SUPERtrol II - Instrumartof questions based on flow equation, fluid, and flowmeter type desired in...

SUPERtrol IIFlow Computer

Third EdiTion

99589 01/25/11

KESSLER-ELLIS PRODUCTS 10 Industrial Way EastEatontown, NJ 07724

800-631-2165 • 732-935-1320Fax: 732-935-9344

http: / /www.kep.com

ST2 Flow Computer

SAFETY INSTRUCTIONS .............................................................................................................11. INTRODUCTION 1.1UnitDescription............................................................................................................2 1.2Specifications...............................................................................................................32. INSTALLATION 2.1GeneralMountingHints................................................................................................8 2.2MountingDiagrams......................................................................................................83. APPLICATIONS 3.1SteamMass................................................................................................................13 3.2SteamHeat................................................................................................................. 11 3.3SteamNetHeat..........................................................................................................13 3.4SteamDeltaHeat.......................................................................................................14 3.5CorrectedGasVolume...............................................................................................15 3.6GasMass...................................................................................................................16 3.7GasCombustionHeat................................................................................................17 3.8CorrectedLiquidVolume............................................................................................18 3.9LiquidMass................................................................................................................19 3.10LiquidCombustionHeat...........................................................................................20 3.11LiquidSensibleHeat.................................................................................................21 3.12LiquidDeltaHeat......................................................................................................22 3.13Steam–CondensateHeat.......................................................................................23

4. WIRING 4.1TerminalDesignations................................................................................................24 4.2TypicalWiringConnections........................................................................................25 4.2.1FlowInput...................................................................................................25 4.2.2StackedDPInput........................................................................................25 4.2.3PressureInput............................................................................................25 4.2.4TemperatureInput......................................................................................26 4.2.5Temperature2Input...................................................................................26 4.3WiringInHazardousAreas.........................................................................................29 4.3.1FlowInput...................................................................................................27 4.3.2PressureInput............................................................................................27 4.3.3TemperatureInput......................................................................................27

5. UNIT OPERATION 5.1FrontPanelOperationConceptforOperateMode..................................................... 28 5.2GeneralOperation......................................................................................................29 5.3PasswordProtection...................................................................................................29 5.4RelayOperation..........................................................................................................29 5.5PulseOutput..............................................................................................................29 5.6AnalogOutputs...........................................................................................................29 5.7FunctionKeys;DisplayGrouping...............................................................................29 5.8RS-232SerialPortOperation.....................................................................................30 5.8.1PCCommunications...................................................................................30 5.8.2OperationofRS-232SerialPortwithPrinters............................................ 30 5.9RS-485SerialPortOperation.....................................................................................30 5.10PauseComputationsPrompt....................................................................................30

6. PROGRAMMING 6.1FrontPanelOperationConceptforProgramMode.................................................... 31 6.2EZSetup....................................................................................................................32 6.3DetailedMenuDescriptions........................................................................................34 6.4SystemParameters....................................................................................................35 6.5Display........................................................................................................................40 6.6SystemUnits..............................................................................................................42 6.7FluidData...................................................................................................................49 6.8FlowInput...................................................................................................................54 6.9OtherInput..................................................................................................................66 6.10PulseOutput.............................................................................................................69 6.11CurrentOutput..........................................................................................................70 6.12Relays.......................................................................................................................74 6.13Communication.........................................................................................................78 6.14NetworkCard............................................................................................................85 6.15Service&Analysis....................................................................................................86

CONTENTS

ST2 Flow Computer

7. PRINCIPLE OF OPERATION 7.1General.......................................................................................................................92 7.2SquareLawFlowmeterConsiderations......................................................................92 7.3FlowEquations...........................................................................................................92 7.3.1FlowInputComputation..............................................................................92 7.3.2PressureComputation................................................................................93 7.3.3TemperatureComputation..........................................................................93 7.3.4Density/ViscosityComputation...................................................................93 7.3.5CorrectedVolumeFlowComputation......................................................... 94 7.3.6MassFlowComputation.............................................................................95 7.3.7CombustionHeatFlowComputation.......................................................... 95 7.3.8HeatFlowComputation..............................................................................96 7.3.9SensibleHeatFlowComputation...............................................................96 7.3.10LiquidDeltaHeatComputation.................................................................96 7.3.11ExpansionFactorComputationforSquareLawFlowmeters................... 96 7.3.12UncompensatedFlowComputation......................................................... 98 7.3.13ILVAFlowMeterEquations.......................................................................99 7.4ComputationoftheD.P.Factor................................................................................100

8. RS-232 SERIAL PORT 8.1RS-232SerialPortDescription.................................................................................101 8.2InstrumentSetupbyPCOverSerialPort................................................................101 8.3OperationofSerialCommunicationPortwithPrinters............................................. 101 8.4ST2RS-232PortPinout...........................................................................................101

9. RS-485 SERIAL PORT 9.1RS-485SerialPortDescription.................................................................................102 9.2General.....................................................................................................................102 9.3OperationofSerialCommunicationPortwithPC.................................................... 102 9.4ST2RS-485PortPinout...........................................................................................102

10. FLOW COMPUTER SETUP SOFTWARE 10.1SystemRequirements............................................................................................103 10.2CableandWiringRequirements.............................................................................103 10.3InstallationforWindows™3.1or3.11.....................................................................103 10.4UsingtheFlowComputerSetupSoftware.............................................................103 10.5FileTab...................................................................................................................104 10.6SetupTab...............................................................................................................104 10.7ViewTab.................................................................................................................105 10.8Misc.Tab................................................................................................................105

11. GLOSSARY OF TERMS 10GlossaryOfTerms.....................................................................................................106

12. Diagnosis and Troubleshooting 12.1ResponseofST2onErrororAlarm.......................................................................109 12.2DiagnosisFlowchartandTroubleshooting..............................................................109 12.3ErrorMessages...................................................................................................... 110

Appendix A FluidPropertiesTable..................................................................................................... 113

Appendix B - Setup Menus SetupMenuswithOperatorCodeAccess...................................................................... 114 SetupMenuswithSupervisorCodeAccess................................................................... 115

Appendix C - RS-485 Modbus Protocol Description...................................................................................................................... 116 WiringPinoutandInstallation......................................................................................... 117 RegisterandCoilUsage................................................................................................. 119

Warranty.....................................................................................................................................121DecodingPartNumber................................................................................................................121

CONTENTS

ST2 Flow Computer

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!SAFETY INSTRUCTIONSThe following instructions must be observed.

• ThisinstrumentwasdesignedandischeckedinaccordancewithregulationsinforceEN60950(“Safetyofinformationtechnologyequipment,includingelectricalbusinessequipment”).

Ahazardoussituationmayoccurifthisinstrumentisnotusedforitsintendedpurposeorisusedincorrectly.Pleasenoteoperatinginstructionsprovidedinthismanual.

• Theinstrumentmustbeinstalled,operatedandmaintainedbypersonnelwhohavebeenproperlytrained.Personnelmustreadandunderstandthismanualpriortoinstallationandoperationoftheinstrument.

• Themanufacturerassumesnoliabilityfordamagecausedbyincorrectuseoftheinstrumentorformodificationsorchangesmadetotheinstrument.

Technical Improvements

• Themanufacturerreservestherighttomodifytechnicaldatawithoutpriornotice.

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1. IntroductionPeakDemandOptionThereareapplicationswherecustomerchargesaredeterminedinpartbythehighesthourlyaveragedflowrateobservedduringabillingperiod.ThepeakdemandoptionfortheST2isintendedforapplica-tionswhereitisimportanttocomputesuchanhourlyaverageflowrate,tonotethevalueofthepeakoccurrenceandthecor-respondingtimeanddateofthatevent.Thedemandlasthourrateiscomputedbasedonthecurrenttotalandthetotal60minutesprior.Thisvalueisrecomputedevery5minutes.Thepeakdemandisthehighestvalueobservedinthedemandlasthour.Thetimeanddatestampisthetimeanddateatwhichthehigh-estpeakdemandoccurred.TheDemandLastHourand/orPeakDemandcanbedirectlyviewedonthedisplaybypressingtheRATEkeyandthenscrollingthroughtherateswiththe^/varrowkeyuntilthede-sireditemisviewed.ThePeakTimeandDatestampcanbeviewedonthedisplaybypressingtheTIMEandthenscrollingthroughthetimere-latedparametersusingthe^/varrowkeysuntilthedesireditemisviewed.Alloftheseitemscanbeincludedintothescrollingdisplaylistalongwiththeotherprocessvaluesandtotalizersinauserselectablelist.ThepeakdemandmaybeclearedbypressingtheCLEARkeywhileviewingthePEAKDEMANDorbymeansofacommandontheserialport.ThePeakTimeandDatestampcanbeviewedonthedisplaybypressingtheTIMEandthenscrollingthroughthetimere-latedparametersusingthe^/varrowkeysuntilthedesireditemisviewed.TheDemandLastHourandPeakDemandcanbeassignedtooneoftheanalogoutputs.Thedemandlasthourorpeakdemandcouldthuslybeoutputonarecordingdevicesuchasastripchartrecorderorfedintoabuildingenergyautomationsystem.TheDemandLastHourandPeakDemandcanbeassignedtooneoftherelays.Thecustomercanbenotifiedthatheisapproachingorexceedingacontracthighlimitbyassigningthedemandlasthourtooneoftherelaysandsettingthewarn-ingpointintothesetpoint.Awarningmessagewouldalsobedisplayed.Thepeakdemandmaybeusedinconjunctionwiththeprintlistanddataloggertokeeptrackofhourlycustomerusageprofiles.TheDemandLastHour,PeakDemand,andTimeandDateStampinformationcanbeaccessedovertheserialports.ThePeakDemandmayalsoberesetovertheserialports.Thepeakdemandoptionmayalsobeusedasaconditiontocalloutinremotemeteringbymodem.

EZ SetupTheunithasaspecialEZsetupfeaturewheretheuserisguidedthrough a minimum number of steps to rapidly configure theinstrumentfortheintendeduse.TheEZsetuppreparesaseriesofquestionsbasedonflowequation,fluid,andflowmetertypedesiredintheapplication.

1.1 Unit Description:TheSUPERtrolII(ST2)FlowComputersatisfiestheinstrumentrequirementsforavarietyofflowmetertypesinliquid,gas,steamandheatapplications.Multipleflowequationsareavailableinasingleinstrumentwithmanyadvancedfeatures.

Thealphanumericdisplayoffersmeasuredparametersineasytounderstandformat.Manualaccesstomeasurementsanddisplayscrollingissupported.

TheversatilityoftheFlowComputerpermitsawidemeasureofapplicationswithintheinstrumentpackage.Thevarioushardwareinputsandoutputscanbe“soft”assignedtomeetavarietyofcommonapplicationneeds.Theuser“softselects”theusageofeachinput/outputwhileconfiguringtheinstrument.

Theisolatedanalogoutputcanbechosentofollowthevolumeflow,correctedvolumeflow,massflow,heatflow,temperature,pressure,ordensitybymeansofamenuselection.Mosthardwarefeaturesareassignablebythismethod.

Theusercanassign thestandardRS-232SerialPort fordatalogging,ortransactionprinting,orforconnectiontoamodemforremotemeterreading.

APCCompatiblesoftwareprogramisavailablewhichpermitstheusertorapidlyredefinetheinstrumentconfiguration.

Languagetranslationoptionfeaturesalsopermittheusertodefinehisownmessages,labels,andoperatorprompts.ThesefeaturesmaybeutilizedattheOEMleveltocreativelycustomizetheunitforanapplicationoralternatelytoprovideforforeignlanguagetranslations.BothEnglishandasecondlanguageresidewithintheunit.

NX-19optionAdvancedorderingoptionsareavailableforNaturalGascalculationswheretheuserrequirescompensationforcompressibilityeffects.Compensation for thesecompressibilityeffectsare requiredatmediumtohighpressureandareafunctionofthegasspecificgravity,%CO2,%Nitrogen,aswellastemperatureandpressure.ThecompressibilityalgorithmusedisthatforNX-19.

StackeddifferentialpressuretransmitteroptionThisoptionpermitstheuseofalowrangeandhighrangeDPtransmitteronasingleprimaryelementtoimproveflowtransducerandmeasurementaccuracy.

PeakdemandoptionThisoptionpermitsthedeterminationofanhourlyaveragedflowrate.Demandlasthour,peakdemandandtime/datestampingforapplicationsinvolvingpremiumbilling.

DataloggingoptionThisoptionprovidesdatastorageinformationin64kofbatterybackedRAM.Itemstobelogged,conditionstoinitiatethelogandavarietyofutilitiestoclearandaccessthedataviatheRS-232portareprovided.

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1.2 Specifications:Environmental

OperatingTemperature:0to+50CStorageTemperature:-40to+85CHumidity:0-95%Non-condensingMaterials:UL,CSA,VDEapproved

Approvals: CEApprovedLightIndustrial,UL/CSAPending

DisplayType:2linesof20charactersTypes:BacklitLCDandVFDorderingoptionsCharacterSize:0.3"nominalUserselectablelabeldescriptorsandunitsofmeasure

KeypadKeypadType:MembraneKeypadKeypadRating:SealedtoNema4Numberofkeys:16RaisedKeyEmbossing

EnclosureEnclosureOptions:Panel,Wall,ExplosionProofSize:SeeChapter2;InstallationDepthbehindpanel:6.5"includingmatingconnectorType:DINMaterials:Plastic,UL94V-0,FlameretardantBezel:TexturedpermattfinishEquipmentLabels:Model,safety,anduserwiring

NX-19 Compressibility Calculations Temperature -40to240F Pressure 0to5000psi SpecificGravity 0.554to1.0 Mole%CO2 0to15% Mole%Nitrogen 0to15%

Power InputThe factory equipped power options are internally fused.An internal lineto linefiltercapacitor isprovidedforaddedtransientsuppression.MOVprotectionforsurgetransientisalsosupported

UniversalACPowerOption: 85to276Vrms,50/60Hz Fuse:TimeDelayFuse,250V,500mADCPowerOption: 24VDC(16to48VDC) Fuse:TimeDelayFuse,250V,1.5A TransientSuppression:1000V

Flow Inputs:Flowmeter Types Supported:Linear: Vortex,Turbine,PositiveDisplacement,Magnetic,

GilFlo,GilFlo16point, ILVA16Point,MassFlowandothers

SquareLaw: Orifice,Venturi,Nozzle,V-Cone,Wedge,Averaging

Pitot,Target,Verabar,AccelabarandothersMulti-PointLinearization: Maybeusedwithallflowmetertypes.Including:16

point,UVCanddynamiccompensation.

Analog Input:Ranges Voltage:0-10VDC,0-5VDC,1-5VDC Current:4-20mA,0-20mABasicMeasurementResolution:16bitUpdateRate:2updates/secminimumAccuracy:0.02%FSAutomaticFaultdetection: Signalover/under-range, CurrentLoopBrokenCalibration: Operatorassisted learnmode. LearnsZero

andFullScaleofeachrangeFaultProtection: FastTransient:1000VProtection(capacitiveclamp) ReversePolarity:Noilleffects Over-VoltageLimit: 50 VDC Ove r vo l t ageprotection Over-CurrentProtection: Internallycurrentlimited protectedto24VDCOptional:StackedDPtransmitter0-20mAor4-20mA

Pulse Inputs:NumberofFlowInputs:oneInputImpedance:10kΩnominalTriggerLevel:(menuselectable) HighLevelInput LogicOn: 2to30VDC LogicOff: 0to.9VDC LowLevelInput(magpickup) Selectablesensitivity:10mVand100mVMinimumCountSpeed:0.25HzMaximumCountSpeed:Selectable:0to40kHzOvervoltageProtection:50VDCFastTransient:Protectedto1000VDC(capacitiveclamp)

Temperature, Pressure, Density InputsThe compensation inputs usage are menu selectable fortemperature, temperature 2, pressure, density, steam trapmonitorornotused.

Calibration:OperatorassistedlearnmodeOperation:RatiometricAccuracy:0.02%FSThermalDrift:Lessthan100ppm/CBasicMeasurementResolution:16bitUpdateRate:2updates/secminimumAutomaticFaultdetection: SignalOver-range/under-range CurrentLoopBroken RTDshort RTDopen TransientProtection:1000V(capacitiveclamp) ReversePolarity:Noilleffects Over-VoltageLimit(VoltageInput):50VDC Over-CurrentLimit(Internallylimitedtoprotectinputto 24VDC)

AvailableInputRanges (Temperature/Pressure/Density/TrapMonitor) Current:4-20mA,0-20mA Resistance:100OhmsDINRTD

100OhmDINRTD(DIN43-760,BS1904): ThreeWireLeadCompensation InternalRTDlinearizationlearnsicepointresistance 1mAExcitationcurrentwithreversepolarityprotection TemperatureResolution:0.1°C TemperatureAccuracy:0.5°C

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Datalogger (optional)Type:BatteryBackedRAMSize: 64kInitiate:Key,IntervalorTimeofDayItemsIncluded:SelectableListDataFormat:PrinterorCSVAccessviaRS-232command

Stored Information (ROM)Steam Tables (saturated & superheated), General FluidProperties, Properties of Water, Properties of Air, NaturalGas

User Entered Stored Information (EEPROM / Nonvolatile RAM)

TransmitterRanges,SignalTypesFluidProperties (specific gravity, expansion factor, specific heat,viscosity, isentropicexponent,combustionheatingvalue,Zfactor, RelativeHumidity)UnitsSelections(English/Metric)

RS-232 CommunicationUses:Printing,Setup,Modem,DataloggingBaudRates:300,1200,2400,9600Parity:None,Odd,EvenDeviceID:0to99Protocol:Proprietary,ContactfactoryformoreinformationChassisConnectorStyle:DB9FemaleconnectorPowerOutput: 8V(150mAmax.)providedtoModem

RS-485 Communication(optional)Uses:NetworkCommunicationsBaudRates:300,600,1200,2400,4800,9600,19200Parity:None,Odd,EvenDeviceID:1to247Protocol:ModBusRTUChassisConnectorStyle:DB9Femaleconnector(standard)

Excitation Voltage24VDC@100mAovercurrentprotected

Relay OutputsTherelayoutputsusageismenuassignableto(Individuallyfor each relay) Hi/Lo Flow RateAlarm, Hi/Lo TemperatureAlarm,Hi/LoPressureAlarm,PulseOutput(pulseoptions),WetSteamorGeneralpurposewarning(security).(Peakdemandanddemandlasthouroptional)

Numberofrelays:2(3optional)ContactStyle:FormCcontacts(FormAwith3relayoption)ContactRatings:240V,1ampFastTransientThreshold:2000V

Analog OutputsTheanalogoutputusageismenuassignabletocorrespondto theHeatRate,UncompensatedVolumeRate,CorrectedVolume Rate, Mass Rate, Temperature, Density, orPressure.(Peakdemandanddemandlasthouroptional)

NumberofOutputs:2Type:IsolatedCurrentSourcing(sharedcommon)IsolatedI/P/C:500VAvailableRanges:0-20mA,4-20mA(menuselectable)Resolution:16bitAccuracy:0.05%FSat20DegreesCUpdateRate:5updates/secTemperatureDrift:Lessthan200ppm/CMaximumLoad:1000ohmsComplianceEffect:Lessthan.05%Span60Hzrejection:40dBminimumEMI:Noeffectat10V/MCalibration:OperatorassistedLearnModeAveraging: UserentryofDSPAveragingconstantto causeansmoothcontrolaction

Isolated Pulse outputTheisolatedpulseoutputismenuassignabletoUncompensatedVolumeTotal,CompensatedVolumeTotal,HeatTotalorMassTotal.IsolationI/O/P:500VPulseOutputForm(menuselectable):OpenCollectorNPNor

24VDCvoltagepulseNominalOnVoltage:24VDCMaximumSinkCurrent:25mAMaximumSourceCurrent:25mAMaximumOffVoltage:30VDCSaturationVoltage:0.4VDCPulseDuration:UserselectablePulseoutputbuffer:8bit

Real Time ClockTheFlowComputerisequippedwitheitherasupercaporabatterybackedrealtimeclockwithdisplayoftimeanddate.Format: 24hourformatfortime Day,Month,Yearformatfordate DaylightSavingsTime(optional)

MeasurementThe FlowComputer can be thought of asmaking a seriesofmeasurementsofflow, temperature/densityandpressuresensors and then performing calculations to arrive at aresult(s)whichisthenupdatedperiodicallyonthedisplay.Theanalogoutputs,thepulseoutput,andthealarmrelaysarealsoupdated.Thecyclethenrepeatsitself.

Step1: Updatethemeasurementsofinputsignals-Raw Input Measurements are made at each input usingequationsbasedoninputsignaltypeselected.Thesystemnotesthe“outofrange”inputsignalasanalarmcondition.

Step2: ComputetheFlowingFluidParameters-The temperature, pressure, viscosity anddensity equationsarecomputedasneededbasedontheflowequationandinputusageselectedbytheuser.

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Step3:ComputetheVolumetricFlow-Volumetricflowisthetermgiventotheflowinvolumeunits.The value is computed based on the flowmeter input typeselected and augmented by any performance enhancinglinearizationthathasbeenspecifiedbytheuser.

Step4:ComputetheCorrectedVolumeFlowatReferenceConditions-Inthecaseofacorrectedliquidorgasvolumeflowcalculation,the corrected volume flow is computed as required by theselectedcompensationequation.

Step5:ComputetheMassFlow-Allrequiredinformationisnowavailabletocomputethemassflowrateasvolumeflowtimesdensity.Aheatflowcomputationisalsomadeifrequired.

Step6:CheckFlowAlarms-The flow alarm functions have been assigned to one ofthe above flow rates during the setup of the instrument.Acomparisonisnowmadebycomparingthecurrentflowratesagainstthespecifiedhiandlowlimits.

Step7:ComputetheAnalogOutput-Thisdesignatedflowratevalueisnowusedtocomputetheanalogoutput.

Step8:ComputetheFlowTotalsbySummation-A flow total increment is computed for each flow rate.Thisincrementiscomputedbymultiplyingtherespectiveflowratebyatimebasescalerandthensumming.Thetotalizerformatalsoincludesprovisionsfortotalrollover.

Step9:PulseOutputService-Thepulseoutputisnextupdatedbyscalingthetotalincrementwhichhasjustbeendeterminedbythepulseoutputscalerandsummingittoanyresidualpulseoutputamount.

Step10:UpdateDisplayandPrinterOutput-Theinstrumentfinallyrunsatasktoupdatethevarioustableentries associated with the front panel display and serialoutputs.

Instrument Setup Thesetupispasswordprotectedbymeansofanumericlockoutcodeestablishedbytheuser.Thehelplineandunitsofmeasurepromptsassureeasyentryofparameters.

AnEZSetup function is supported to rapidly configure theinstrument for first time use. A software program is alsoavailable which runs on a PC using a RS-232 Serial forconnectiontotheFlowComputer.Illustrativeexamplesmaybedownloadedinthismanner.

The standard setup menu has numerous subgrouping ofparameters needed for flow calculations. There is a wellconceived hierarchy to the setup parameter list. Selectionsmade at the beginning of the setup automatically affectofferings furtherdown in the lists,minimizingthenumberofquestionsaskedoftheuser.

In the setupmenu, the flow computer activates the correctsetup variables based on the instrument configuration, theflow equation, and the hardware selections made for thecompensation transmitter type, the flow transmitter type,andmeterenhancements(linearization)optionsselected.Allrequiredsetupparametersareenabled.Allsetupparametersnotrequiredaresuppressed.

Alsonotethatinthemenuareparameterselectionswhichhavepreassigned industrystandardvalues.Theunitwillassumethesevaluesunlesstheyaremodifiedbytheuser.

Mostoftheprocessinputvariableshaveavailablea“default”oremergencyvaluewhichmustbeentered.Theseare thevaluesthattheunitassumeswhenamalfunctionisdeterminedtohaveoccurredonthecorrespondinginput.

It is possible to enter in a nominal constant value fortemperature or density, or pressure inputs by placing thedesirednominal value into thedefault valuesand selecting"manual".Thisisalsoaconveniencewhenperformingbenchtoptestswithoutsimulators.

Thesystemalsoprovidesaminimum implementationofan“audittrail”whichtrackssignificantsetupchangestotheunit.This feature is increasingly being found of benefit to usersor simply required by Weights and Measurement Officialsin systems used in commerce, trade, or “custody transfer”applications.

Simulation and Self Checking:Thismodeprovidesanumberofspecializedutilitiesrequiredfor factory calibration, instrument checkoutonstart-up,andperiodiccalibrationdocumentation.

A service password is required to gain access to thisspecializedmodeofoperation.Normallyquality,calibration,andmaintenancepersonnelwill find thismodeofoperationveryuseful.

Manyof these testsmaybeusedduring start-upof a newsystem.Outputsignalsmaybeexercisedtoverifytheelectricalinterconnectsbeforetheentiresystemisputonline.

ThefollowingactionitemsmaybeperformedintheDiagnosticMode:

PrintCalibration/MaintenanceReportViewSignalInput(Voltage,Current,Resistance,Frequency)ExamineAuditTrailPerformaSelfTestPerformaServiceTestViewErrorHistoryPerformPulseOutputCheckout/SimulationPerformRelayOutputCheckout/SimulationPerformAnalogOutputCheckout/SimulationCalibrateAnalogInputsusingtheLearnFeatureCalibrateAnalogOutputusingtheLearnFeatureScheduleNextMaintenanceDate

Notethatacalibrationoftheanaloginput/outputwilladvancethe audit trail counters since it effects the accuracy of thesystem.

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Operation of Steam Trap MonitorIn applications on Saturated Steam, the otherwise unusedCompensationInputmaybeconnectedtoasteamtrapmonitorthatoffersthefollowingcompatibleoutputsignallevels:4mA=trapcold12mA=trapwarmandopen(blowing)20mA=trapwarmandclosed

Innormaloperationasteamtrapiswarmandperiodicallyopensandclosesinresponsetotheaccumulationofcondensate.Acoldtrapisindicationthatitisnotpurgingthecondensate,atrapthatisconstantlyblowingisanindicationthatitisstuckopen. To avoid a false alarm, the ST2 permits the user toprogramadelay,ortimeperiod,whichshouldbeconsiderednormal for the trap tobeeithercold,oropen.AnalarmwillonlybeactivatedifthetrapisdetectedascontinuouslybeingintheabnormalstatesforatimeperiodgreaterthanthisTRAPERRORDELAYtime. The user selects to use the Compensation Input for TrapMonitoringbyselecting“4-20mATRAPSTATUSastheINPUTSIGNALforOTHERINPUT1.

Theuser canprogram theERRORDELAY time inHH:MMformat intoboth theTRAPERRORDELAY(cold traperror)menu and the TRAP BLOWING DELAY (trap stuck open)menu.

The ST2 will warn the operator of a TRAP ERROR whenan abnormal condition is detected. The error can beacknowledged by pressing the ENTER key. However, theproblemmay reassert itself if there is a continued problemwiththesteamtrap.

Inaddition,theeventisnotedintheERRORLOG.

ItisalsopossiblefortheusertoprogramatrapmalfunctionasoneoftheconditionsworthyofaCALLOUTofaproblembyselectingthiserrorintheERRORMASK.

TheData-LoggingoptionoftheST2canalsobeusedtologtheperformanceofthetrapbystoringthe%oftimethetraphasbeencold,and/orblowingopenduringthedataloginterval.

Datalogging OptionThe Datalogging Option for the ST2 permits the user toautomaticallystoresetsofdataitemsasarecordonaperiodicbasis.AdatalogrecordmaybestoredastheresultofeitheraPRINTkeydepression,oranINTERVAL,oraTIMEOFDAYrequestforadatalog.

TheuserdefinesthelistofitemstobeincludedineachdatalogbyselectingtheseinthePRINTLISTmenulocatedwithintheCOMMUNICATIONSSUBMENU.

TheuserselectswhatwilltriggeradatalogrecordbeingstoredinthePRINTINITIATEmenu.ThechoicesarePRINTKEY,INTERVAL,andTIMEOFDAY.

The user can select the datalog store interval in aHH:MMformatinthePRINTINTERVALmenu.

