Niagara FC User manual

Model FC - Mass Flow Computer 990272 Rev. A 05/04/12
Model FC
Mass Flow Computer
Installation, Operation
Manual

FC Flow Computer
SAFETY INSTRUCTIONS .............................................................................................................1
1. INTRODUCTION
 1.1UnitDescription............................................................................................................2
 1.2Specications...............................................................................................................3
2. INSTALLATION
 2.1GeneralMountingHints................................................................................................8
 2.2MountingDiagrams......................................................................................................8
3. APPLICATIONS
 3.1SteamMass................................................................................................................13
 3.2SteamHeat................................................................................................................. 11
 3.3SteamNetHeat..........................................................................................................13
 3.4SteamDeltaHeat.......................................................................................................14
 3.5CorrectedGasVolume...............................................................................................15
 3.6GasMass...................................................................................................................16
 3.7GasCombustionHeat................................................................................................17
 3.8CorrectedLiquidVolume............................................................................................18
 3.9LiquidMass................................................................................................................19
 3.10LiquidCombustionHeat...........................................................................................20
 3.11LiquidSensibleHeat.................................................................................................21
 3.12LiquidDeltaHeat......................................................................................................22
 3.13Steam–CondensateHeat.......................................................................................23
4. WIRING
 4.1TerminalDesignations................................................................................................24
 4.2TypicalWiringConnections........................................................................................25
  4.2.1FlowInput...................................................................................................25
  4.2.2StackedDPInput........................................................................................25
  4.2.3PressureInput............................................................................................25
  4.2.4TemperatureInput......................................................................................26
  4.2.5Temperature2Input...................................................................................26
 4.3WiringInHazardousAreas.........................................................................................29
  4.3.1FlowInput...................................................................................................27
  4.3.2PressureInput............................................................................................27
  4.3.3TemperatureInput......................................................................................27
5. UNIT OPERATION
 5.1FrontPanelOperationConceptforOperateMode.....................................................28
 5.2GeneralOperation......................................................................................................29
 5.3PasswordProtection...................................................................................................29
 5.4RelayOperation..........................................................................................................29
5.5PulseOutput..............................................................................................................29
5.6AnalogOutputs...........................................................................................................29
5.7FunctionKeys;DisplayGrouping...............................................................................29
 5.8RS-232SerialPortOperation.....................................................................................30
  5.8.1PCCommunications...................................................................................30
  5.8.2OperationofRS-232SerialPortwithPrinters............................................30
5.9RS-485SerialPortOperation.....................................................................................30
5.10PauseComputationsPrompt....................................................................................30
6. PROGRAMMING
 6.1FrontPanelOperationConceptforProgramMode....................................................31
 6.2EZSetup....................................................................................................................32
 6.3DetailedMenuDescriptions........................................................................................34
 6.4SystemParameters....................................................................................................35
 6.5Display........................................................................................................................40
 6.6SystemUnits..............................................................................................................42
 6.7FluidData...................................................................................................................49
 6.8FlowInput...................................................................................................................54
 6.9OtherInput..................................................................................................................66
 6.10PulseOutput.............................................................................................................69
 6.11CurrentOutput..........................................................................................................70
 6.12Relays.......................................................................................................................74
 6.13Communication.........................................................................................................78
 6.14NetworkCard............................................................................................................85
 6.15Service&Analysis....................................................................................................86
CONTENTS

FC Flow Computer
7. PRINCIPLE OF OPERATION
 7.1General.......................................................................................................................92
 7.2SquareLawFlowmeterConsiderations......................................................................92
 7.3FlowEquations...........................................................................................................92
  7.3.1FlowInputComputation..............................................................................92
  7.3.2PressureComputation................................................................................93
  7.3.3TemperatureComputation..........................................................................93
  7.3.4Density/ViscosityComputation...................................................................93
  7.3.5CorrectedVolumeFlowComputation.........................................................94
  7.3.6MassFlowComputation.............................................................................95
  7.3.7CombustionHeatFlowComputation..........................................................95
  7.3.8HeatFlowComputation..............................................................................96
  7.3.9SensibleHeatFlowComputation...............................................................96
  7.3.10LiquidDeltaHeatComputation.................................................................96
  7.3.11ExpansionFactorComputationforSquareLawFlowmeters...................96
  7.3.12UncompensatedFlowComputation.........................................................98
  7.3.13ILVAFlowMeterEquations.......................................................................99
 7.4ComputationoftheD.P.Factor................................................................................100
8. RS-232 SERIAL PORT
 8.1RS-232SerialPortDescription.................................................................................101
 8.2InstrumentSetupbyPCOverSerialPort................................................................101
 8.3OperationofSerialCommunicationPortwithPrinters.............................................101
 8.4FCRS-232PortPinout.............................................................................................101
9. RS-485 SERIAL PORT
 9.1RS-485SerialPortDescription.................................................................................102
 9.2General.....................................................................................................................102
 9.3OperationofSerialCommunicationPortwithPC....................................................102
 9.4FCRS-485PortPinout.............................................................................................102
10. FLOW COMPUTER SETUP SOFTWARE
 10.1SystemRequirements............................................................................................103
 10.2CableandWiringRequirements.............................................................................103
 10.3InstallationforWindows™3.1or3.11.....................................................................103
 10.4UsingtheFlowComputerSetupSoftware.............................................................103
 10.5FileTab...................................................................................................................104
 10.6SetupTab...............................................................................................................104
 10.7ViewTab.................................................................................................................105
 10.8Misc.Tab................................................................................................................105
11. GLOSSARY OF TERMS
 10GlossaryOfTerms.....................................................................................................106
12. Diagnosis and Troubleshooting
 12.1ResponseofFConErrororAlarm.........................................................................109
 12.2DiagnosisFlowchartandTroubleshooting..............................................................109
 12.3ErrorMessages...................................................................................................... 110
Appendix A
 FluidPropertiesTable..................................................................................................... 113
Appendix B - Setup Menus
 SetupMenuswithOperatorCodeAccess...................................................................... 114
SetupMenuswithSupervisorCodeAccess................................................................... 115
Appendix C - RS-485 Modbus Protocol
 Description...................................................................................................................... 116
WiringPinoutandInstallation......................................................................................... 117
RegisterandCoilUsage................................................................................................. 119
CONTENTS

FC Flow Computer
1
!
SAFETY INSTRUCTIONS
The following instructions must be observed.
• Thisinstrumentwasdesignedandischeckedinaccordancewith
regulationsinforceEN60950(“Safetyofinformationtechnology
equipment,includingelectricalbusinessequipment”).
 Ahazardoussituationmayoccurifthisinstrumentisnotusedfor
itsintendedpurposeorisusedincorrectly.Pleasenoteoperating
instructionsprovidedinthismanual.
• Theinstrumentmustbeinstalled,operatedandmaintainedby
personnelwhohavebeenproperlytrained.Personnelmustread
andunderstandthismanualpriortoinstallationandoperationofthe
instrument.
• Themanufacturerassumesnoliabilityfordamagecausedbyincorrect
useoftheinstrumentorformodicationsorchangesmadetothe
instrument.
Technical Improvements
• Themanufacturerreservestherighttomodifytechnicaldatawithout
priornotice.

