High Precision Inventory Tank Gauging System

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LevelTemp AvgPre sureLevelTemp AvgPre sureValue EntryTank1Value Hi Lim Lo Lim H Lim LimAutoAutoAuto18. 0120.02.000.2 000Delay Hyst5.00.52. 080.00.020. 0 1. 0Leak LimitEnter CancelNew Tank0.2 0EnableTechnical DescriptionConnection to other systemsThe Saab TankRadar Rex system can be connectedto all major suppliers of DCS, SCADA systems,plant host computers or terminal automationsystems. The connnection can be made in two ways:• To a TankMaster PC workstation.• Directly to a Field Communication Unit.The advantage of connecting to a TankMasterworkstation is that not only the measured values,but also the values calculated by the TankMastercan be communicated.Examples of available protocols is given below.Certified test reports are available for most of theprotocols.If you require a protocol which is not included inthe list, contact Saab Rosemount as new protocolsare developed on a regular basis.FBMFCUTMFCUFBMMeasured data:Level, Temperature, Pressure, etc.Calculated data:Volume, Mass, Density, etc.Measured data:Level, Temperature, Pressure, etc.The host computer can be connected either to a TankMaster(TM) PCor directly to the FCU.Communication protocols (examples only, more are available)Vendor Unit Rex Unit InterfaceAllen-Bradley ® PLC-5 TankMaster RS-232 Data Highway PlusAllen Bradley ® PLC-5 (CSI) OPI RS-232/485 ModbusAllen Bradley ® PLC-5 (Wonderware) OPI RS-232/485 ModbusBailey ® B90 FCU RS-232/485 ModbusCSI ® Allan Bradley 1771 OPI RS-232 ModbusBasic ModuleDEC ® Not hardware OPI Ethernet Decmessage QdependentE+H ® MDP -11-1/F TankMaster RS-232 ModbusENRAF ® CIU OPI RS-232 ModbusENRAF ® Microlect FCU+PC RS-232 EnrafENRAF ® MODCIU FCU RS-232 ModbusENRAF ® MSU PC-ENTIS OPI RS-232 EF_CIU protocolFisher Controls ® CL6921 (Provox) FCU RS-232 ModbusFoxboro ® I/A Gateway (MDG) FCU RS-232/485 ModbusFoxboro ® I/A Gateway (MDG) OPI RS-232/485 ModbusHoneywell ® PLCG, APM-SI or CLM FCU RS-232/485 ModbusHoneywell ® APM-SI OPI EthernetHoneywell ® S-9000 OPI RS-232/485 ModbusIBM ® IBM9121 OPI SDLCRosemount ® RS 3 FCU RS-232/485 ModbusSiemens ® S5 FCU RS-232 ModbusVega ® Vegacom 556 OPI RS-232Yokogawa ® Centum-XL EFGW FCU RS-232/485 ModbusYokogawa ® Centum-CS FCU RS-232/485 Modbus(OPI is the previous generation HMI software.)32
Saab TankRadar RexTank inventory, density & hybrid calculationsThe TankRadar Rex gauge, with its high capacitysignal processor is designed to make basicinventory calculations directly in the gauge, or giveprecise inputs for complete tank calculations inanother computer. The gauge can receive andprocess signals from analog and digital pressuretransmitters, water bottom sensors etc. Timeconsuming manual density measurements can beavoided. All measured data are transmitted on thefield bus and can be further processed in the controlroom by the TankMaster PC software or by theplants host computer/DCS system.Density measurement with pressure transmittersWhen the RTG is connected with a pressuretransmitter near the bottom of the tank, the densityof the product can be calculated and presented online.The accuracy of the density calculation largelydepends on the accuracy of the pressure transmitter.Saab TankRadar Rex can interface to any pressuretransmitter with a standard output of 4-20 mA orHART. The 4-20 mA signal is converted fromanalog to digital form in the RTG.The standard pressure transmitter supplied withthe TankRadar Rex system for in-liquid mounting isRosemount 3051.The gauge calculates (or receives inputs for)the following data:•Gross volume using the tank strapping table(100 strapping points).• Mass (if pressure sensor connected)• Observed density (if pressure sensorconnected)• Level (corrected for thermal tank wallexpansion)•Temperature• Oil/Water interface level.•All data is calculated according to updatedAPI and ISO standards. The temperaturecalculations include API algorithms tohandle elements close to the bottom.• The level value is software corrected forchanges in tank reference height.Both metric and USA/UK units are supported.If net volume calculations with very high accuracyusing up to 2000 strapping points are required, theTankMaster PC software package is to be used, seepage 34. Normally less than 100 points per tank arenecessary for 1 liter accuracy. TankMaster is usingquadratic interpolation for spheres and horizontalcylinders, which increases volume accuracy andreduces number of strapping points.TankMasterField BusModemTRL/2 BusFieldCommunicationUnit• Level• Temperature• Density• Volume• MassRadar TankGaugeDataAcquisitionUnitTemperatureSensorsPressureSensorTo OtherFCU:sBy complementing the level measurement with temperature andpressure measurement, the density of the product in the tank can becontinuously calculated and provided on-line.33
Page 1 and 2: Technical DescriptionHigh Precision
Page 3 and 4: Saab TankRadar RexField Bus Modem F
Page 5 and 6: Saab TankRadar RexAbbreviations use
Page 7 and 8: Saab TankRadar RexSummary of functi
Page 9 and 10: W12FORINTRINSICALLYSAFE CIRCUITSONL
Page 11 and 12: Saab TankRadar RexSaab’s patented
Page 13 and 14: Saab TankRadar RexThe unit contains
Page 15 and 16: Saab TankRadar RexCable Connections
Page 17 and 18: Saab TankRadar RexHorn Antenna Gaug
Page 19 and 20: Saab TankRadar RexStill-Pipe Gauge
Page 21 and 22: ExSaab TankRadar RexTransmitterHead
Page 23 and 24: Saab TankRadar Rex1/2-in. BSP thred
Page 25 and 26: EEx ia II C T4Tamb = -40 °to +65°
Page 27 and 28: LevelmSaab TankRadar RexRemote Disp
Page 29 and 30: Saab TankRadar RexTechnical Data fo
Page 31: EEx ia II C T4Tamb = -40°to +65°C
Page 35 and 36: Saab TankRadar RexTankMaster HMI so
Page 37 and 38: Saab TankRadar RexOthers• User ma
Page 39 and 40: Saab TankRadar RexSaab TankRadar Re
Page 41 and 42: Saab TankRadar RexRedundant connect
Page 43 and 44: Saab TankRadar RexCertificatesThe l
Page 45 and 46: Saab TankRadar RexPatentsThis produ

High Precision Inventory Tank Gauging System

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