Theusercanalsoselectthestoretimeofdayina24hrHH:MMformatinthePRINTTIMEmenu.

Theusercanalsodefinewhetherhejustwantsthedatastoredintothedatalogger,orifhewantsthedatabothstoredinthedataloggerandsentoutovertheRS232portintheDATALOGONLYmenu.

TheusercandefinetheformathewishesthedatatobeoutputinusingtheDATALOGFORMATmenu.ChoicesarePRINTERandDATABASE.PRINTERformatwilloutputthedatarecordsinaformsuitabletodumptoaprinter.DATABASEformatwilloutputthevaluesinaCSV,orCommaSeparatedVariablewithCarriagereturndelimitingofeachrecord.

Anumberofserialcommandsarealsoincludedtoaccessandmanipulateinformationstoredwithinthedatalogger.AmongtheseRS232commandcapabilitiesarethefollowingactions:

ClearDataLoggerSendallDatainDataloggerSendOnlyNewDatasinceDataloggerwaslastReadSendDataforthedateincludedintherequestSendthecolumnheadingtextfortheCSVdatafieldsSendthecolumnunitsofmeasuretextfortheCSVdata

fieldsStoreonenewrecordintodataloggernowReadNumberofNewRecordsinthedataloggerReadnumberofrecordscurrentlyinthedataloggerRead themaximumnumber of records capacity of the

dataloggerMovePointerBackNrecordsDumpRecordatPointerDumprecordsnewerthanpointerDumpdatafromNrecordsback

ThedataloggeroptionisusedinconjunctionwiththeRS-232portinremotemeteringapplications.

The technical details associated with the serial commandsarelistedinUniversalSerialProtocolManualavailableuponrequest.RS-232 Serial Port

TheFlowComputerhasageneralpurposeRS-232Portwhichmaybeusedforanyoneofthefollowingpurposes:

TransactionPrinting DataLogging RemoteMeteringbyModem ComputerCommunicationLink ConfigurationbyComputer PrintSystemSetup PrintCalibration/MalfunctionHistory

Instrument Setup by PC’s over Serial PortADisketteprogramisprovidedwiththeFlowComputerthatenables theuser to rapidlyconfigure theFlowComputerusinganPersonnelComputer.Includedonthediskettearecommoninstrumentapplicationswhichmaybeusedasastartingpointforyourapplication.Thispermitstheusertohaveanexcellentstartingpointandhelpsspeedtheuserthroughtheinstrumentsetup.

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Operation of Serial Communication Port with Printers TheFlowComputer’sRS-232channelsupportsanumberof operatingmodes.One of thesemodes is intended tosupport operation with a printer inmetering applicationsrequiringtransactionprinting,dataloggingand/orprintingofcalibrationandmaintenancereports.

For transactionprinting, theuserdefines the items tobeincludedintheprinteddocument.Theusercanalsoselectwhatinitiatesthetransactionprintgeneratedaspartofthesetupoftheinstrument.Thetransactiondocumentmaybeinitiatedviaafrontpanelkeydepression.

Indatalogging,theuserdefinestheitemstobeincludedineachdatalogasaprintlist.Theusercanalsoselectwhenorhowoftenhewishesadatalogtobemade.Thisisdoneduringthesetupoftheinstrumentaseitheratimeofdayorasatimeintervalbetweenlogging.

The system setup and maintenance report list all theinstrument setup parameters and usage for the currentinstrument configuration. In addition, the Audit trailinformationispresentedaswellasastatusreportlistinganyobservedmalfunctionswhichhavenotbeencorrected.

Theuserinitiatestheprintingofthisreportatadesignatedpoint in themenu by pressing the print key on the frontpanel.

Operating Serial Communication Port with ModemsTheST2offersanumberofcapabilitiesthatfacilitateitsusewithmodems.TheST2’sRS232portcanbeconnectedtoamodeminordertoimplementaremotemeteringsystemthat uses either the phone companies standard phonelinesorcellular telephonesystem. Inaddition to remotemeter readings, the serial commandsmay also be usedtoexamineand/ormakesetupchangestotheunit,andtocheckforproperoperationorinvestigateproblems.Severalhundredcommandsaresupported.AcompatibleindustrialmodemaccessoryandinterconnectingcablingisofferedintheMPP2400NspecificallydesignedforusewiththeST2.

The ST2 and Modem can be used together to createsystemswithoneormoreofthefollowingcapabilities:1. PolltheST2unitforinformationfromaremotePC.2. Call Out from the ST2 unit to a remote PC on a

scheduledreadingtimeand/orcrisisbasis3. Somecombinationoftheabovetwodescriptionswhere

theunitispolledbyonePCandcallsintotoadifferentPCifaproblemisdetected.

Infact,uptofiveST2unitscansharethesamemodem.EachST2musthaveauniqueDEVICEID.Thismultidroppingofflowcomputersonasinglemodemispopularwhenthereareseveralflowcomputersmountedneareachother.

In most applications using modem communications, theST2’sRS232USAGEisfirstsetequaltoMODEM.EachST2onasharedmodemcableisgivenauniqueserialdeviceaddressorDEVICEID.TheBAUDRATEiscommonlysetto2400,thePARITYsettoNONE,andtheHANSHAKINGsettoNONEtocompletethebasicsetup.TheremotePC’scommunicationsettingsarechosentomatchthese.

The level of complexity of the Supetrol-2 to Modemconnectioncanrangefromsimpletomorecomplex.

InasimplesystemaremotePCwillcallintothetelephonenumberofthemodem.Themodemwillanswerthecall,andestablishaconnectionbetweentheST2andtheremotePC.Anexchangeof informationcannowoccur.TheST2willactasaslaveandrespondtocommandsandrequestsforinformation fromtheremoteMASTERPC.TheMASTERPCwillendtheexchangebyhandingup.

However, it is more common that the ST2 will be usedtocontrol themodem. In theseapplications the followingcommunicationmenusettingswouldbeused: RS232USAGE=MODEM DEVICE ID, BAUD RATE, PARITY, and

HANDSHAKINGareset MODEMCONTROL=YES DEVICE MASTER = YES (When multidropping

several ST2's, only one unit will be the DEVICEMASTER)

MODEMAUTOANSWER=YES(Thisinstructstheunittoanswerincomingcalls)

HANGUPIFINACTIVE=YES(Thisinstructstheunittohangupthelineifnoactivitiesoccurwithinseveralminutes).

Amorecomplexformofaremotemeteringsystemcanbeimplementedwhere theST2will initiatea call to contacttheremotePCatascheduledtimeand/orintheeventofaproblemthathasbeendetected.IntheseapplicationstheST2hasadditionalsetupcapabilitiesincluding: TheST2musthaveauniqueidentifierassignedtoit

(usingtheTAGNUMBER) CallOutTelephonenumbermustbeenteredinthe

CALLOUTNUMBER Thescheduledcallouttimeforthedailyreadingmust

beenteredinCALLOUTTIME Adecisionmustbemadewhethertheunitwillbeused

tocallonerror(s)inCALLONERROR Theparticularerrorconditionstocalloutonmustbe

definedintheERRORMASK TheNUMBEROFREDIALStobeattemptediflineis

busymustbeenteredinthatcell HANGUPIFINACTIVE=YESwilldisconnectthecall

ifremotecomputerdoesnotrespond.

Consult theUniversalSerialCommandsUserManual fordetailsontheindividualcommandssupportedbytheST2.ContacttheFlowApplicationsGroupforadiscussionontheremotemeteringsystemcapabilitiesyouareconsidering.

NOTE: Somemodems can be configured in advance toanswer incoming calls, terminate phone connections ifcommunicationsislost.InsuchapplicationstheremaybenoneedfortheST2tobefunctioningto“control”themodem.SettingtheRS233USAGE=COMPUTERwilllikelywork.

RS-485 Serial Port (optional)The RS-485 serial port can be used for accessing flowrate,total,pressure,temperature,densityandalarmstatusinformation.Theportcanalsobeusedforchangingpresetsandacknowledgingalarms.

ST2 Flow Computer

8

2. Installation

2.1 General Mounting Hints:

TheST2FlowComputershouldbelocatedinanareawithaclean,dryatmospherewhichisrelativelyfreeofshockandvibration.Theunitisinstalledina5.43"(138mm)wideby2.68"(68mm)highpanelcutout.(seeMountingDimensions)TomounttheFlowComputer,proceedasfollows:

a.Preparethepanelopening.b.Slidetheunitthroughthepanelcutoutuntiltheittouchesthepanel.c.Installthescrews(provided)inthemountingbracketandslipthebracketovertherearofthecaseuntilitsnapsinplace.

d.Tightenthescrewsfirmlytoattachthebezeltothepanel.3in.lb.oftorquemustbeappliedandthebezelmustbeparalleltothepanel.

NOTE: TosealtoNEMA4X/IP65specifications,suppliedbezelkitmustbeusedandpanelcannotflexmorethan.010".

Whentheoptionalbezelkitisused,thebezeladaptormustbesealedtothecaseusinganRTVtypesealertomaintainNEMA4X/IP65rating.

General Mounting Hints

Mounting Procedure

NEMA4X / IP65 Specifications

ST2ST2BezelAdaptor

Gasket

MountingBracketMountingBracket

Standard Mounting Bezel Kit Mounting

Dimensions

Dotted Line Shows Optional Bezel Kit

PanelCutout

5.43(138)

2.68(68)

Dimensions are in inches (mm)

5.67 (144)

2.83(72)

3.43(87)

6.18

6.15(156) 0.5

(13)0.28 (7.2)

0.4 (10)

2.2 Mounting Diagrams:

ST2 Flow Computer

9

1.10(28)

1.10(28)

7.8 (198)

4.72

(120

)

0.59(15)

0.75” Conduit Knockouts(5 places)

1.06(27)

9.4 (238)

7.3

(184

)2.

34 (5

9.5)

8.4 (213.4)

4.13 (105)

2.33 (59)0.385(9.8)

Security TagProvisions

0.625”ø 0.75”ø 5 places

1.10(28)

1.10(28)

1.10(28)

1.10(28)

1.10(28)

1.10(28)

Wall Mount (mountingoptionW)2.2 Mounting Diagrams:(continued)

NEMA4 Wall Mount (mountingoptionN)

ST2 Flow Computer

10

Explosion Proof Mount (mountingoptionX)2.2 Mounting Diagrams:(continued)

Explosion Proof Mount (mountingoptionE)

9.31(236.5)

12.06(306.3)

3.81(96.8)

6.56(166.6)

.28 ±.02(7.1 ±.5)

1.31(33.3)

8.88(225.5)3.5

(88.9)

10.19(258.8)

2.5(63.5)

2.5(63.5)

5.09(129)

3.0(76.2)

1/4" - 20UNC-2BTAP x 5/16" DEEP(6) HOLES CENTEREDON THREE SIDES FORMOUNTING

1/2"- 14 NPT PLUGS(2 PLACES)

10.6(269.2)

1/4" - 20UNC-2BTAP x 5/16" DEEP(6) HOLES CENTEREDON THREE SIDES FORMOUNTING

3.5(88.9)

3(76.2)

2.13(54)

1.75(44.5)

5.1(129.5)

.25(6.35).5

(12.7)

4.63(117.5)

10.19(258.8)

3.13(79.4)

3.13(79.4)

3(76.2)

.5(12.7)

ST2 Flow Computer

11

3.1 Steam MassMeasurements:Aflowmetermeasures theactualvolumeflow inasteam line. A temperatureand/orpressuresensorisinstalledtomeasuretemperatureand/orpressure.

Calculations:• Density and mass flow are calculated using the steam tables stored in the flowcomputer.

• With square law device measurement the actual volume is calculated from thedifferentialpressure,takingintoaccounttemperatureandpressurecompensation.

• Saturatedsteamrequireseitherapressureortemperaturemeasurementwiththeothervariablecalculatedusingthesaturatedsteamcurve.

• OptionalsteamtrapmonitoringusingCompensationInput1.

Input Variables: Superheated Steam: Flow,temperatureandpressure Saturated Steam: Flow,temperatureorpressure

Output Results:• DisplayResults MassorVolumeFlowRate,ResettableTotal,Non-ResettableTotal,Temperature,

Pressure,Density(optional:peakdemand,demandlasthour,time/datestamp)• AnalogOutput Mass or Volume Flow Rate, Temperature, Pressure Density, Peak Demand,

DemandLastHour• PulseOutput MassorVolumeTotal• RelayOutputs Mass or Volume Flow Rate , Total, Pressure, Temperature, Alarms, Peak

Demand,DemandLastHour

Applications:Monitoring mass flow and total of steam. Flow alarms are provided via relays anddataloggingisavailableviaanalog(4-20mA)andserialoutputs.

STEAM MASS

Steam MassIllustration

3. Applications

Flowmeter TemperatureTransmitter

PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter

Mass Flow

MassFlow=volumeflow•density(T,p)

Calculations

** or Steam Trap Monitor


ST2 Flow Computer

12

3.2 Steam HeatMeasurements:Aflowmetermeasures theactualvolumeflow inasteam line. A temperatureand/orpressuresensorisinstalledtomeasuretemperatureand/orpressure.

Calculations:• Density,massflowandheatflowarecalculatedusingthesteamtablesstoredintheflowcomputer.TheheatisdefinedastheenthalpyofsteamunderactualconditionswithreferencetotheenthalpyofwateratT=0°C.



• Optionalsteamtrapmonitoringusingcompensationinput.


Output Results:• DisplayResults Heat, Mass or Volume Flow Rate, Resettable Total, Non-Resettable Total,

Temperature, Pressure, Density (optional: peak demand, demand last hour,time/datestamp)

• AnalogOutput Heat, Mass or Volume Flow Rate, Temperature, Pressure, Density, Peak

Demand,DemandLastHour• PulseOutput Heat,MassorVolumeTotal• RelayOutputs Heat,MassorVolumeFlowRate,Total,Pressure,TemperatureAlarms,Peak


Applications:Monitoringheatflowandtotalheatofsteam.Flowalarmsareprovidedviarelaysanddataloggingisavailableviaanalog(4-20mA)andserialoutputs.

STEAM HEAT

Heat Flow

HeatFlow=Volumeflow•density(T,p)•Sp.Enthalpyofsteam(T,p)

Calculations

Steam HeatIllustration

TemperatureTransmitter

PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter

Orifice Platewith DP Transmitter


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter



ST2 Flow Computer

13

3.3 Steam Net HeatMeasurements:Aflowmetermeasures theactual volumeflow inasteam line. A temperatureandapressuresensorareinstalledtomeasuretemperatureand/orpressure.Allmeasurementaremadeonthesteamsideofaheatexchanger.

Calculations:• Density,massflowandnetheatflowarecalculatedusingthesteamtablesstoredintheflowcomputer.Thenetheatisdefinedasthedifferencebetweentheheatofthesteamandtheheatofthecondensate.Forsimplificationitisassumedthatthecondensate(water)hasatemperaturewhichcorrespondstothetemperatureofsaturatedsteamatthepressuremeasuredupstreamoftheheatexchanger.



• Optionalsteamtrapmonitoringusingcompensationinput.



Temperature, Pressure, Density, (optional: peak demand, demand last hour,time/datestamp)




Applications:Monitoringthethermalenergywhichcanbeextractedbyaheatexchangertakingintoaccount the thermal energy remaining in the returned condensate. For simplificationit is assumed that the condensate (water) has a temperature which corresponds tothe temperature of saturated steam at the pressure measured upstream of the heatexchanger.

STEAM NET HEAT

Net Heat Flow

NetHeatFlow=Volumeflow•density(T,p)•[ED(T,p)–EW(TS(p))]

ED = SpecificenthalpyofsteamEw = SpecificenthalpyofwaterTS(p) = Calculatedcondensationtemperature (=saturatedsteamtemperatureforsupplypressure)

Calculations

Steam Net HeatIllustration


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter

Water

Steam


ST2 Flow Computer

14

3.4 Steam Delta HeatMeasurements:Measuresactualvolumeflowandpressureofthesaturatedsteaminthesupplypipingas well as the temperature of the condensate in the downstream piping of a heatexchanger.

Calculations:• Calculatesdensity,massflowaswellasthedeltaheatbetweenthesaturatedsteam(supply)andcondensation(return)usingphysicalcharacteristictablesofsteamandwaterstoredintheflowcomputer.


• Thesaturatedsteamtemperatureinthesupplylineiscalculatedfromthepressuremeasuredthere.

Input Variables: Supply: Flowandpressure(saturatedsteam) Return: Temperature(condensate)






Applications:Calculatethesaturatedsteammassflowandtheheatextractedbyaheatexchangertakingintoaccountthethermalenergyremaininginthecondensate.

STEAM DELTA HEAT

Delta Heat Flow

NetHeatFlow=Volumeflow•density(p)•[ED(p)–EW(T)]

ED = SpecificenthalpyofsteamEw = Specificenthalpyofwater

Note:Assumesaclosedsystem.

Calculations

Steam Delta HeatIllustration

PressureTransmitter Flowmeter


PRINT5

0 –TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

Water

SaturatedSteam

ST2 Flow Computer

15

3.5 Corrected Gas VolumeMeasurements:Aflowmetermeasurestheactualvolumeflowinagasline.Temperatureandpressuresensorsareinstalledtocorrectforgasexpansioneffects.

Calculations:• CorrectedVolumeiscalculatedusingtheflow,temperatureandpressureinputsaswellasthegascharacteristicsstoredintheflowcomputer(see"FLUIDDATA"submenu).Use the"OTHERINPUT"submenu todefine reference temperatureand referencepressurevaluesforstandardconditions.

Output Results:• DisplayResults CorrectedVolumeorActualVolumeFlowRate,ResettableTotal,Non-Resettable

Total,Temperature,Pressure,Density(optional:peakdemand,demandlasthour,time/datestamp)

• AnalogOutput CorrectedVolumeorActualVolumeFlowRate,Temperature,Pressure,Density,

PeakDemand,DemandLastHour• PulseOutput CorrectedVolumeorActualVolumeTotal• RelayOutputs CorrectedVolumeorActualVolumeFlowRate,Total,pressure,Temperature

Alarms,PeakDemand,DemandLastHour

Applications:Monitoringcorrectedvolumeflowandtotalofanygas.Flowalarmsareprovidedviarelaysanddataloggingisavailableviaanalog(4-20mA)andserialoutputs.

CORRECTEDGAS VOLUME

Volume Flow

Pulse Input; Average K-Factor

inputfrequency•timescalefactor VolumeFlow= K-Factor

Analog Input; Linear

VolumeFlow=%input•FullScaleFlow

Corrected Volume Flow

P Tref Zref CorrectedVolumeFlow=VolumeFlow• • • Pref T Z

Calculations

CorrectedGas VolumeIllustration


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter

ST2 Flow Computer

16


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter

Orifice Platewith DP Transmitter


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter

3.6 Gas MassMeasurements:Aflowmetermeasurestheactualvolumeflowinagasline.Temperatureandpressuresensorsareinstalledtomeasuretemperatureandpressure.

Calculations:• Density andmass flow are calculated using gas characteristics stored in the flowcomputer.



Pressure,Density(optional:peakdemand,demandlasthour,time/datestamp)• AnalogOutput Mass orVolumeFlowRate,Temperature,Pressure,Density,PeakDemand,

DemandLastHour• PulseOutput MassorVolumeTotal• RelayOutputs MassorVolumeFlowRate,Total,Pressure,Temperature,DensityAlarms,Peak


Applications:Monitoringmassflowandtotalofgas.Flowalarmsareprovidedviarelaysanddataloggingisavailableviaanalog(4-20mA)andserialoutputs.

GAS MASS

Mass Flow

P Tref Zref MassFlow=ActualVolumeFlow•ρref• • • Pref T Z

ρref = ReferencedensityTref = ReferencetemperaturePref = ReferencepressureZref = ReferenceZ-factor

Calculations

Gas MassIllustration

ST2 Flow Computer

17


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

PressureTransmitter

3.7 Gas Combustion HeatMeasurements:Aflowmetermeasurestheactualvolumeflowinagasline.Temperatureandpressuresensorsareinstalledtomeasuretemperatureandpressure.

Calculations:• Density,massflowandcombustionheatarecalculatedusinggascharacteristicsstoredintheflowcomputer.







Applications:Calculatetheenergyreleasedbycombustionofgaseousfuels.

GAS COMBUSTIONHEAT

Combustion Heat Flow

P Tref Zref CombustionEnergy=C•ρref•Q• • • Pref T Z

C = Specificcombustionheatρref = ReferencedensityQ = Volumeflow

Calculations

Gas CombustionHeat

ST2 Flow Computer

18

3.8 Corrected Liquid VolumeMeasurements:Aflowmetermeasurestheactualvolumeflowinaliquidline.Atemperaturesensorisinstalledtocorrectforliquidthermalexpansion.Apressuresensorcanbeinstalledtomonitorpressure.Pressuremeasurementdoesnotaffectthecalculation.

Calculations:• Corrected Volume is calculated using the flow and temperature inputs as well asthe thermal expansion coefficient stored in the flow computer (see "FLUIDDATA"submenu).Usethe"OTHERINPUT"submenutodefinereferencetemperatureanddensityvaluesforstandardconditions.

Output Results:• DisplayResults Corrected Volume and Actual Volume Flow Rate, Resettable Total, Non-

Resettable Total, Temperature, Pressure, Density (optional: peak demand,demandlasthour,time/datestamp)

• AnalogOutput Corrected Volume and Actual Volume Flow Rate, Temperature, Pressure,

Density,PeakDemand,DemandLastHour• PulseOutput CorrectedVolumeandActualVolumeTotal• RelayOutputs CorrectedVolumeandActualVolumeFlowRate,Total,Pressure,Temperature


Applications:Monitoringcorrectedvolumeflowandtotalofanyliquid.Flowalarmsareprovidedviarelaysanddataloggingisavailableviaanalog(4-20mA)andserialoutputs.

CorrectedLiquid Volume

Volume Flow

Pulse Input; Average K-Factor

inputfrequency•timescalefactor VolumeFlow= K-Factor

Analog Input; Linear

VolumeFlow=%input•FullScaleFlow

Corrected Volume Flow

CorrectedVolumeFlow=vol.flow•(1-α•(Tf-Tref))2

α = Thermalexpansioncoefficient•10-6

Calculations

CorrectedLiquid VolumeIllustration


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

OptionalPressure

Transmitter

ST2 Flow Computer

19

3.9 Liquid Mass Measurements:Actual volume flow is measured by the flow element (DP transmitter, Flowmeter).Temperature ismeasuredby the temperature transmitter.Apressure transmitter canbeusedtomonitorpressure.Pressuremeasurementdoesnotaffectthecalculation.Adensitytransmittermaybeusedinplaceofatemperaturetransmitterfordirectdensitymeasurement.

Calculations:• Thedensityandmassflowarecalculatedusingthereferencedensityandthethermalexpansioncoefficientoftheliquid(see"FLUIDDATA"submenu)


Pressure,Density(optional:peakdemand,demandlasthour,time/datestamp)• AnalogOutput MassorVolumeFlowRate,Temperature,Pressure,Density,PeakDemand,

DemandLastHour• PulseOutput MassorVolumeTotal• RelayOutputs MassorVolumeFlowRate,Total,Temperature,Pressure,DensityAlarms,Peak


Applications:Monitoringmassflowandtotalofanyliquid.Flowalarmsareprovidedviarelaysanddataloggingisavailableviaanalog(4-20mA)andserialoutputs.

Liquid Mass

Liquid MassIllustration

Volume Flow

Ascalculatedinsection3.8

Mass Flow

MassFlow=volumeflow•(1-a•(T1-Tref))2•ref.density

α = Thermalexpansioncoefficient•10-6

Calculations

NOTE:A density transmitter may be used for direct density measurement.


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

OptionalPressure

Transmitter T1

ST2 Flow Computer

20

3.10 Liquid Combustion HeatMeasurements:Actual volume flow is measured by the flow element (DP transmitter, Flowmeter).Temperatureismeasuredbythetemperaturetransmitter.Apressuretransmittercanbeusedtomonitorpressure.Pressuremeasurementdoesnotaffectthecalculation.

Calculations:• Thedensity,massflowandcombustionheatarecalculatedusingthefluidcharacteristicsstoredintheflowcomputer.(see"FLUIDDATA"submenu)

Output Results:• DisplayResults CombustionHeat,MassorVolumeFlowRate,ResettableTotal,Non-Resettable

Total,Temperature,Pressure,Density(optional:peakdemand,demandlasthour,time/datestamp)

• AnalogOutput CombustionHeat,MassorVolumeFlowRate,Temperature,Pressure,Density,

PeakDemand,DemandLastHour• PulseOutput CombustionHeat,MassorVolumeTotal• RelayOutputs CombustionHeat,Mass orVolumeFlowRate,Total,Temperature,Pressure


Applications:Calculatetheenergyreleasedbycombustionofliquidfuels

LIQUID COMBUSTION HEAT

Liquid Combustion Heat Illustration

Volume Flow


Heat Flow

HeatFlow=C•volumeflow•(1-α •(T1-Tref))2•ref.density

α = Thermalexpansioncoefficient•10-6C = Specificcombustionheat

Calculations


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

OptionalPressure

Transmitter T1

ST2 Flow Computer

21

3.11 Liquid Sensible HeatMeasurements:Actual volume flow is measured by the flow element (DP transmitter, Flowmeter).Temperatureismeasuredbythetemperaturetransmitter.Apressuretransmittercanbeusedtomonitorpressure.Pressuremeasurementdoesnotaffectthecalculation.

Calculations:• Thedensity,massflowandsensibleheatarecalculatedusingthefluidcharacteristicsstoredintheflowcomputer.(see"FLUIDDATA"submenu)

Output Results:• DisplayResults SensibleHeat,MassorVolumeFlowRate,ResettableTotal,Non-Resettable

Total, Temperature, Pressure, Density (optional: peak demand, demand lasthour,time/datestamp)

• AnalogOutput SensibleHeat,Mass or VolumeFlowRate,Temperature, Pressure,Density,

PeakDemand,DemandLastHour• PulseOutput SensibleHeat,MassorVolumeTotal• RelayOutputs SensibleHeat,MassorVolumeFlowRate,Total,Temperature,PressureAlarms,

PeakDemand,DemandLastHour

Applications:Calculatetheenergystoredinacondensatewithrespecttowaterat32°F(0°C).

LIQUID SENSIBLE HEAT

Liquid Sensible Heat Illustration

Volume Flow


Heat Flow

HeatFlow=C•volumeflow•(1-α •(T1-Tref))2•ref.density•(T1-32)

α = Thermalexpansioncoefficient•10-6C = Specificheat

Calculations


PRINT5

0 –

TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

OptionalPressure

Transmitter T1

ST2 Flow Computer

22

3.12 Liquid Delta HeatMeasurements:Actual volume flow is measured by the flow element (DP transmitter, Flowmeter).Temperature of the supply and return lines are measured by the temperaturetransmitters.

Calculations:• Thedensity,massflowanddeltaheatarecalculatedusingvaluesoftheheatcarryingliquidstoredintheflowcomputer.(see"FLUIDDATA"submenu)


Temperature1, Temperature2, Delta Temperature, Density, (optional: peakdemand,demandlasthour,time/datestamp)

• AnalogOutput Heat, Mass or Volume Flow Rate, Temperature1, Temperature2, Delta

Temperature,Density,PeakDemand,DemandLastHour• PulseOutput Heat,MassorVolumeTotal• RelayOutputs Heat,MassorVolumeFlowRate,Total,TemperatureAlarms,PeakDemand,

DemandLastHour

Applications:Calculatetheenergywhichisextractedbyaheatexchangerfromheatcarryingliquids.

LIQUID DELTA HEAT

Liquid Delta Heat Illustration

Water

Heat=VolumeFlow•ρ(T1)•[h(T2)–h(T1)]

Other heat carrying liquids

Heat=C•volumeflow•(1-α •(T1-Tref))2• ρref• (T2 - T1)

WHERE:DeltaT>LowDeltaTCutoff

α = Thermalexpansioncoefficient•10-6C = Meanspecificheatρ(T1) = DensityofwaterattemperatureT1h(T1) = SpecificenthalpyofwaterattemperatureT1h(T2) = SpecificenthalpyofwaterattemperatureT2ρref = ReferencedensityTref = Referencetemperature

Calculations

Flowmeter

T2TemperatureTransmitter

PRINT5

0 –TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

T1TemperatureTransmitter

Water

Hot

Cold

Meter Location = COLD

ST2 Flow Computer

23

3.13 Steam – Condensate HeatMeasurements:Actual condensate volume flow is measured by the flow element (DP transmitter,Flowmeter). Condensate temperature ismeasured by the temperature transmitter.Apressuretransmitterisusedtomonitorsteampressure.