FC Flow Computer
2
1. Introduction
PeakDemandOption
Thereareapplicationswherecustomerchargesaredetermined
inpartbythehighesthourlyaveragedowrateobservedduring
abillingperiod.
ThepeakdemandoptionfortheFCisintendedforapplica-
tionswhereitisimportanttocomputesuchanhourlyaverage
owrate,tonotethevalueofthepeakoccurrenceandthecor-
respondingtimeanddateofthatevent.
Thedemandlasthourrateiscomputedbasedonthecurrent
totalandthetotal60minutesprior.Thisvalueisrecomputed
every5minutes.
Thepeakdemandisthehighestvalueobservedinthedemand
lasthour.
Thetimeanddatestampisthetimeanddateatwhichthehigh-
estpeakdemandoccurred.
TheDemandLastHourand/orPeakDemandcanbedirectly
viewedonthedisplaybypressingtheRATEkeyandthen
scrollingthroughtherateswiththe^/varrowkeyuntilthede-
sireditemisviewed.
ThePeakTimeandDatestampcanbeviewedonthedisplay
bypressingtheTIMEandthenscrollingthroughthetimere-
latedparametersusingthe^/varrowkeysuntilthedesireditem
isviewed.
Alloftheseitemscanbeincludedintothescrollingdisplaylist
alongwiththeotherprocessvaluesandtotalizersinauser
selectablelist.
ThepeakdemandmaybeclearedbypressingtheCLEARkey
whileviewingthePEAKDEMANDorbymeansofacommand
ontheserialport.
ThePeakTimeandDatestampcanbeviewedonthedisplay
bypressingtheTIMEandthenscrollingthroughthetimere-
latedparametersusingthe^/varrowkeysuntilthedesireditem
isviewed.
TheDemandLastHourandPeakDemandcanbeassigned
tooneoftheanalogoutputs.Thedemandlasthourorpeak
demandcouldthuslybeoutputonarecordingdevicesuchas
astripchartrecorderorfedintoabuildingenergyautomation
system.
TheDemandLastHourandPeakDemandcanbeassigned
tooneoftherelays.Thecustomercanbenotiedthatheis
approachingorexceedingacontracthighlimitbyassigningthe
demandlasthourtooneoftherelaysandsettingthewarn-
ingpointintothesetpoint.Awarningmessagewouldalsobe
displayed.
Thepeakdemandmaybeusedinconjunctionwiththeprintlist
anddataloggertokeeptrackofhourlycustomerusageproles.
TheDemandLastHour,PeakDemand,andTimeandDate
Stampinformationcanbeaccessedovertheserialports.The
PeakDemandmayalsoberesetovertheserialports.
Thepeakdemandoptionmayalsobeusedasaconditionto
calloutinremotemeteringbymodem.
EZ Setup
TheunithasaspecialEZsetupfeaturewheretheuserisguided
through a minimum number of steps to rapidly congure the
instrumentfortheintendeduse.TheEZsetuppreparesaseries
ofquestionsbasedonowequation,uid,andowmetertype
desiredintheapplication.
1.1 Unit Description:
The FC Flow Computer satises the instrument requirements
foravarietyofowmetertypes inliquid,gas,steamand heat
applications. Multiple ow equations are available in a single
instrumentwithmanyadvancedfeatures.
Thealphanumericdisplayoffersmeasuredparametersineasyto
understandformat.Manualaccesstomeasurementsanddisplay
scrollingissupported.
TheversatilityoftheFlowComputerpermitsawidemeasureof
applicationswithintheinstrumentpackage.Thevarioushardware
inputsandoutputscanbe“soft”assignedtomeetavarietyof
commonapplicationneeds.Theuser“softselects”theusageof
eachinput/outputwhileconguringtheinstrument.
Theisolatedanalogoutputcanbechosentofollowthevolume
ow,correctedvolumeow,massow,heatow,temperature,
pressure,ordensitybymeansofamenuselection.Mosthardware
featuresareassignablebythismethod.
TheusercanassignthestandardRS-232SerialPortfordata
logging,ortransactionprinting,orforconnectiontoamodemfor
remotemeterreading.
APCCompatiblesoftwareprogramisavailablewhichpermitsthe
usertorapidlyredenetheinstrumentconguration.
Languagetranslationoptionfeaturesalsopermittheusertodene
hisownmessages,labels,andoperatorprompts.Thesefeatures
maybeutilizedattheOEMleveltocreativelycustomizetheunit
foranapplicationoralternatelytoprovideforforeignlanguage
translations.BothEnglishandasecondlanguageresidewithin
theunit.
NX-19option
AdvancedorderingoptionsareavailableforNaturalGascalculations
wheretheuserrequirescompensationforcompressibilityeffects.
Compensationforthesecompressibilityeffectsarerequiredat
mediumtohighpressureandareafunctionofthegasspecic
gravity,%CO2,%Nitrogen,aswellastemperatureandpressure.
ThecompressibilityalgorithmusedisthatforNX-19.
Stackeddifferentialpressuretransmitteroption
ThisoptionpermitstheuseofalowrangeandhighrangeDP
transmitteronasingleprimaryelementtoimproveowtransducer
andmeasurementaccuracy.
Peakdemandoption
Thisoptionpermitsthedeterminationofanhourlyaveragedow
rate.Demandlasthour,peakdemandandtime/datestampingfor
applicationsinvolvingpremiumbilling.
Dataloggingoption
Thisoptionprovidesdatastorageinformationin64kofbattery
backedRAM.Itemstobelogged,conditionstoinitiatethelogand
avarietyofutilitiestoclearandaccessthedataviatheRS-232
portareprovided.

