Overview of the Rosemount 3051C Pressure Transmitter
The Rosemount 3051C is a high-performance pressure transmitter designed for precise measurement in various industrial applications. It offers advanced features like capacitance sensor technology and a coplanar design, ensuring accuracy and durability in harsh environments. Suitable for differential, gage, and absolute pressure measurements, it supports HART and Fieldbus protocols for seamless communication. Its robust construction and high-temperature capabilities make it ideal for oil, gas, and chemical industries.
The Rosemount 3051C series is a family of smart pressure transmitters renowned for their precision, reliability, and versatility in industrial applications. Designed to measure differential, gage, and absolute pressure, these transmitters utilize advanced capacitance sensor technology for accurate and stable performance. The series is part of Emerson’s Rosemount portfolio, which has a long-standing reputation for delivering high-quality measurement solutions. With a robust coplanar design, the 3051C series offers enhanced durability and resistance to harsh environmental conditions. It supports various communication protocols, including HART and Fieldbus, making it compatible with modern process control systems. Widely used in oil, gas, chemical, and power industries, the Rosemount 3051C series is a trusted choice for critical pressure measurement needs.
1.2 Key Features and Benefits
The Rosemount 3051C series offers a range of advanced features that enhance performance and reliability in industrial pressure measurement. Its coplanar design ensures a compact and durable structure, while the capacitance sensor technology provides high accuracy and stability. The transmitter supports multiple pressure types, including differential, gage, and absolute, making it versatile for various applications. High pressure and temperature ratings allow it to operate effectively in extreme conditions. Additionally, the 3051C supports HART and Fieldbus communication protocols, enabling seamless integration with modern control systems. These features, combined with its robust construction, make the Rosemount 3051C a reliable and flexible solution for precise pressure measurement in demanding environments.
1;3 Applications and Industries
The Rosemount 3051C pressure transmitter is widely used across various industries due to its versatility and reliability. It is commonly employed in oil and gas production, chemical processing, and power generation, where accurate pressure measurement is critical. Additionally, it finds applications in water and wastewater treatment, food and beverage processing, and pharmaceutical manufacturing. The transmitter’s ability to handle high temperatures and pressures makes it suitable for extreme environments, such as in high-temperature reactors or steam systems. Its compatibility with different communication protocols also makes it ideal for integration into modern industrial control systems, ensuring efficient monitoring and control of processes in these sectors.

Features of the Rosemount 3051C
The Rosemount 3051C features a coplanar design, capacitance sensor technology, and supports differential, gage, and absolute pressure measurements; It offers high pressure and temperature ratings, ensuring reliability in harsh environments while providing accurate and stable performance across various industrial applications.
2.1 Coplanar Design and Its Advantages
The Rosemount 3051C features a coplanar design, which integrates the sensor and process flange on the same plane, eliminating the need for capillaries and fill fluid. This design simplifies installation, reduces potential leak points, and minimizes space requirements. The coplanar flange ensures direct mounting, improving alignment and reducing the risk of measurement errors. Constructed with durable SST materials, it offers enhanced resistance to corrosion and harsh environments. This design is particularly advantageous in applications requiring high accuracy and reliability, such as oil, gas, and chemical processing. The coplanar design also supports easier maintenance and troubleshooting, making it a preferred choice for industrial pressure measurement solutions.