Calculations:• The condensate density, volume flow, mass flow and saturated steam energy -condensateenergyare calculatedusing the fluid characteristics stored in the flowcomputer.(see"FLUIDDATA"submenu)

Output Results:• DisplayResults Steam–CondensateHeat,CondensateMassandVolumeFlowRate,Resettable

Total, Non-Resettable Total, Temperature, Pressure, Condensate Density(optional:peakdemand,demandlasthour,time/datestamp)

• AnalogOutput NetHeatFlow,MassandVolumeFlowRate,CondensateTemperature,Steam

Pressure,CondensateDensity,PeakDemand,DemandLastHour• PulseOutput NetHeat,MassorVolumeTotal• RelayOutputs NetHeat,MassorVolumeFlowRate,Total,CondensateTemperature,Steam

PressureAlarms,PeakDemand,DemandLastHour

Applications:Calculatetheenergystoredinsteam–theenergyinreturnedcondensatewater.

STEAM – CONDENSATE ENERGY METER

Steam – Condensate Heat Illustration

Volume Flow


Net Heat Flow

Calculations

Flowmeter

PressureTransmitter

PRINT5

0 –TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

DENS9

SaturatedSteam

Water


T1Condensate

Steam

NetHeatFlow=condensatevolumeflow•condensatedensity•[enthalpysteam(Pf)–enthalpywater(Tf)]

ST2 Flow Computer

24

4. WIRING

4.1 Terminal Designations

*In stacked DP mode, terminal 2 is used for Iin (+) DP Hi Range. Terminal 3 is used for Iin (+) DP Lo Range.

** In trap monitor mode, terminal 7 is used for Iin (+) from trap monitor.

Two Relay Terminations Three Relay Option Terminations

13PULSE OUTPUT (+)PULSE OUTPUT (-)

ANALOG OUTPUT COMMON (-)ANALOG OUTPUT 2 (+)

RLY1

RLY2

AC LINEAC LINE24

18 COM19202122

23

NCNCCOMNO

141516

17 NO

POWER INDC (-)DC (+)

PULSE IN DC OUTPUT

COMMONRTD EXCIT (+)RTD SENS (+)RTD SENS (-)

89101112

2345

67

1

TEMPERATURE

Iin (+)

Vin (+)Iin (+)

IN

IN

FLOW

RTD EXCIT (+)RTD SENS (+)RTD SENS (-)

DC OUTPUTPRESSURE

(TEMP 2)

Iin (+) IN

ANALOG OUTPUT 1 (+)

- - - - - - - - - -*

**

13PULSE OUTPUT (+)PULSE OUTPUT (-)

ANALOG OUTPUT COMMON (-)ANALOG OUTPUT 2 (+)

RLY1

AC LINEAC LINE24

18 COM.19202122

23

141516

17 N.O.

POWER INDC (-)DC (+)

PULSE INDC OUTPUT

COMMONRTD EXCIT (+)RTD SENS (+)RTD SENS (-)

89

101112

234567

1

TEMPERATURE

Iin (+)

Vin (+)Iin (+)

IN

IN

FLOW

RTD EXCIT (+)RTD SENS (+)RTD SENS (-)

DC OUTPUTPRESSURE

(TEMP 2)

Iin (+) IN

ANALOG OUTPUT 1 (+)

- - - - - - - - - -

RLY1

RLY3COM.N.O. RLY3

RLY2COM.N.O. RLY2

*

**

ST2 Flow Computer

25

4.2 Typical Wiring Connections:

4.2.1 Flow Input

4.2.2 Stacked DP Input

+

–

+

–

Mag10 mV –

Pulse3-30 V –

+

Analog 4-20 mA Transmitter(i.e. DP Transmitter)

Analog Voltage Transmitter(i.e. Turbine Flowmeter

with F/V Converter)

10 mV or 100 mV Signal(i.e. Turbine Flowmeterwith Magnetic Pickup)

3-30 VDC Pulses(i.e. Positive Displacement

Flowmeter)

0-5VDC

4-20mA

1234

1234

123

(+) 24 V Out

4-20 mA In

(+) V In

Common

Pulse In

Common

(+) 24 V OutPulse In

Common

1234

+

–

High RangeDP Transmitter

4-20mA

+

–

Low RangeDP Transmitter

4-20mA

(+) 24 V Out4-20 mA In (DP Hi Range)4-20 mA In (DP Lo Range)

123

4.2.3 Pressure Input

ST2 Flow Computer

26

4.2.4 Temperature Input

4.2.5 Temperature 2 Input

*

*Oroptionalsteamtrapmonitoringinputinsomesaturatedsteamapplications.

ST2 Flow Computer

27

Hazardous Area Safe Area

4-20mATemperatureTransmitter

4.3.3 Temperature Input

Common

4-20mAIn24VOut

CommonRTDExcit(+)RTDSens(+)RTDSens(–)

3-WireRTD

MTL4755ac

Hazardous Area Safe Area4.3.2 Pressure Input

4.3 Wiring In Hazardous Areas

Hazardous Area Safe AreaDPTransmitter 24VOut

4-20mAInCommon

4.3.1 Flow Input

Examples using MTL787S+ Barrier (MTL4755ac for RTD)

4-20mAPressureTrans-mitter

Common24VOut

4-20mAIn

ST2 Flow Computer

28

5. UNIT OPERATION5.1 Front Panel Operation Concept for Operate Mode

HELPOn-linehelpisprovidedtoassisttheoperatorinusingthisproduct.ThehelpisavailableduringOPERATEandSETUPmodessimplybypressingtheHELPkey.TheHELPkeyisusedtoenterdecimalswhenenteringnumericvalues.

VIEWING PROCESS VALUESIntheOPERATEmode,severalkeyshaveaspecial,directaccessfeature,todisplayanitemofinterest(i.e.RATE,TOTAL,ALARMSETPOINT,etc.).Pressthekeytoviewyourchoice.Pressthe∆ ∇keystoviewotheritemsinthatgroup.

CLEARING TOTALIZERToclearthetotalizers,youmustpresstheTOTALFunctionKeytoselectthetotalizergroup.Pressthe∆ ∇keystoselectthedesiredtotalizer.Oncethedesiredtotalizerisdisplayed,presstheCLEARkeytoresetthetotal.Theoperatorwillbepromptedtoverifythisactionandtoenterapasswordiftheunitislocked.

CLEARING GRAND TOTALToclearthegrandtotalizers,youmustpresstheGRANDFunctionKeyandusethe∆ ∇ keystoselectthedesiredgrandtotal.Oncethegrandtotalisselected,presstheCLEARkeytoresetthegrandtotal.Theoperatorwillbepromptedtoverifythisactionandtoenterservicepasswordiftheunitislocked.

ALARM SETPOINT KEYSALARM1&ALARM2keysareusedtoviewand/orchangethealarmsetpoints.Toviewthesetpoints,simplypressthedesiredAlarmsetpointkeyonce.Rapidlypressthealarmsetpointkeysseveraltimesfordirecteditingofthealarmsetpoints.Theoperatorwillbepromptedtoenterpasswordiftheunitislocked.PressCLEAR,"###",ENTERtoentervalue.

SCROLLPresstheScrollkeytoactivatethescrollingdisplaylist.Seesection6tosetupthedisplaylist.

PRINTThePRINTkeyisusedtoprintondemandwhenthecommunicationportissetforprinter.WhenthePRINTkeyispressed,auserdefinedlistofdata(TOTAL,RATE,ALARMSETPOINT,etc.)issenttotheRS-232port.Atimedmessageof"PRINTING"willbedisplayedtoacknowledgetheprintrequest.

MENU KEYTheMENUkeyisusedtoview/entertheInstrumentSetupandServiceMode.PresstheMENUkeytoaccesstheSetupandServicemodes.(Seesection6forSetupmode).TheMENUkeyisalsousedfora"Pop-Back"function.WhentheMENUkeyispressed,thedisplaywill"Pop-Back"tothecurrentsubmenuheading.MultipleMENUkeydepressionswillreturntheunittotheOperateMode.

ACKNOWLEDGING ALARMSMostalarmmessagesareself-clearing.PresstheENTERkeytoacknowledgeandclearlatchingalarms.NOTE:Somekeysandfunctionsarepasswordprotected.Enterthepasswordtogain

access.Thepasswordsarefactorysetasfollows: Private =1000,Service =2000

How To Use On-Line Help

How To ViewProcess Values

How To Clear The Totalizer

How To Clear The Grand Total

How To Enter Alarm Setpoints

How To Activate TheScrolling Display List

How To Use The Print Key

How To Use The Menu Key

How To Acknowledge Alarms

ST2 Flow Computer

29

5.2 General Operation

Thisinstrumentisusedprimarilytomonitorflowrateandaccumulatedtotal.Theinputscanbesoftwareconfiguredforavarietyofflowmeter,temperatureandpressuresensors.Thestandardoutputtypesinclude:Pulse,Relay,AnalogandRS-232Theunitcandisplaytheflowrate, totalandprocessvariables.RS-485 isanavailableoption forasecondcommunicationchannel.

5.3 Password Protection

AfteranPrivateand/orServiceCodeisenteredinthe"SystemParameters"SubmenuGroup.(seesection6.3,PrivateCodeandServiceCodesub-menus),theunitwillbelocked.Theunitwillprompttheuserforthepasswordwhentryingtoperformthefollowingfunctions:

ClearTotalsClearGrandTotals(servicecoderequired)EditaSetupMenuItemEditAlarmSetpoints(ALARM1&ALARM2Keys)

TheServiceCodeshouldbereservedforservicetechnicians.TheServiceCodewillallowaccesstorestrictedareasoftheServiceandTestmenus.Changesintheseareasmayresultinlostcalibrationinformation.

5.4 Relay Operation

Tworelayalarmoutputsarestandard.Therelaysmayalsobeusedforpulseoutputs.Therelayscanbeassignedtotripaccordingtovariousrate,total,temperatureorpressurereadings.Therelayscanbeprogrammedfor low/highalarms,latchorunlatch,orasrelaypulseoutputs.ALARMSETPOINT1(RLY1)andALARMSETPOINT2(RLY2)areeasilyaccessiblebypressingtheALARM1orALARM2keyonthefrontpanel.

5.5 Pulse Output

Theisolatedpulseoutputismenuassignabletoanyoftheavailabletotals.Thepulseoutputdurationandscalingcanbesetbytheuser.Thepulseoutputisidealforconnectingto remote totalizers or other devices such as a PLC. See section 1.2 for electricalspecifications.

5.6 Analog Outputs

Theanalogoutputsaremenuassignabletocorrespondtoanyoftheprocessparameters.Theoutputsaremenuselectablefor0-20mAor4-20mA.Theanalogoutputsareidealfor"trend"trackingusingstripchartrecordersorotherdevices.

5.7 Function Keys; Display Grouping

TOTAL Pressthe keys to view HEAT TOTAL, MASS TOTAL, CORRECTEDVOLUMETOTAL,VOLUMETOTAL

GRANDTOTAL Pressthe keys to view GRAND HEAT, GRAND MASS, GRANDCORRECTEDVOLUME,GRANDVOLUME

RATE Pressthe keys to view HEAT, MASS , CORRECTED VOLUME,VOLUME,PEAKDEMAND,DEMANDLASTHOUR

TEMPERATURE Pressthe keystoviewTEMPERATURE1,TEMPERATURE2,DELTATEMPERATURE,DENSITY

PRESSURE Pressthe keystoviewPRESSURE,DIFFERENTIALPRESSURE,,Y1,SPECIFICENTHALPY

TIME Pressthe keystoviewTIME/DATE,PEAKTIME/DATE,ACCUMULATIVEPOWERLOSSTIME,TIMEOFLASTPOWEROUTAGE,TIMEPOWERWASLASTRESTORED

GeneralOperation

Password Protection

Relay Operation

Pulse Output

Analog Outputs

Function KeysDisplay Grouping

ST2 Flow Computer

30

5.8 RS-232 Serial Port OperationTheRS-232 serial port can be used for programming (using the Setup Disk) or forcommunicatingtoprintersandcomputersintheOperatingMode(RunMode).Enhancedusesincluderemotemeteringbymodem.

5.8.1 PC Communications:TheSetupDiskalsoallowstheusertoquerytheunitforoperatingstatussuchasFlowRate,FlowTotal,Temperature,Pressure,AlarmSetpoints,etc.InthismodeofoperationtheRS232portisassumedconnectedtoacomputer.TheST2willactasaslaveandanswerrequestsfromthePC.SeetheUniversalProtocolUsersManualforacompletelistingofthecommandssetsupported.ADDE/OPCServerisalsoavailableforuseinexchanginginformationwithDDEClientssuchasSpreadSheets,DatabasePrograms,andHMIsoftware.

5.8.2 Operation of RS-232 Serial Port with Printers:TransactionPrintingFortransactionprinting,theuserdefinestheitemstobeincludedintheprinteddocument(see section 6.13 COMMUNICATION, Print List). The transaction document can beinitiatedbypressingthePRINTkey.

DataLoggingTheusercanselectwhen(timeofday)orhowoften(printinterval)thedatalogistobemade(seesection6.13COMMUNICATION,PrintInitiate).InformationwillbestoredtothedataloggerandoptionallyoutputtotheRS-232port.

SystemSetupandMaintenanceReportThesystemsetupandmaintenancereportlistsalloftheinstrumentsetupparametersandusageforthecurrentinstrumentconfiguration.Theaudittrailinformationandastatusreport isalsoprinted.Thisreport is initiatedintheServiceandAnalysisGroup(seesection6.15SERVICE&ANALYSIS,PrintSystemSetup).

5.8.3 Operation of RS-232 Serial Port with ModemsInthismodeofoperationtheRS232portisassumedtobeconnectedtoaMPP2400Nor similar telephonemodem.TheST2 is responsible for communicating toa remotecomputerthroughthemodemtoperformsuchactionsas:Answerincomingcalls,processrequestsforinformationoractionitemsordatalogcontentsorchangesetupparameters,calloutdailyreadingstodesignedphonenumber,callouttodesignatedphonenumberinthecaseofadesignatedexceptionormalfunctionintheunit,terminatingtelephonecallsifaconnectionislost.

5.9 RS-485 Serial Port OperationTheRS-485serialportisintendedtopermitoperationoftheflowcomputerinaRS-485network.Access is limited to reading process variables, totalizers, error logs and toexecutingactionroutinessuchasclearingtotalizers,alarms,andchangingsetpoints.

5.10 Pause Computations PromptTheuserwillbepromptedwitha"PauseComputations"messagewhenmakingsignificantsetup changes to the instrument. Pausing computations is necessary tomake anysignificantchanges.Withcomputationspaused,alloutputsassumeasafestateequaltothatofanunpoweredunit.Computationsresumewhenexitingthesetupmenu.

RS-232 Serial PortOperation

PC Communications

RS-232 Serial Port Operation of RS-232 Serial Port with Printers

Operation of RS-232 Serial Port with Modems

RS-485 Serial Port Operation

Pause ComputationsPrompt

ST2 Flow Computer

31

6. PROGRAMMING6.1 Front Panel Operation Concept for Program Mode

TheST2isfullyprogrammablethroughthefrontpanel.Theinstrumentsetupmenustructureisbasedonanumberoftopicalsubmenugroupswithonesubmenugroupforeachinstrumentfunction.Eachsubmenucontainsalloftheindividualsettingsassociatedwiththatfunction.Duringtheinstrumentsetup,setuptopicsareshownonthebottomlineofthedisplaywhilethedetailedselectionoptionsareshownonthetopline.Ahelpmenuisavailableforeachmenuitem.Please review the following key usage summary before attempting to setup theinstrument.

CAUTION: Whenthecomputationsarepausedtheinstrumentoutputswillgotoasafestatewhichisthesameasiftheunitlostpower.Allcalculationsstop.

Key Usage Summary:

MENU KEYPressingtheMENUkeywhileinthe"HOME"positionwillselecttheviewsetupparametersmode.Thereafter,theMENUkeyisusedto"popup"onemenulevel(i.e.returntothestartofthesubmenugroup).Theunitwill"popup"onelevelforeachtimetheMENU key is pressed until finally returning to the "HOME" position of showing the "scroll" display list.

UP & DOWN ARROW KEYSUsetheUPandDOWNarrowkeystonavigatethroughthesubmenugroups.Theupanddownarrowkeysarealsousedtoviewthenext/previousselectioninaselectionlistwithinasubmenucell.Whenenteringtextcharacters,theUPandDOWNarrowkeysareusedtoscrollthroughtheavailablecharactersetsforeachindividualcharacterlocation.PresstheENTERkeytoacceptthecharacterandadvancetothenextcharacter.

HELP KEYOn-linehelpisavailabletoassisttheuserduringinstrumentsetup.Aquickhelpisprovidedateachsetupstep.PresstheHELPkeytodisplayahelpmessageforthecurrentsetupselection.Thiskeyisalsousedtoenterdecimalsduringnumericentrysequences.

NUMERIC ENTRY KEYSThekeyslabeled"0-9","–",".",CLEARandENTERareusedtoenternumericalvalues.Aleading0willassumethatyouintendtoenteraminus"–"sign.Thestandardnumericentrysequenceis:CLEAR,"###",ENTER.Numericentryvaluesareboundedorclampedbyminimumandmaximumpermittedvalues.

CLEAR KEYTheCLEARkeyisusedtoclearnumericvaluesto"0".

ENTER KEYTheENTERkeyisusedtoacceptthecurrentvalueandadvancetothenextselection(Successfullyterminatethecurrentnumericentrysequence).

PRINT5

0 –TIME

CLEAR

•

MENU

ENTERHELP

TEMP4

PRE 13

RATE2

TOTAL1

GRAND6

SCROLL7

PRE 28

PRES9

Menu Key

Up & DownArrow Keys

Help Key

Numeric EntryKeys

Clear Key

Enter Key

ST2 Flow Computer

32

EZ SETUP

EZ SETUP

EZ Setup Example:Steam MassVortex Flowmeter

UNITS

FLOW EQUATION

TheEZSetuproutineisaquickandeasywaytoconfigurethemostcommonlyusedinstrumentfunctions.WerecommendfirstcompletingtheEZSetuproutinefortheflowequationandmetertypeforyourinitialapplication.Thesetupcanthenbecustomizedusingthecompletesubmenugroupsdescribedlaterinthischapter.

Caution: EnteringtheEZSetupmodeautomaticallysetsmany

featurestoadefaultvalue(withoutpromptingtheuser).Thismaycauseanypreviouslyprogrammedinformationtobelostorreset.

Selection:

YES,NO

Display: EZ SETUP? YES PAUSE COMPUTATIONS

Note: The"PauseComputations"warningmessageinformsthe

userthatallcomputationsarehaltedwhileprogrammingEZSetup.

Selectthedesiredunitsofmeasure.

Selection:

METRIC,ENGLISH

Display: ENGLISH UNITS?

Selecttheflowequationappropriateforyourapplication.

Selection:

STEAMMASS,STEAMHEAT,STEAMNETHEAT,STEAMDELTAHEAT,GASCORRECTEDVOLUME,GASMASS,GASCOMBUSTIONHEAT,LIQ.CORRECTEDVOLUME,LIQUIDMASS,LIQ.COMBUSTIONHEAT,LIQUIDSENSIBLEHEAT,LIQUIDDELTAHEAT,

STM–CONDENSATEHEAT

Display: STEAM MASS FLOW EQUATION

6.2EZSETUP

ST2 Flow Computer

33

Selectthetypeoffluidappropriateforyourapplication.

Selection: SATURATEDSTEAM,SUPERHEATEDSTEAM

Display: SATURATED STEAM FLUID TYPE

Selecttheflowmetertypeusedinyourapplication.

Selection:

LINEAR,SQRLAW,SQRLAW-LIN.,LINEAR16PT,SQRLAW16PT,SQRLAW-LIN.16PT,LINEARUVC,GILFLO,GILFLO16PT,BYPASS,ILVA16PT,MASSFLOW

Display: LINEAR FLOWMETER TYPE

Selecttheappropriateinputsignal.

Selection:

4-20mA,0-20mA,0-5Vdc,1-5Vdc,0-10Vdc,DIGITAL:10mVLEVEL,DIGITAL:100mVLEVEL,DIGITAL:2.5VLEVEL,4-20mASTACKED,0-20mASTACKED,4-20mALINEARMANIFOLD,0-20mALINEARMANIFOLD

Display: DIGITAL 2.5 V LEVEL INPUT SIGNAL

EntertheK-Factorfortheflowmeter.

Input:

Numberwithfloatingdecimalpoint: 0.0001...999999

Display: 123.67 P/ft3 K-FACTOR

Selecttheappropriatepressureinputsignal.

Selection:

MANUALPRESSURE,4-20PRESSURE(ABS.),0-20PRESSURE(ABS.),4-20PRESSURE(G),0-20PRESSURE(G)

Display: 4-20 PRESSURE (ABS.) INPUT SIGNAL

EZ SETUP

Fluid Type

FLOWMETER TYPE

INPUT SIGNAL

K-FACTOR

INPUT SIGNAL(PRESSURE)

6.2EZSETUP(Continued)

ST2 Flow Computer

34

Enterthefullscalevalueforthepressureinputsignal.

Input:

Numberwithfixeddecimalpoint: 000.000...999.999

Display: 580.000 psia FULL SCALE VALUE

Enterthedefaultvalueforthepressureinputsignal.

Input:

Numberwithfixeddecimalpoint: 000.000...999.999

Display: 14.696 psia DEFAULT VALUE

NOTE: Afterthelastentryhasbeensaved,thedisplayautomaticallyreturnstotheHOMEposition.The“EZSetup”routineiscompletedandtheflowcomputationsareresumed.

EZ SETUP

FULL SCALE VALUE(PRESSURE)

DEFAULT VALUE(PRESSURE)

6.2EZSETUP(Continued)

6.3DETAILEDMENU DESCRIPTION

DETAILED MENU DESCRIPTION

ThemenuorganizationfortheunitisdepictedinAppendixB.Thefirstdepictionisthatavailablewiththeoperatorpassword.Thesecondisthatavailablewithsupervisorpassword.

PleasereferenceAppendixBwhilereviewingthedetaileddescriptionsforeachmenulocationinthefollowingsections.

ST2 Flow Computer

35

6.4SYSTEMPARAMETERS

SYSTEM PARAMETERS

TheEZSetuproutineisaquickandeasywaytoconfigurethemostcommonlyusedinstrumentfunctions.

Reference: RefertoSection6.2forEZSetupProgramming.

Caution: EnteringtheEZSetupmodeautomaticallysets

manyfeaturestodefaultvalueswithoutinformingtheuser.Thismaycauseanypreviouslyprogrammedinformationtobelostorreset

Selection:

YES,NO

Display: EZ SETUP? NO PAUSE COMPUTATIONS

Note: The"PauseComputations"warningmessage

informstheuserthatallcomputationsarehaltedwhileprogrammingEZSetup.

Thisisthemenulocationwheretheoperatorcanunlocktheunitbyenteringthecorrectpassword(operatororsupervisorcode),orlocktheunitbyenteringtheincorrectpassword.

Selection:

0-9999

Display: 0 ACCESS CODE

EZ SETUP

ACCESS CODE

ST2 Flow Computer

36

TheFlowEquationsetsthebasicfunctionalityoftheunit.ChoosetheFlowEquationforyourparticularapplication.

Note: Varioussetupdataisonlyavailabledependingontheflow

equationselected.Theflowequationalsodeterminestheassignmentoftheinputs.

Caution: Selecttheflowequationasthefirststep.Werecommend

usingtheEZSetuptoselecttheproperflowequation.Theusercanthenenterthesubmenugroupsandmakeadditionalchangesasdesired.

Selection:

GASCOMBUSTIONHEAT,GASMASS,GASCORRECTEDVOLUME,STEAMDELTAHEAT,STEAMNETHEAT,STEAMHEAT,STEAMMASS,LIQUIDDELTAHEAT,LIQUIDSENSIBLEHEAT,LIQ.COMBUSTIONHEAT,LIQUIDMASS,LIQ.CORRECTEDVOLUME,STM–CONDENSATEHEAT

Display: STEAM MASS FLOW EQUATIONS

Enterthedateinthisformat:Day-Month-Year.

Note: Afterprolongedbreaksinthepowersupply(severaldays)

oruponinitialstart-upoftheunit,thedateandtimemustbereset.Thisdoesnotapplytounitswiththedataloggerorlanguageoption.

Input:

Flashingselectionscanbechanged. StoreandConfirmentrieswiththeENTERkey

Display: 08 FEB 1996 ENTER DATE

The"DaylightSavings"modeallowstheunittoautomaticallyadjustthetimeaccordingtodaylightsavingstimechange

Note: Select"Yes"toenabletheDaylightSavingsMode

Selection:

Yes,No

Display: Yes DAYLIGHT SAVINGS

SYSTEM PARAMETERS6.4SYSTEMPARAMETERS(Continued)

FLOW EQUATION

ENTER DATE

DAYLIGHT SAVINGS TIME

ST2 Flow Computer

37


ENTER TIME

PRIVATE CODE

Special Note:Afterreturningtotherunmode,programeditingisautomaticallylockedafter60secondsaslongasnokeysarepressedTheprogrameditingcanalsobedisabledbyenteringanumberotherthantheprivatecodeattheAccessCodeprompt.

SERVICE CODE

Note:TheServiceCodewillallowaccesstothesameinfor-mationasthePrivateCodewiththefollowingadditionalfunctions:

• ChangetheServiceCode• ChangetheOrderCode• ChangetheSerialNo.• ClearGrandTotal• ClearErrorsinErrorLog• View&Performcalibra-tioninService&AnalysisMenu

• RestoreFactoryCalibra-tionInformationinService&AnalysisMenu

• SetNextCalibrationDate• PrintMaint.Report• PerformServiceTest

Entertheactualtimeinthisformat:Hours-Minutes

Note: Afterprolongedbreaksinthepowersupply(severaldays)

oruponinitialstart-upoftheunit,thedateandtimemustbereset.

Input:


Display: 13:24 ENTER TIME

Apersonalcodemaybedefined.Thiscodeisusedtoenableprogramediting.

Note: •Theprivatecodeisfactorysetto1000 •Enteringaprivatecodeof"0"willalwaysenableprogram

editing(Turnsautomaticlockoff)

Input:

Maximum4digitnumber:0...9999 StoreandConfirmentrieswiththeENTERkey

Display: 1000 PRIVATE CODE

Apersonalservicecodemaybedefined.Thiscodeisusedtoenableprogrammenusthatarenormallyreservedforfactoryandservicepersonnel.(i.e.:Service&AnalysisSubmenuGroup)

Note: •Theservicecodeisfactorysetto2000 •Theservicecodesubmenuwillonlyappeariftheservice

codewasenteredforthe"AccessCode". Input:


Display: 2000 SERVICE CODE

ST2 Flow Computer

38


ApersonalizedtagcanbeenteredforunitI.D.purposes.

Note: •Maximumof10characters. •Spacesareconsideredcharactersandmustbeconfirmed

bypressingtheENTERkey. Input:

Alphanumericcharactersforeachof10positions 1...9;A...Z;_,<,=,>,?,etc.

Flashingselectionscanbechanged. StoreandConfirmentrieswiththeENTERkey.

