Manual

EMO‐3000
OperationandProgrammingManual
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16
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Ratio1+/‐%= XXXXX.
Ratio2+/‐%=  XXXXX. 
Ratio3+/‐%=  XXXXX. 
Ratio4+/‐%=  XXXXX. 
TheFlowMarginoperatesas+/‐theprogrammedamountbeforetrippingtheLimit.Forinstance,ifFlow
Limit1isprogrammedto100cc/mandthe
FlowMargin1isprogrammedto10 cc/m,theLimit1turns
onanytimetheFlowRategoesbelow90cc/morabove110cc/m.
RatioOperations
TheEMO‐3000canactasaRatioMonitorbyutilizingboththe A(pin4)andB(pin3)frequencyinputs.
Thisisespeciallyusefulintwo‐compon entsystemswherearatiomustbemaintainedwithinadefined
margin.
Theratiocalculationisbasedonthetotalizedvolumesoffluid
fromInputAandInputB.Thenumberof
pulsesprogrammedintheRatioSamplevariabledetermineshowoftenthecalculationupdates.When
theEMO‐3000countspulsesfromeitherflowmeter e qualtotheRatioSample,theRatiocalculationis
performed.ThedeviceusesthisdatatotriggerAlarmand
WarninglimitsundertheLimitRulesforRatio.
IgnoretheRatioSample’sdecimalpointwhenprogrammingthenumberofpulses(4.00isasamplesize
of400pulses).
ACTUALRATIO=INPUTATOTAL/INPUTBTOTAL
TheEMO‐3000performsthiscalculationwheneitherTotalAorTotalBreaches
theRatioSample
numberfirst.
TheratiodisplayscreenshowstheFlowRatesforAandB,theIdealRatio,andtheActualRatio.The
IdealRatioistheratiothatshouldbemaintainedatthespraynozzle(paintorcoatingapplication)and
requiresprogramming.TheIdealRatioisunderGENERAL
AintheDM‐3000.
Afterprogramming,theEMO‐3000comparestheActualRatiototheIdealRatioandtheRatioMargin
Limits.IfyouwouldlikewarningoralarmfunctionsforRatioerrors,programtheRatioLimitsforthe
allowableerror.YoumayneedtosettheInpu t/Outputpins
foroutputsfortheLimitfunctions.Referto
theInput/Outputsectiononpage14.
Notice
Notice