FC Flow Computer
3
1.2 Specications:
Environmental
OperatingTemperature:0to+50C
StorageTemperature:-40to+85C
Humidity:0-95%Non-condensing
Materials:UL,CSA,VDEapproved
Approvals: CEApprovedLightIndustrial,UL/CSAPending
Display
Type:2linesof20characters
Types:BacklitLCDandVFDorderingoptions
CharacterSize:0.3"nominal
Userselectablelabeldescriptorsandunitsofmeasure
Keypad
KeypadType:MembraneKeypad
KeypadRating:SealedtoNema4
Numberofkeys:16
RaisedKeyEmbossing
Enclosure
EnclosureOptions:Panel,Wall,ExplosionProof
Size:SeeChapter2;Installation
Depthbehindpanel:6.5"includingmatingconnector
Type:DIN
Materials:Plastic,UL94V-0,Flameretardant
Bezel:Texturedpermattnish
EquipmentLabels:Model,safety,anduserwiring
NX-19 Compressibility Calculations
 Temperature  -40to240F
 Pressure  0to5000psi
 SpecicGravity  0.554to1.0
 Mole%CO2  0to15%
 Mole%Nitrogen  0to15%
Power Input
The factory equipped power options are internally fused.
Aninternallinetolineltercapacitorisprovidedforadded
transientsuppression.MOVprotectionforsurgetransientis
alsosupported
UniversalACPowerOption:
 85to276Vrms,50/60Hz
 Fuse:TimeDelayFuse,250V,500mA
DCPowerOption:
 24VDC(16to48VDC)
 Fuse:TimeDelayFuse,250V,1.5A
 TransientSuppression:1000V
Flow Inputs:
Flowmeter Types Supported:
Linear:
 Vortex,Turbine,PositiveDisplacement,Magnetic,
GilFlo,GilFlo16point,ILVA16Point,MassFlow
andothers
SquareLaw:
 Orice,Venturi,Nozzle,V-Cone,Wedge,Averaging
Pitot,Target,Verabar,Accelabarandothers
Multi-PointLinearization:
 Maybeusedwithallowmetertypes.Including:16
point,UVCanddynamiccompensation.
Analog Input:
Ranges
 Voltage:0-10VDC,0-5VDC,1-5VDC
 Current:4-20mA,0-20mA
BasicMeasurementResolution:16bit
UpdateRate:2updates/secminimum
Accuracy:0.02%FS
AutomaticFaultdetection: Signalover/under-range,
 CurrentLoopBroken
Calibration: Operatorassisted learnmode. LearnsZero
andFullScaleofeachrange
FaultProtection:
 FastTransient:1000VProtection(capacitiveclamp)
 ReversePolarity:Noilleffects
 Over-VoltageLimit: 5 0  V D C  O v e r  v o l t a g e
protection
 Over-CurrentProtection: Internallycurrentlimited
    protectedto24VDC
Optional:StackedDPtransmitter0-20mAor4-20mA
Pulse Inputs:
NumberofFlowInputs:one
InputImpedance:10kΩnominal
TriggerLevel:(menuselectable)
 HighLevelInput
 LogicOn: 2to30VDC
 LogicOff: 0to.9VDC
 LowLevelInput(magpickup)
 Selectablesensitivity:10mVand100mV
MinimumCountSpeed:0.25Hz
MaximumCountSpeed:Selectable:0to40kHz
OvervoltageProtection:50VDC
FastTransient:Protectedto1000VDC(capacitiveclamp)
Temperature, Pressure, Density Inputs
The compensation inputs usage are menu selectable for
temperature, temperature 2, pressure,  density, steam trap
monitorornotused.
Calibration:Operatorassistedlearnmode
Operation:Ratiometric
Accuracy:0.02%FS
ThermalDrift:Lessthan100ppm/C
BasicMeasurementResolution:16bit
UpdateRate:2updates/secminimum
AutomaticFaultdetection:
 SignalOver-range/under-range
 CurrentLoopBroken
 RTDshort
 RTDopen
 TransientProtection:1000V(capacitiveclamp)
 ReversePolarity:Noilleffects
 Over-VoltageLimit(VoltageInput):50VDC
 Over-CurrentLimit(Internallylimitedtoprotectinputto
 24VDC)
AvailableInputRanges
 (Temperature/Pressure/Density/TrapMonitor)
 Current:4-20mA,0-20mA
 Resistance:100OhmsDINRTD
100OhmDINRTD(DIN43-760,BS1904):
 ThreeWireLeadCompensation
 InternalRTDlinearizationlearnsicepointresistance
 1mAExcitationcurrentwithreversepolarityprotection
 TemperatureResolution:0.1°C
 TemperatureAccuracy:0.5°C