Display: FT101 TAG NUMBER

TAG NUMBER

ENGINEERING CODE

Note:TheEngineeringCodewillallowaccesstothesameinformationasthePrivateCodewiththefollowingad-ditionalfunctions:

• ChangetheServiceCode• ChangetheOrderCode• ChangetheSerialNo.• ClearGrandTotal• ClearErrorsinErrorLog• View&Performcalibra-tioninService&AnalysisMenu

• RestoreFactoryCalibra-tionInformationinService&AnalysisMenu

• SetNextCalibrationDate• PrintMaint.Report• PerformServiceTest

Apersonalenginerringcodemaybedefined.Thiscodeisusedtoenableprogrammenusthatarenormallyreservedforengineeringpersonnel.(i.e.:Service&AnalysisSubmenuGroup)

Note: •Theengineeringcodeisfactorysetto3000 •Theengineeringcodesubmenuwillonlyappearifthe

engineeringcodewasenteredforthe"AccessCode". Input:


Display: 3000 SERVICE CODE

ST2 Flow Computer

39

Theordercode(partnumber)oftheunitcanbeentered.Thiswillhelpinidentifyingwhatoptionswereordered.

Note: •Theordernumberissetatthefactoryandshouldonlybe

alteredifoptionsareaddedinthefieldbyanauthorizedservicetechnician.

•Maximumof10characters. Input:

Alphanumericcharactersforeachof10positions 1...9;A...Z;


Display: ST2V10P ORDER CODE

Theserialnumberoftheunitisassignedatthefactory.

Note: Maximumof10characters. Input:

Alphanumericcharactersforeachof10positions 1...9;A...Z;

Display: SN 12345 SERIAL NUMBER

ORDER CODE

SERIAL NUMBER


SERIAL-NO. SENS. Theserialnumberortagnumberoftheflowmetercanbeentered.

Note: Maximumof10characters. Input:

Alphanumericcharactersforeachof10positions 1...9;A...Z;_,<,=,>,?,etc.

Flashingselectionscanbechanged. StoreandConfirmentrieswiththeENTERkey.

Display: SN 12345 SERIAL-NO. SENS.

ST2 Flow Computer

40

DISPLAY6.5DISPLAY

Selectthevariablethataretobedisplayedinthe"HOMEposition"duringnormaloperation.Eachvariablecanbeassignedtoline1(L1),line2(L2)orNO(removedfromscrolllist).

Note: •ToinitiatethescrolllistpresstheSCROLLkey.Thelistwill

bedisplayedingroupsoftwo,eachgroupisdisplayedforapproximately3to4seconds.

•Anyalarmmessageswillbedisplayedperiodically,alternatingthroughoutthescrolllist.

Selection (with Prompt):

CHANGE?YES,NO

ADDTOLIST?L1,L2,NO

Variable Selection: HEATFLOW,MASSFLOW,VOLUMEFLOW,STD.

VOLUMEFLOW,TEMP.1,TEMP.2,DELTAT,PRESSURE,DENSITY,SPEC.ENTHALPY,TIME,DATE,HEATTOTAL,HEATGRANDTOTAL,MASSTOTAL,MASSGRANDTOTAL,STDVOLUMETOTAL,STD.V.GRANDTOTAL,VOLUMETOTAL,VOL.GRANDTOTAL,PEAKDEMAND,DEMANDLASTHOUR,PEAKDEMANDTIME,PEAKDEMANDDATE

Note:VariableselectionwillvarydependingonFlowEquationselectedandoptionssupplied.

Display: ADD TO LIST? L1 HEAT FLOW?

SCROLL LIST

ST2 Flow Computer

41

The"displaydamping"constantisusedtostabilizefluctuatingdisplays.Thehighertheconstant,thelessfluctuationwillbedisplayed.

Note: Relayresponsetimeisaffectedbythevalueenteredfordisplaydamping.Thelargerthedisplaydampingvalue,theslowertherelayresponsetimewillbe.Thisisintendedtopreventfalsetriggeringoftherelays.Enteradisplaydampingfactorofzero(0)forfastestresponsetime.

Note: •Factorysetting:1 Input:

2digitsmax;0...99

Display: CONSTANT? 1 DISPLAY DAMPING

Enterthenumberofdecimalplacesfornumericalvalues.

Note: •Thenumberofdecimalplacesappliestoalldisplayed

variablesandtotalizers. •Thenumberofdecimalplacesisautomaticallyreducedif

thereisinsufficientspaceavailableonthedisplayforlargenumbers.

•Thenumberofdecimalplacessetheredoesnotaffectthefunctionssetintheprogrammingsetup.

Selection:

0,1,2,3or4(decimalplaces)

Display: 3 MAX. DEC. POINT

Thelanguagecanbeselectedinwhichalltext,parametersandoperatingmessagesaretobedisplayed.

Note: •Thisfunctionissupportedbyaspecialcapabilityinthe

setupdiskette. Selection:

ENGLISH,OTHER

Display: ENGLISH LANGUAGE

6.5DISPLAY(Continued)

DISPLAY

DISPLAY DAMPING

MAX. DEC. POINT

LANGUAGE

ST2 Flow Computer

42

SYSTEM UNITS

Select"one"unitoftimetobeusedasareferenceforallmeasuredorderivedandtime-dependantprocessvariablesandfunctionssuchas: •flowrate(volume/time;mass/time) •heatflow(amountofenergy/time)etc.

Selection:

/s(persecond),/m(perminute), /h(perhour),/d(perday)

Display: /h TIME BASE

Selecttheunitforheatflow(amountofenergy,combustionheat).

Note: Theunitselectedherealsoappliestothefollowing: •Zeroandfullscalevalueforcurrent. •Relaysetpoints

Selection:

kBtu/timebase,kW,MJ/timebase,kCal/timebase,MW,tons,GJ/h,Mcal/h,Gcal/h,Mbtu/h,Gbtu/h

Display: kBtu/h HEAT FLOW UNIT

Selecttheunitofheatfortheparticulartotalizer.

Note: Theunitselectedherealsoappliestothefollowing: •Pulsevalueforpulseoutput •Relaysetpoints

Selection:

kBtu,kWh,MJ,kCal,MWh,tonh,GJ,Mcal,Gcal,Mbtu,Gbtu

Display: kBtu HEAT FLOW UNIT

TIME BASE

HEAT FLOW UNIT

HEAT TOTAL UNIT

6.6SYSTEM UNITS

ST2 Flow Computer

43

Selecttheunitofmassflowrate(mass/timebase).

Note: Theunitselectedherealsoappliestothefollowing: •Zeroandfullscalevalueforcurrent •Relaysetpoints

Selection:

lbs/timebase,kg/timebase,g/timebase, t/timebase,tons(US)/timebase, tons(long)/timebase

Display: lbs/h MASS FLOW UNIT

Selecttheunitofmassfortheparticulartotalizer.


Selection:

lbs,kg,g,t,tons(US),tons(long),hlbs,Klbs,Mlbs

Display: lbs MASS TOTAL UNIT

SYSTEM UNITS6.6SYSTEM UNITS(Continued)

MASS FLOW UNIT

MASS TOTAL UNIT

ST2 Flow Computer

44

SYSTEM UNITS

Selecttheunitofcorrectedvolumetricflowrate(correctedvolume/timebase).

Note: Theunitselectedherealsoappliestothefollowing: •Zeroandfullscalevalueforcurrent •Relaysetpoints Corrected Volume =volumemeasuredunderoperatingconditions

convertedtovolumeunderreferenceconditions.

Selection:Theavailableselectionswillchangedependingontheflowequationselected.

bbl/timebase,gal/timebase,l/timebase,hl/timebase,dm3/timebase,ft3/timebase,m3/timebase,scf/timebase,Nm3/timebase,NI/timebase,igal/timebase,mcf/timebase

Allunitslistedaboveapplytocorrectedvolume.

Display: scf/h COR.VOL. FLOW UNIT

Selecttheunitofvolumefortheparticulartotalizer.

Note: Theunitselectedherealsoappliestothefollowing: •Pulsevalueforpulseoutput •RelaysetpointsCorrected Volume =volumemeasuredunderoperatingconditions

convertedtovolumeunderreferenceconditions.


bbl,gal,l,hl,dm3,ft3,m3,scf,Nm3,NI,igal,mcf

Allunitslistedaboveapplytocorrectedvolume.

Display: scf COR.VOLUME TOT.UNIT

COR.VOL. FLOW UNIT

COR. VOLUME TOT.UNIT

6.6SYSTEM UNITS(Continued)

ST2 Flow Computer

45

Selecttheunitforvolumetricflowrate.



bbl/timebase,gal/timebase,l/timebase,hl/timebase,dm3/timebase,ft3/timebase,m3/timebase,acf/timebase,igal/timebase

Allunitslistedaboveapplytotheactualvolumemeasuredunderoperatingconditions.

Display: ft3/h VOLUME FLOW UNIT

Selecttheunitforuncorrectedvolumetotalizer.



bbl,gal,l,hl,dm3,ft3,m3,acf,igal

Allunitslistedaboveapplytotheactualvolumemeasuredunderoperatingconditions.

Display: ft3 VOLUME TOTAL UNIT

VOLUME FLOW UNIT

VOLUME TOTAL UNIT


ST2 Flow Computer

46


Incertaincountriestheratioofgallons(gal)perbarrels(bbl)canvaryaccordingtothefluidusedandthespecificindustry.Selectoneofthefollowingdefinitions: •USorimperialgallons •Ratiogallons/barrel

Selection:.

US:31.0gal/bblforbeer(brewing) US:31.5gal/bblforliquids(normalcases) US:42.0gal/bblforoil(petrochemicals) US:55.0gal/bblforfillingtanks imp:36.0gal/bbl forbeer(brewing) imp:42.0gal/bbl foroil(petrochemicals)

Display: US: 31.0 gal/bbl DEFINITION bbl

Selecttheunitforthefluidtemperature.

Note: Theunitselectedherealsoappliestothefollowing: •Zeroandfullscalevalueforcurrent •Relaysetpoints •Referenceconditions •Specificheat

Selection:

°C(Celsius),°F(Fahrenheit), °K(Kelvin),°R(Rankine)

Display: oF TEMPERATURE UNIT

DEFINITION bbl

TEMPERATURE UNIT

ST2 Flow Computer

47


Selecttheunitforprocesspressure.

Note: Theunitselectedherealsoappliestothefollowing: •Zeroandfullscalevalueforcurrent •Relaysetpoints •Referenceconditions DifferentialpressureisinmbarforMetricselections Differentialpressureisin"H2OforEnglishselections

Selection:

bara,kpaa,kc2a,psia,barg,psig,kpag,kc2g

Definitions:

bara bar kpaa kpa Absolutepressure kc2a kg/cm2 ("a"forabsolute) psia psi

barg bar Gaugepressurecomparedto kpag kpa atmosphericpressure kc2g kg/cm2 ("g"forgauge) psig psi

Gaugepressurediffersfromabsolutepressurebytheatmosphericpressure,whichcanbesetinthesubmenugroup"OTHERINPUT".

Display: psia PRESSURE UNIT

Selecttheunitforthedensityofthefluid.


Selection:

kg/m3,kg/dm3,#/gal,#/ft3 (#=lbs=0.4536kg)

Display: #/ft3 DENSITY UNIT

PRESSURE UNIT

DENSITY UNIT

ST2 Flow Computer

48


Selecttheunitforthecombustionvalue(spec.enthalpy).

Note: Theunitselectedherealsoappliestothefollowing: •Specificthermalcapacity (kWh/kg→kWh/kg-°C)

Selection:

btu/#,kWh/kg,MJ/kg,kCal/kg (#=lbs=0.4536kg)

Display: Btu/# SPEC. ENTHALPY UNIT

Selecttheunitformeasurementsoflength.

Selection:

in,mm

Display: in LENGTH UNIT

SPEC. ENTHALPY UNIT

LENGTH UNIT

ST2 Flow Computer

49

FLUID DATA6.7FLUID DATA

Selectthefluid.Therearethreetypes:

1. Steam / WaterAllinformationrequiredforsteamandwater(suchassaturatedsteamcurve,densityandthermalcapacity)ispermanentlystoredintheflowcomputer.

2. Fluid DisplayedPresetinformationforotherfluids(suchasairandnaturalgas)isstoredintheflowcomputerandcandirectlyadoptedbytheuser.

Ifthepresetvaluesneedtobechangedtofityourspecificprocessconditions,thenproceedasfollows:Selectthefluid(airornaturalgas)andpresstheENTERkey(thissetsallofthepresetvalues).Re-selectthesubmenugroup"FLUIDTYPE",nowchoose"GENERIC"andENTER.Nowthepresetvaluesforthepreviouslyselectedfluidcanbealtered.

3. Generic FluidSelectthesetting"GENERIC"fortheFluidtypesubmenu.Thecharacteristicsofanyfluidcannowbedefinedbytheuser.

Selection:

GENERIC,WATER,SATURATEDSTEAM,SUPERHEATEDSTEAM,DRYAIR,HUMIDAIR,HUMIDGAS,NATURALGAS,NATURALGAS(NX-19),HYDROGEN,ARGON,METHANE,NITROGEN,CARBONDIOXIDE,PROPANE,OXYGEN,ETHANE,HELIUM

Display: GENERIC FLUID TYPE

Selectthedensityforagenericfluidatreferencetemperatureandpressure(see"STPREFERENCE"in"OTHERINPUT"submenugroup).

Input:

Numberwithfloatingdecimalpoint:0.0001...10000.0

Display: .0760 #/ft3 REF. DENSITY

FLUID TYPE

REF. DENSITY

ST2 Flow Computer

50

Enterthethermalexpansioncoefficientforagenericliquid.Thecoefficientisrequiredforthetemperaturecompensationofvolumewithvariousflowequations(i.e.LiquidMassorCorrectedLiquidVolume).

Input:

Numberwithfloatingdecimalpoint:0.000...100000(e-6)

Thethermalexpansioncoefficientcanbecalculatedasfollows:

+106

ρ(T1)

ρ(To)

T1

- To

1 -

c =

c ThermalexpansioncoefficientT0,T1 Temperaturesatknownpoints(seebelow)ρ (T0,T1) DensityoftheliquidattemperatureT0 or T1

Foroptimumaccuracy,choosethereferencetemperaturesasfollows:

T0:midrangetemperature T1:chooseasecondpointatornearthemaximumprocess temperature

106 Thevalueenteredisinternallymultipliedbyafactorof10-6(display:e-6/temp.unit)sincethevaluetobeenteredisverysmall.

Display: 104.300 (e-6/oF) THERM.EXP.COEF.

Enterthespecificcombustionheatforgenericfuels.

Input:

Numberwithfloatingdecimalpoint:0.000...100000

Display: 1000.000 kBtu/lbs COMBUSTION HEAT

Enterthespecificheatcapacityforgenericfluids.Thisvalueisrequiredforcalculatingthedeltaheatofliquids.

Input:


Display: 10.000 kBtu/lbs-°F SPECIFIC HEAT

FLUID DATA6.7FLUID DATA(Continued)

THERM. EXP. COEF.

COMBUSTION HEAT

SPECIFIC HEAT

ST2 Flow Computer

51

EnteraZ-factorforthegasatoperatingconditions.TheZ-factorindicateshowdifferenta"real"gasbehavesfroman"idealgas"whichexactlyobeysthe"generalgaslaw"(PxV/T=constant;Z=1).Thefurthertherealgasisfromitscondensationpoint,theclosertheZ-factorapproaches"1".

Note: •TheZ-factorisusedforallgasequations. •EntertheZ-factorfortheaverageprocessconditions

(pressureandtemperature).Input:

Numberwithfixeddecimalpoint:0.1000...10.0000

Display: 1.000 FLOW. Z-FACTOR

EnteraZ-factorforthegasatreferenceconditions.

Note: •TheZ-factorisusedforallgasequations. •Definethestandardconditionsinthesubmenu"STP

REFERENCE"(OTHERINPUTsubmenugroup).Input:


Display: 1.000 REF. Z-FACTOR

Entertheisentropicexponentofthefluid.Theisentropicexponentdescribesthebehaviorofthefluidwhenmeasuringtheflowwithasquarelawflowmeter.Theisentropicexponentisafluidpropertydependentonoperatingconditions.

Note: Selectoneofthe"SQRLAW"selectionsin"FLOWMETER

TYPE"ofsubmenugroup"FLOWINPUT"toactivatethisfunction.

Input:


Display: 1.4000 ISENTROPIC EXP.


FLOW. Z-FACTOR

REF. Z-FACTOR

ISENTROPIC EXP.

ST2 Flow Computer

52

EntertheMole%Nitrogenintheanticipatednaturalgasmixture.ThisinformationisneededbytheNX-19computation

Note: Select"NATURALGAS(NX-19)"in"FLUIDTYPE"toactivate

thisfunction.

Input:


Display: 0.00 MOLE % NITROGEN

EntertheMole%CO2intheanticipatednaturalgasmixture.ThisinformationisneededbytheNX-19computation

Note: Select"NATURALGAS(NX-19)"in"FLUIDTYPE"to

activatethisfunction.

Input:


Display: 0.00 MOLE % CO2

EntertheViscositycoefficientAfortheanticipatedfluid.ThisinformationisneededbytheviscositycomputationforUVCandforReynoldsNumbercalculations.

Note: Select"SQUARELAW16PT"or"LINEARUVC"in

"FLOWMETERTYPE"toactivatethisfunction.

Input:

Numberwithfixeddecimalpoint:0.000000...1000000

Display: 0.000444 VISCOSITY COEF. A


MOLE % NITROGEN

MOLE % CO2

VISCOSITY COEF. A

ST2 Flow Computer

53

EntertheViscositycoefficientBfortheanticipatedfluid.ThisinformationisneededbytheviscositycomputationforUVCandforReynoldsNumbercalculations.

Note: Select"SQUARELAW16PT"or"LINEARUVC"in

"FLOWMETERTYPE"toactivatethisfunction.

Input:

Numberwithfixeddecimalpoint:0.000000...1000000

Display: 0.3850 VISCOSITY COEF. B


VISCOSITY COEF. B

Computation of Viscosity Coef. A and BTheflowcomputersolvesanequationwhichcomputestheviscosityasafunctionoftemperature.Twoparametersmustbeenteredforthiscalculationtobeperformed.ThesearethesetupparametersViscosityCoef.AandViscosityCoef.B.Atablelistingthesevaluesforcommonfluidsisavailablefromthefactory.Alternately,ifyourintendedfluidisnotlisted,theViscosityCoef.AandBcanbederivedfromtwoknowntemperature/viscositypairs.Beginbyobtainingthisinformationforyouintendedfluid.ConverttheseknownpointstounitsofDegreesFandcentipoise(cP)TheinformationisnowinasuitableformtocomputetheViscosityCoef.AandViscosityCoef.Busingthefollowingequationbasedonthefluidstate.

Foraliquid,AandBarecomputedasfollows:

B= (T1+459.67)•(T2+459.67)•ln[cP1/cP2] (T2+459.67)-(T1+459.67)

A= cP1. exp[B/(T1+459.67)]

Foragas,AandBarecomputedasfollows:

B= ln[cP2/cP1]. ln[(T2+459.67)/(T1+459.67)]

A= cP1. (T1+459.67)B

NOTE: cS= cP. Density(inkg/l)

Computation of Viscosity Coef. A and B

Enterthe%RelativeHumidityintheanticipatedgasmixture.ThisinformationisneededtomoreaccuratelycomputethedensityofaHumidgas.nput:


Display: 0.3850 % RELATIVE HUMIDITY

% RELATIVE HUMIDITY

ST2 Flow Computer

54

6.8FLOW INPUT FLOW INPUT

FLOWMETER TYPE Select the flowmeter type. The flow equation (see SYSTEM PARAMETERS) and the flowmeter selected here determine the basic operation of the flow computer.

Selection:

LINEAR Volumetric flowmeter with linear pulse or analog output.

SQR LAW Differential pressure transmitter without square root extraction, with analog output.

SQR LAW-LIN. Differential pressure transmitter with square root extraction and analog output.

LINEAR 16 PT* Volumetric flowmeter with nonlinear pulse or analog output; with 16 point linearization table.

SQR LAW 16 PT* Differential pressure transmitter without square root extraction, with analog

output and 16 point linearization table.

SQR LAW-LIN. 16 PT* Differential pressure transmitter with square root extraction, analog output

and 16 point linearization table.

LINEAR UVC Volumetric Turbine flowmeter with UVC calibration curve documentation and pulse output.

LINEAR MANIFOLD Linear manifold consists of 2 linear flowmeters used in conjunction with an external bypass/diverter value. It may be used with turbine, PD, Mag, Vortex flowmeters equipped with analog outputs to extend the allowable turndown range.

GILFLO Gilflo flowmeters are special purpose differential pressure type flowmeters with an analog output where the differential pressure is linear with flow.

GILFLO 16PT Gilflo 16 PT flowmeters are special purpose differential pressure type flowmeters with an analog output where the differential pressure is approximately linear with flow, but can be further enhanced by a 16 point linearization table.

BYPASS BYPASS is a selection for use with Bypass(Shuntflow) flowmeters equipped with a pulse output.

ILVA 16PT ILVA 16 PT flowmeters are special purpose differential pressure type flowmeters with an analog output where the differential pressure is approximately linear with flow, but can be further enhanced by a 16 point linearization table.

MASS FLOW METER Flowmeter type such as Coriolis, or Thermal Flowmeter whose output is directly proportional to mass flow. Multivariable transmitters whose output is proportional to a computed mass flow rate can also use this meter type selection.

* A linearization table must be entered by user. (see "LINEARIZATION" submenu). Display: LINEAR FLOWMETER TYPE

ST2 Flow Computer

55

6.8FLOW INPUT(Continued)

FLOW INPUT

Select the type of square law flowmeter to be used with the instrument.

Note: This selection will only appear if one of the Square Law

selections were made in "FLOWMETER TYPE".

Selection: ORIFICE, V-CONE, ANNUBAR, PITOT, VENTURI, FLOW NOZZLE, BASIC SQRLAW/TARGET, WEDGE, VARABAR, ACCELABAR

Display: ORIFICE SQUARE LAW FLOWMETER

Select the size of the ILVA flowmeter.

Selection: DN50, DN80, DN150, DN200

Select the size of the Accelabar flowmeter.

Selection: DN50, DN80, DN150, DN200

Select the type of measuring signal produced by the flowmeter.

Selection: DIGITAL, 10 mV LEVEL Voltage pulses, 10mV

trigger threshold. DIGITAL, 100 mV LEVEL Voltage pulses, 100mV

trigger threshold. DIGITAL, 2.5 V LEVEL Voltage pulses, 2.5V trigger

threshold.

4-20 mA 4-20 mA current signal 0-20 mA 0-20 mA current signal 4-20 mA STACKED 4-20 mA current signal 0-20 mA STACKED 0-20 mA current signal

0-5 V 0-5 V voltage signal 1-5 V 1-5 V voltage signal 0-10 V 0-10 V voltage signal

Display: 4-20 mA INPUT SIGNAL

SQUARE LAWFLOWMETER

ILVA METER SIZE

ACCELABAR SIZE

INPUT SIGNAL

ST2 Flow Computer

56

FLOW INPUT6.8FLOW INPUT(Continued)

Setthelowscalevaluefortheanaloginputsignal.Thevalueenteredheremustbeidenticaltothevaluesetfortheflowmeter.Note: •Forflowmeterswithanalog/linearoutput,theflowcomputeruses

theselectedsystemunitsforvolumetricflowrate. • Theunitsfordifferentialpressureflowmetersaredependenton

thesystemunitsselectedforpressure: -Imperialunits[inchesH2O] - Metricunits:[mbar]

Input: Numberwithfloatingdecimalpoint:0.000...999999

Display: .000 ft3/h LOW SCALE VALUE

Setthefullscalevaluefortheanaloginputsignal.Thevalueenteredheremustbeidenticaltothevaluesetfortheflowmeter.

Note: •Forflowmeterswithanalog/linearoutput,Target,generic

squarelawandGilfloflowmeters,theflowcomputerusestheselectedsystemunitsforvolumetricflowrate.

•Theunitsfordifferentialpressureflowmetersaredependentonthesystemunitsselectedforpressure:

-Imperialunits[inchesH2O] -Metricunits:[mbar]

Input:


Display: 10000.00 ft3/h FULL SCALE VALUE

Setthelowscalevalueforthehighrangetransmitteranaloginputsignal.Thevalueenteredheremustbeidenticaltothevaluesetfortheflowmeter.Note: •Theunitsfordifferentialpressureflowmetersare

dependentonthesystemunitsselectedforpressure: -Imperialunits[inchesH2O] -Metricunits:[mbar]Input:


Display: .000 ft3/h LOW SCALE-HIGH RANGE

LOW SCALE

FULL SCALE

LOW SCALE-HI RANGE

ST2 Flow Computer

57

llscalevalueforthehighrangetransmitteranaloginputsignal.Thevalueenteredheremustbeidenticaltothevaluesetfortheflowmeter.

Note: •Theunitsfordifferentialpressureflowmetersaredependent

onthesystemunitsselectedforpressure: -Imperialunits[inchesH2O] -Metricunits:[mbar]Input:



EnterthevalueofdeltaPatwhichtheunitwillbeginusingthehirangedeltaPpressuretransmittersignal.

Input:


Display: 0.000 in H2O SWITCH UP DP

EnterthevalueofdeltaPatwhichtheunitwillbeginusingthelorangedeltaPpressuretransmittersignal.

Input:


Display: 0.000 in H2O SWITCH UP DP

Enterthelowflowcutoff.Thisisusedasaswitchpointforcreepsuppression.Thiscanbeusedtopreventlowflowsfrombeingregistered.

Input:


Display: .000 ft3/h LOW FLOW CUTOFF


FLOW INPUT

FULL SCALE-HI RANGE

SWITCH UP DP

SWITCH DOWN DP

LOW FLOW CUTOFF

ST2 Flow Computer

58


Enterthegeometricratioforthesquarelawdevicebeingused.Thisvalueisgivenbythemanufactureroftheorificeplate,orothersquarelawdevice.

Note: "Beta"isonlyrequiredformeasuringgasorsteamwithsome

squarelawflowmeters.

Input:


Display: 1.0000 ENTER BETA

ENTER BETA

CAL. DENSITY Enterthecalibrationdensity.Thisisthefluiddensityuponwhichtheflowmeter'scalibrationisbased.

Input:

Numberwithfloatingdecimalpointinrequestedunits: 0.000...10.000

Display: 8.3372 (#/gal) CAL. DENSITY

EntertheK-Factoroftheflowmeter.

Note: •TheK-Factorisexpressedinpulsesperunitvolume(as

definedby"totalunits")

Input:


Display: .000 ft3/h LOW FLOW CUTOFF

Entertheinletpipediameterorboreforthepipingsectionupstreamoftheflowmeasurementdevice.

Input:


Display: 4.090 in INLET PIPE BORE

K-FACTOR

INLET PIPE BORE

ST2 Flow Computer

59


Theflowmeterpipeexpandsdependingonthetemperatureofthefluid.Thisaffectsthecalibrationoftheflowmeter.Thissubmenuallowstheusertoenteranappropriatecorrectionfactor.Thisisgivenbythemanufactureroftheflowmeter.Thisfactorconvertsthechangesinthemeasuringsignalperdegreevariationfromcalibrationtemperature.Thecalibrationtemperatureisenteredintotheflowcomputerto70F/21°C.

Somemanufacturersuseagraphoraformulatoshowtheinfluenceoftemperatureonthecalibrationoftheflowmeter.Inthiscaseusethefollowingequationtocalculatethemeterexpansioncoefficient:

KME MeterexpansioncoefficientQ(T) VolumetricflowattemperatureTresp.TCALT AverageprocesstemperatureTCAL Calibrationtemperature

Note: •Thiscorrectionshouldbesetineithertheflowmeterorin

theflowcomputer. •Enteringthevalue"0.000"disablesthisfunction •ValuecanbecalculatedfromFafactor

Input:

Numberwithfloatingdecimalpoint: 0.000...999.9(e-6/°X)

Display: 27.111 (E-6/oF) METER EXP. COEF.

METER EXP. COEF.

