Emerson Rosemount 3051CFC Flow Meter

Emerson Rosemount 3051CFC Flow Meter

Introduction

The Rosemount™ 3051CFC Compact Annubar™ Flow Meter represents a significant advancement in differential pressure flow measurement technology, combining the field-proven Emerson Rosemount 3051C pressure transmitter platform with a compact averaging pitot tube design. This integrated solution is engineered for line sizes up to 12 inches (300 mm) and performs reliably across liquid, gas, and steam applications under demanding process conditions.-4

Factory leak-tested and calibrated as a complete assembly, the Rosemount 3051CFC Compact Annubar Flow Meter reduces potential leak points while simplifying installation. The patented T-shaped sensor features a flat upstream surface that creates a fixed separation point, enabling high performance across a wide flow range while positioning the stagnation zone to reduce noise and prevent particulate clogging.

Key Technical Specifications

Performance Specifications

The reference manual indicates that Range 1 flowmeters may experience an additional uncertainty up to 0.9%; consult Emerson documentation for exact specifications when operating at Range 1 conditions.-1

Functional Specifications

Electrical and Power Specifications

For 4-20 mA HART output (output code A), the Rosemount 3051CFC operates on an external power supply of 10.5 to 55 Vdc with no load. Communication requires a minimum loop resistance of 250 Ω. Maximum loop resistance follows the formula: Max. Loop Resistance = 43.5 × (Power Supply Voltage – 10.5) .-1

For FOUNDATION Fieldbus (output code F) and PROFIBUS PA (output code W) configurations, transmitters operate on 9.0 to 32.0 Vdc terminal voltage with a current draw of 17.5 mA for all configurations including the LCD display option.-1

Wireless Specifications (WirelessHART®)

Certifications and Approvals

SIL 2/3 certified to IEC 61508 by independent third party

NACE® MR0175/ISO 15156 and MR0103 materials conformance

Hazardous location approvals (multiple classifications including Explosion-proof, Flameproof, Intrinsically Safe)

Pressure rating up to ANSI 600# (PN 100)

Warranty

Up to 5-year limited warranty

Rosemount 3051CFC Model Number Breakdown and Ordering Information

The Rosemount 3051CFC Compact Annubar Flow Meter utilizes a comprehensive model code system for precise configuration. Below is a detailed breakdown with complete model number examples.

Model Code Structure

3051CFC — Compact Annubar Flow Meter

Typical model number: 3051CFCDC S 060 N 065 0 3 2 A A 1 WC E5 M5 -44

This model number decodes as follows:

3051CFC — Base model: Compact Annubar Flow Meter

D — Measurement type: Differential Pressure

C — Fluid type / configuration variant

S — Primary element type

060 — Line size: 6 inches (150 mm)

N — Material code

065 — Additional specification

0 3 2 — Sensor and range configuration

A A 1 — Output and housing options

WC — Communication protocol

E5 M5 — Approvals and display options

Complete Model Number Examples

3051CFCDC8040N065072A — Compact orifice flow meter configuration with 4-inch line size and HART output-51

3051CFCDCS060N065032AA1WCE5M5 — Differential pressure, 6-inch line size, Annubar primary element, HART output, aluminum housing

3051CFCACL040 — Annubar configuration, 4-inch line size, liquid service

3051CFCACS060 — Annubar configuration, 6-inch line size, steam service

3051CFCACG080 — Annubar configuration, 8-inch line size, gas service

3051CFCCCL050 — Conditioning orifice configuration, 5-inch line size, liquid service

3051CFCACS020 — Annubar configuration, 2-inch line size, steam service

3051CFCCCG100 — Conditioning orifice configuration, 10-inch line size, gas service

3051CFCACL120 — Annubar configuration, 12-inch line size, liquid service

3051CFCACS040 — Annubar configuration, 4-inch line size, steam service

3051CFCCCL080 — Conditioning orifice configuration, 8-inch line size, liquid service

3051CFCACG060 — Annubar configuration, 6-inch line size, gas service

3051CFCCCG040 — Conditioning orifice configuration, 4-inch line size, gas service

