Rosemount 3051N

Reference Manual

00809-0100-4808, Rev CA June 2008

NOTE

Use a precision resistor for optimum accuracy. If you add a resistor to the loop, ensure that the power supply is sufficient to power the transmitter to a 20 mA output with the additional loop resistance.

Compensating Rosemount 3051N Range 4 and 5 Differential Transmitters for

Line Pressure

Rosemount 3051N Range 4 and Range 5 pressure transmitters require a special calibration procedure when used in differential pressure applications. The purpose of this procedure is to optimize transmitter performance by reducing the effect of static line pressure (Ps) in these applications. Rosemount 3051N differential pressure transmitter ranges 0, 1, 2, and 3 do not require this procedure because the optimization occurs in the sensor. See “Static Pressure Effect” on page 5-3for additional details.

Applying high static pressure to Rosemount 3051N Range 4 and Range 5 pressure transmitters causes a systematic shift in the output. This shift is linear with static pressure; correct it by performing the “Full Trim” on page 2-18,after determining the corrected input values as noted below.

The following specifications show the static pressure effect for Rosemount 3051N Range 4 and Range 5 transmitters used in differential pressure applications:

Zero Effect:

±0.1% of the upper range limit per 1000 psi (6,9 MPa) for line pressures (Ps) from 0 to 2000 psi (0 to 13,8 MPa)

±[0.2 + 0.2 (Ps-2000) / 1000]% of the upper range limit per 1000 psi (6,9 MPa) for line pressures above 2000 psi (13,8 MPa) and ≤ 3626 psi (25 MPa)

Span Effect:

Correctable to ±0.2% of reading per 1000 psi for line pressures from 0 to 3626 psi.

The systematic span shift caused by the application of static line pressure is –1.00% of input reading per 1000 psi for 3051N Range 4 transmitters, and –1.25% of reading per 1000 psi for Range 5 transmitters.

Use the following example to compute corrected input values.

Example

A Rosemount 3051ND4 transmitter will be used in a differential pressure application where the static line pressure is 1200 psi. The transmitter is ranged so that the output is 4 mA at 500 inH2O and 20 mA at 1500 inH2O.

To correct for systematic error caused by high static line pressure, first use the following formulas to determine corrected values for the low trim and high trim.

LTc = LRV + S (LRV) Ps

Where:

LTc =

Corrected Low Trim Value

 

LRV =

Lower Range Value

 

S =

–(Systematic Span shift per specification)

 

Ps =

Static Line Pressure

2-20

Page 31 Page 33
Page 32
Image 32
Emerson Process Management 3051N manual Zero Effect
Page 31 Page 33

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.
Top Page Image Contents