ST2 Flow Computer

60

TheDP-Factordescribestherelationshipbetweentheflowrateandthemeasureddifferentialpressure.Theflowrateiscomputedaccordingtooneofthethreefollowingequations,dependingontheselectedflowequation:

Steam(orgas)massflow:

Liquidvolumeflow:

Gascorrectedvolumeflow:

M MassflowQ VolumetricflowQREF CorrectedvolumetricflowKDP DP-Factorε1 Gasexpansionfactor(Y1)T OperatingtemperatureTCAL Calibrationtemperature∆p Differentialpressureρ DensityatflowingconditionsKME Meterexpansioncoefficientx10–6ρREF Referencedensity

DP FACTOR


FLOW INPUT

2 • ∆p • ρ1 – KME • (T – TCAL)

√KDP ε1• •M =

(2 • ∆p) /ρ(1 – KME • (T – TCAL ))

√KDP•Q =

2 • ∆p • ρ(1 – KME • (T – TCAL ))

√QREF =

KDP ε1• •ρREF •

ST2 Flow Computer

61

TheDP-Factor(KDP)canbeenteredmanuallyortheflowcomputercancomputeitforyou.Theinformationnecessaryforthiscalculationcanbefoundonthesizingsheetfromaflowmetersizingprogram.

Note:ThefollowingdatamustbeenteredbeforetheflowcomputercancomputetheDP-Factor.

1.Flowequation see"SYSTEMPARAMETER"2.FluidData see"FLUIDDATA"3.Beta see"FLOWINPUT"4.Meterexpansioncoef.ref see"FLOWINPUT"5.STPRef.temperature*,pressure see"OTHERINPUT"7.InletPipeBore see"FLOWINPUT"8.CalibrationTemp. see"OTHERINPUT"

*onlyforgasflowequations.

Entries:

CHANGEFACTOR? NO CHANGEFACTOR? YES

If"YES"theflowcomputerwillpromptyoufurther:

COMPUTEFACTOR? NO COMPUTEFACTOR? YES

If"NO": EnterDPFACTOR If"YES": Youwillbepromptedforthefollowing:

ENTERDELTAP ENTERFLOWRATE ENTERDENSITY ENTERTEMPERATURE ENTERINLETPRESSURE ENTERISENTROPICEXP

DP FACTOR(Continued)


FLOW INPUT

ST2 Flow Computer

62


Theflowcomputerwillthencomputethegasexpansionfactor(ε1),(Y1)usingoneofthefollowingequation:

OrificeCase:

V-Cone,Venturi,FlowNozzle,WedgeCase:

Y1=

Annubar,Pitot,TargetCase;

Y1=ε1=1.0

ε1 Gasexpansionfactorβ BETA(geometricratio)∆p Differentialpressureκ Isentropicexponentp1 Inletpressure(absolute)


∆p27.7 • p1

R = 1 –

κ − 11 −β4) •( κ • R2/κ • (1 - R(κ−1)/κ

)

[(1 −(β •4 R )) • (1 - R)]2/κε1 =

NOTE: 27.7isaunitsconversionconstantfromtheabsoluteinletpressureunitstothedifferentialpressureunits.(27.7isforpsiato"H2O,useotherunitsconversionsasrequired.).

∆pκ • p1 • 27.7ε1 = 1 – (0.41 + 0.35 β4) •[ ]Y =1

ST2 Flow Computer

63

Enterthemaximumpossiblefrequencyofaflowmeterwithadigitaloutput.Usingthevalueenteredhere,theflowcomputerselectsasuitablelimitingfrequencyforlowpassfiltertohelpsuppressinterferencefromhigherfrequencysignals.

Input:

Max.5digitnumber:10...40000(Hz):

Display: 40000 Hz LOW PASS FILTER

LOW PASS FILTER


TheDP-Factor(KDP)isthencomputedusingoneofthefollowingequations:

Steam:

Liquid:

Gas:

KDP DP-FactorM MassflowQ VolumetricflowQREF Correctedvolumetricflowε1 GasexpansionfactorT OperatingtemperatureTCAL Calibrationtemperature∆p Differentialpressureρ DensityatflowingconditionsρREF Referencedensity

Note:Thecomputationaccuracycanbeenhancedbyenteringupto16valuesforReynold'sNumberDP-Factorinalinearizationtable(see"LINEARIZATION").EachDP-Factorcanbecalculatedusingtheaboveprocedure.Foreverycalculation,asizingsheetisrequired.Theresultshavetobeenteredinthelinearizationtableafterwards.

QREF • ρREF • (1 – KME • (T – TCAL))

ε1 • √2 • ∆p • ρKDP =

Q • (1 – KME • (T – TCAL))

2 • ∆pρ

KDP =

M • (1 – KME • (T – TCAL))

ε1 • √2 • ∆p • ρKDP =


FLOW INPUT

ST2 Flow Computer

64


FLOW INPUT

Withmanyflowmeters,therelationshipbetweentheflowrateandtheoutputsignalmaydeviatefromanidealcurve(linearorsquared).Theflowcomputerisabletocompensateforthisdocumenteddeviationusingalinearizationtable.Theappearanceofthelinearizationtablewillvarydependingonparticularflowmeterselected.

Linear flowmeters with pulse outputThelinearizationtableenablesupto16differentfrequency&K-factorpairs.ThefrequencyandcorrespondingK-factorarepromptedforeachpairofvalues.Pairsareenteredinascendingorderbyfrequency.

Linear Flowmeters with pulse outputs and a UVC Curve:Thelinearizationtableenablesupto16differentHz/cstksandK-Factorpoints.TheHz/cstksandcorrespondingK-Factorsarepromptedforeachpairofvalues.PairsareenteredinascendingorderbyHz/cstks.

Linear flowmeters with analog output (excluding Gilflo, ILVA)Thelinearizationtableenablesupto16differentflowrate&correctionfactorpairs.Theflowrateandcorrespondingcorrectionfactorarepromptedforeachpairofvalues.Thecorrectionfactor(Cf)isdeterminedasfollows.

Cf =

actual flowratedisplayed flowrate

Linear/squared DP transmitters with analog outputThelinearizationtableenablesupto16differentReynold'sNumberanDPfactorpairs.TheReynold'sNumberandcorrespondingDPfactorarepromptedforeachpairofvalues.

Selection: CHANGETABLE? NO CHANGETABLE? YES

If"YES"thelinearizationtablesequenceofpromptswillbegin.

Example(forlinearflowmeterswithanalogoutput) Enterflowrate: FLOWft3/h3.60 POINT0

Entryofcorrespondingcorrectionfactor: COR.FACTOR1.0000 POINT0

Note: Enter"0"forthevalueofapair(otherthanpoint0)toexitthelinearizationtableroutineandusethevaluesstoreduptothatpoint.

LINEARIZATION

ST2 Flow Computer

65

EntertheFlowmeterLocation

Selection:

Hot,Cold:

Display: COLD FLOWMETER LOCATION

EntertheBypassCalibrationFactor.

Input:

Max.6digitnumber:0.000001...999999

Display: 1.000000 BYPASS CAL. FACTOR

EntertheBypassEAmFactor.

Input:

Max.6digitnumber:0.000001...999999

Display: 1.000000 BYPASS EAM FACTOR

EntertheBypassDCFactor.

Input:

Max.6digitnumber:0.1...10.0

Display: 1.000000 BYPASS DC FACTOR

EntertheBypassYmFactor.

Input:

Max.6digitnumber:0.001...1.0

Display: 1.000000 BYPASS YM FACTOR


FLOW INPUT

VIEW INPUT SIGNAL Thisfeatureisusedtoseethepresentvalueoftheflowinputsignal.Thetypeofelectricalsignalisdeterminedbytheflowmeterinputsignaltypeselection.

Display: 150 Hz VIEW INPUT SIGNAL

BYPASS CAL. FACTOR

BYPASS EAm FACTOR

BYPASS DCFACTOR

BYPASS YmFACTOR

FLOWMETER LOCATION

VIEW HIGH RANGE SIGNAL

Thisfeatureisusedtoseethepresentvalueofthehighrangeflowinputsignal.Thetypeofelectricalsignalisdeterminedbytheflowmeterinputsignaltypeselection.

Display: 4 mA VIEW HIGH RANGE SIGNAL

ST2 Flow Computer

66

Inadditiontotheflowinput,theflowcomputerprovidestwootherinputsfortemperature,densityand/orpressuresignals.Inthissubmenu,selecttheparticularinputwhichistobeconfiguredinthefollowingsubmenus.Input1mayalsobeusedinconjunctionwithasteamtrapmonitor.

Selection: 1(input1:TemperatureorSteamTrapMonitor) 2(input2:Pressure,Temperature2,Density)

Display: 1 SELECT INPUT

Determinethetypeofmeasuringsignalproducedbythetemperature,pressureordensitysensor.

Note:Whensaturatedsteamismeasuredwithonlyapressuresensor,"INPUT1NOTUSED"mustbeselected.Ifonlyatemperaturesensorisused,"INPUT2NOTUSED"mustbeselected.

Selection:Input1(Temperature): INPUT1NOTUSED,RTDTEMPERATURE, 4-20TEMPERATURE,0-20TEMPERATURE,MANUAL

TEMPERATURE*,4-20mATRAPSTATUS

Input2(Processpressure,Temperature2,Density): INPUT2NOTUSED,4-20PRESSURE(G), 0-20PRESSURE(G),MANUALPRESSURE*, 4-20PRESSURE(ABS.),0-20PRESSURE(ABS.), RTDTEMPERATURE2,4-20TEMPERATURE2, 0-20TEMPERATURE2,MANUALTEMPERAT.2*,4-20

DENSITY,0-20DENSITY,MANUALDENSITY*

*Selectthissettingifauserdefinedfixedvalueforthecorrespondingmeasuringvalueisrequired.

Display: 4-20 TEMPERATURE INPUT SIGNAL

6.9OTHER INPUT

OTHER INPUT

SELECT INPUT

INPUT SIGNAL

ST2 Flow Computer

67

6.9OTHER INPUT(Continued)

OTHER INPUT

Setthelowscalevaluefortheanalogcurrentinputsignal(valuefor0or4mAinputcurrent).Thevalueenteredheremustbeidenticaltothevaluesetinthepressure,temperatureordensitytransmitter.

Input: Numberwithfixeddecimalpoint:-9999.99...+9999.99

Display: 32.00 of LOW SCALE VALUE

Setthefullscalevaluefortheanalogcurrentinputsignal(valuefor20mAinputcurrent).Thevalueenteredheremustbeidenticaltothevaluesetinthepressure,temperatureordensitytransmitter.


Display: 752.00 of FULL SCALE VALUE

Afixedvaluecanbedefinedfortheassignedvariable(pressure,temperature,density).Theflowcomputerwillusethisvalueinthefollowingcases: • Incaseoferror(i.e.defectivesensors).Theflowcomputer

willcontinuetooperateusingthevalueenteredhere. • if"MANUALTEMPERATURE","MANUALPRESSURE"or

"MANUALDENSITY"wasselectedfor"INPUTSIGNAL".


Display: 70.00 of DEFAULT VALUE

DefinetheSTPreferenceconditions(standardtemperatureandpressure)forthevariableassignedtotheinput.Presently,standardconditionsaredefineddifferentlydependingonthecountryandapplication.

Input: Numberwithfixeddecimalpoint: -9999.99...+9999.99

Display: 60.00 of STP REFERENCE

LOW SCALE VALUE

FULL SCALE VALUE

DEFAULT VALUE

STP REFERENCE

ST2 Flow Computer

68

OTHER INPUT6.9OTHER INPUT(Continued)

Entertheactualatmosphericpressure.Whenusinggaugepressuretransmittersfordetermininggaspressure,thereducedatmosphericpressureabovesealevelisthentakenintoaccount.

Input: Numberwithfloatingdecimalpoint: 0.0000...10000.0

Display: 1.013 bara BAROMETRIC PRESS.

Enterthetemperatureatwhichtheflowmeterwascalibrated.Thisinformationisusedinthecorrectionoftemperatureinducedeffectsontheflowmeterbodydimensions.

Input: Numberwithfixeddecimalpoint: -9999.99...+9999.99

Display: 68.00 of CALIBRATION TEMP.

BAROMETRIC PRESS.

CALIBRATION TEMP.

Thisfeatureisusedtoseethepresentvalueofthecompensationinputsignal.Thetypeofelectricalsignalisdeterminedbythecompensationinputsignaltypeselection.

Display: 20 mA VIEW INPUT SIGNAL

VIEW INPUT SIGNAL

EntertheTRAPERRORDELAY(coldtraperror)inHH:MMformat.AnalarmwillonlybeactivatedifthetrapisdetectedascontinuouslybeingintheabnormalstatesforatimeperiodgreaterthanthisTRAPERRORDELAYtime.

Display: HH:MM TRAP ERROR DELAY

TRAP ERROR DELAY

EntertheTRAPBLOWINGDELAY(trapstuckopen)inHH:MMformat.AnalarmwillonlybeactivatedifthetrapisdetectedascontinuouslybeingintheabnormalstatesforatimeperiodgreaterthanthisTRAPBLOWINGDELAYtime.

Display: HH:MM TRAP BLOWING DELAY

TRAP BLOWING DELAY

ST2 Flow Computer

69

6.10PULSE OUTPUT

PULSE OUTPUT

Assignthepulseoutputtoameasuredorcalculatedtotalizervalue.

Selection: HEATTOTAL,MASSTOTAL, CORRECTEDVOL.TOTAL, ACTUALVOLUMETOTAL

Display: ACTUAL VOLUME TOTAL

ASSIGN PULSE OUTPUT

ASSIGN PULSE OUT-PUT

ST2 Flow Computer

70

6.10PULSE OUTPUT(Continued)

PULSE OUTPUT

Thepulseoutputcanbeconfiguredasrequiredforanexternaldevice(i.e.remotetotalizer,etc.).

ACTIVE: Internalpowersupplyused(+24V).PASSIVE: Externalpowersupplyrequired.POSITIVE: Restvalueat0V(activehigh).NEGATIVE: Restvalueat24V(activelow)orexternal powersupply.

Active:

Passive:

Positive Pulse:

Negative Pulse:

Selection: PASSIVE-NEGATIVE,PASSIVE-POSITIVE, ACTIVE-NEGATIVE,ACTIVE-POSITIVE

Display: PASSIVE/POSITIVE

PULSE TYPE

24V

1234567813

12

Push-PullInternalPowerSupply

+

–

12345678

13

12

OpenCollector

24V ExternalPowerSupply

+

–

24

0 t

24

0 t

PULSE TYPE

ST2 Flow Computer

71

6.10PULSE OUTPUT(Continued)

PULSE OUTPUT

Definetheflowquantityperoutputpulse.Thisisexpressedinunitsperpulse(i.e.ft3/pulse).

Note: Ensurethatthemax.flowrate(fullscalevalue)andthe

pulsevalueenteredhereagreewithoneanother.Themax.possibleoutputfrequencyis50Hz.Theappropriatepulsevaluecanbedeterminedasfollows:

Pulsevalue> estimatedmax.flowrate(fullscale)/sec requiredmax.outputfrequencyInput: Numberwithfloatingdecimalpoint:0.001...10000.0

Display: 1.000 ft3/P PULSE VALUE

Setthepulsewidthrequiredforexternaldevices.Thepulsewidthlimitsthemax.possibleoutputfrequencyofthepulseoutput.Foracertainoutputfrequency,themaxpermissiblepulsewidthcanbecalculatedasfollows:

Pulsewidth< 1. 2•max.outputfrequency(Hz)Input: Numberwithfloatingdecimalpoint: 0.01...9.999s(seconds)

Display: .01 s PULSE WIDTH

Frequencysignalscanbesimulatedinordertocheckanyinstrumentthatisconnectedtothepulseoutput.Thesimulatedsignalsarealwayssymmetrical(50/50dutycycle).

Note: •Thesimulationmodeselectedaffectsthefrequencyoutput.

Theflowcomputerisfullyoperationalduringsimulation. •Simulationmodeisendedimmediatelyafterexitingthis

submenu.

Selection: OFF,0.0Hz,0.1Hz,1.0Hz,10Hz,50Hz

Display: OFF SIMULATION FREQ>

PULSE VALUE

PULSE WIDTH

SIMULATION FREQ.

ST2 Flow Computer

72

6.11CURRENT OUTPUT

CURRENT OUTPUT

Selectthecurrentoutputtobeconfigured.Theflowcomputerofferstwocurrentoutputs.

Selection: 1(Currentoutput1) 2(Currentoutput2)

Display: 1 SELECT OUTPUT

Assignavariabletothecurrentoutput.

Selection: HEATFLOW,MASSFLOW, COR.VOLUMEFLOW,VOLUMEFLOW, TEMPERATURE,TEMPERATURE2, DELTATEMPERATURE,PRESSURE,DENSITY,PEAK

DEMAND,DEMANDLASTHOUR

Display: VOLUME FLOW ASSIGN CURRENT OUT.

Definethe0or4mAlowscalecurrentvalue.Thecurrentforthescaledfullscalevalueisalways20mA.

Selection: 0-20mA,4-20mA,NOTUSED

Display: 4-20 mA CURRENT RANGE

Setthelowscalevaluetothe0or4mAcurrentsignalforthevariableassignedtothecurrentoutput.

Input: Numberwithfloatingdecimalpoint:-999999...+999999

Display: .000 ft3/h LOW SCALE VALUE

Setthefullscalevaluetothe20mAcurrentsignalforthevariableassignedtothecurrentoutput.

Input: Numberwithfloatingdecimalpoint: -999999...+999999


SELECT OUTPUT

ASSIGN CURRENT OUT

CURRENT RANGE

LOW SCALE

FULL SCALE

ST2 Flow Computer

73

6.11CURRENT OUTPUT(Continued)

CURRENT OUTPUT

Selectthetimeconstanttodeterminewhetherthecurrentoutputsignalreactsquickly(smalltimeconstant)orslowly(largetimeconstant)torapidlychangingvalues(i.e.flowrate).Thetimeconstantdoesnotaffectthebehaviorofthedisplay.

Input: Max.2digitnumber:0...99

Display: 1 TIME CONSTANT

Displaytheactualvalueofthecurrentoutput.

Display: 0.000 mA CURRENT OUT VALUE

Variousoutputcurrentscanbesimulatedinordertocheckanyinstrumentswhichareconnected.

Note: •Thesimulationmodeselectedaffectsonlytheselected

currentoutput.Theflowcomputerisfullyoperationalduringsimulation.

•Simulationmodeisendedimmediatelyafterexitingthissubmenu.

Selection:

OFF,0mA,2mA,4mA,12mA,20mA,25mA

Display: OFF SIMULATION CURRENT

TIME CONSTANT

CURRENT OUT VALUE

SIMULATION CURRENT

ST2 Flow Computer

74

RELAYS6.12RELAYS

Setrelayoutputtobeconfigured.Twoorthreerelayoutputsareavailable.

Selection:

1(Relay1) 2(Relay2) 3(Relay3,optional)Display: 1 SELECT RELAY

Bothrelays(1and2,andoptional3rdrelay)canbeassignedtovariousfunctionsasrequired:

Alarm functionsRelaysactivateuponexceedinglimitsetpoints.Freelyassignabletomeasuredorcalculatedvariablesortotalizers.

MalfunctionIndicationofinstrumentfailure,powerloss,etc.

Pulse outputTherelayscanbedefinedasadditionalpulseoutputsfortotalizervaluessuchasheat,mass,volumeorcorrectedvolume.

Wet steam alarmTheflowcomputercanmonitorpressureandtemperatureinsuperheatedsteamapplicationscontinuouslyandcomparethemtothesaturatedsteamcurve.Whenthedegreeofsuperheat(distancetothesaturatedsteamcurve)dropsbelow5°C,therelayswitchesandthemessage"WETSTEAMALARM"isdisplayed.

NOTE:Relay response time is affected by the value entered for display damping. The larger the display damping value, the slower the relay response time will be. This is intended to prevent false triggering of the relays. Enter a display damping factor of zero (0) for fastest relay response time.

Selection:Differentselectionsareavailabledependingontheflowequationandtypeoftransmitterselected.

HEATTOTAL,MASSTOTAL, CORRECTEDVOL.TOTAL, ACTUALVOLUMETOTAL,HEATFLOW, MASSFLOW,COR.VOL.FLOW, VOLUMEFLOW,TEMPERATURE, TEMPERATURE2,DELTATEMPERATURE,PRESSURE,

DENSITY,WETSTEAMALARM,MALFUNCTION,PEAKDEMAND,DEMANDLASTHOUR

Display: VOLUME FLOW RELAY FUNCTION

SELECT RELAY

RELAY FUNCTION

ST2 Flow Computer

75

Setwhenandhowtherelaysareswitched"ON"and"OFF".Thisdefinesboththealarmconditionsandthetimeresponseofthealarmstatus.

Selection:

HIALARM,FOLLOW LOALARM,FOLLOW HIALARMLATCH LOALARMLATCH RELAYPULSEOUTPUT

Note: •Forrelayfunctions"MALFUNCTION"and"WETSTEAM

ALARM".Thereisnodifferencebetweenthemodes"HI......"and"LO......":

(i.e.HIALARMFOLLOW=LOALARMFOLLOW, HIALARMLATCH=LOWALARMLATCH)

•Relaymode"RELAYPULSEOUTPUT"definestherelayasanadditionalpulseoutput.

Display: HI ALARM, FOLLOW RELAY MODE

Afterconfiguringarelayfor"Alarmindication"(limitvalue),therequiredsetpointcanbesetinthissubmenu.Ifthevariablereachesthesetvalue,therelayswitchesandthecorrespondingmessageisdisplayed.Continuousswitchingnearthesetpointcanbepreventedwiththe"HYSTERESIS"setting.

Note: •Besuretoselecttheunits(SYSTEMUNITS)before

enteringthesetpointinthissubmenu. •Normallyopenornormallyclosedcontactsaredetermined

whenwiring.

Input:

Numberwithfloatingdecimalpoint:-999999...+999999

Display: 99999.0 ft3/h LIMIT SETPOINT 1

RELAY MODE

LIMIT SETPOINT

6.12RELAYS(Continued)

RELAYS

ST2 Flow Computer

76

Definetheflowquantityperoutputpulseiftherelayisconfiguredfor"RELAYPULSEOUTPUT"..Thisisexpressedinunitsperpulse(i.e.ft3/pulse).

Note: Ensurethatthemax.flowrate(fullscalevalue)andthe

pulsevalueenteredhereagreewithoneanother.Themax.possibleoutputfrequencyis5Hz.Theappropriatepulsevaluecanbedeterminedasfollows:

Pulsevalue> estimatedmax.flowrate(fullscale)/sec requiredmax.outputfrequencyInput: Numberwithfloatingdecimalpoint:0.001...1000.0

Display: 1.000 ft3/P PULSE VALUE

Enterthepulsewidth.Twocasesarepossible:

Case A: Relay set for "MALFUNCTION" or limit valueTheresponseoftherelayduringalarmstatusisdeterminedbyselectingthepulsewidth. •Pulsewidth=0.0s(Normalsetting) Relayislatchedduringalarmconditions. •Pulsewidth=0.1...9.9s(specialsetting) Relaywillenergizeforselectedduration,independentof

thecauseofthealarm.Thissettingisonlyusedinspecialcases(i.e.foractivatingsignalhorns).

Case B: Relay set for "RELAY PULSE OUTPUT"Setthepulsewidthrequiredfortheexternaldevice.Thevalueenteredherecanbemadetoagreewiththeactualflowamountandpulsevaluebyusingthefollowing:

Pulsewidth< 1. 2•max.outputfrequency(Hz)Input: Numberwithfloatingdecimalpoint: 0.01...9.99s(pulseoutput) 0.00...9.99s(allotherconfigurations)

Display: .01 s PULSE WIDTH

PULSE VALUE

PULSE WIDTH


RELAYS

ST2 Flow Computer

77


RELAYS

Enterahysteresisvaluetoensurethatthe"ON"and"OFF"switchpointshavedifferentvaluesandthereforepreventcontinualandundesiredswitchingnearthelimitvalue.

Input: Numberwithfloatingdecimalpoint: 0.000...999999

Display: 0.000 psia HYSTERESIS

Thealarmstatusfortheparticularrelaycanbecancelledhereif(forsafetyreasons)thesetting"......,LATCH"hasbeenselectedinthesubmenu"RELAYMODE".Thisensuresthattheuserisactivelyawareofthealarmmessage.

Note: •WhenintheHOMEposition,presstheENTERkeyto

acknowledgeandclearalarms. •Thealarmstatuscanonlybepermanentlycancelledifthe

causeofthealarmisremoved.

Selection: RESETALARM?NO RESETALARM?YES

Display: RESET? NO RESET ALARM

Asanaidduringstart-up,therelayoutputmaybemanuallycontrolledindependentofit'snormalfunction.

Selection:

NORMAL,ON,OFF

Display: NORMAL SIMULATE RELAY

HYSTERESIS

RESET ALARM

SIMULATE RELAY

ST2 Flow Computer

78

TheflowcomputercanbeconnectedviaRS-232interfacetoapersonalcomputerorprinter.

Selection: COMPUTER,PRINTER,MODEM

Display: COMPUTER RS-232 USAGE

EntertheuniqueunitI.D.tagnumberfortheflowcomputerifanumberofflowcomputersareconnectedtothesameinterface.

Selection: Max.2digitnumber:0...99

Display: 1 DEVICE ID

Enterthebaudrateforserialcommunicationbetweentheflowcomputerandapersonalcomputer,modem,orprinter.

Selection: 9600,2400,1200,300

Display: 9600 BAUD RATE

Selectthedesiredparity.Thesettingselectedheremustagreewiththeparitysettingforthecomputer,modem,orprinter.

Selection: NONE,ODD,EVEN

Display: NONE PARITY

Thecontrolofdataflowcanbedefined.Thesettingrequiredisdeterminedbythehandshakingoftheprinter.

Selection: NONE,HARDWARE

Display: NONE HANDSHAKE

RS-232 USAGE

DEVICE ID

BAUD RATE

PARITY

HANDSHAKE

COMMUNICATION6.13COMMUNICATION(Continued)

ST2 Flow Computer

79

SelectthevariablesorparameterswhicharetobeloggedorprintedviatheRS-232interface.

Selection (Procedure): CHANGE?NO CHANGE?YES

IfYESselected,theavailablevariablesaredisplayedoneafteranother.Onlysomeofthefollowingoptionsareavailabledependingontheflowequationselected:

Storeoption Print?advancetonext

PRINTHEADER? NO(YES)INSTRUMENTTAG? NO(YES)FLUIDTYPE? NO(YES)TIME? NO(YES)DATE? NO(YES)TRANSACTIONNO.? NO(YES)HEATFLOW? NO(YES)HEATTOTAL? NO(YES)HEATGRANDTOTAL? NO(YES)MASSFLOW? NO(YES)MASSTOTAL? NO(YES)MASSGRANDTOTAL? NO(YES)COR.VOLUMEFLOW? NO(YES)COR.VOL.GRANDTOTAL? NO(YES)VOLUMEFLOW? NO(YES)VOLUMETOTAL? NO(YES)VOL.GRANDTOTAL? NO(YES)TEMPERATURE? NO(YES)TEMPERATURE2? NO(YES)DELTATEMPERATURE? NO(YES)PROCESSPRESSURE? NO(YES)DENSITY? NO(YES)SPEC.ENTHALPY? NO(YES)DIFF.PRESSURE? NO(YES)ERRORS? NO(YES)ALARMS? NO(YES)PEAKDEMAND? NO(YES)DEMANDLASTHOUR? NO(YES)PEAKTIMESTAMP? NO(YES)PEAKDATESTAMP? NO(YES)TRAPMONITOR? NO(YES)

"YES"+ENTER:Parameterisaddedtotheprintlist"NO"+ENTER:parameterisnotprinted

Afterthelastoptionthedisplayadvancestothenextsubmenu.

PRINT LIST


ST2 Flow Computer

80

PRINT INITIATE

DATALOG ONLY

PRINT INTERVAL

PRINT TIME

DATALOG FORMAT


Dataloggerand/orprintingvariablesandparametersovertheserialRS-232interfacecanbeinitiatedatregularintervals(INTERVAL)ordailyatafixedtime(TIMEOFDAY)orbyfrontkeydepression.

Note:PrintingcanalwaysbeinitiatedbypressingthePRINTkey.

Selection: NONE,TIMEOFDAY,INTERVAL,ENABLEPRINTKEY

Display: TIME OF DAY PRINT INITIATE

SelectYESorNOforDatalogOnlyprompt.

