Emerson 3051N manual Rerange with a Communicator Only

Page 21

Reference Manual

00809-0100-4808, Rev CA June 2008

Rosemount 3051N

FIGURE 2-5. Square Root Output Transition Point.

Full Scale Output
Full Scale Output		Full Scale
(mA dc)		Flow (%)
		Flow (%)

Sq. Root

Curve

Transition Point

Linear Section

Sq. Root Curve

Transition

Point

Slope=42

Slope=1

Rerange	The Range Values command sets the 4 and 20 mA points (lower and upper
	range values). Setting the range values to the limits of expected readings
	maximizes transmitter performance. In practice, you may reset the transmitter
	range values as often as necessary to reflect changing process conditions.
	You may use one of three methods to rerange the transmitter. Each method is
	unique; examine all three closely before deciding which method to use.

Rerange with a

Communicator Only

HART Comm.	1, 2, 3, 1, 1

Reranging using only the communicator changes the values of the analog 4 and 20 mA points independently without a pressure input.

NOTE

Changing the lower or upper range point results in similar changes to the span.

To rerange using only the communicator, enter the fast-key sequence above, select 1 Keypad input, and follow the on-line instructions. Or enter the values directly from the ONLINE screen.

2-9

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Contents Reference Manual Important Notice -- Errata Rosemount 3051N Return of Material Changes from June 2006 to June OldChanges Rosemount 3051N Table of Contents Installation TroubleshootingSpecifications Reference Data Options Appendix aHart Communicator Glossary Index Section Introduction Using this ManualRosemount 3051N Transmitter Functions Overview Safety MessagesAlarm Level Verification TransmitterSecurity Physical Removal Local Zero and Span Local Keys Configuring Transmitter Alarm and Security Jumper ProcedureElectronics Board Setting the Loop to Manual Wiring Diagrams Bench Hook-up Wiring Diagrams Field Hook-up Review Configuration Data Check OutputProcess Variables Basic Setup Sensor TemperatureSet Process Variable Units Set OutputRerange with a Communicator Only RerangeRerange with a Pressure Input Source and a Communicator Span and Zero Adjustment Buttons Diagnostics Service Detailed SetupTransmitter Test Loop TestCalibration Transmitter Bench Calibration Tasks Field Calibration Tasks Calibration Overview Configure the Analog Output ParametersURV Sensor TrimTypical Zero vs Non-zero-Based Application Illustrations Zero TrimDigital Trim Connection Drawing 4-20 mA Transmitters Full TrimRecall Factory Trim Recall Factory Trim- Sensor Trim Digital-to-Analog Trim Using Other ScaleRecall Factory Trim- Analog Output Analog Output TrimZero Effect HTc = URV + S URV Ps Rosemount 3051N Section Installation Rosemount 3051N Typical Installation Flowchart General Considerations Special Draft Range ConsiderationsMechanical Considerations 156 181 16 x 11/4 Bolts for Mounting to 54.1 Transmitter 120 127 66.8 Traditional Flange Option Code H2 Dimensional Drawing Mounting Rosemount 3051N GAS or Liquid Service GAS Service Steam Service Process Connections Housing Rotation Power SupplyElectrical Considerations Power Supply Load Limitations WiringAccess Requirements Cover Installation Grounding the Transmitter CaseEnvironmental Considerations Troubleshooting Returning Rosemount Products and Materials Symptom Corrective ActionsSeismic Nuclear SpecificationsModel Range Code Hydrostatic Test Pressure Ambient Temperature Effect12 Performance SpecificationsReference Accuracy DriftOverpressure Effect Static Pressure Effect Power Supply Effect Load Effect Mounting Position EffectRange Code Overpressure Effect Range Code Static Pressure Zero Effect1Service Functional SpecificationsTemperature Limits OutputSpan and Zero, Zero Elevation, Suppression Range Minimum Span Upper URL Lower LRLRange Code Minimum Time Constant Tc Including Dead Time Td Pressure12 Maximum WorkingStatic Pressure Limits Overpressure Limits Burst PressurePhysical Specifications Materials of Construction Option Code Description Add Ordering Information Housing Material Conduit Entry Size Configuration InformationMounting Bracket Options Meters optionalDate On Rosemount 3051N Exploded View with Coplanar Process Flange Rosemount 3051N Rosemount 3051N Section Options Overview Safety Messages LCD MeterCustom Meter Configuration Exploded View of the Rosemount 3051N with Optional LCD Meter Installing the MeterRosemount 3051N Error Diagnostic MessagesPress Limit Mounting Brackets OperationTransient Protection Terminal Block T1 Traditional Flange H2Transient Protection Terminal Block T1 Rosemount 3051N Appendix a Hart Communicator Introduction Safety MessagesRosemount 3051N Online Menu Function Hart Fast Key Sequence Connections and Hardware Figure A-3. Rosemount Hart terminal access doorFigure A-4. Bench Hook-up MA Transmitters Rosemount Communicator KeysAction Keys Function Keys Alphanumeric and Shift KeysData Entry Fast Key Sequence Conventions Fast Key Sequence Example Fast Key SequencesMenus Functions Main MenuOnline Menu Touch Multifunction LED Alphanumeric KeysTouch Screen Multifunction LED Processing IndicationRosemount 3051N Diagnostic Messages Fast Key Sequences Hot Key optionsMessage Description Rosemount 3051N Uploadvariable Rosemount 3051N Rosemount 3051N Glossary Smart Family Index 00809-0100-4808, Rev CA June Security Page ¢00809-0100-4801V¤