FC Flow Computer
4
Datalogger (optional)
Type:BatteryBackedRAM
Size: 64k
Initiate:Key,IntervalorTimeofDay
ItemsIncluded:SelectableList
DataFormat:PrinterorCSVAccessviaRS-232command
Stored Information (ROM)
Steam Tables (saturated & superheated),  General Fluid
Properties, Properties of Water, Properties of Air, Natural
Gas
User Entered Stored Information (EEPROM / Nonvolatile
RAM)
TransmitterRanges,SignalTypes
FluidProperties
 (specific gravity, expansion factor, specific heat,
viscosity,
 isentropicexponent,combustionheatingvalue,Zfactor,
 RelativeHumidity)
UnitsSelections(English/Metric)
RS-232 Communication
Uses:Printing,Setup,Modem,Datalogging
BaudRates:300,1200,2400,9600
Parity:None,Odd,Even
DeviceID:0to99
Protocol:Proprietary,Contactfactoryformoreinformation
ChassisConnectorStyle:DB9Femaleconnector
PowerOutput: 8V(150mAmax.)providedtoModem
RS-485 Communication(optional)
Uses:NetworkCommunications
BaudRates:300,600,1200,2400,4800,9600,19200
Parity:None,Odd,Even
DeviceID:1to247
Protocol:ModBusRTU
ChassisConnectorStyle:DB9Femaleconnector(standard)
Excitation Voltage
24VDC@100mAovercurrentprotected
Relay Outputs
Therelayoutputsusageismenuassignableto(Individually
for each relay) Hi/Lo Flow Rate Alarm, Hi/Lo Temperature
Alarm,Hi/LoPressureAlarm,PulseOutput(pulseoptions),
WetSteamorGeneralpurposewarning(security).
(Peakdemandanddemandlasthouroptional)
Numberofrelays:2(3optional)
ContactStyle:FormCcontacts(FormAwith3relayoption)
ContactRatings:240V,1amp
FastTransientThreshold:2000V
Analog Outputs
Theanalogoutputusageismenuassignabletocorrespond
tothe HeatRate, UncompensatedVolume Rate,Corrected
Volume Rate, Mass Rate, Temperature, Density, or
Pressure.
(Peakdemandanddemandlasthouroptional)
NumberofOutputs:2
Type:IsolatedCurrentSourcing(sharedcommon)
IsolatedI/P/C:500V
AvailableRanges:0-20mA,4-20mA(menuselectable)
Resolution:16bit
Accuracy:0.05%FSat20DegreesC
UpdateRate:5updates/sec
TemperatureDrift:Lessthan200ppm/C
MaximumLoad:1000ohms
ComplianceEffect:Lessthan.05%Span
60Hzrejection:40dBminimum
EMI:Noeffectat10V/M
Calibration:OperatorassistedLearnMode
Averaging: UserentryofDSPAveragingconstantto
 causeansmoothcontrolaction
Isolated Pulse output
TheisolatedpulseoutputismenuassignabletoUncompensated
VolumeTotal,CompensatedVolumeTotal,HeatTotalorMass
Total.
IsolationI/O/P:500V
PulseOutputForm(menuselectable):OpenCollectorNPNor
24VDCvoltagepulse
NominalOnVoltage:24VDC
MaximumSinkCurrent:25mA
MaximumSourceCurrent:25mA
MaximumOffVoltage:30VDC
SaturationVoltage:0.4VDC
PulseDuration:Userselectable
Pulseoutputbuffer:8bit
Real Time Clock
TheFlowComputerisequippedwitheitherasupercapora
batterybackedrealtimeclockwithdisplayoftimeanddate.
Format:
 24hourformatfortime
 Day,Month,Yearformatfordate
 DaylightSavingsTime(optional)
Measurement
The Flow Computer can be thought of as making a series
ofmeasurementsofow,temperature/densityandpressure
sensors and then performing  calculations to arrive at a
result(s)whichisthenupdatedperiodicallyonthedisplay.The
analogoutputs,thepulseoutput,andthealarmrelaysarealso
updated.Thecyclethenrepeatsitself.
Step1: Updatethemeasurementsofinputsignals-
Raw Input Measurements are made at each input using
equationsbasedoninputsignaltypeselected.Thesystem
notesthe“outofrange”inputsignalasanalarmcondition.
Step2: ComputetheFlowingFluidParameters-
Thetemperature,pressure, viscosityanddensity equations
arecomputedasneededbasedontheowequationandinput
usageselectedbytheuser.

FC Flow Computer
5
Step3:ComputetheVolumetricFlow-
Volumetricowisthetermgiventotheowinvolumeunits.
The value is computed based on the owmeter input type
selected and augmented by any performance enhancing
linearizationthathasbeenspeciedbytheuser.
Step4:ComputetheCorrectedVolumeFlowatReference
Conditions-
Inthecaseofacorrectedliquidorgasvolumeowcalculation,
the corrected volume ow is computed as required by the
selectedcompensationequation.
Step5:ComputetheMassFlow-
Allrequiredinformationisnowavailabletocomputethemass
owrateasvolumeowtimesdensity.Aheatowcomputation
isalsomadeifrequired.
Step6:CheckFlowAlarms-
The ow alarm functions have been assigned to one of
the above ow rates during the setup of the instrument.A
comparisonisnowmadebycomparingthecurrentowrates
againstthespeciedhiandlowlimits.
Step7:ComputetheAnalogOutput-
Thisdesignatedowratevalueisnowusedtocomputethe
analogoutput.
Step8:ComputetheFlowTotalsbySummation-
A ow total increment is computed for each ow rate. This
incrementiscomputedbymultiplyingtherespectiveowrate
byatimebasescalerandthensumming.Thetotalizerformat
alsoincludesprovisionsfortotalrollover.
Step9:PulseOutputService-
Thepulseoutputisnextupdatedbyscalingthetotalincrement
whichhasjustbeendeterminedbythepulseoutputscalerand
summingittoanyresidualpulseoutputamount.
Step10:UpdateDisplayandPrinterOutput-
Theinstrumentnallyrunsatasktoupdatethevarioustable
entries associated with the front panel display and serial
outputs.
Instrument Setup
Thesetupispasswordprotectedbymeansofanumericlock
outcodeestablishedbytheuser.Thehelplineandunitsof
measurepromptsassureeasyentryofparameters.
An EZ Setup function is supported to rapidly congure the
instrument for rst time use. A software program is also
available which runs on a PC using a RS-232 Serial for
connectiontotheFlowComputer.Illustrativeexamplesmay
bedownloadedinthismanner.
The standard setup menu has numerous subgrouping of
parameters needed for ow calculations. There is a well
conceived hierarchy to the setup parameter list. Selections
made at the beginning of the setup automatically affect
offeringsfurtherdowninthelists,minimizingthenumberof
questionsaskedoftheuser.
In the setup menu, the ow computer activates the correct
setup variables based on the instrument conguration, the
ow equation, and the hardware selections made for the
compensation transmitter type, the ow transmitter type,
andmeterenhancements(linearization)optionsselected.All
requiredsetupparametersareenabled.Allsetupparameters
notrequiredaresuppressed.
Alsonotethatinthemenuareparameterselectionswhichhave
preassignedindustrystandardvalues.Theunitwillassume
thesevaluesunlesstheyaremodiedbytheuser.
Mostoftheprocessinputvariableshaveavailablea“default”
oremergency valuewhich mustbe entered.Theseare the
valuesthattheunitassumeswhenamalfunctionisdetermined
tohaveoccurredonthecorrespondinginput.
It is possible to enter in a nominal constant value for
temperature or density, or pressure inputs by placing the
desirednominal value intothe default valuesand selecting
"manual".Thisisalsoaconveniencewhenperformingbench
toptestswithoutsimulators.
Thesystemalsoprovidesaminimumimplementationofan
“audittrail”whichtrackssignicantsetupchangestotheunit.
This feature is increasingly being found of benet to users
or simply required by Weights and Measurement Ofcials
in systems used in commerce, trade, or “custody transfer”
applications.
Simulation and Self Checking:
Thismodeprovidesanumberofspecializedutilitiesrequired
forfactory calibration,instrumentcheckoutonstart-up, and
periodiccalibrationdocumentation.
A service password is required to gain access to this
specializedmodeof operation.Normallyquality, calibration,
andmaintenancepersonnelwillndthismodeofoperation
veryuseful.
Manyofthese tests maybe used duringstart-upof a new
system.Outputsignalsmaybeexercisedtoverifytheelectrical
interconnectsbeforetheentiresystemisputonline.
ThefollowingactionitemsmaybeperformedintheDiagnostic
Mode:
PrintCalibration/MaintenanceReport
ViewSignalInput(Voltage,Current,Resistance,Frequency)
ExamineAuditTrail
PerformaSelfTest
PerformaServiceTest
ViewErrorHistory
PerformPulseOutputCheckout/Simulation
PerformRelayOutputCheckout/Simulation
PerformAnalogOutputCheckout/Simulation
CalibrateAnalogInputsusingtheLearnFeature
CalibrateAnalogOutputusingtheLearnFeature
ScheduleNextMaintenanceDate
Notethatacalibrationoftheanaloginput/outputwilladvance
the audit trail counters since it effects the accuracy of the
system.