Selection: YES-Dataisloggedbutnoinformationissentonprintevent. NO-Dataisloggedandimmediatelytransmitted.

Display: YES DATALOG ONLY

Defineatimeinterval.Variablesandparameterswillbeperiodicallyloggedatregularintervalsofthisvalueoftime.Thesetting"00:00"deactivatesthisfeature.

Input: Timevalueinhours&minutes(HH:MM).

Display: 00:00 PRINT INTERVAL

Definethetimeofdaythatvariablesandparameterswillbeloggedoutdaily.

Input: Timeofdayinhours&minutes(HH:MM).

Display: 00:00 PRINT TIME

DefinetheDatalogFormat.

Selection:DATABASE- Datasetssentincommaseperatedvariable

format.PRINTER- Individualoutputvariablessentwithtext

labelandunitssuitableforprinting.

Display: PRINTER DATALOG FORMAT

ST2 Flow Computer

81


SelectYESorNOforModemControl.

Selection:YES- Modeminitializationanddialingcommandsaresent

duringtransactions.NO- ModeminitializationanddialingcommandsareNOT

sentduringtransactions.

Display: YES MODEM CONTROL

SelectYESorNOforDeviceMaster

Selection:YES- Setssolemasterdeviceresponsibleforinitializing

modem.NO- Devicewillnotbeusedtoinitializemodem.

Display: YES DEVICE MASTER

MODEM CONTROL(Modem)

DEVICE MASTER(Modem)

SelectYESorNOforSendInc.Tot.Only

Selection:YES- UnitwillsendInc.Tot.OnlyNO- UnitwillnotsendInc.Tot.Only

Display: YES SEND INC. TOT. ONLY

EntermultiplyingfactorforIncOnlyScaler

Selection: X1,X10,X100,X1000

Display: X1 INC ONLY SCALER

SelectYESorNOforClearDatalog

Selection:YES- UnitwilcleardatalogcontentsNO- Unitwillnotcleardatalogcontents

Display: YES CLEAR DATALOG

SEND INC. TOT. ONLY

INC ONLY SCALER

CLEAR DATALOG

ST2 Flow Computer

82


EntertheNumberOfRedialsdesiredintheeventofabusysignalorcommunicationproblem.Input: max.2digitnumber

Display: 3 NUMBER OF REDIALS

NUMBER OF REDIALS(Modem)

SelectYESorNOforCallOnErrorprompt.

Selection:YES- UnitwillcallouttoremotePCifadesignatedCSI

erroroccurs.NO- UnitwillnotcallouttoremotePCiferroroccurs.

Display: YES CALL ON ERROR

CALL ON ERROR(Modem)

SelectYESorNOforModemAutoAnswer

Selection:YES- Modemwillanswerincomingcalls.NO- Modemwillnotanswerincomingcalls.

Display: YES MODEM AUTO ANSWER

DefineaCallOutNumber.Enterthetelephonenumber,oremailaddresstobecalled.

Input: max.16digitphonenumber

Display: ### ### ### ### #### CALL OUT NO

DefinetheCallOutTime.Enterscheduledcallouttime(24hrformat),ifyouwanttheunittocallouttoaremotePC.

Input: Timeofdayinhours&minutes(HH:MM).

Display: 00:00 CALL OUT TIME

MODEM AUTO ANSWER(Modem)

CALL OUT NO(Modem)

CALL OUT TIME(Modem)

ST2 Flow Computer

83


SelectYESorNOforHangUpIfInactive

Selection:YES- UnitwillhangupifremotePCfailstorespondwithin

severalminutesafterconnectionisestablished.NO- UnitwillnothangupifremotePCfailstorespond

afterconnectionisestablished.

Display: YES HANG UP IF INACTIVE

HANG UP IF INACTIVE(Modem)

ST2 Flow Computer

84

IfYESselected,definetheconditionsthatyouwishtocallouton.Thepossibleconditionsaredisplayedoneafteranother.

Storeoption Change?advancetonextPOWERFAILURE NO(YES)WATCHDOGTIMEOUT NO(YES)COMMUNICATIONERROR NO(YES)CALIBRATIONERROR NO(YES)PRINTBUFFERFULL NO(YES)TOTALIZERERROR NO(YES)WETSTEAMALARM NO(YES)OFFFLUIDTABLE NO(YES)FLOWINOVERRANGE NO(YES)INPUT1OVERRANGE NO(YES)INPUT2OVERRANGE NO(YES)FLOWLOOPBROKEN NO(YES)LOOP1BROKEN NO(YES)LOOP2BROKEN NO(YES)RTD1OPEN NO(YES)RTD1SHORT NO(YES)RTD2OPEN NO(YES)RTD2SHORT NO(YES)PULSEOUTOVERRUN NO(YES)Iout1OUTOFRANGE NO(YES)Iout2OUTOFRANGE NO(YES)RELAY1HIGHALARM NO(YES)RELAY1LOWALARM NO(YES)RELAY2HIGHALARM NO(YES)RELAY2LOWALARM NO(YES)RELAY3HIGHALARM NO(YES)RELAY3LOWALARM NO(YES)TRAPERROR NO(YES)TRAPBLOWING NO(YES)INPUT3OVERRANGE NO(YES)INPUT3BROKEN NO(YES)24VDCOUTERROR NO(YES)PULSEINERROR NO(YES)INPUT1VinERROR NO(YES)INPUT1IinERROR NO(YES)INPUT2IinERROR NO(YES)INPUT2RTDERROR NO(YES)INPUT3IinERROR NO(YES)INPUT3RTDERROR NO(YES)PULSEOUTERROR NO(YES)Iout1ERROR NO(YES)Iout2ERROR NO(YES)RELAY1ERROR NO(YES)RELAY2ERROR NO(YES)RS-232ERROR NO(YES)A/DMALFUNCTION NO(YES)PROGRAMERROR NO(YES)SETUPDATALOST NO(YES)TIMECLOCKLOST NO(YES)DISPLAYMALFUNCTION NO(YES)RAMMALFUNCTION NO(YES)DATALOGLOST NO(YES)

SelectYESorNOforChangeErrorMask?prompt

Selection: YES,NO

Display: 00:00 CALL OUT TIME

ERROR MASK(Modem)


ST2 Flow Computer

85

TheflowcomputercanbeconnectedviaRS-485interfacetoapersonalcomputerandcommunicateviaModbusRTUprotocol.

Selection: MODBUSRTU

Display: MODBUS RTU PROTOCOL

EntertheuniqueunitI.D.tagnumberfortheflowcomputerifanumberofflowcomputersareconnectedtothesameinterface.

Selection: 3digitnumber:1...247

Display: 1 DEVICE ID

Enterthebaudrateforserialcommunicationbetweentheflowcomputerandapersonalcomputer.

Selection: 19200,9600,4800,2400,1200,600,300

Display: 9600 BAUD RATE

Selectthedesiredparity.Thesettingselectedheremustagreewiththeparitysettingforthecomputer.

Selection: NONE,ODD,EVEN

Display: NONE PARITY

PROTOCOL

DEVICE ID

BAUD RATE

PARITY

NETWORK CARD6.14NETWORKCARD

ST2 Flow Computer

86

Twocounterscontainthenumberoftimesthecalibrationand/orconfigurationparametershavebeenchanged.Changesinimportantcalibrationandconfigurationdataareregisteredanddisplayed("electronicstamping").Thesecountersadvanceautomatically.Thesecounterscannotberesetsothatunauthorizedchangescanbeidentified.

Example: CAL015CFG076

Display: CAL 015 CFG 076 EXAMINE AUDIT TRAIL

Alistoferrorsthathaveoccurredcanbeviewedandcleared.

Selection: VIEW?NO VIEW?YES

If"YES"isselectedtheerrorlogcanbeviewedanderrorsindividuallycleared(ifeditingenabledwithServiceCode).

Display: CLEAR? NO POWER FAILURE

Displaythesoftwareversionoftheflowcomputer.(Contactlocalagentforupgradeinformation)

Example: 02.00.14

Display: 02.00.14 SOFTWARE VERSION

Displaythehardwareversionoftheflowcomputer.(Contactlocalagentforupgradeinformation)

Example: 01.00.01

Display: 01.00.01 HARDWARE VERSION

EXAMINE AUDIT TRAIL

ERROR LOG

SOFTWARE VERSION

HARDWARE VERSION

SERVICE & ANALYSIS6.15SERVICE & ANALYSIS

ST2 Flow Computer

87

SERVICE & ANALYSIS6.15SERVICE & ANALYSIS(Continued)

Thisfeatureallowsthecalibrationoftheunitsinputsandoutputs.

CAUTION: Thecalibrationshouldonlybeperformedbyqualifiedtechnicians.ThecalibrationprocedurerequirestheuseofprecisionVoltage&Currentsources,afrequencygenerator,a100Ωresistor(±0.1%),anammeter,anohmmeterandafrequencycounter.Ifcalibrationfails,usethe"RestoreFactoryCalibration"feature.

Selection: NO,YES

Display: PERFORM? YES CALIBRATION

Connectyourvoltagesourceto(+)Pin2and(-)Pin4.

Apply0.0Volts.Pressentertolearn0.0Volts.

Display: RESULT: 0.000 V LEARN 0.0 V PIN 2

Apply10.0Volts.Pressentertolearn10.0Volts.

Display: RESULT: 10.000 V LEARN 10.0 V PIN 2

Connectyourcurrentsourceto(+)Pin2and(-)Pin4.

Apply0.0mA.Pressentertolearn0.0mA.

Display: RESULT: 0.000 mA LEARN 0.0 mA PIN 2








PERFORM CALIBRATION

NOTE: Thismenuitemwillonlyappearifeditingisen-abledwithServiceCode.

VOLTAGE INPUTCALIBRATION

LEARN 0.0 V

(Pin 2)

LEARN 10.0 V(Pin 2)

CURRENT INPUT CALIBRATION

LEARN 0.0 mA (Pin 2)

LEARN 20.0 mA

(Pin 2)


LEARN 20.0 mA

(Pin 3)

ST2 Flow Computer

88












Connecta100ΩresistorbetweenPins6&7andplaceajumperwirebetweenPins5&6.

PressentertolearnRTDresistanceonPins5,6&7.

Display: RESULT: 100.00 ohm LEARN RTD PIN 5-6-7

Connecta100ΩresistorbetweenPins10&11andplaceajumperwirebetweenPins9&10.

PressentertolearnRTDresistanceonPins9,10&11.

Display: RESULT: 100.00 ohm LEARN RTD PIN 9-10-11

CURRENT INPUT CALIBRATION (continued)


LEARN 20.0 mA

(Pin 7)

LEARN 0.0 mA

(Pin 11)


RTD INPUT CALIBRATION

TemperatureInput

(Pins 5, 6 & 7)

Temperature 2Input

(Pins 9, 10 & 11)

ST2 Flow Computer

89


ConnectyourAmmeter(currentmeter)to(+)Pin14and(-)Pin16.

Observethereadingontheammeter.Usingthenumerickeys,entertheactualreading(inmA)andpressenter.

Display: ACTUAL? 4.025 mA ADJ 4mA PIN 14-16



ConnectyourAmmeter(currentmeter)to(+)Pin15and(-)Pin16.





Connectyourfrequencymeterto(+)Pin12and(-)Pin13.Thisfeatureisusedtocheckthepulseoutput.Calibrationisnotperformed.

Selection: OFF,50Hz,10Hz,1.0Hz,0.1Hz,0.0Hz

Display: OFF SIMULATION FREQ.

ANALOG OUTPUT 1CALIBRATION (Pins 14 & 16)

ADJ 4 mA

(Pins 14 & 16)

ADJ 20 mA

(Pins 14 & 16)

ANALOG OUTPUT 2CALIBRATION (Pins 15 & 16)

ADJ 4 mA

(Pins 15 & 16)

ADJ 20 mA

(Pins 15 & 16)

FREQUENCY OUTPUT SIMULATION(Pins 12 & 13)

ST2 Flow Computer

90


Usingtheohmmeter,checkcontinuitybetweenpins(17&18)and18&19whileturningON&OFFRelay1usingtheup/downarrowkeys.Pressenterwhentestiscompleted.

Display: RELAY 1: OFF TEST RELAY 1

Usingtheohmmeter,checkcontinuitybetweenpins20&21and(21&22)whileturningON&OFFRelay2usingtheup/downarrowkeys.Pressenterwhentestiscompleted.


Usingtheohmmeter,checkcontinuitybetweenpins19&20whileturningON&OFFRelay2usingtheup/downarrowkeys.Pressenterwhentestiscompleted.


Usingthefrequencygenerator,applyafrequencyto(+)Pin2and(-)Pin4.Comparethedisplayedfrequencywiththeinputfrequency.

Display: 0.000 Hz INPUT FREQUENCY

Thecalibrationprocedureiscomplete.YoumaynowchoosetosavethiscalibrationastheFactoryCalibration.

Display: NO SAVE AS FACTORY CAL.

IfyouarenotsatisfiedwiththecalibrationresultsyoucanrestorethelastsavedFactoryCalibration.

Display: NO RESTOR FACT. CALIB.

Thisfeatureallowsyoutoenterthenextdateyouwouldliketheunittobecalibrated.Thisisveryusefulwhencomponentsmustbeperiodicallycalibrated.ThisdateisincludedonPrintMaint.andSetupReports.

Display: 10 DEC 1999 NEXT CALIBRATION

ThisfeatureallowsyoutotransmitamaintenancereportovertheRS-232portforprintout.Thereportincludeserrormessagesandcalibrationinformation

Display: NO PRINT MAINT. REPORT

RELAY TEST

RELAY 1TEST

(Pins 17, 18 & 19)

RELAY 2TEST

(Pins 20, 21 & 22)

RELAY 3TEST

(Pins 19 & 20)

PULSE INPUT TEST

INPUTFREQUENCY

(Pins 2 & 4)

SAVE AS FACTORY CALIBRATION

RESTORE FACTORY CALIBRATION

SET NEXT CALIBRATION DATE

PRINT MAINT. REPORT

ST2 Flow Computer

91

Thisfeatureallowstheunitssetupparameterstobeprintedtoaconnectedprinter.

Display: NO PRINT SYSTEM SETUP

Thisfeaturestartstheself-testoftheflowcomputer.AtestisinternallyconductedontheEEPROM,A/DConverter,Time/Dateclock,Displayandseveralotherhardwarecircuits.

Display: RUN? NO SELF CHECK

TheServiceTestrequiresaspecialcalibrationapparatusthatconnectstotherearterminalsoftheunit.Thisisusedtodeterminewhethertheflowcomputerorthefieldwiringisfaulty.Thecalibrationapparatusmaybepurchasedfromyourlocaldistributor.

Display: RUN? NO SERVICE TEST

PRINT SYSTEM SETUP

SELF CHECK

SERVICE TEST(Notavailablewith3Relayoption)

NOTE:ThiswillonlyappearifeditingisenabledwiththeServiceCode.


ST2 Flow Computer

92

7. Principle Of Operation

7.1 General:

TheST2FlowComputerusesseveralinternalcalculationstocomputethecompensatedflowbasedonspecificdatainput.Severalcomputationsareperformedtoarriveattheuncompensatedflow,temperature,pressure,densityandviscosity.ThisinformationisthenusedtocomputetheCorrectedVolumeFlow,MassFloworHeatFlow.

7.2 Square Law Flowmeter Considerations:

Headclassflowmetersaresuppliedbythemanufacturerswitha4-20mAoutputspanwhichisalreadyinflowunits.TheST2permitstheusertoenterthisflowmeterinfor-mationdirectly.However,closelyassociatedwiththisinformationisthedensitythatwasassumedduringflowmetercalibration.Thisinformationmustalsobeinputiftheuseristoobtainmaximumaccuracy. Itisassumedthattheuserhastheprintoutfromastandardizedsizingprogramfortheparticulardevicehewillbeusing.Suchstandardizedprintoutslistallthenecessaryinformationwhichtheuserwillthenbepromptedfor.

SeveralspecializedflowequationsarelistedthatarenotintendedforthestandardunitbuttobeofferedtoappropriateOEMsorasspecialorderitems.Thesearedesig-natedbya“†”.

Note concerning Fluid InformationTheuserwillbepromptedforFluidInformationduringthesetupoftheinstrument.SeeAppendixAforthepropertiesofseveralcommonfluids.

7.3 Flow Equations:

Flow Input Computation:

Linear InputFlow=[%inputspan•(flowFS-flowlowscale)]+flowlowscale

Square Law without External SQRT Extractor deltaP=[(%inputspan)•(flowFS-flowlowscale)]+flowlowscale

Square Law with External SQRT Extractor deltaP=[(%inputspan)2•(flowFS-flowlowscale)]+flowlowscale

NOTE:Forstackeddifferentialpressureoption,theappropriateinputsensorsignalisusedincalculationsatalltimestomaximizeaccuracy.

General Operation

Square Law FlowmeterConsiderations

Flow Equations

7.3.1 Flow InputComputation

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Pressure Input:

General Case Pf=[%inputspan•(Presfullscale-Preslowscale]+Preslowscale

Gauge Case Pf=Pf+Barometric

Manual Case or In Event of Fault Pf=PressureDefaultValue

Temperature Computation:

General Case Tf=[%inputspan•(Tempfullscale-Templowscale]+Templowscale

RTD Case Tf=f(measuredinputresistance)

Manual Case or In Event of Fault Tf=TemperatureDefaultValue

Delta Temp Case DeltaTemp=T2-T1 Flowmeterlocation=cold DeltaTemp=T1-T2 Flowmeterlocation=hot

Density Computation:

Water Case density_water=density(Tf)

Liquid Case density=referencedensity•(1-Therm.Exp.Coef.•(Tf-Tref))2

Steam Case density=1/specificvolume(Tf,Pf)

Gas Case Pf (Tref+273.15) Zref density=referencedensity• • • Pref (Tf+273.15) Zf NOTE: ForNaturalGas:

isdeterminedbyNX-19whenthisselectionissuppliedandselected.

NOTE: Therm.Exp.Coefis(x10-6)

7.3.2 Pressure Computation

7.3.3Temperature Computation

7.3.4Density/ViscosityComputation

Zref

Zf

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7.3.4Density/ViscosityComputation(continued)

7.3.5 Corrected Volume FlowComputation

Viscosity (cP) Computation:

Liquid Case NOTE: B viscosity(incP) cPviscosity=A•exp ViscositycS= flowingdensity (Tf+459.67) densityofwater@4°C

Gas Case

cPviscosity=A•(Tf+459.67)B

Steam Case

cPviscosity=f(Tf,Pf)

Corrected Volume Flow Computation:

Liquid Case std.volumeflow=volumeflow•(1-Therm.Exp.Coef.•(Tf-Tref))2

Gas Case std.volumeflow= volumeflow•Pf. • (Tref+273.15) • Zref . Pref (Tf+273.15) Zf

NOTE:ForNaturalGas:

Zref . Zf

isdeterminedbyNX-19whenthisselectionissuppliedandselected.

Natural Gas NX-19 Equation:TheNX-19(1963)naturalgasstateequationsarewidelyusedincustodytransferapplications.Overmostnormalmeasurementranges,500to5000psia(3.5to10.4MPa)and-10to100°F(-23to38°C),theNX-19equationwillcomputethegascompressibilityfactortowithin0.2%ofthevaluescomputedbythenewerAGA-8stateequa-tion.TherangesoverwhichtheNX-19equationappliesare: PressurePG To5000psig(10.34MPagauge) TemperatureTf -40to240°F(-40to116°C) SpecificGravityG 0.554to1.0 CO2andN2 0to15%

OurFlowComputerusestheSpecificGravitymethodtofirstobtaintheadjustedtemperatureandpressurebeforeenteringthestateequation.Thismethodcalculatestheadjustedpres-sureandtemperaturefromthemolefractionsofcarbondioxideandnitrogenas

Padj= 156.47PG . psig 160.8–7.22Gg+100XC02–39.2XN2

WhereXC02andXN2arethemolefractionsofcarbondioxideandnitrogen,respectively.Theadjustedtemperatureisdefinedby Tadj= 226.29(TF+460) °F 99.15+211.9Gg–100XC02–168.1XN2

( )

ST2 Flow Computer

95

Aftercalculatingtheadjustedpressureandtemperature,themixture’spressureandtempera-ture correlations parametersarecalculatedby P= P adj +14.7 T= T adj . 1000 500Thecompressibilityfactoristhencalculatedbyfirstdetermining

m=0.0330378T -2–0.0221323T -3+0.0161353T -5 n =(0.265827T -2+0.0457697T -4–0.133185T -1)m -1 B =3–mn2

9mp2

b = 9n–2mn3 – E . 54mp2 2mp2

D=[b+(b 2+B3)0.5]1/3

WhereEisafunctionofthepressurep andtemperatureTcorrelationparameters.TheequationsforEaregiveninthefollowingtableforthedesignatedregions.ThefollowingcompressibilityZf isdeter-minedby Zf = 1 . B / D –D +n / 3p

NX-19NaturalGasRegionsandE Equations

Ranges P T E 0to2 1.09to1.40 E1 0to1.3 0.84to1.09 E2 1.3to2.0 0.88to1.09 E3 1.3to2.0 0.84to0.88 E4 2.0to5.0 0.84to0.88 E5 2.0to5.0 0.88to1.09 E6 2.0to5.0 1.09to1.32 E7 2.0to5.0 1.32to1.40 E8

Ta =T –1.09 Tb =1.09–TE1 =1–0.00075p2.3 exp(-20Ta)–0.0011Ta

0.5p2(2.17+1.4Ta0.5– p)2

E2 =1–0.00075p2.3[2–exp(-20Tb)]–1.317Tb4p(1.69–p2)

E3 =1–0.00075p2.3[2–exp(-20Tb)]+0.455(200Tb6–0.03249Tb

+2.0167Tb2–18.028Tb

3+42.844Tb4)(p–1.3)[1.69(2)1.25– p2]

E4 =1–0.00075p2.3[2–exp(-20Tb)]+0.455(200Tb6–0.03249Tb

+2.0167Tb2–18.028Tb

3+42.844Tb4)(p–1.3)[1.69(2)1.25+80(0.88–t)2– p2]

E5 =E4 –X E6 =E3 –X E7 =E1 –X E8 =E7 –X1X =A (T–2)+A1(p –2)2+A2(p–2)3+A3(p–2)4X1 =(p –1.32)2(p–2)[3–1.483(p –2)–0.1(p–2)2+0.0833(p –2)3]A =1.7172–2.33123T –1.56796T2+3.47644T3–1.28603T4 A1 =0.016299–0.028094T –0.48782T2 –0.78221T3+0.27839T4

A2 =–0.35978+0.51419T+0.165453T2–0.52216T3+0.19687T4

A3 =0.075255–0.10573T–0.058598T2+0.14416T3–0.054533T4

WhenNX-19isusedforcustodytransferapplications,thebasecompressibilityfactoriscalculatedby:

Zb=(1+ 0.00132)-2 T 3.25

7.3.5 Corrected Volume FlowComputation(continued)

Mass Flow Computations:

massflow=volumeflow•density

Combustion Heat Flow Computations:

combustionheatflow=massflow•combustionheatingvalue

7.3.6Mass FlowComputation

7.3.7Comb. Heat FlowComputation

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96

∆p27.7 • p f

R = 1 –

κ − 11 −β4) •( κ • R2/κ • (1 - R(κ−1)/κ

)

[(1 −(β •4 R )) • (1 - R)]2/κY =

= 1.0Y

Sensible Heat Flow:

Special Case for Water heatflow=massflow(Tf)•enthalpy(Tf)

Liquid Delta Heat:

General Case heatflow=massflow•specificheat•(T2-Tf)

Water Case heatflow=massflow(Tf)•[enthalpy(T2)-enthalpy(Tf)]

Expansion Factor Computation for Square Law Flowmeters:InthefollowingEquations,deltaPisassumedin("H2O),PfisinPSIA,27.7isaPSIAto("H2O)unitsconversion.

Liquid Case Y=1.0

Gas, Steam Case

Orifice Case deltaP Y=1.0-(0.41+0.35•B4)• isentropicexponent•Pf•27.7

V-Cone, Venturi, Flow Nozzle, Wedge Case:

NOTE: AnequivalentformulaisusedbyV-Coneflowmetertypes. Target, Annubar, Pitot Case:

7.3.9Sensible Heat FlowComputation

7.3.10Liquid Delta HeatComputation

7.3.11Expansion Factor Computation for Square Law Flow-meters

Heat Flow Computation:

Steam Heat heatflow=massflow•totalheatsteam(Tf,Pf)

Steam Net Heat heatflow=massflow•[totalheatsteam(Tf,Pf)-heatsaturatedwater(Pf)]

Steam Delta Heat heatflow=massflow•[totalheatsaturatedsteam(Pf)-heatwater(Tf)]

7.3.8Heat FlowComputation

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Verabar Case

( ) )73.27

()1(4191.18093.1 2

Γ⋅⋅⋅−−+=

fa

wv P

hY β

Where:

β = The sensor blockage = D

Pw

⋅⋅

π4

π = 3.14159 D = Internal pipe diameter in inches.

wP = The sensor's probe width in inches.

wP = 0.336” for a -05 sensor.



wh = Verabar differential pressure in inches of H2O.

faP = Absolute static pressure (high side of the Verabar) in psia.

Γ = k = Isentropic exponent for a real gas or steam.

Accelabar Case

Γ⋅⋅

⋅−= −fta

wcoefaa P

hYY

73.271

Where:

aY = General Accelerator gas expansion factor (dimensionless)

coefaY − = Accelabar gas expansion factor coefficient (dimensionless)

wh = Differential pressure (inches H2O @ 68°F)

ftaP = Flowing Accelerator Throat Pressure (psia)

= Flowing throat pressure in psig + atmospheric pressure in psi Γ = Isentropic Exponent for a real gas or steam

Accelabar Size

coefaY −

3” 0.7432 4” 0.6986 6” 0.6865 8” 0.6407

10” 0.6095 12” 0.5891

7.3.11Expansion Factor Computation for Square Law Flowmeters(Continued)

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Uncompensated Flow Computation:

Pulse, Linear Case inputfrequency•TimeScalingFactor volumeflow= K-Factor•[1-MeterExp.Coeff.•(Tf-Tcal)]

Analog, Linear Case MeasuredInputFlow volumeflow= [1-MeterExp.Coeff.•(Tf-Tcal)] Square Law Case DPFactor 2•deltaP 1/2 volumeflow= •Y• [1-MeterExp.Coeff.•(Tf-Tcal)] density

Square Law , Target Flowmeter Case √densitycal. volumeflow=inputflow• √densityflowing

Pulse, Linearization Case inputfrequency•TimeScalingFactor volumeflow= K-Factor(Hz)•[1-MeterExp.Coeff.•(Tf-Tcal)]

Analog, Linearization Case InputFlow•CorrectionFactor(InputFlow) volumeflow= [1-MeterExp.Coeff.•(Tf-Tcal)]

Square Law, Linearization Case DPFactor(RN) 2•deltaP 1/2 volumeflow= •Y• [1-MeterExp.Coeff.•(Tf-Tcal)] density

Pulse, UVC Case inputfrequency•TimeScalingFactor volumeflow= K-Factor(Hz/cstks)•[1-MeterExp.Coeff.•(Tf-Tcal)]

Shunt Flow Bypass Flowmeter inputfrequency•457•Epa•Ym volumeflow= √flowingdensity•DC•bypasscalibrationfavtor

Gilflo Flowmeter volumeflowatflowingconditions =inputflowatdesignconditions•

NOTE: Therm.Exp.Coefis10-6

[ ]

[ ]

7.3.12Uncompensated Flow Computation

calibrationdensityflowingdensity√

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ILVA Flowmeter-Thismetertyperequiresaninitiallinearizationusingthelineariza-tiontable.Inaddition,thefollowingspecializedcorrectionsarerequired.