2.2 Capacitance Sensor Technology
The Rosemount 3051C employs advanced capacitance sensor technology, providing high accuracy and stability in pressure measurement. This technology utilizes a capacitive sensing element that detects changes in capacitance proportional to pressure variations, ensuring precise and reliable readings. The sensor’s design minimizes drift and hysteresis, delivering consistent performance over time. It supports differential, gage, and absolute pressure measurements, with ranges up to 2000 psi (137.9 bar) for differential and gage pressures, and 4000 psia (275;8 bar) for absolute pressure. This technology is robust, resistant to vibration, and suitable for harsh industrial environments, making it ideal for applications in oil, gas, and chemical processing where accuracy and durability are critical.
2.3 Pressure Measurement Capabilities (Differential, Gage, Absolute)
The Rosemount 3051C offers versatile pressure measurement capabilities, supporting differential, gage, and absolute pressure types. It measures differential pressure up to 2000 psi (137.9 bar) and gage pressure up to 2000 psi (137.9 bar), while absolute pressure is measured up to 4000 psia (275.8 bar). This versatility makes it suitable for a wide range of industrial applications, including oil, gas, and chemical processing. The transmitter’s advanced sensor technology ensures high accuracy and reliability across all measurement types, providing precise readings in demanding environments. Its ability to handle multiple pressure types in a single device simplifies installation and reduces the need for additional equipment, making it a cost-effective solution for various industrial needs.

2.4 High Pressure and Temperature Ratings
The Rosemount 3051C is designed to handle high pressure and temperature conditions, making it suitable for demanding industrial environments. It offers a maximum pressure rating of 2000 psi (137.9 bar) for differential and gage pressure measurements, and up to 4000 psia (275.8 bar) for absolute pressure. The transmitter can operate in high-temperature environments, with some models capable of withstanding up to 375°F (191°C) without requiring remote diaphragm seals or capillaries. This robust design ensures reliable performance in harsh conditions, such as those found in oil, gas, and petrochemical applications. Its durability and wide operating range make it a reliable choice for industries requiring precise pressure measurement in extreme conditions.

Installation and Setup
Ensure proper installation by following pre-installation checks, step-by-step guides, and wiring instructions. Mount the transmitter correctly, aligning it for accurate measurement and reliable performance in industrial settings.
3.1 Pre-Installation Considerations
Before installing the Rosemount 3051C, ensure the transmitter is suitable for the application by reviewing its specifications. Verify the pressure and temperature ratings match the process conditions. Check the compatibility of the transmitter with the system’s communication protocols, such as HART or Fieldbus. Ensure the correct model is selected for the type of pressure measurement required (differential, gage, or absolute). Review the wiring and electrical connections to confirm they meet the installation requirements. Proper grounding and shielding are essential to prevent interference. Familiarize yourself with the installation manual to understand safety precautions and guidelines. Finally, prepare all necessary tools and accessories for a smooth installation process.
3.2 Step-by-Step Installation Guide
Begin by unpacking and inspecting the Rosemount 3051C transmitter for any damage. Mount the transmitter in a location that ensures proper venting and protection from harsh environmental conditions. Secure the transmitter to a sturdy surface using the provided mounting hardware. Connect the pressure ports to the process lines, ensuring correct orientation and tightness. Next, connect the electrical wires according to the wiring diagram in the manual, paying attention to the correct terminals for power and signal. Configure the transmitter settings using the HART communicator or Fieldbus interface, setting the zero and span as required. Finally, test the transmitter to ensure accurate measurements and proper communication with the control system. Refer to the manual for detailed instructions and safety precautions.
3.3 Wiring and Electrical Connections
When wiring the Rosemount 3051C, refer to the manual for the correct wiring diagram. Ensure all connections are secure and match the terminal designations. Connect the power supply to the appropriate terminals, typically 10-32 VDC for HART models. Signal wires should be connected to the output terminals, ensuring proper shielding to minimize interference. For HART protocol, use twisted-pair cables for communication. Verify that all electrical connections are tight and insulated to prevent moisture ingress. Follow proper grounding procedures to avoid noise and ensure accurate measurements. Always disconnect power before performing any wiring changes. Adhere to safety guidelines and industry standards for electrical installations to maintain system integrity and performance.
3.4 Mounting and Alignment
Proper mounting and alignment are critical for accurate measurements with the Rosemount 3051C. Ensure the transmitter is installed on a level and plumb surface to maintain measurement accuracy. Use the provided mounting hardware, such as brackets or flanges, to secure the device firmly. Align the transmitter with the process connection to avoid mechanical stress or misalignment. For coplanar models, ensure the flange is correctly oriented to match the process piping. Verify that the transmitter is properly seated and tightened according to the torque specifications in the manual. Misalignment can lead to measurement errors, so double-check the installation. Always refer to the manual for specific mounting recommendations and torque values to ensure optimal performance and reliability.