3051CFCACL100 — Annubar configuration, 10-inch line size, liquid service

3051CFCACS120 — Annubar configuration, 12-inch line size, steam service

3051CFCCCL020 — Conditioning orifice configuration, 2-inch line size, liquid service

Ordering Code Reference

For 10-inch and 12-inch line sizes, an alignment ring must be ordered separately as an installation accessory.-44

Key Features and Technical Advantages

Compact Annubar Sensor Design

The Rosemount 3051CFC incorporates the same patented T-shaped averaging pitot tube technology found in larger Annubar systems. The flat upstream surface creates a fixed separation point, while the stagnation zone reduces flow-induced noise, minimizes measurement inaccuracies, and prevents particulate accumulation. The sensor maintains a small profile in the pipe for reduced permanent pressure loss and lower energy consumption.-32-52

Factory-Integrated Assembly

Complete flow assemblies arrive leak-tested and calibrated, reducing potential leak points by up to 70% compared to field-assembled alternatives. The design mounts directly between existing raised-face flanges, eliminating the need for fittings, impulse tubing, valves, adapters, and manifolds.-11-4

Advanced Diagnostic Capabilities

The Rosemount 3051CFC includes multiple diagnostic functions:

Loop Integrity Diagnostics — Proactively detects degraded electrical loop integrity issues (option code DA0)

Plugged Impulse Line Diagnostics — Identifies impulse piping blockages before they impact process quality

Process Alerts — Monitors abnormal process conditions for increased safety

Power Advisory — Provides advanced electrical loop monitoring

Bluetooth® Wireless Connectivity

Select configurations feature Bluetooth wireless connectivity, enabling maintenance and configuration tasks without physical connection or separate configuration tools.-4

Graphical Back-Lit Display

The graphical, back-lit display supports eight different languages and remains readable in all lighting conditions. The Local Operator Interface (option code M4) offers straightforward menus and built-in configuration buttons for streamlined commissioning.-4-49

Multi-Protocol Communication Support

Application-Specific Configuration

Application-specific configuration transforms the pressure transmitter into a flow meter with totalizer functionality, enabling real-time flow accumulation without external computation.

Installation Considerations

Line Size Compatibility

The Rosemount 3051CFC Compact Annubar Flow Meter is available for line sizes from 2 to 8 inches (50 to 200 mm) when configured with Annubar primary element technology.-5

For conditioning orifice plate configurations, line sizes range from 0.5 to 12 inches (15 to 300 mm).-12

Straight Pipe Requirements

When utilizing conditioning orifice plate technology, the Rosemount 3051CFC requires only two pipe diameters upstream from an upstream disturbance (double elbows, valves, reducers), delivering ±0.5% accuracy with the 405C Conditioning Compact Orifice.-11

For standard Annubar installations without conditioning orifice technology, consult factory recommendations for specific straight pipe requirements based on upstream piping configuration.

Mounting Between Existing Flanges

The Rosemount 3051CFC installs directly between any existing raised-face flanges. A self-centering ring ensures optimal accuracy while simplifying the installation process. The compact form factor requires no additional pipe penetrations beyond the flange mounting location.-11

Sensor Sizing

Proper sensor sizing is determined based on probe width relative to pipe diameter. For Annubar configurations, the Rosemount 3051CFC Compact Annubar Flow Meter is available with sensor sizes appropriate to the specified line size.

Applications

The Rosemount 3051CFC Compact Annubar Flow Meter is suitable for a wide range of industrial applications:

Oil and Gas Production — Wellhead flow measurement, separator monitoring

Refining — Process flow monitoring, utility distribution

Petrochemical — Chemical injection, reactor feed measurement

Power Generation — Boiler feedwater, steam flow, cooling water

Pulp and Paper — Process water, chemical dosing, steam distribution

Utilities — Compressed air, natural gas, steam metering

HVAC — Chilled water, hot water, air handling systems

Comparison: Rosemount 3051CFC vs. 3051CFA

Safety Certifications

The Rosemount 3051CFC Compact Annubar Flow Meter is SIL 2/3 certified to IEC 61508 by an independent third party. Prior-use certificates of FMEDA data are available for safety instrumented function (SIF) installations. Hazardous location approvals are available for multiple classifications including Explosion-proof, Flameproof, and Intrinsically Safe (I.S.) installations