FC Flow Computer
6
Operation of Steam Trap Monitor
In applications on Saturated Steam, the otherwise unused
CompensationInputmaybeconnectedtoasteamtrapmonitor
thatoffersthefollowingcompatibleoutputsignallevels:
4mA=trapcold
12mA=trapwarmandopen(blowing)
20mA=trapwarmandclosed
Innormaloperationasteamtrapiswarmandperiodicallyopens
andclosesinresponsetotheaccumulationofcondensate.A
coldtrapisindicationthatitisnotpurgingthecondensate,a
trapthatisconstantlyblowingisanindicationthatitisstuck
open. To avoid a false alarm, the FC permits the user to
programadelay,ortimeperiod,whichshouldbeconsidered
normalforthetraptobeeithercold,oropen.Analarmwill
onlybeactivatedifthetrapisdetectedascontinuouslybeing
intheabnormalstatesforatimeperiodgreaterthanthisTRAP
ERRORDELAYtime.
The user selects to use the Compensation Input for Trap
Monitoringbyselecting“4-20mATRAPSTATUSastheINPUT
SIGNALforOTHERINPUT1.
Theusercan programtheERROR DELAYtime in HH:MM
formatintoboththeTRAPERRORDELAY(coldtraperror)
menu and the TRAP BLOWING DELAY (trap stuck open)
menu.
The FC will warn the operator of a TRAP ERROR when
an abnormal condition is detected. The error can be
acknowledged by pressing the ENTER key. However, the
problem may reassert itself if there is a continued problem
withthesteamtrap.
Inaddition,theeventisnotedintheERRORLOG.
Itisalsopossiblefortheusertoprogramatrapmalfunction
asoneoftheconditionsworthyofaCALLOUTofaproblem
byselectingthiserrorintheERRORMASK.
TheData-LoggingoptionoftheFCcanalsobeusedtologthe
performanceofthetrapbystoringthe%oftimethetraphas
beencold,and/orblowingopenduringthedataloginterval.
Datalogging Option
The Datalogging Option for the FC permits the user to
automaticallystoresetsofdataitemsasarecordonaperiodic
basis.Adatalogrecordmaybestoredastheresultofeithera
PRINTkeydepression,oranINTERVAL,oraTIMEOFDAY
requestforadatalog.
Theuserdenesthelistofitemstobeincludedineachdatalog
byselectingtheseinthePRINTLISTmenulocatedwithinthe
COMMUNICATIONSSUBMENU.
Theuserselectswhatwilltriggeradatalogrecordbeingstored
inthePRINTINITIATEmenu.ThechoicesarePRINTKEY,
INTERVAL,andTIMEOFDAY.
The user can select the datalog store interval in a HH:MM
formatinthePRINTINTERVALmenu.
Theusercanalsoselectthestoretimeofdayina24hrHH:
MMformatinthePRINTTIMEmenu.
Theusercanalsodenewhetherhejustwantsthedatastored
intothedatalogger,orifhewantsthedatabothstoredinthe
dataloggerandsentoutovertheRS232portintheDATALOG
ONLYmenu.
Theusercandenetheformathewishesthedatatobeoutput
inusingtheDATALOGFORMATmenu.ChoicesarePRINTER
andDATABASE.PRINTERformatwilloutputthedatarecords
inaformsuitabletodumptoaprinter.DATABASEformatwill
outputthevaluesinaCSV,orCommaSeparatedVariablewith
Carriagereturndelimitingofeachrecord.
Anumberofserialcommandsarealsoincludedtoaccessand
manipulateinformationstoredwithinthedatalogger.Among
theseRS232commandcapabilitiesarethefollowingactions:
ClearDataLogger
SendallDatainDatalogger
SendOnlyNewDatasinceDataloggerwaslastRead
SendDataforthedateincludedintherequest
SendthecolumnheadingtextfortheCSVdataelds
SendthecolumnunitsofmeasuretextfortheCSVdata
elds
Storeonenewrecordintodataloggernow
ReadNumberofNewRecordsinthedatalogger
Readnumberofrecordscurrentlyinthedatalogger
Read the maximum number of records capacity of the
datalogger
MovePointerBackNrecords
DumpRecordatPointer
Dumprecordsnewerthanpointer
DumpdatafromNrecordsback
ThedataloggeroptionisusedinconjunctionwiththeRS-232
portinremotemeteringapplications.
The technical details associated with the serial commands
arelistedinUniversalSerialProtocolManualavailableupon
request.
RS-232 Serial Port
TheFlowComputerhasa generalpurposeRS-232Port
whichmaybeusedforanyoneofthefollowingpurposes:
 TransactionPrinting
 DataLogging
 RemoteMeteringbyModem
 ComputerCommunicationLink
 CongurationbyComputer
 PrintSystemSetup
 PrintCalibration/MalfunctionHistory
Instrument Setup by PC’s over Serial Port
ADisketteprogramisprovidedwiththeFlowComputerthat
enablestheusertorapidlyconguretheFlowComputer
usinganPersonnelComputer.Includedonthedisketteare
commoninstrumentapplicationswhichmaybeusedasa
startingpointforyourapplication.Thispermitstheuserto
haveanexcellentstartingpointandhelpsspeedtheuser
throughtheinstrumentsetup.

