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.

2-19

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Emerson Process Management 3051N Recall Factory Trim Recall Factory Trim- Sensor Trim, Recall Factory Trim- Analog Output
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3051N specifications

The Emerson Process Management 3051N is a state-of-the-art pressure transmitter that exemplifies precision and reliability in process automation. Designed for a wide range of industrial applications, the 3051N is celebrated for its advanced features, innovative technologies, and robust construction, catering to the evolving needs of process industries.

One of the standout features of the 3051N is its exceptional accuracy. With a standard accuracy rating of ±0.075% of span, it ensures precise pressure measurements, critical for maintaining optimal process conditions. This high level of accuracy makes it suitable for applications in industries such as oil and gas, chemicals, and water treatment, where even minor deviations can lead to significant operational issues.

The 3051N employs Smart Pressure Technology, integrating digital communication capabilities with traditional analog systems. This technology allows for seamless interoperability with existing process control systems, providing users with vital data for diagnostics, calibration, and configuration via HART, FOUNDATION fieldbus, or Profibus protocols. These capabilities lead to enhanced process efficiency and reduced downtime due to effective predictive maintenance.

Another notable characteristic of this transmitter is its robust design. The 3051N is built to endure harsh industrial environments, with a rugged housing that is resistant to corrosive and hazardous conditions. Its wide operating temperature range, typically from -40°C to 85°C, coupled with various diaphragm materials, ensures that it can function effectively across diverse applications.

Moreover, the Emerson 3051N incorporates advanced predictive diagnostics, enabling users to monitor the health of the transmitter continuously. This feature alerts operators to potential issues before they escalate, facilitating proactive maintenance strategies that can significantly lower operational costs.

The flexible configuration options offered by the 3051N also enhance its usability. Users can select from a variety of pressure ranges, process connection types, and electrical connections, making it easy to customize the transmitter to fit specific application needs.

In conclusion, the Emerson Process Management 3051N pressure transmitter is a versatile and highly efficient device that integrates advanced technology with robust design and exceptional accuracy. Its ability to adapt to various industrial demands while providing predictive diagnostics makes it a preferred choice for professionals seeking reliability and precision in process management.
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