ForGas/SteamExpansion(imperial) Y = 1 – (115.814 • (dp / p) • 0.0001) Where: Y=gasexpansioncorrection(NOTE:Y=1forliquid) dp=differentialpressure-incheswatergauge p=upstreampressure-psia

ForReynoldsNumber(volumetriccalculationsforGas/Steam) Cre = (1 – (n / Qn)-1 to a maximum value of m Where: Cre=Reynoldsnumbercorrection(NOTECre=1forliquid) Qn=nominalwatervolumetricflowrate(column6) m=(seetablebelow) n=(seetablebelow)

Meter Size n mDN50 2.53 1.200DN80 0.64 1.125DN100 0.21 1.100DN150 0.13 1.067DN200 0.07 1.050

ThefinalgasexpansionandReynoldsnumbercorrectionis: Qc = Qn • Y • Cre

ForVolumetricCalculations:(calculatethedensitycorrectedvolumetricflowrate): Qd = Qc • (Dn / Da)0.5 Where: Qd=densitycorrectedvolumetricflowrate Qc=nominalwatervolumetricflowrate(column6)correctedfor ReynoldsNumberandgasexpansioneffects. Da=actualflowingdensityofworkingfluid Dn=nominaldensityofwateratreferenceconditions

OncecorrectedfordensityafurthercorrectionisrequiredtotakeintoaccounttheeffectoftemperatureontheILVAprimaryelement.

TemperatureCompensation

ForVolumetricCalculations:UsingthevalueofQdderivedabove,thetemperaturecorrectedflowratecanbecalculated:Qa = ((Ta - Tref) • 0.000189 • Qd) + Qd) Where: Qa=actualvolumetricflowrate Qd=densitycorrectedvolumetricflowrate(fromabove) Tref=referencetemperaturein°C(generally20°C) Ta=actualflowingtemperatureofworkingfluid(in°C)

Itispossibletoconvertfromamassflowratetoavolumetricflowrateandviceversausingthefollowingsimpleformula: Ma = Qn • Da Where: Da=actualflowingdensityofworkingfluid

7.3.13ILVA Flow Meter Equations

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7.4 Computation of the DP Factor

Itisassumedthattheuserhastheprintoutfromastandardizedsizingprogramfortheparticulardevicehewillbeusing.Suchstandardizedprintoutslistallthenecessaryinformationwhichtheuserwillthenbepromptedforbytheinstrumentordiskette.

Itisalsoimportantthattheuserselecttheflowequationtobeusedandeitherselectorenterthefollowingitems: FlowmeterType Thefluidtypeorthefluidpropertiesapplicabletothefluidtobemeasured Beta,MeterExp.Coeff.,InletPipeBore ReferenceConditionsoftemperature,pressure,Zandcalibrationtemperature

Theuserispromptedforthefollowing:

massfloworvolumefloworcorrectedvolumeflowasindicatedbytheflowequation DifferentialPressure InletPressure Temperature Density IsentropicExponent

Theunitthencomputesthefollowingresultscorrespondingtotheuserentryconditionsandappropriatemethods:

Y

FinallytheDPFactoriscomputedasfollows:

Steam Case massflow•[1-MeterExp.Coeff.•(Tf-Tcal)] DPFactor= Y•[2•deltaP•density]1/2

Liquid Case volume•[1-MeterExp.Coeff.•(Tf-Tcal)] DPFactor= 2•deltaP 1/2

density

Gas Case Std.Vol.Flow•refdensity•[1-MeterExp.Coeff.•(Tf-Tcal)] DPFactor= Y•[2•deltaP•density]1/2

Application Hint:TheusermayreenterthisDPFactormultipletimestoassisthiminassemblingthetablepointsofDPFactorandReynold'sNumbernecessarytoconstructa16pointtableforthemeterrun.

NOTE:MeterExp.Coefis(x10-6)

[ ]

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8. RS-232 Serial Port

8.1 RS-232 Port Description:TheST2hasageneralpurposeRS-232Portwhichmaybeusedforanyoneofthefollowingpurposes:

TransactionPrinting,DataLogging,RemoteMeteringbyModem(optional),ComputerCommunicationLink,ConfigurationbyComputer,PrintSystemSetup,PrintCalibration/MalfunctionHistory

8.2 Instrument Setup by PC’s over Serial PortADisketteprogramisprovidedwiththeST2thatenablestheusertorapidlyconfiguretheST2usingaPersonalComputer.Includedonthediskettearecommoninstrumentapplicationswhichmaybeusedasastartingpointforyourapplication.Thispermitstheusertohaveanexcellentstartingpointandhelpsspeedtheuserthroughtheinstrumentsetup.

8.3 Operation of Serial Communication Port with Printers ST2’sRS-232channelsupportsanumberofoperatingmodes.Oneofthesemodesisintendedtosupportoperationwithaprinterinmeteringapplicationsrequiringtransactionprinting,dataloggingand/orprintingofcalibrationandmaintenancereports.Fortransactionprinting,theuserdefinestheitemstobeincludedintheprinteddocument.Theusercanalsoselectwhatinitiatesthetransactionprintgeneratedaspartofthesetupoftheinstrument.Thetransactiondocumentmaybeinitiatedviaafrontpanelkeydepression.Indatalogging,theuserdefinestheitemstobeincludedineachdatalogasaprintlist.Theusercanalsoselectwhenorhowoftenhewishesadatalogtobemade.Thisisdoneduringthesetupoftheinstrumentaseitheratimeofdayorasatimeintervalbetweenlogging.Thesystemsetupandmaintenancereportlistalltheinstrumentsetupparametersandusageforthecurrentinstrumentconfiguration.Inaddition,theAudittrailinformationispresentedaswellasastatusreportlistinganyobservedmalfunctionswhichhavenotbeencorrected.Theuserinitiatestheprintingofthisreportatadesignatedpointinthemenubypressingtheprintkeyonthefrontpanel.

8.4 ST2 RS-232 Port Pinout 1HandshakeLine(cdin)2Transmit(tx)3Receive(rx)4DoNotUse5Ground6DoNotUse7RTSout8DoNotUse9DCPowerOut*

*8VDCPowersuppliedonPin9topowermodem

123456789

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9. RS-485 Serial Port (optional)

9.1 RS-485 Port Description:TheST2hasaanoptionalgeneralpurposeRS-485Portwhichmaybeusedforanyoneofthefollowingpurposes: AccessingProcessParameters Rate,Temperatures,Pressures,Density,Time&Date,Setpoints,etc. AccessingSystemAlarms System,Process,SelfTest,ServiceTestErrors AccessingTotalizers Heat,Mass,CorrectedVolume,VolumeTotalizersandGrandTotalizers ExecutingVariousActionRoutines ResetAlarms,ResetTotalizers,PrintTransaction,ResetErrorHistory,

9.2 GeneralThe optional RS-485 card utilizes Modbus RTU protocol to access a variety of processparametersandtotalizers.Inaddition,actionroutinescanbeexecuted.Forfurtherinformation,contactfactoryandrequestRS-485Protocolmanual.

9.3 Operation of Serial Communication Port with PCTheflowcomputer'sRS-485channelsupportsanumberofModbusRTUcommands.Refertoportpinout(below)forwiringdetails.ModbusRTUdriversareavailablefromthirdpartysourcesforavarietyofManMachineInterfacesoftwareforIBMcompatiblePC's.Theuserreadsandwritesinformationfrom/totheRS-485usingtheModbusRTUcommands.TheST2thenrespondstotheseinformationandcommandrequests.Processvariablesandtotalizersarereadinregisterpairsinfloatingpointformat.Timeanddatearereadasaseriesofintegerregistervalues.Alarmsareindividuallyreadascoils.Actionroutinesareinitiatedbywritingtocoils.

9.4 ST2 RS-485 Port Pinout

123456789

1 Ground2Ground3Ground4TX/RX(+)5TX/RX(-)6DoNotUse7TerminatingResistor(180Ω)8TX/RX(+)9TX/RX(-)

NOTES:4isinternallyconnectedto85isinternallyconnectedto9

Toterminateendofcable,connectpin7toeither4or8.

RequestST2 RS-485 Option with Modbus RTU ProtocolmanualforcompletedetailsofRS-485

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10. Flow Computer Setup SoftwareTheST2setupprogramprovidesforconfiguring,monitoringandcontrollingaST2unit.Sampleapplicationsarestoredindiskfiles.ThesetupprogramcallstheseTemplates.Youcanstorethesetupfromtheprogram’smemorytoeithertheST2(Downloadingthefile)ortoadiskfile(Savingthefile)forlaterusage.Similarlyyoucanloadthesetupinprogrammemoryfromeitheradiskfile(Opening afile)orfromtheST2unit(Uploadingafile).Theprogramcanmonitoroutputsfromtheunitwhileitisrunning.Theprogramcanresetalarmsandtotalizers.Thepeakdemandmayberesetwhentheoptionissupplied.Forassistancetherearemini-helpsatthebottomofeachscreenintheprogram.ThereisalsocontextsensitivehelpavailableforeachscreenaccessiblebypressingtheF1key.

10.1 System Requirements:IBMPCorcompatiblewith386orhigherclassmicroprocessor4MBRAM3MBfreediskspaceVGAorhighercolormonitorat640x480Microsoft®Windows™3.1or3.11orWindows95/98™orhigherCommunicationPort-RS-232RS-232Cable(customersupplied)

10.2 Cable and Wiring Requirements:TheserialcommunicationportonyourPCiseithera25pinor9pinconnector.Nocablingissuppliedwiththesetupsoftware.Acablemustbepurchasedseparatelyormadebytheuser.ItisrecommendedtopurchaseaserialcablewhichmatchestheavailablecommunicationportonyouPCanda9pinmaleconnectionfortheST2serialport.

10.3 Installation for Windows™ 3.1 or 3.11TheSetupSoftwareincludesaninstallationprogramwhichcopiesthesoftwaretoyourharddrive.InsertSetupDisk1inafloppydrive.IntheProgramManager,clickFile,andthenselectRun.

NOTE: ForWindows95™ClicktheStartbutton,selectRunandproceedasfollows:

Typethefloppydriveletterfollowedbyacolon(:)andabackslash(\),andthewordsetup.ForExample: a:\setupFollowtheinstructionsonyourscreen.

10.4 Using the Flow Computer Setup SoftwareThesetupsoftwarewindowconsistsofseveralmenu“Tabs”.Eachtabisorganizedintogroupscontainingvariousconfigurationand/ormonitoringfunctions.Toviewthetabwindows,simplyclickonthetab.Theprevioustabwindowwillbehiddenasthenewtabwindowisbroughttotheforeground.

Caution: ItisrequiredthattheST2unitwhichisbeingconfiguredbekeptintheoperatingmodewhileusingthesetupdiskette.Ifnot,uncertaintyexistsastowhatinformationwillberetainedwhenthesessionisconcluded.

ST2 Flow Computer

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10.5 File TabThe File Tabhasthreesections.AnyoftheoptionsonthistabcanalsobeaccessedfromtheFilesubmenu.TheTemplate Sectionprovidesforopeningandsavingtemplates.TheSaveandSave As buttonsprovidethestandardWindowsfunctionalityfordealingwithfiles.TheOpenbuttonisusedtoopenexistingtemplates.

TheOpen optionallowsforcreatingcustomtemplatesusingtheexistingtemplateinmemoryasthestartingpoint.Assignanewnameforthistemplate.Thetemplatewillbesavedunderthisnewname. Atypicalscenariousingthesetupprogramwouldbethefollowing: •Openupapredefinedtemplatefromthesuppliedlist •Choose‘SaveAs’tosavethistoanewfilename •Proceedtocustomizethetemplatebymakinganychangesthatareneeded •Savethetemplatetodisk(ifyouwanttoreusethistemplate) •Downloadthetemplatetoanattachedunit.TheCommunications with ST2 Sectionallowstheusertouploadthesetupfromtheunitordownloadtheprogram’scurrenttemplatetotheunit.ThePrint (report) Section allowstheuserto:

1.ConfigurethecurrentWindowsprinterthroughtheSelectPrinteroption.2.PrintaMaintenanceReportthroughthePC'sprinterusingthePrintMaintenanceoption.

3.PrintthecurrentsetupthroughthePC'sprinterusingPrintSetupoption.

10.6 Setup TabTheSetuptabiswherethemajorityoftheST2instrumentsetupmodificationsaredone.TheSetuptabisdividedintofivesections. System Section: Parameters,Display,Units Input Section: Flow,Fluid,CompensationInputs Output Section: Pulse,Currents Relay Section: Relays

Other Settings Section: Administration,Communication,PrintingNOTE: Manysetupitemsareenabledordisableddependingonprevioussetup

selections,Itisimportanttoworkyourwaythroughtheabovelistintheordershown.Besuretoverifyyourselectionswhenyouarethroughprogrammingtoinsurethatnosettingswerechangedautomatically.

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10.7 View TabTheViewTabscreenallowsforviewingselectedgroupitemsonthePCinasimilarformattothatshownontheunitdisplay.DatafromthefollowinggroupscanbeviewedintheListofValuessection: ProcessParameters(i.e.rate,temperature) Totalizers(i.e.total,grandtotal) InputSignals AnalogOutput ErrorStatus ST2SoftwareVersionInformationThesetupsoftwareassumesthecurrentsetuphasbeenuploadedfromtheflowcomputerintothePC.ItisimportantthatthesetupprogramandtheST2unitareusingthesamesetupinformationatalltimesorthedatawillbeinconsistent.Itisbesttouploadordownloadthesetupbeforeusingthisfeaturetosynchronizethesetups.

ErrorLogDatafromtheerrorloggerisviewedinaseparateErrorLogsectiononthescreen.Tostarttheviewer,firstchecktheboxesofitemstoviewandthenclickthestartbutton.Thedatawillappearintheappropriatesectionsandwillbecontinuouslyupdated.Therefreshrateisdependentonthenumberofitemsthatarebeingviewedandthebaudrateoftheconnection.DataintheListofValuessectioncanbecollapsedbyclickingonthe‘minus’signinfrontofthegrouptitle.Thedatacanbeexpandedbyclickingonthe‘plus’signinfrontofthegrouptitle.Ifagroupiscollapsedanddatainthegroupchangesonrefresh,thegroupwillautomaticallyexpand.DataintheErrorLogsectiondoesnotexpandorcollapse.Changingtheviewitemsrequiresstoppingthecurrentviewing,checkingthenewselectionsandthenrestartingtheviewer.IfcommunicationerrorsoccurwhilereadingdatafromtheST2device,theword‘Error’willappearinplaceoftheactualvalue.IftheconnectiontotheST2islost,theviewerwilltimeoutwithamessagesayingthedeviceisnotresponding.TheviewerwillattempttocommunicatewiththeST2devicematchingthedeviceIDsetinthecommunicationsscreen.Ifyouarehavingtroubleestablishingcommunication,comparesettingsforthePCandtheflowcomputer.AlsoverifytheconnectionsbetweenthePCandflowcomputer.

10.8 Misc. TabThistabhasthreesections:Tools,ActionsandOptions.Thetoolssectioncontainsvarioussystemadministrationactivitiessuchascreating/modifyingtheinitialsign-onscreenorcreateprintheaders.

TheActionssectionisusedtosendcommandstotheST2unit.ResetTotalizers,ResetAlarms,Simulations,SelfCheck,ResetPeakDemand(ifequipped)

TheOptionssectionhasthefollowingselections:LanguageTranslations,NetworkCardConfigurationAdditionalcapabilitiesmaybeprovidedinthefuture.

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11. Glossary of Terms

Access Code Anumericpasswordwhichisenteredbyauserattemptingtogainentrytochangesetupparameters.

AGA-3 Aempiricalflowequationapplicabletoorificeandseveralothersquarelawflowmeters.

AGA-5 Agasflowequationforcomputingthecombustionheatflowfrommeasuredvolumeflow,temperatureandpressureaswellas

storedgasproperties.

AGA-7 Agasflowequationforpulseproducing,volumetricflowmeterswhichcomputestheequivalentflowatreferenceconditions

fromthemeasurementsmadeatflowinglineconditions.

Assign Usage Amenuselectionduringthesetupoftheinstrumentwhichselectstheintendedusagefortheinput/output.

Barometric Pressure Anentryoftheaverage,localatmosphericpressureatthealtitudeorelevationoftheinstallation.(typically14.696psia)

Beta Aimportantgeometricratioforasquarelawflowmeters.

Calibration Anordersequenceofadjustmentswhichmustbeperformedinorderfortheequipmenttooperateproperly. Calibration Temperature Thetemperatureatwhichaflowsensorwascalibratedonatestfluid. Combustion Heat Theenergyreleasedbyafluidfuelduringcombustion.

Default Avaluetobeassumedformanualinputsorintheeventofafailureinainputsensor.

Display Damping Anaveragingfilterconstantusedtosmoothoutdisplaybounce.

DP Factor Ascalingconstantforasquarelawflowmeter.

Error Log Ahistoricalrecordwhichcaptureserrorswhichhaveoccurred.

Flow Equation Arecognizedrelationshipbetweentheprocessparametersforflow,temperature,pressureanddensityusedinflow

measurements.

Galvanic Isolation Inputandoroutputfunctionswhichdonotshareaconductivegroundorcommonconnectionbetweenthem.

Gas Cor. Vol Eq. AnequationwherethecorrectedvolumeflowofgasatSTPiscomputerfrommeasuredvolumeflow,temperatureand

pressureaswellasstoredgasproperties.

Gas Comb. Heat Eq. Anequationwherethecombustionheatflowofgasiscomputerfrommeasuredvolumeflow,temperatureandpressureas

wellasstoredgasproperties.

Gas Mass Eq. Anequationwherethemassflowofgasiscomputerfrommeasuredvolumeflow,temperatureandpressureaswellasstored

gasproperties.

Flowing Z-Factor ThemeanZ-Factorunderflowingconditionsoftemperatureandpressureforaspecificgas.

ST2 Flow Computer

107

Full Scale Thevalueoftheprocessvariableatthefullscaleormaximuminputsignal.

Inlet Pipe Bore Theinternalpipediameterupstreamoftheflowmeasurementelement.

Isentropic Exponent Apropertyofagasorvaporutilizedinorificemetercalculations.

K-Factor Thecalibrationconstantforapulseproducingflowmeterexpressedinpulsesperunitvolume

Linear Aflowmeasurementdevicewheretheoutputsignalisproportionaltoflow.

Linear 16 Pt. AmathematicalapproximationtoanonlineardevicewherebyacorrectionfactororK-Factortableasafunctionofinputsignal

is utilizedtoeliminateflowmeternonlinearity. Low Flow Cutoff Thevalueofinputsignalbelowwhichflowratemaybeassumedtobe0andatwhichtotalizationwillcease.

Low Scale Thevalueoftheprocessvariableatthezeroinputsignal.

Manual Anentryvaluetobeusedasafixedconditioninaequation

Meter Exp. Coef. Acoefficientinanequationwhichmaybeusedtocorrectforchangesinflowmeterhousingdimensionedchangeswith

temperature.

Mole % The%compositionofanindividualgasinagasmixture.

NX-19 Aseriesofequationsusedtocomputethecompressibilityofnaturalgasasafunctionofspecificgravity,temperature,

pressureandgascomposition.

Protocol Anagreeduponmethodofinformationexchange.

Print Initiate Auserspecifiedconditionwhichmustbesatisfiedforatransactiondocumenttobeprinted.

Pulse Type Amenuselectableequivalentpulseoutputstage. Pulse Value Anoutputscalingfactordefiningtheequivalentamountofflowtotalrepresentedby1outputpulse.

Ref. Z-Factor TheZ-Factorforagasatreferenceconditionsoftemperatureandpressure.

Ref. Density Thedensityofafluidatreferenceconditionsoftemperatureandpressure.

Relay Function Theassignedusageforarelayoutput.

Relay Mode Theuser’sdesiredoperatingmodefortherelay.Examples:follow,latch,timedpulse,abovesetpoint,belowsetpoint

Safe State Thestateofaninstrument'soutputswhichwilloccurduringapowerdownstate.Thestatetheinstrumentassumeswhenthe

computationsarepaused.

11. Glossary of Terms (Continued)

ST2 Flow Computer

108

Scroll List Theuser’sdesireddisplaylistwhichcanbepresentedonthetwolistdisplayonLine1and/orL2whentheSCROLLkeyis

depressed.

Self Check Adiagnosticsequenceofstepsaunitperformstoverifyit’soperationalreadinesstoperformit’sintendedfunction.

Service Test Adiagnosticsequencerequiringspecializedtestapparatustofunctiontoverifysystemreadiness.

Setpoint Analarmtrippoint.

Simulation Aspecialoperatingmodeforanoutputfeaturewhichenablesaservicepersonneltomanuallyexercisetheoutputduring

installationortroubleshootingoperations.

Square Law Flowmeters Typesofmeasurementdeviceswhichmeasuredifferentialpressureacrossaknowngeometrytomakeaflowmeasurement.

SQR LAW (Square Law w/o SQRT) Asquarelawflowmeasurementdeviceequippedwithapressuretransmitterwithoutaintegralsquarerootextractor.

SQR LAW-LIN (Square Law w/ SQRT) Asquarelawflowmeasurementdeviceequippedwithapressuretransmitterwithintegralsquarerootextraction.

SQR Law 16PT (Square Law 16pt) AmathematicalapproximationtoasquarelawdevicewherethedischargecoefficientisrepresentedasatableofDPFactor

vsReynold'sNumber.

Steam Delta Heat Acomputationofthenetheatofsaturatedsteamequaltothetotalheatofsteamminustheheatofwateratthemeasured

actualtemperature.

Steam Heat Acomputationofthetotalheatofsteam.

Steam Net Heat Acomputationofthenetheatofsteamequaltothetotalheatofsteamminustheheatofwateratthesamesaturated

temperature.

STP Reference Theuser’sdesiredpressureand/ortemperaturetobeconsideredasthereferenceconditioninthecomputationoffluid

propertiesorcorrectedvolumeconditions.

TAG Analphanumericdesignationforaparticularinstrument.

Time Constant Anaveragingfilterconstantusedtoreducebounceontheanalogoutput.Thehighthenumbertheslowertheresponse,the

greaterfiltering.

UVC UniversalViscosityCurveisarepresentationofthecalibrationfactorforaturbineflowmeter.ItisexpressedasatableofK-

FactorasafunctionofHz/CSTKS.

Viscosity Coef Aparameterinanequationwhichisusedtoestimatetheviscosityasafunctionoftemperature.

11. Glossary of Terms (Continued)

ST2 Flow Computer

109

12.2 Diagnosis Flow Chart and TroubleshootingAllinstrumentsundergovariousstagesofqualitycontrolduringproduction.Thelastofthesestagesisacompletecalibrationcarriedoutonstate-of-the-artcalibrationrigs.Asummaryofpossiblecausesisgivenbelowtohelpyouidentifyfaults.

Is there a power supply voltage across Terminals 23 and 24? No

Yes

Check the connections according to the circuit diagrams.

Check junction box fuses.

Is the Display BacklightVisible?

No

Yes

Check/Replace internal fuse. If fuse is OK, Factory Service Required.

Is there a black bar across the display?

Yes

No

Factory Service Required.

Does the display alternate between blank and sign on message? Yes

No

Does the display show an error message?

Yes

No

See section 12.3 for cause and remedy.

No system or process errors present.

Are the Display Characters Visible?

No

Yes



12. Diagnosis and Troubleshooting12.1 Response of ST2 on Error or Alarm:

Errorindicationswhichoccurduringoperationareindicatedalternatelywiththemeasuredvalues.TheST2FlowComputerhasfourtypesoferror:

TYPE OF ERROR DESCRIPTION

SystemAlarms Errorsdetectedduetosystemfailure

Sensor/ProcessAlarms Errorsdetectedduetosensorfailureorprocessalarmconditions

ServiceTestErrors Errors detected due to problems foundduring service test. (Service test can onlybe performed by qualified Factory servicetechniciansbecauseservicecodeandspecialequipmentareneeded)

SelfTestErrors Errorsdetectedduringselftest.(Eachtimetheunitispowered,itrunsaselftest)

ST2 Flow Computer

110

12.3 Error Messages:

Cause

Powerhasbeeninterrupted

Possibletransient

PossibleImproperwiringorusageMessageTransmissionfailure.

OperatorError

Printbufferfull,Datamaybelost

Temperatureorpressureinputhasgonebelowthesaturatedsteamrangeoftheinternalsteamtables Temperatureorpressureinputhasgonebeloworexceededtherangeoftheinternalsteamtables

Flowinputhasexceededinputrange(ifstacked,maybeloorhitransmitter)

Input1signalfromsensorhasexceededinputrange

Input2signalfromsensorhasexceededinputrange

Input3signalfromsensorhasexceededinputrange Opencircuitdetectedonflowinput(ifstacked,maybeloorhitransmitter)

Opencircuitdetectedoninput1



OpencircuitdetectedonRTD1input ShortcircuitdetectedonRTD1input

Remedy

AcknowledgeErrorRemedynotrequired

AcknowledgeErrorRemedynotrequired

Checkwiringandcommunicationsettings/protocol

RepeatCalibration

Checkpaperandprinterconnections

Checkapplication,Insurethatallsensorsareworkingproperly

Checkapplication,Insurethatallsensorsareworkingproperly

Checksensorcalibration




Checkwiringandsensor




CheckwiringandRTD

CheckwiringandRTD

Error Message

POWER FAILURE

WATCHDOG TIMEOUT

COMMUNICATION ERROR

CALIBRATION ERROR

PRINT BUFFER FULL

WET STEAM ALARM

OFF FLUID TABLE

FLOW IN OVERRANGE

INPUT 1 OVERRANGE

INPUT 2 OVERRANGE

INPUT 3 OVERRANGE

FLOW LOOP BROKEN

LOOP 1 BROKEN

LOOP 2 BROKEN

LOOP 3 BROKEN

RTD 1 OPEN

RTD 1 SHORT

NOTE: The24VDCoutputhasaselfresettingfuse.

ST2 Flow Computer

111

Cause

OpencircuitdetectedonRTD2input ShortcircuitdetectedonRTD2input

Pulseoutputhasexceededtheinternalbuffer

Currentoutput1isbeloworabovespecifiedrange

Currentoutput1isbeloworabovespecifiedrange

Relay1isactiveduetohighalarmcondition

Relay1isactiveduetolowalarmcondition





24Voutputerrordetectedduringservicetestrun

Pulseinputerrordetectedduringservicetestrun

Errordetectedoninput1voltageinputduringservicetestrun

Errordetectedoninput1currentinputduringservicetestrun

Errordetectedoninput2duringservicetestrun

Errordetectedoninput3duringservicetestrun

Remedy

CheckwiringandRTD

CheckwiringandRTD

Adjustpulsevalueorpulsewidth

Adjustthe"0"/"FullScale"valuesorincrease/lowerflowrate

Adjustthe"0"/"FullScale"valuesorincrease/lowerflowrate

Notrequired

Notrequired

Notrequired

Notrequired

Notrequired

Notrequired

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

Error Message

RTD 2 OPEN

RTD 2 SHORT

PULSE OUT OVERRUN

Iout 1 OUT OF RANGE

Iout 2 OUT OF RANGE

TOTALIZER ERROR

RELAY 1 HI ALARM

RELAY 1 LO ALARM

RELAY 2 HI ALARM

RELAY 2 LO ALARM

RELAY 3 HI ALARM

RELAY 3 LO ALARM

24VDC OUT ERROR

PULSE IN ERROR

INPUT 1 Vin ERROR

INPUT 1 Iin ERROR

INPUT 2 Iin/RTD ERROR

INPUT 3 Iin/RTD ERROR

12.3 Error Messages: (Continued)

ST2 Flow Computer

112

Cause

Pulseoutputerrordetectedduringservicetestrun

Currentoutput1errordetectedduringservicetestrun

Currentoutput2errordetectedduringservicetestrun

Relay 1 error detected duringservicetestrun

Relay 2 error detected duringservicetestrun

RS-232 error detected duringservicetestrun

Errordetected inA/Dconverterduringselftest

Erroronaccesstotheprogrammemory

AllorpartoftheEEPROMdataforsetupisdamagedorhasbeenoverwritten

Therealtimeclockdatawaslostduringextendedpoweroutage

Adisplaymalfunctionhasbeendetected.

