Temperature Transmitters Rosemount 248

1.meet common Single Point measurement application requirements 2.a head mount configuration . 3.a Rail Mount configurat

 Rosemount Temperature Transmitter 248

Supply Original Rosemount Transmitter

 

Rosemount 248HA - Headmount Temperature TransmitterIndustry standard DIN Form B headmount transmitter size enables mounting in any connection headReady-to-install out of the boxUnsurpassed performance for temperature monitoring pointsReliable EMC performance meets NAMUR NE21 recommendationCommunicates using open 4–20 mA/HART ProtocolA 248C PC-based HART configuration interface is available

Rosemount 248RA - Railmount Temperature TransmitterNew compact DIN railmount styleReady-to-install out of the boxUnsurpassed performance for temperature monitoring pointsReliable EMC performance meets NAMUR NE21 recommendationCommunicates using open 4–20 mA/HART ProtocolA 248C PC-based HART configuration interface is available

Rosemount 248C - Configuration Interface Options for the 248 SeriesThe 248C PC-based configuration software for the Rosemount 248 allows comprehensive configuration of the transmitters. Used in conjunction with various Rosemount or user-supplied hardware modems, the software provides the tools necessary to configure the 248 transmitters including the following parameters:Process VariableSensor TypeNumber of WiresEngineering UnitsTransmitter Tag InformationDampingAlarming Parameters

FUNCTIONAL SPECIFICATIONS

InputsUser-selectable; sensor terminals rates to 42.4 V dc. SeeTransmitter Accuracy and Ambient Temperature Effects onpage 4 for sensor options.

Output2-wire 420 mA, linear with temperature or input; digital outputsignal superimposed on 420 mA signal, available for a HARTcommunicator or control system interface.IsolationInput/output isolation tested to 500 V ac rms (707 V dc) at 50/60Hz.Power SupplyAn external power supply is required for HART devices. Thetransmitter operates on 12.0 to 42.4 VDC transmitter terminalvoltage with load resistance between 250 and 1100 ohms. Aminimum of 17.75 VDC power supply is required with a load of 250ohms. Transmitter power terminals are rated to 42.4 V DC.Humidity Limits099% relative humidity, non-condensingNAMUR RecommendationsThe 248 meets the following NAMUR recommendations:NE 21 Electromagnetic compatibility (EMC) for Process andLaboratory ApparatusNE 43 Standard of the signal level breakdown information ofdigital transmittersNE 89 Standard of temperature transmitters with digitalsignal processingTransient ProtectionThe optional Rosemount 470 Transient Protector preventsdamage from transients induced by lightning, welding, heavyelectrical equipment, or switch gears. Refer to the 470 ProductData Sheet (document number 00813-0100-4191) formore information.Temperature LimitsOperating Limit40 to 85 °C (40 to 185 °F)Storage Limit50 to 120 °C (58 to 248 °F)Turn-on TimePerformance within specifications in less than 5.0 seconds afterpower is applied to transmitter, when damping value is set to zeroseconds.Update RateLess than 0.5 secondsDamping32 seconds maximum. 5 seconds defaultCustom Alarm and Saturation LevelsCustom factory configuration of alarm and saturation levels isavailable with option code C1 for valid values. These values canalso be configured in the field using a HART Communicator.Recommended Minimum Measuring Span10 KSoftware Detected Failure ModeThe values at which the transmitter drives its output in failuremode depends on whether it is configured to standard, custom, orNAMUR-compliant (NAMUR recommendation NE 43) operation.The values for standard and NAMUR-compliant operation are asfollows:Certain hardware failures, such as microprocessor failures, willalways drive the output to greater than 23 mA.

PHYSICAL SPECIFICATIONSHART Communicator ConnectionsCommunication Terminal: Clips permanently fixed to the terminalsMaterials of ConstructionElectronics HousingNoryl® glass reinforcedUniversal (option code U and H) and Rosemount® Connection(option code A and G) HeadsHousing: Low-copper aluminum (option codes U and A)Stainless Steel (option codes G and H)Paint: PolyurethaneCover O-Ring: BunaNBUZ Head (option code B)Housing: AluminumPaint: Aluminum lacquerO-Ring Seal: Rubber