Emerson 3051N manual Recall Factory Trim Recall Factory Trim- Sensor Trim, Analog Output Trim

Page 31

Reference Manual

00809-0100-4808, Rev CA June 2008

Rosemount 3051N

Recall Factory Trim

Recall Factory Trim— Sensor Trim

HART Comm.

1, 2, 3, 4, 1

 

 

Recall Factory Trim— Analog Output

HART Comm.

1, 2, 3, 4, 2

 

 

Analog Output Trim

The Recall Factory Trim commands allow the restoration of the as-shipped factory settings of the sensor trim and analog output trim.

Resets the transmitter sensor trim to the as-shipped factory settings. The Recall Factory Trim—Sensor Trim command can be useful for recovering from an inadvertent zero trim of an absolute pressure unit.

Resets the transmitter analog output trim to the as-shipped

factory settings. The Recall Factory Trim—Analog Output Trim command can be useful for recovering from an inadvertent zero trim on an absolute pressure transmitter.

The Analog Output Trim commands allow you to adjust the transmitter’s current output at the 4 and 20 mA points to match the plant standards. This command adjusts the digital to analog signal conversion (see Figure 2-7).

Digital-to-Analog Trim

HART Comm.

1, 2, 3, 2, 1

 

 

Digital-to-Analog Trim Using Other Scale

HART Comm.

1, 2, 3, 2, 2

 

 

To perform a digital-to-analog trim with a HART Communicator, perform the following procedure.

1.From the ONLINE screen, select 1 Device setup, 2 Diag/Service,

3 Calibration, 2 Trim Analog Output, 1 Digital-to-Analog Trim. Select

OK after you set the control loop to manual (see “Setting the Loop to Manual” on page 2-5).

2.Connect an accurate reference ammeter to the transmitter at the CONNECT REFERENCE METER prompt. To do so, connect the positive lead to the positive terminal and the negative lead to the test terminal in the transmitter terminal compartment, or shunt the transmitter power through the reference meter at some point.

3.Select OK after connecting the reference meter.

4.Select OK at the SETTING FLD DEV OUTPUT TO 4 MA prompt. The transmitter outputs 4.00 mA.

5.Record the actual value from the reference meter, and enter it at the ENTER METER VALUE prompt. The communicator prompts you to verify whether or not the output value equals the value on the reference meter.

6.Select 1 Yes if the reference meter value equals the transmitter output value, or 2 No if it does not.

IF you select 1 Yes, THEN proceed to Step 7. IF you select 2 No, THEN repeat Step 5.

7.Select OK at the SETTING FLD DEV OUTPUT TO 20 MA prompt, and repeat Steps 5 and 6 until the reference meter value equals the transmitter output value.

8.Select OK after you return the control loop to automatic control.

The Scaled D/A Trim command matches the 4 and 20 mA points to a user-selectable reference scale other than 4 and 20 mA (1 to 5 volts if measuring across a 250 ohm load, or 0 to 100 percent if measuring from a DCS, for example). To perform a scaled D/A trim, connect an accurate reference meter to the transmitter and trim the output signal to scale as outlined in the Output Trim procedure.

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Contents Reference Manual Important Notice -- Errata Rosemount 3051N Return of Material Old Changes from June 2006 to JuneChanges Rosemount 3051N Table of Contents Troubleshooting InstallationSpecifications Reference Data Appendix a OptionsHart Communicator Glossary Index Section Introduction Using this ManualRosemount 3051N Transmitter Functions Overview Safety MessagesTransmitter Alarm Level VerificationSecurity 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 Check Output Review Configuration DataProcess Variables Set Output Sensor TemperatureBasic Setup Set Process Variable UnitsRerange with a Communicator Only RerangeRerange with a Pressure Input Source and a Communicator Span and Zero Adjustment Buttons Diagnostics Service Detailed SetupLoop Test Transmitter 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 TrimAnalog Output Trim Digital-to-Analog Trim Using Other ScaleRecall Factory Trim Recall Factory Trim- Sensor Trim Recall Factory Trim- Analog OutputZero Effect HTc = URV + S URV Ps Rosemount 3051N Section Installation Rosemount 3051N Typical Installation Flowchart Special Draft Range Considerations General 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 Power Supply Process Connections Housing RotationElectrical Considerations Power Supply Load Limitations WiringGrounding the Transmitter Case Access Requirements Cover InstallationEnvironmental Considerations Troubleshooting Returning Rosemount Products and Materials Symptom Corrective ActionsSeismic Nuclear SpecificationsModel Range Code Hydrostatic Test Pressure Drift Performance SpecificationsAmbient Temperature Effect12 Reference AccuracyRange Code Static Pressure Zero Effect1 Power Supply Effect Load Effect Mounting Position EffectOverpressure Effect Static Pressure Effect Range Code Overpressure EffectOutput Functional SpecificationsService Temperature LimitsRange Minimum Span Upper URL Lower LRL Span and Zero, Zero Elevation, SuppressionRange Code Minimum Time Constant Tc Including Dead Time Td Overpressure Limits Burst Pressure Maximum WorkingPressure12 Static Pressure LimitsPhysical Specifications Materials of Construction Option Code Description Add Ordering Information Meters optional Configuration InformationHousing Material Conduit Entry Size Mounting Bracket OptionsDate  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 Communicator Keys RosemountAction Keys Alphanumeric and Shift Keys Function KeysData Entry Main Menu Fast Key SequencesFast Key Sequence Conventions Fast Key Sequence Example Menus FunctionsOnline Menu Touch Multifunction LED Processing Indication Alphanumeric KeysMultifunction LED Touch ScreenRosemount 3051N Fast Key Sequences Hot Key options Diagnostic MessagesMessage Description Rosemount 3051N Uploadvariable Rosemount 3051N Rosemount 3051N Glossary Smart Family Index 00809-0100-4808, Rev CA June Security Page ¢00809-0100-4801V¤
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