PartoralloftheinternalRAMisdamaged

Steamtrapmalfunction

Steamtrapmalfunction

Contentsofdatalogwerecorruptandlost

Remedy

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

ByFactoryService

Re-Entersetupdata,Ifproblempersists,Fac-toryservicerequired

Re-Entertimeanddate

ByFactoryService

ByFactoryService

Servicesteamtrap

Changeerrordelay

Cleardatalog,Clearerrors

Error Message

PULSE OUT ERROR

Iout 1 ERROR

Iout 2 ERROR

RELAY 1 ERROR

RELAY 2 ERROR

RS-232 ERROR

A/D MALFUNCTION

PROGRAM ERROR

SETUP DATA LOST

TIME CLOCK LOST

DISPLAY MALFUNCTION

RAM MALFUNCTION

TRAP ERROR

TRAP BLOWING

DATALOG LOST

ST2 Flow Computer

113

Appendix A - Fluid Properties Table

Fluid Properties Table

LIQUID FLUID REF. REF. COEFF. OF COMBUSTION SPECIFIC LIQ.VISC. VISCOSITY BY DENSITY TEMP. (ºF) EXPANSION HEAT (Btu/lb) HEAT ANDREDE’s ANDREDE’s (lb./ft3) LIQUID H20 (Btu/lb °F) EQUATION EQUATION and CO2 COEFF. “A” COEFF. “B”

AIR 54.56 -317.8 0.0016262 0 0.45 0.172 0 AMMONIA 42.63 -28.2 0.0005704 0 1.05 0.00157 2228.25 ARGON 86.89 -302.6 0.0014861 0 0.45 0.011291 511.34 CO2 65.333 -10.0 0.0012609 0 0.45 0.000001 5305.44 METHANE 26.48 -258.7 0.0010523 23920 0.80 0.006819 526.08 NATURALGAS 26.48 -258.7 0.0010523 23920 0.80 0.006819 526.08 NITROGEN 50.44 -320.4 0.0014917 0 0.55 0.006524 434.94 OXYGEN 71.21 -297.4 0.0013458 0 0.41 0.019773 340.29 PROPANE 31.671 60 0.0007178 21690 0.6 0.009969 1267.35 Nx-19 26.48 -258.7 0.0010523 23920 0.80 0.006819 526.08 GASOLINE 46.8 60 0.0003703 20400 0.5 0.045617 1432.26 KEROSENE 51.79 60 0.0002681 18400 0.45 0.004378 3245.78 No.2FUEL 58.97 60 0.0000885 17970 0.42 0.000453 4946.15 WATER 62.37 60 0.0001015 0 1 0.001969 3315.61 HYDROGEN 4.41874 -432.2 0.0007259 60620.5 2.336 0.003537 48.5432 ETHYLENE 34.085 -127.5 0.00068257 22292 1 0.000238 26665.90HELIUM 9.14157 -452.1 0.00011477 0 1 0.0033 0

GAS FLUID REF. REF. REF. Z Z FACTOR AT SPECIFIC COMBUSTION ISENTROPIC VISCOSITY BY VISCOSITY BY DENSITY TEMP. (ºF) FACTOR 100 PSIA HEAT HEAT (Btu/lb) EXPONENT ANDREDE’s ANDREDE’s (lb./ft3) (14.696 PSIA) and 60°F (Btu/lb °F) LIQUID H2O EQUATION EQUATION and CO2 COEFF.“A” COEFF.“B”

AIR 0.076 60 1 0.997 0.24 0 1.4 0.000138 0.775522AMMONIA 0.045 60 1 0.955 0.52 0 1.31 0.000013 1.05951ARGON 0.105 60 1 0.995 0.125 0 1.67 0.00021 0.750757CO2 0.116 60 1 0.954 0.21 0 1.32 0.000049 0.91136METHANE 0.042 60 1 0.970 0.55 23920 1.31 0.000018 1.015892NAT.GAS 0.0456 60 1 0.970 0.55 23920 1.31 0.000018 1.015892NITROGEN 0.074 60 1 0.998 0.25 0 1.41 0.000202 0.7128734OXYGEN 0.084 60 1 0.995 0.22 0 1.41 0.000169 0.761811PROPANE 0.116 60 1 0.870 0.4 21690 1.14 0.00002 0.952092Nx-19 0.0456 60 1 0.97 0.55 23920 1.31 0.000018 1.015892 HYDROGEN 0.00532 60 1 1.0042 3.42 60620.5 1.405 0.000151 0.647667 ETHYLENE 0.074717 60 1 0.994 0.386 22292 1.244 0.0093 0HELIUM 0.01055 60 1 1 1.25 0 1.630 0.000209 0.721975

ST2 Flow Computer

114

Appendix B - Setup Menus

TIMEBA

SEHEA

TFLOW

UNIT

HEA

TTO

TAL

UNIT

MAS

SFLOW

UNIT

MAS

STO

TAL

UNIT

COR.VOL.

FLOWUNIT

COR.V

OL.

TOTA

LUNIT

VOLU

ME

FLOWUNIT

VOLU

ME

TOTA

LUNIT

DEF

INITION

bbl

TEMPE

RA-

TUREUNIT

PRES

SURE

UNIT

DEN

SITY

UNIT

SPEC

.EN

THAL

PY

UNIT

LENGTH

UNIT

FLUIDTYP

EREF.D

ENSITY

THER

M.E

XP.

COEF.

COMBU

STION

HEA

TSP

ECIFIC

HEA

TFLOWZ-FAC

-TO

RREF.Z-FAC

-TO

RISEN

TROPIC

EXP.

MOLE

%

NITROGEN

MOLE

%CO2

VISC

OSITY

COEF.A

VISC

OSITY

COEF.B

EZSET

UP

ACCES

SCODE

FLOWEQUA-

TION

ENTE

RDAT

EEN

TERTIME

TAG#

ORDER

CODE

SERIAL#

SENSO

RSE-

RIAL#

SCROLLLIST

DISPL

AY

DAM

PING

MAX

.DEC

.PO

INT

LANGUAG

E

FLOWMET

ER

TYPE

INPU

TSIGNAL

FULLSCAL

ELO

WSCAL

EHIGHRAN

GE

FULLSCAL

EHIGHRAN

GE

LOWFLO

W

CUTO

FFCAL

IBRAT

ION

DEN

SITY

K-FA

CTO

RPIPE

INNER

DIAMET

EREN

TERBET

A

MET

EREXP

.COEF

DP-FA

CTO

RLO

WPAS

SFILTER

LINEA

RIZAT

ION

FLOWMET

ER

LOCAT

ION

1

SELE

CTINPU

T

2

LOWSCAL

EVA

LUE

FULLSCAL

EVA

LUE

DEF

AULT

VALU

EST

PREF

ER-

ENCE

CAL

IBRAT

ION

TEMP

LOWDELTAT

CUTO

FFVIEW

INPU

TSIGNAL

INPU

TSIGNAL

LOWSCAL

EVA

LUE

FULLSCAL

EVA

LUE

DEF

AULT

VALU

EST

PREF

ER-

ENCE

BAROMET

RIC

PRES

SVIEW

INPU

TSIGNAL

INPU

TSIGNAL

ASSIGNPULS

EOUTP

UT

PULS

ETY

PEPU

LSEVA

LUE

PULS

EWIDTH

SIMULATION

FREQ

.

1

SELE

CT

OUTP

UT

2

LOWSCAL

EVA

LUE

TIMECON

-ST

ANT

CURREN

TOUT

VALU

E(DISPL

AY)

SIMULATION

CURREN

TAS

SIGNCUR

-REN

TOUT.

CURREN

TRAN

GE

LOWSCAL

EVA

LUE

FULLSCAL

EVA

LUE

TIMECON

-ST

ANT

CURREN

TOUT

VALU

E(DISPL

AY)

SIMULATION

CURREN

TAS

SIGNCUR

-REN

TOUT.

CURREN

TRAN

GE

SELE

CT

REL

AY1,2,3

LIMITSET

-PO

INT

PULS

EVA

LUE

HYS

TERES

ISREL

AYFUNC

-TION

REL

AYMODE

FULLSCAL

EVA

LUE

EXAM

INE

AUDITTRAIL

ERRORLOG

SOFT

WAR

EVE

RSION

(DISPL

AY)

HAR

DWAR

EVE

RSION

(DISPL

AY)

PRINTSY

STEM

SE

TUP

SELFCHEC

K

SYST

EM

PAR

AM

ETER

SERV

ICE

&

AN

ALY

SIS

CO

MM

UN

UIC

ATIO

N

REL

AYS

CU

RR

ENT

OU

TPU

T

PULS

E O

UTP

UT

CO

MPE

NSA

TIO

NIN

PUT

FLO

W IN

PUT

FLU

ID D

ATA

SYST

EM U

NIT

S

DIS

PLAY

SQUAR

ELA

W

FLOWMET

ER

BYPA

SSCAL

.FA

CTO

RL

BYPA

SSEAM

FA

CTO

R

LOWSCAL

E

RES

ETALA

RM

PULS

EWIDTH

REL

AYSIMULA

-TION

SETU

P M

ENU

SOperatorC

odeAccess

Thesefunctionswillonlyappearw

ithap-

propriatesettingsinotherfunctions.

PROTO

COL

DEV

ICEID

BAUDRAT

EPA

RITY

NET

WO

RK

CA

RD

SWITCHUP

SWITCHDOWN

VIEW

INPU

TSIGNAL

VIEW

HIR

ANGE

SIGNAL

BYPA

SSDC

FACTO

RBY

PASS

YM

FACTO

R

OPE

RAT

OR

CODE

DAY

LIGHT

SAVINGS

TRAP

ERROR

DEL

AYTR

APBLO

W-

INGDEL

AY

RS2

32USA

GE

DEV

ICEID

BAUDRAT

EPA

RITY

HAN

DSH

AKE

PRINTLIST

PRINTINITIATE

PRINT

INTE

RVAL

PRINTTIME

DATAL

OG

ONLY

DATAL

OG

FORMAT

MODEM

CONTR

OL

DEV

ICE

MAS

TER

SENDIN

C

TOTONLY

INCONLY

SCAL

ERCLE

AR

DATAL

OG

CAL

LON

ERROR

NUMBE

ROF

RED

IALS

HAN

GUPIF

INAC

TIVE

ERRORMAS

KMODEM

AUTO

AN

SWER

CAL

LOUTNO

CAL

LOUT

TIME

STAR

T HE

RE

ILVA

SIZE

ACCEL

ABAR

SIZE

ST2 Flow Computer

115

Appendix B- Setup Menus (continued)

FLOWMET

ER

TYPE

INPU

TSIGNAL

FULLSCAL

ELO

WSCAL

EHIGHRAN

GE

FULLSCAL

EHIGHRAN

GE

LOWFLO

W

CUTO

FFCAL

IBRAT

ION

DEN

SITY

K-FA

CTO

RPIPE

INNER

DIAMET

EREN

TERBET

A

MET

EREXP

.COEF

FLO

W IN

PUT

SQUAR

ELA

W

FLOWMET

ERLO

WSCAL

ESW

ITCHUP

SWITCHDOWN

TIMEBA

SEHEA

TFLOW

UNIT

HEA

TTO

TAL

UNIT

MAS

SFLOW

UNIT

MAS

STO

TAL

UNIT

COR.VOL.

FLOWUNIT

COR.V

OL.

TOTA

LUNIT

VOLU

ME

FLOWUNIT

VOLU

ME

TOTA

LUNIT

DEF

INITION

bbl

TEMPE

RA-

TUREUNIT

PRES

SURE

UNIT

DEN

SITY

UNIT

SPEC

.EN

THAL

PY

UNIT

LENGTH

UNIT

FLUIDTYP

EREF.D

ENSITY

THER

M.E

XP.

COEF.

COMBU

STION

HEA

TSP

ECIFIC

HEA

TFLOWZ-FAC

-TO

RREF.Z-FAC

-TO

RISEN

TROPIC

EXP.

MOLE

%

NITROGEN

MOLE

%CO2

VISC

OSITY

COEF.A

VISC

OSITY

COEF.B

EZSET

UP

ACCES

SCODE

FLOWEQUA-

TION

ENTE

RDAT

EEN

TERTIME

OPE

RAT

OR

CODE

TAG#

ORDER

CODE

SERIAL#

SENSO

RSE-

RIAL#

SCROLLLIST

DISPL

AY

DAM

PING

MAX

.DEC

.PO

INT

LANGUAG

E

1

SELE

CTINPU

T

2

LOWSCAL

EVA

LUE

FULLSCAL

EVA

LUE

DEF

AULT

VALU

EST

PREF

ER-

ENCE

CAL

IBRAT

ION

TEMP

LOWDELTAT

CUTO

FFVIEW

INPU

TSIGNAL

INPU

TSIGNAL

LOWSCAL

EVA

LUE

FULLSCAL

EVA

LUE

DEF

AULT

VALU

EST

PREF

ER-

ENCE

BAROMET

RIC

PRES

SVIEW

INPU

TSIGNAL

INPU

TSIGNAL

ASSIGNPULS

EOUTP

UT

PULS

ETY

PEPU

LSEVA

LUE

PULS

EWIDTH

SIMULATION

FREQ

.

1

SELE

CT

OUTP

UT

2

LOWSCAL

EVA

LUE

TIMECON

-ST

ANT

CURREN

TOUT

VALU

E(DISPL

AY)

SIMULATION

CURREN

TAS

SIGNCUR

-REN

TOUT.

CURREN

TRAN

GE

LOWSCAL

EVA

LUE

FULLSCAL

EVA

LUE

TIMECON

-ST

ANT

CURREN

TOUT

VALU

E(DISPL

AY)

SIMULATION

CURREN

TAS

SIGNCUR

-REN

TOUT.

CURREN

TRAN

GE

RS2

32USA

GE

DEV

ICEID

BAUDRAT

EPA

RITY

HAN

DSH

AKE

PRINTLIST

FULLSCAL

EVA

LUE

EXAM

INE

AUDITTRAIL

ERRORLOG

SOFT

WAR

EVE

RSION

(DISPL

AY)

HAR

DWAR

EVE

RSION

(DISPL

AY)

PRINTSY

STEM

SE

TUP

SELFCHEC

K

SYST

EM

PAR

AM

ETER

SERV

ICE

&

AN

ALY

SIS

CO

MM

UN

UIC

ATIO

N

CU

RR

ENT

OU

TPU

T

PULS

E O

UTP

UT

CO

MPE

NSA

TIO

NIN

PUT

FLU

ID D

ATA

SYST

EM U

NIT

S

DIS

PLAY

SUPE

RVISOR

CODE

CAL

IBRAT

ION

RES

TORE

FACTO

RY

CAL

IBRAT

ION

NEX

TCAL

IBRA-

TION

PRINTMAINT.

REP

ORT

SERV

ICETE

ST

SETU

P M

ENU

SSe

rviceCodeAccess

Thesefunctionswillonlyappearw

ithap-

propriatesettingsinotherfunctions.

SELE

CT

REL

AY1,2,3

LIMITSET

-PO

INT

PULS

EVA

LUE

HYS

TERES

ISREL

AYFUNC

-TION

REL

AYMODE

REL

AYS

RES

ETALA

RM

PULS

EWIDTH

REL

AYSIMULA

-TION

PROTO

COL

DEV

ICEID

BAUDRAT

EPA

RITY

NET

WO

RK

CA

RD

DP-FA

CTO

RLO

WPAS

SFILTER

LINEA

RIZAT

ION

FLOWMET

ER

LOCAT

ION

BYPA

SSCAL

.FA

CTO

RL

BYPA

SSEAM

FA

CTO

R

VIEW

INPU

TSIGNAL

VIEW

HIR

ANGE

SIGNAL

BYPA

SSDC

FACTO

RBY

PASS

YM

FACTO

R

PRINTINITIATE

PRINT

INTE

RVAL

PRINTTIME

DATAL

OG

ONLY

DATAL

OG

FORMAT

MODEM

CONTR

OL

DEV

ICE

MAS

TER

DAY

LIGHT

SAVINGS

ENGINEE

RING

CODE

TRAP

ERROR

DEL

AYTR

APBLO

W-

INGDEL

AY

SENDIN

C

TOTONLY

INCONLY

SCAL

ERCLE

AR

DATAL

OG

CAL

LON

ERROR

NUMBE

ROF

RED

IALS

HAN

GUPIF

INAC

TIVE

ERRORMAS

KMODEM

AUTO

AN

SWER

CAL

LOUTNO

CAL

LOUT

TIME

STAR

T HE

RE

ILVA

SIZE

ACCEL

ABAR

SIZE

ST2 Flow Computer

116

RS-485 & Modbus RTU Protocol WhentheFlowComputerisequippedwiththeRS-485communicationoption,theprotocolitusesistheModbusRTUprotocol.ThisprotocoldefinesamessagestructurethathostsandclientswillrecognizeanduseontheRS-485networkoverwhichtheycommunicate.Itdescribestheprocessamasterdevice(PCcompatible)usestorequestaccesstoanotherdevice(FlowComputer),howitwillrespondtorequestsfromtheotherdevices,andhowerrorswillbedetectedandreported.Itestablishesacommonformatforthelayoutandcontentsofmessagefields.

DuringcommunicationsonaModbusRTUnetwork,theprotocoldetermineshoweachFlowComputerwillknowitsdeviceaddress,recognizeamessageaddressedtoit,determinethekindofactiontobetaken,andextractanydataorotherinformationcontainedinthemessage.Ifareplyisrequired,theFlowCom-puterwillconstructthereplymessageandsenditusingModbusRTUprotocol.

RTU ModeTheFlowComputerwithRS-485communicationsoptionsupportstheModbusRTU(RemoteTerminalUnit)modeonly.TheModbusASCIImodeisnotsupported.ThemainadvantageoftheRTUmodeisthatitsgreatercharacterdensityallowsbetterdatathroughputthanASCIIforthesamebaudrate.TheModbusRTUusesaMaster-SlaveQuery-ResponseCycleinwhichtheFlowComputeristheslavedevice.

Control FunctionsTheFlowComputerwithRS-485communicationsoptionsupportsthefollowingfunctioncodes:

CODE NAME DESCRIPTION 01 ReadCoilStatus Readasinglecoil 03 ReadHoldingRegister Readarangeofholdingregisters 05 ForceSingleCoil Forcesasinglecoil(0xreference)toeitherONorOFF 06 PresetSingleRegister Presetsavalueintoasingleholdingregister(4xreference) 15 ForceMultipleCoil Forceseachcoil(0xreference)inasequenceofcoilstoeitherON

orOFF 16 PresetMultipleRegistersPresetsvaluesintoasequenceofholdingregisters(4xreference)

Appendix C- RS-485 Modbus Protocol

ST2 Flow Computer

117

Flow Computer RS-485 Port Pinout (recommended mating connector: DB-9M)

1Ground2 Ground3 Ground4 TX/RX (+)5 TX/RX (-)6 Do Not Use7 Terminating Resistor (180 Ω)8 TX/RX (+) (spare internally connected to 4)9 TX/RX (-) (spare internally connected to 5)

Flow Computer RS-485 Port Pinout (Terminal Block Option)

1Common2 TX/RX (+)3 TX/RX (-)4 Terminating Resistor (180Ω)

Installation OverviewAtwowireRS-485maybemultidroppedupto4000ft.andupto32unitsmaybechainedtogether.ARS-485toRS-232interfaceadapterisrequiredatthePC.Anopticallyisolatedtypeisrecommended.Suitablewiringshouldbeselectedbasedonanticipatedelectricalinterference.TerminatorsshouldbeusedtohelpimprovethequalityofelectronicsignalssentovertheRS-485wires.TheRS-485chainshouldbetermi-natedatthebeginning(RS-485adaptor)andatthelastdeviceintheRS-485chainandnowhereelse.OntheFlowComputerthisisaccomplishedbyconnectingajumperfromtheterminallabeledTerminating Resistor (180 Ω)totheterminallabeledTX/RX(+)attheRS-485port.Iflightningprotectionisrequired,asuitablesurgeprotectorshouldbeused.

Foradditionalinformation,refertothetechnicalrequirementsofEIA-485,interfaceadaptorusermanualandthecommunicationsoftwareusermanual

Flow Computer Communication Setup MenuThesetupmenuallowsModbusRTUProtocolcommunicationsparametersof:DeviceID,BaudRate,andParitytobeselectedtomatchtheparametersofyourRS-485network.EachFlowComputermusthaveit’sownDeviceIDandthesameBaudRateandParitysetting.

123456789

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

123456789

123456789

RS-232 RS-485 1 2

Phone Line for Internal Modem

Option

1 2 3 4

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

123456789

RS-232RS-485

Phone Line for Internal Modem

Option

1 2

Appendix C- RS-485 Modbus Protocol (continued)

ST2 Flow Computer

118

Terminal Layout for Wall Mount Option:

NEMA 12. 13 Terminal Diagram: NEMA 12. 13 Terminal Layout

RATETOTAL 267395.749

GPMGAL

147.43

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 23 24

1 2 3 4 5 6 1 2 3 4 5 61 2 3 4

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NEMA 12, 13 Terminal LayoutNEMA 12, 13 Terminal Designations


ST2 Flow Computer

119

Register Usage(eachregisteris2bytes)Flow Computer Data Register Data TypeHeatFlow Reg40001&40002 FloatMassFlow Reg40003&40004 FloatSTDVolumeFlow Reg40005&40006 FloatVolumeFlow Reg40007&40008 FloatTemperature1 Reg40009&40010 FloatTemperature2 Reg40011&40012 FloatDeltaTemperature Reg40013&40014 FloatProcessPressure Reg40015&40016 FloatDiff.Pressure Reg40017&40018 FloatDensity Reg40019&40020 FloatSpecificEnthalpy Reg40021&40022 FloatHeatTotal Reg40023&40024 FloatMassTotal Reg40025&40026 FloatSTDVolumeTotal Reg40027&40028 FloatVolumeTotal Reg40029&40030 FloatHeatGrandTotal Reg40031&40032 FloatMassGrandTotal Reg40033&40034 FloatSTDVolumeGrandTotal Reg40035&40036 FloatVolumeGrandTotal Reg40037&40038 FloatAlarmPoint1 Reg40039&40040 FloatAlarmPoint2 Reg40041&40042 FloatAlarmPoint3 Reg40043&40044 FloatYear Reg40045 IntegerMonth Reg40046 IntegerDay Reg40047 IntegerHours Reg40048 IntegerMin Reg40049 IntegerSec Reg40050 IntegerPeakDemand Reg40051&Reg40052 FloatDemandLastHour Reg40053&Reg40054 FloatViscosity Reg40055&Reg40056 FloatAbsoluteViscosity Reg40057&Reg40058 FloatRelativeHumidity Reg40059&Reg40060 FloatAccumulatedPowerLoss(HH:MM) Reg40061&Reg40062 IntegerAuxillaryDifferentialPressure Reg40063&Reg40064 Float

NOTE:TheFloatdatatypefollowstheIEEEformatfora32bitfloat.

COIL USAGE(eachcoilis1bit)

Flow Computer Data Coil Data TypeSystemAlarmPowerFailure Coil00001 bitSystemAlarmWatchdog Coil00002 bitSystemAlarmCommunicationError Coil00003 bitSystemAlarmCalibrationError Coil00004 bitSystemAlarmPrintBufferFull Coil00005 bitSystemAlarmTotalizerError Coil00006 bitSensor/ProcessAlarmWetSteamAlarm Coil00007 bitSensor/ProcessAlarmOffFluidTable Coil00008 bit

Register & Coil Usage


ST2 Flow Computer

120

Flow Computer Data Coil Data TypeSensor/ProcessAlarmFlowInOverRange Coil00009 bitSensor/ProcessAlarmInput1OverRange Coil00010 bitSensor/ProcessAlarmInput2OverRange Coil00011 bitSensor/ProcessAlarmFlowLoopBroken Coil00012 bitSensor/ProcessAlarmLoop1Broken Coil00013 bitSensor/ProcessAlarmLoop2Broken Coil00014 bitSensor/ProcessAlarmRTD1Open Coil00015 bitSensor/ProcessAlarmRTD1Short Coil00016 bitSensor/ProcessAlarmRTD2Open Coil00017 bitSensor/ProcessAlarmRTD2Short Coil00018 bitSensor/ProcessAlarmPulseOutOverrun Coil00019 bitSensor/ProcessAlarmIout1OutOfRange Coil00020 bitSensor/ProcessAlarmIout2OutOfRange Coil00021 bitSensor/ProcessAlarmRelay1HiAlarm Coil00022 bitSensor/ProcessAlarmRelay1LoAlarm Coil00023 bitSensor/ProcessAlarmRelay2HiAlarm Coil00024 bitSensor/ProcessAlarmRelay2LoAlarm Coil00025 bitSensor/ProcessAlarmRelay3HiAlarm Coil00026 bitSensor/ProcessAlarmRelay3LoAlarm Coil00027 bitServiceTest24VdcOutError Coil00028 bitServiceTestPulseInError Coil00029 bitServiceTestInput1VinError Coil00030 bitServiceTestInput1IinError Coil00031 bitServiceTestInput2IinError Coil00032 bitServiceTestInput2RTDError Coil00033 bitServiceTestInput3IinError Coil00034 bitServiceTestInput3RTDError Coil00035 bitServiceTestPulseOutError Coil00036 bitServiceTestIout1Error Coil00037 bitServiceTestIout2Error Coil00038 bitServiceTestRelay1Error Coil00039 bitServiceTestRelay2Error Coil00040 bitServiceTestRS-232Error Coil00041 bitSelfTestA/DMalfunction Coil00042 bitSelfTestProgramError Coil00043 bitSelfTestSetupDataLost Coil00044 bitSelfTestTimeClockLost Coil00045 bitSelfTestDisplayMalfunction Coil00046 bitSelfTestRamMalfunction Coil00047 bitLanguageSelect Coil00048 bitResetTotalizers Coil00049 bitResetAllErrorCodes Coil00050 bitResetAlarm1 Coil00051 bitResetAlarm2 Coil00052 bitResetAlarm3 Coil00053 bitPrintTransactionDocument Coil00054 bitResetPeakDemand Coil00055 bitResetAccumulatedPowerLoss Coil00056 bitAux.StatusInput Coil00057 bitUnused Coil00058 bitUnused Coil00059 bitUnused Coil00060 bitUnused Coil00061 bitUnused Coil00062 bitUnused Coil00063 bitUnused Coil00064 bit

Register & Coil Usage(continued)


ST2 Flow Computer

121

DECODING PART NUMBER

Example ST2 L 1 0 P 10Series: ST2 =FlowComputerDisplayType: L=LCD V=VFDInputType: 1=85to276VAC 3=24VDCNetworkCard: 0=None 1=RS-485/ModbusMounting: P=PanelMount N=NEMA4WallMount W=NEMA12/13WallMountw/ClearCover E=ExplosionProof(NoButtonAccess) X=ExplosionProof(withButtonAccess)Options: 1=PeakDemand 2=AGANX-19calculationfornaturalgas 3=ThreeRelays 4=StackedDPoption 5=Dataloggeroption 6=StackEmissionsControlleroption 7=ManifoldFlowmeterControlleroption 9=3RelaySuperChip(options1,2,4,6,7) 10=2RelaySuperChip(options1,2,4,6,7) 13=Superchip;2relay,Positiveheatonly 14=Superchip;3relay,PositiveheatonlyAccessories: KEPS-KEP1-32=32BitOPC/DDEServerfor KEPRS-232Protocol KEPS-MBS-32=32BitModbusRTUOPC/DDEserver MPP200N=IndustrialWallMountModem P1000=HandHeldPrinter CA-285=RS-232toRS-485Converter

WARRANTY

This product is warranted againstdefects inmaterialsandworkman-shipforaperiodoftwo(2)yearsfromthedateofshipmenttoBuyer.

TheWarrantyislimitedtorepairorreplacementofthedefectiveunitattheoptionofthemanufacturer.Thiswarranty is void if theproducthasbeenaltered,misused,dismantled,orotherwiseabused.

ALL OTHER WARRANTIES, EX-PRESSEDORIMPLIED,AREEX-CLUDED, INCLUDING BUT NOTLIMITEDTOTHE IMPLIEDWAR-RANTIESOFMERCHANTABILITYAND FITNESS FOR A PARTICU-LARPURPOSE.

KESSLER-ELLIS PRODUCTS 10 Industrial Way EastEatontown, NJ 07724

800-631-2165 • 732-935-1320Fax: 732-935-9344

www.kep.com

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