FC Flow Computer
7
Operation of Serial Communication Port with Printers
TheFlowComputer’sRS-232channelsupportsanumber
of operating modes. One of these modes is intended to
support operation with a printer in metering applications
requiringtransactionprinting,dataloggingand/orprinting
ofcalibrationandmaintenancereports.
Fortransactionprinting,the userdenestheitemsto be
includedintheprinteddocument.Theusercanalsoselect
whatinitiatesthetransactionprintgeneratedaspartofthe
setupoftheinstrument.Thetransactiondocumentmaybe
initiatedviaafrontpanelkeydepression.
Indatalogging,theuserdenestheitemstobeincludedin
eachdatalogasaprintlist.Theusercanalsoselectwhen
orhowoftenhewishesadatalogtobemade.Thisisdone
duringthesetupoftheinstrumentaseitheratimeofdayor
asatimeintervalbetweenlogging.
The system setup and maintenance report list all the
instrument setup parameters and usage for the current
instrument configuration. In addition, the Audit trail
informationispresentedaswellasastatusreportlistingany
observedmalfunctionswhichhavenotbeencorrected.
Theuserinitiatestheprintingofthisreportatadesignated
point in the menu by pressing the print key on the front
panel.
Operating Serial Communication Port with Modems
TheFCoffersanumberofcapabilitiesthatfacilitateitsuse
withmodems.TheFC’sRS232portcanbeconnectedto
amodeminordertoimplementaremotemeteringsystem
that uses either the phone companies standard phone
linesorcellulartelephone system.Inadditionto remote
meter readings, the serial commands may also be used
toexamineand/ormakesetupchangestotheunit,andto
checkforproperoperationorinvestigateproblems.Several
hundredcommandsaresupported.Acompatibleindustrial
modemaccessoryandinterconnectingcablingisofferedin
theMPP2400NspecicallydesignedforusewiththeFC.
TheFCandModemcanbeusedtogethertocreatesystems
withoneormoreofthefollowingcapabilities:
1. PolltheFCunitforinformationfromaremotePC.
2. CallOutfromtheFCunittoaremotePConascheduled
readingtimeand/orcrisisbasis
3. Somecombinationoftheabovetwodescriptionswhere
theunitispolledbyonePCandcallsintotoadifferent
PCifaproblemisdetected.
Infact,uptoveFCunitscansharethesamemodem.Each
FCmusthaveauniqueDEVICEID.Thismultidroppingof
owcomputersonasinglemodemispopularwhenthere
areseveralowcomputersmountedneareachother.
In most applications using modem communications, the
FC’sRS232USAGEisrstsetequaltoMODEM.EachFC
onasharedmodemcableisgivenauniqueserialdevice
addressorDEVICEID.TheBAUDRATEiscommonlyset
to2400,thePARITYsettoNONE,andtheHANSHAKING
settoNONEtocompletethebasicsetup.TheremotePC’s
communicationsettingsarechosentomatchthese.
The level of complexity of the Supetrol-2 to Modem
connectioncanrangefromsimpletomorecomplex.
InasimplesystemaremotePCwillcallintothetelephone
numberofthe modem.The modemwillanswer the call,
andestablishaconnectionbetweentheFCandtheremote
PC.Anexchangeofinformationcannowoccur.TheFCwill
actasaslaveandrespondtocommandsandrequestsfor
informationfromtheremoteMASTERPC.TheMASTER
PCwillendtheexchangebyhandingup.
However,it ismorecommon thattheFCwillbeusedto
control the modem. In these applications the following
communicationmenusettingswouldbeused:
 RS232USAGE=MODEM
 DEVICE ID, BAUD RATE, PARITY, and
HANDSHAKINGareset
 MODEMCONTROL=YES
 DEVICE MASTER = YES  (When multidropping
several FC's, only one unit will be the DEVICE
MASTER)
 MODEMAUTOANSWER=YES(Thisinstructsthe
unittoanswerincomingcalls)
 HANGUPIFINACTIVE=YES(Thisinstructstheunit
tohangupthelineifnoactivitiesoccurwithinseveral
minutes).
A more complex form of a remote metering system can
beimplementedwheretheFCwillinitiateacalltocontact
theremotePCatascheduledtimeand/orintheeventofa
problemthathasbeendetected.Intheseapplicationsthe
FChasadditionalsetupcapabilitiesincluding:
 TheFCmusthaveauniqueidentierassignedtoit
(usingtheTAGNUMBER)
 CallOutTelephonenumbermustbeenteredinthe
CALLOUTNUMBER
 Thescheduledcallouttimeforthedailyreadingmust
beenteredinCALLOUTTIME
 Adecisionmustbemadewhethertheunitwillbeused
tocallonerror(s)inCALLONERROR
 Theparticularerrorconditionstocalloutonmustbe
denedintheERRORMASK
 TheNUMBEROFREDIALStobeattemptediflineis
busymustbeenteredinthatcell
 HANGUPIFINACTIVE=YESwilldisconnectthecall
ifremotecomputerdoesnotrespond.
ConsulttheUniversalSerialCommandsUserManualfor
detailsontheindividualcommandssupportedbytheFC.
ContacttheFlowApplicationsGroupforadiscussiononthe
remotemeteringsystemcapabilitiesyouareconsidering.
NOTE: Some modems can be congured in advance to
answer incoming calls, terminate phone connections if
communicationsislost.Insuchapplicationstheremaybe
noneedfortheFCtobefunctioningto“control”themodem.
SettingtheRS233USAGE=COMPUTERwilllikelywork.
RS-485 Serial Port (optional)
The RS-485 serial port can be used for accessing ow
rate,total,pressure,temperature,densityandalarmstatus
information.Theportcanalsobeusedforchangingpresets
andacknowledgingalarms.

FC Flow Computer
8
2. Installation
2.1 General Mounting Hints:
TheFCFlowComputershouldbelocatedinanareawithaclean,dryatmosphere
whichisrelativelyfreeofshockandvibration.Theunitisinstalledina5.43"(138mm)
wideby2.68"(68mm)highpanelcutout.(seeMountingDimensions)Tomountthe
FlowComputer,proceedasfollows:
a.Preparethepanelopening.
b.Slidetheunitthroughthepanelcutoutuntiltheittouchesthepanel.
c.Installthescrews(provided)inthemountingbracketandslipthebracketoverthe
rearofthecaseuntilitsnapsinplace.
d.Tightenthescrewsrmlytoattachthebezeltothepanel.3in.lb.oftorquemust
beappliedandthebezelmustbeparalleltothepanel.
NOTE: TosealtoNEMA4X/IP65specications,suppliedbezelkitmustbeused
andpanelcannotexmorethan.010".
 Whentheoptionalbezelkitisused,thebezeladaptormustbesealedto
thecaseusinganRTVtypesealertomaintainNEMA4X/IP65rating.
General Mounting Hints
Mounting Procedure
NEMA4X / IP65 Specications
FC FC
BezelAdaptor
Gasket
MountingBracket
MountingBracket
Standard Mounting Bezel Kit Mounting
Dimensions
Dotted Line Shows Optional Bezel Kit
Panel
Cutout
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:

