Emerson 3051N manual Sensor Temperature, Basic Setup, Set Process Variable Units, Set Output

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Rosemount 3051N

Reference Manual

00809-0100-4808, Rev CA June 2008

NOTE

Regardless of the range points, the Rosemount 3051N will measure and report all readings within the digital limits of the sensor. For example, if the

4 and 20 mA points are set to 0 and 10 in H2O on a range code 1 Rosemount 3051N, and the transmitter detects a pressure of 25 inH2O, it digitally outputs the 25 inH2O reading and a 250% of span reading. However, there may be up to ±5.0% error associated with output outside of the range points.

Sensor Temperature

HART Comm.	1, 1, 4

The Rosemount 3051N contains a temperature sensor just above its pressure sensor in the sensor module. When reading this temperature, keep in mind that this is not a process temperature reading.

BASIC SETUP

Set Process Variable Units

HART Comm.	1, 3, 2

Set Output

HART Comm.	1, 3, 5

The PV Unit command sets the process variable units to allow you to monitor your process using the appropriate units of measure. Select from the following engineering units:

•	inH2O	•	bar
•	inHg	•	mbar
•	ftH2O	•	g/cm2
•	mmH2O	•	kg/cm2
•	mmHg	•	Pa
•	psi	•	kPa
•	torr	•	atm
• inH2O at 4 °C		• mmH2O at 4 °C

Activate the transmitter square root output option to make the analog output proportional to flow. As the input approaches zero, the Rosemount 3051N automatically switches to a linear output in order to ensure a more smooth, stable output near zero. See Figure 2-5.

The transition from linear to square root is not adjustable. It occurs at 0.8% of ranged pressure input or 8.9% of full-scale flow output.

From 0 percent to 0.6 percent of the ranged pressure input, the slope of the curve is unity (y = x). This allows accurate calibration near zero. Greater slopes would cause large changes in output for small changes at input. From

0.6percent to 0.8 percent, the slope of the curve equals 42 (y = 42x) to achieve continuous transition from linear to square root at the transition point.

2-8

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Contents Reference Manual Important Notice -- Errata Rosemount 3051N Return of Material Changes Changes from June 2006 to JuneOld Rosemount 3051N Table of Contents Specifications Reference Data InstallationTroubleshooting Hart Communicator OptionsAppendix a Glossary Index Using this Manual Section IntroductionRosemount 3051N Overview Safety Messages Transmitter FunctionsSecurity Alarm Level VerificationTransmitter Configuring Transmitter Alarm and Security Jumper Procedure Physical Removal Local Zero and Span Local KeysElectronics Board Setting the Loop to Manual Wiring Diagrams Bench Hook-up Wiring Diagrams Field Hook-up Process Variables Review Configuration DataCheck Output Sensor Temperature Basic SetupSet Process Variable Units Set OutputRerange Rerange with a Communicator OnlyRerange with a Pressure Input Source and a Communicator Span and Zero Adjustment Buttons Detailed Setup Diagnostics ServiceCalibration Transmitter TestLoop Test Transmitter Bench Calibration Tasks Field Calibration Tasks Configure the Analog Output Parameters Calibration OverviewSensor Trim URVZero Trim Typical Zero vs Non-zero-Based Application IllustrationsFull Trim Digital Trim Connection Drawing 4-20 mA TransmittersDigital-to-Analog Trim Using Other Scale Recall Factory Trim Recall Factory Trim- Sensor TrimRecall Factory Trim- Analog Output Analog Output TrimZero Effect HTc = URV + S URV Ps Rosemount 3051N Section Installation Rosemount 3051N Typical Installation Flowchart Mechanical Considerations General ConsiderationsSpecial Draft Range 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 Electrical Considerations Process Connections Housing RotationPower Supply Wiring Power Supply Load LimitationsEnvironmental Considerations Access Requirements Cover InstallationGrounding the Transmitter Case Troubleshooting Symptom Corrective Actions Returning Rosemount Products and MaterialsNuclear Specifications SeismicModel Range Code Hydrostatic Test Pressure Performance Specifications Ambient Temperature Effect12Reference Accuracy DriftPower Supply Effect Load Effect Mounting Position Effect Overpressure Effect Static Pressure EffectRange Code Overpressure Effect Range Code Static Pressure Zero Effect1Functional Specifications ServiceTemperature Limits OutputRange Code Minimum Time Constant Tc Including Dead Time Td Span and Zero, Zero Elevation, SuppressionRange Minimum Span Upper URL Lower LRL Maximum Working Pressure12Static Pressure Limits Overpressure Limits Burst PressurePhysical Specifications Materials of Construction Option Code Description Add Ordering Information Configuration Information Housing Material Conduit Entry SizeMounting Bracket Options Meters optionalDate On Rosemount 3051N Exploded View with Coplanar Process Flange Rosemount 3051N Rosemount 3051N Overview Safety Messages LCD Meter Section OptionsCustom Meter Configuration Installing the Meter Exploded View of the Rosemount 3051N with Optional LCD MeterRosemount 3051N Diagnostic Messages ErrorPress Limit Operation Mounting BracketsTraditional Flange H2 Transient Protection Terminal Block T1Transient Protection Terminal Block T1 Rosemount 3051N Introduction Safety Messages Appendix a Hart CommunicatorRosemount 3051N Online Menu Function Hart Fast Key Sequence Figure A-3. Rosemount Hart terminal access door Connections and HardwareFigure A-4. Bench Hook-up MA Transmitters Action Keys RosemountCommunicator Keys Data Entry Function KeysAlphanumeric and Shift Keys Fast Key Sequences Fast Key Sequence Conventions Fast Key Sequence ExampleMenus Functions Main MenuOnline Menu Touch Alphanumeric Keys Multifunction LEDTouch Screen Multifunction LED Processing IndicationRosemount 3051N Message Description Diagnostic MessagesFast Key Sequences Hot Key options Rosemount 3051N Uploadvariable Rosemount 3051N Rosemount 3051N Glossary Smart Family Index 00809-0100-4808, Rev CA June Security Page ¢00809-0100-4801V¤