Emerson 3051N manual Setting the Loop to Manual Wiring Diagrams Bench Hook-up

Page 17

Reference Manual

00809-0100-4808, Rev CA June 2008

Rosemount 3051N

Setting the Loop to Manual

Wiring Diagrams (Bench Hook-up)

FIGURE 2-3. Bench Hook-up (4–20 mA Transmitters).

To commission on the bench, connect the transmitter and the communicator as shown in Figure 2-3.Make sure the instruments in the loop are installed in accordance with intrinsically safe or nonincendive field wiring practices before connecting a communicator in an explosive atmosphere. Connect the communicator leads at any termination point in the signal loop. It is most convenient to connect them to the terminals labeled “COMM” on the terminal block. Connecting across the “TEST” terminals will prevent successful communication. To avoid exposing the transmitter electronics to the plant environment after installation, set all transmitter jumpers during the commissioning stage on the bench.

For 4–20 mA transmitters, you will need a power supply capable of providing

10.5to 55 V dc at the transmitter, and a meter to measure output current. To enable communication, a resistance of at least 250 ohms, but within the transmitter load limitations (see Figure 3-7“Power Supply Load Limitations.” in Section 3) must be present between the communicator loop connection and the power supply. Do not use inductive-based transient protectors with the Rosemount 3051N.

Whenever you are preparing to send or request data that would disrupt the loop or change the output of the transmitter, you must set your process application loop to manual. The HART Communicator will prompt you to set the loop to manual when necessary. Keep in mind that acknowledging this prompt does not set the loop to manual. The prompt is only a reminder; you have to set the loop to manual yourself as a separate operation.

Connect the bench equipment as shown in Figure 2-3and turn on the HART-based Communicator by pressing the ON/OFF key. The communicator will search for a HART-compatible device and will indicate when the connection is made. If the communicator fails to connect, it will indicate that no device was found. If this occurs, refer to Section 4: Troubleshooting.

Current	24 V dc
Current	Supply
Meter
	RL≥250Ω

See “Safety Messages” on page 2-1for warning information.

2-5

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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 Section Introduction Using this ManualRosemount 3051N Transmitter Functions Overview Safety MessagesSecurity Alarm Level VerificationTransmitter 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 Process Variables Review Configuration DataCheck Output 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 SetupCalibration Transmitter TestLoop Test 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 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 Power Supply Load Limitations WiringEnvironmental Considerations Access Requirements Cover InstallationGrounding the Transmitter Case 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 OutputRange Code Minimum Time Constant Tc Including Dead Time Td Span and Zero, Zero Elevation, SuppressionRange Minimum Span Upper URL Lower LRL 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 Action Keys RosemountCommunicator Keys Data Entry Function KeysAlphanumeric and Shift Keys 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 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¤