FC 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 (59.5)
8.4 (213.4)
4.13 (105)
2.33 (59)
0.385
(9.8)
Security Tag
Provisions
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 (mountingoptionW)
2.2 Mounting Diagrams:
(continued)
NEMA4 Wall Mount (mountingoptionN)

FC Flow Computer
10
Explosion Proof Mount (mountingoptionX)
2.2 Mounting Diagrams:
(continued)
Explosion Proof Mount (mountingoptionE)
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-2B
TAP x 5/16" DEEP
(6) HOLES CENTERED
ON THREE SIDES FOR
MOUNTING
1/2"- 14 NPT PLUGS
(2 PLACES)
10.6
(269.2)
1/4" - 20UNC-2B
TAP x 5/16" DEEP
(6) HOLES CENTERED
ON THREE SIDES FOR
MOUNTING
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)

FC Flow Computer
11
3.1 Steam Mass
Measurements:
Aowmetermeasurestheactualvolumeowinasteamline.Atemperatureand/or
pressuresensorisinstalledtomeasuretemperatureand/orpressure.
Calculations:
• Density and mass ow are calculated using the steam tables stored in the ow
computer.
• With square law device measurement  the actual volume is calculated from the
differentialpressure,takingintoaccounttemperatureandpressurecompensation.
• Saturatedsteamrequireseitherapressureortemperaturemeasurementwiththeother
variablecalculatedusingthesaturatedsteamcurve.
• OptionalsteamtrapmonitoringusingCompensationInput1.
Input Variables:
Superheated Steam: Flow,temperatureandpressure
Saturated Steam: Flow,temperatureorpressure
Output Results:
• DisplayResults
  MassorVolumeFlowRate,ResettableTotal,Non-ResettableTotal,Temperature,
Pressure,Density(optional:peakdemand,demandlasthour,time/datestamp)
• AnalogOutput
  Mass or Volume Flow Rate, Temperature, Pressure Density, Peak Demand,
DemandLastHour
• PulseOutput
  MassorVolumeTotal
• RelayOutputs
  Mass or Volume Flow Rate , Total, Pressure, Temperature, Alarms, Peak
Demand,DemandLastHour
Applications:
Monitoring mass ow and total of steam. Flow alarms are provided via relays and
dataloggingisavailableviaanalog(4-20mA)andserialoutputs.
STEAM MASS
Steam Mass
Illustration
3. Applications
FlowmeterTemperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Pressure
Transmitter
Mass Flow
MassFlow=volumeow•density(T,p)
Calculations
*
* or Steam Trap Monitor
*
* or Steam Trap Monitor

FC Flow Computer
12
3.2 Steam Heat
Measurements:
Aowmetermeasurestheactualvolumeowinasteamline.Atemperatureand/or
pressuresensorisinstalledtomeasuretemperatureand/orpressure.
Calculations:
• Density,massowandheatowarecalculatedusingthesteamtablesstoredinthe
owcomputer.Theheatisdenedastheenthalpyofsteamunderactualconditions
withreferencetotheenthalpyofwateratT=0°C.
• With square law device measurement  the actual volume is calculated from the
differentialpressure,takingintoaccounttemperatureandpressurecompensation.
• Saturatedsteamrequireseitherapressureortemperaturemeasurementwiththeother
variablecalculatedusingthesaturatedsteamcurve.
• Optionalsteamtrapmonitoringusingcompensationinput.
Input Variables:
Superheated Steam: Flow,temperatureandpressure
Saturated Steam: Flow,temperatureorpressure
Output Results:
• DisplayResults
  Heat, Mass or Volume Flow Rate, Resettable Total, Non-Resettable Total,
Temperature, Pressure, Density (optional: peak demand, demand last hour,
time/datestamp)
• AnalogOutput
  Heat, Mass or Volume Flow Rate, Temperature, Pressure, Density, Peak
Demand,DemandLastHour
• PulseOutput
  Heat,MassorVolumeTotal
• RelayOutputs
  Heat,MassorVolumeFlowRate,Total,Pressure,TemperatureAlarms,Peak
Demand,DemandLastHour
Applications:
Monitoringheatowandtotalheatofsteam.Flowalarmsareprovidedviarelaysand
dataloggingisavailableviaanalog(4-20mA)andserialoutputs.
STEAM HEAT
Heat Flow
HeatFlow=Volumeow•density(T,p)•Sp.Enthalpyofsteam(T,p)
Calculations
Steam Heat
Illustration
Temperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Pressure
Transmitter
Orifice Plate
with DP Transmitter
FlowmeterTemperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Pressure
Transmitter
*
* or Steam Trap Monitor
*
* or Steam Trap Monitor

FC Flow Computer
13
3.3 Steam Net Heat
Measurements:
A owmetermeasurestheactual volumeowinasteamline.Atemperatureand a
pressuresensorareinstalledtomeasuretemperatureand/orpressure.Allmeasurement
aremadeonthesteamsideofaheatexchanger.
Calculations:
• Density,massowandnetheatowarecalculatedusingthesteamtablesstoredinthe
owcomputer.Thenetheatisdenedasthedifferencebetweentheheatofthesteam
andtheheatofthecondensate.Forsimplicationitisassumedthatthecondensate
(water)hasatemperaturewhichcorrespondstothetemperatureofsaturatedsteam
atthepressuremeasuredupstreamoftheheatexchanger.
• With square law device measurement  the actual volume is calculated from the
differentialpressure,takingintoaccounttemperatureandpressurecompensation.
• Saturatedsteamrequireseitherapressureortemperaturemeasurementwiththeother
variablecalculatedusingthesaturatedsteamcurve.
• Optionalsteamtrapmonitoringusingcompensationinput.
Input Variables:
Superheated Steam: Flow,temperatureandpressure
Saturated Steam: Flow,temperatureorpressure
Output Results:
• DisplayResults
  Heat, Mass or Volume Flow Rate, Resettable Total, Non-Resettable Total,
Temperature, Pressure, Density, (optional: peak demand, demand last hour,
time/datestamp)
• AnalogOutput
  Heat, Mass or Volume Flow Rate, Temperature, Pressure, Density, Peak
Demand,DemandLastHour
• PulseOutput
  Heat,MassorVolumeTotal
• RelayOutputs
  Heat,MassorVolumeFlowRate,Total,Pressure,TemperatureAlarms,Peak
Demand,DemandLastHour
Applications:
Monitoringthethermalenergywhichcanbeextractedbyaheatexchangertakinginto
account the thermal energy remaining in the returned condensate. For simplication
it is assumed that the condensate (water) has a temperature which corresponds to
the temperature of saturated steam at the pressure measured upstream of the heat
exchanger.
STEAM NET HEAT
Net Heat Flow
NetHeatFlow=Volumeow•density(T,p)•[ED(T,p)–EW(TS(p))]
ED = Specicenthalpyofsteam
Ew = Specicenthalpyofwater
TS(p) = Calculatedcondensationtemperature
  (=saturatedsteamtemperatureforsupplypressure)
Calculations
Steam Net Heat
Illustration
FlowmeterTemperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Pressure
Transmitter
Water
Steam
*
* or Steam Trap Monitor

