUnits/PulseorPulses/Unit.
IfyouselectFrequency=Flow,youmustprovidevaluesforRateFactorandFrequencyFactor:
RateFactorThemaximumowratethatyouwantthefrequencyoutputtoreport.
Abovethisrate,thetransmitterwillreportA110:Frequency
OutputSaturated.
FrequencyFactorAvaluecalculatedasfollows:
where:
TFactortoconvertselectedtimebaseto
seconds
NNumberofpulsesperowunit,as
conguredinthereceivingdevice
TheresultingFrequencyFactormustbewithintherangeofthefrequencyoutput(0to10,000Hz):
▪IfFrequencyFactorislessthan1Hz,recongurethereceivingdeviceforahigherpulses/unit
setting.
▪IfFrequencyFactorisgreaterthan10,000Hz,recongurethereceivingdeviceforalower
pulses/unitsetting.
Tip
IfFrequencyOutputScaleMethodissettoFrequency=Flow,andFrequencyOutputMaximum
PulseWidthissettoanon-zerovalue,MicroMotionrecommendssettingFrequencyFactorto
avaluelessthan200Hz.
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MicroMotionModel2700TransmitterswithIntrinsicallySafeOutputs