FC Flow Computer
14
3.4 Steam Delta Heat
Measurements:
Measuresactualvolumeowandpressureofthesaturatedsteaminthesupplypiping
as well as the temperature of the condensate in the downstream piping of a heat
exchanger.
Calculations:
• Calculatesdensity,massowaswellasthedeltaheatbetweenthesaturatedsteam
(supply)andcondensation(return)usingphysicalcharacteristictablesofsteamand
waterstoredintheowcomputer.
• With square law device measurement  the actual volume is calculated from the
differentialpressure,takingintoaccounttemperatureandpressurecompensation.
• Thesaturatedsteamtemperatureinthesupplylineiscalculatedfromthepressure
measuredthere.
Input Variables:
Supply: Flowandpressure(saturatedsteam)
Return: Temperature(condensate)
Output Results:
• DisplayResults
  Heat, Mass or Volume Flow Rate, Resettable Total, Non-Resettable Total,
Temperature, Pressure, Density (optional: peak demand, demand last hour,
time/datestamp)
• AnalogOutput
  Heat, Mass or Volume Flow Rate, Temperature, Pressure, Density, Peak
Demand,DemandLastHour
• PulseOutput
  Heat,MassorVolumeTotal
• RelayOutputs
  Heat,MassorVolumeFlowRate,Total,Pressure,TemperatureAlarms,Peak
Demand,DemandLastHour
Applications:
Calculatethesaturatedsteammassowandtheheatextractedbyaheatexchanger
takingintoaccountthethermalenergyremaininginthecondensate.
STEAM DELTA HEAT
Delta Heat Flow
NetHeatFlow=Volumeow•density(p)•[ED(p)–EW(T)]
ED = Specicenthalpyofsteam
Ew = Specicenthalpyofwater
Note:Assumesaclosedsystem.
Calculations
Steam Delta Heat
Illustration
Pressure
Transmitter Flowmeter
Temperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Water
Saturated
Steam

FC Flow Computer
15
3.5 Corrected Gas Volume
Measurements:
Aowmetermeasurestheactualvolumeowinagasline.Temperatureandpressure
sensorsareinstalledtocorrectforgasexpansioneffects.
Calculations:
• CorrectedVolumeiscalculatedusingtheow,temperatureandpressureinputsaswell
asthegascharacteristicsstoredintheowcomputer(see"FLUIDDATA"submenu).
Usethe"OTHERINPUT"submenutodenereferencetemperatureandreference
pressurevaluesforstandardconditions.
Output Results:
• DisplayResults
  CorrectedVolumeorActualVolumeFlowRate,ResettableTotal,Non-Resettable
Total,Temperature,Pressure,Density(optional:peakdemand,demandlasthour,
time/datestamp)
• AnalogOutput
  CorrectedVolumeorActualVolumeFlowRate,Temperature,Pressure,Density,
PeakDemand,DemandLastHour
• PulseOutput
  CorrectedVolumeorActualVolumeTotal
• RelayOutputs
  CorrectedVolumeorActualVolumeFlowRate,Total,pressure,Temperature
Alarms,PeakDemand,DemandLastHour
Applications:
Monitoringcorrectedvolumeowandtotalofanygas.Flowalarmsareprovidedviarelays
anddataloggingisavailableviaanalog(4-20mA)andserialoutputs.
CORRECTED
GAS VOLUME
Volume Flow
Pulse Input; Average K-Factor
   inputfrequency•timescalefactor
  VolumeFlow=
   K-Factor
Analog Input; Linear
  VolumeFlow=%input•FullScaleFlow
Corrected Volume Flow
  P TrefZ
ref
 CorrectedVolumeFlow=VolumeFlow• • •
 P
ref T Z
Calculations
Corrected
Gas Volume
Illustration
FlowmeterTemperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Pressure
Transmitter

FC Flow Computer
16
Temperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Pressure
Transmitter
Orifice Plate
with DP Transmitter
FlowmeterTemperature
Transmitter
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Pressure
Transmitter
3.6 Gas Mass
Measurements:
Aowmetermeasurestheactualvolumeowinagasline.Temperatureandpressure
sensorsareinstalledtomeasuretemperatureandpressure.
Calculations:
• Density and mass ow are calculated using gas characteristics stored in the ow
computer.
• With square law device measurement  the actual volume is calculated from the
differentialpressure,takingintoaccounttemperatureandpressurecompensation.
Output Results:
• DisplayResults
  MassorVolumeFlowRate,ResettableTotal,Non-ResettableTotal,Temperature,
Pressure,Density(optional:peakdemand,demandlasthour,time/datestamp)
• AnalogOutput
  Mass or Volume Flow Rate, Temperature, Pressure, Density, Peak Demand,
DemandLastHour
• PulseOutput
  MassorVolumeTotal
• RelayOutputs
  MassorVolumeFlowRate,Total,Pressure,Temperature,DensityAlarms,Peak
Demand,DemandLastHour
Applications:
Monitoringmassowandtotalofgas.Flowalarmsareprovidedviarelaysanddatalogging
isavailableviaanalog(4-20mA)andserialoutputs.
GAS MASS
Mass Flow
  P TrefZ
ref
 MassFlow=ActualVolumeFlow•ρref• • •
 P
ref T Z
ρref = Referencedensity
Tref = Referencetemperature
Pref = Referencepressure
Zref = ReferenceZ-factor
Calculations
Gas Mass
Illustration