Configuration and Calibration
Configuration and calibration of the Rosemount 3051C ensure precise measurements. Use HART or Fieldbus protocols for setup, adjusting zero and span settings. Follow manual guidelines for accuracy.
4.1 Commissioning the Transmitter
Commissioning the Rosemount 3051C involves initializing the transmitter for operation. Begin by installing the device according to manual guidelines, ensuring proper wiring and electrical connections. Configure communication settings via HART or Fieldbus protocols, depending on your system requirements. For FOUNDATION Fieldbus transmitters, set the calibrated range as specified in the manual. Perform a final check to ensure all parameters align with process conditions. Refer to the manual for detailed commissioning steps to guarantee accurate measurements and reliable performance. Proper commissioning ensures optimal functionality and integration with existing control systems.
4.2 Zero and Span Calibration
Zero and span calibration are critical for ensuring the Rosemount 3051C transmitter operates accurately. Zero calibration sets the transmitter’s output to 4mA at the lower end of the measurement range, typically atmospheric pressure for gage or zero differential pressure. Span calibration adjusts the output to 20mA at the upper end of the range; Use HART or Fieldbus communication to perform these adjustments, following the manual’s specific instructions. For zero-based spans, reference conditions and silicone oil fill must be considered. Proper calibration ensures precise measurements and reliable performance. Always refer to the manual for detailed calibration procedures to maintain accuracy and system integrity.
4.3 HART Protocol Configuration
The Rosemount 3051C supports HART protocol for advanced communication and configuration. Using HART, users can configure transmitter parameters, perform calibration, and access diagnostic data. The HART protocol enables seamless integration with control systems, allowing for remote configuration and monitoring. To configure the HART settings, use a HART handheld communicator or HART-compatible software. The manual provides detailed instructions for setting up HART communication, including configuring device-specific parameters and troubleshooting common issues. Proper HART configuration ensures optimal performance and compatibility with existing control systems. Refer to the manual for step-by-step guidance on HART protocol setup and utilization.
4.4 Fieldbus Communication Setup
The Rosemount 3051C supports Fieldbus communication for advanced process control and integration. For PROFIBUS PA compatibility, the Transducer Block (TB) is required, enabling seamless communication in fieldbus networks. The manual provides detailed instructions for configuring Fieldbus parameters, including device identification, process variables, and diagnostic data. Ensure the transmitter is properly connected to the Fieldbus network and configured using appropriate software tools. Refer to the manual for step-by-step guidance on setting up Fieldbus communication, troubleshooting common issues, and optimizing performance. Proper configuration ensures reliable data transmission and integration with control systems, enhancing overall process efficiency and monitoring capabilities.

Models and Variants
The Rosemount 3051C series includes variants like the 3051CD for differential pressure, 3051CG for gage pressure, 3051CF as a flow meter, and 3051T for high-temperature applications.
5.1 Rosemount 3051CD Differential Pressure Transmitter
The Rosemount 3051CD is a differential pressure transmitter designed for precise measurement in industrial applications. It utilizes advanced capacitance sensor technology and a coplanar design for accuracy and reliability. Capable of measuring differential pressure up to 2000 psi (137.9 bar), it is ideal for applications in oil and gas, chemical processing, and power generation; The transmitter supports HART protocol for smart communication and is compatible with Fieldbus systems for seamless integration into process control systems. Its robust construction ensures durability in harsh environments, making it a reliable choice for demanding industrial conditions. The 3051CD is part of the Rosemount 3051C family, known for its high performance and versatility.
5.2 Rosemount 3051CG Gage Pressure Transmitter
The Rosemount 3051CG is a gage pressure transmitter designed for accurate pressure measurement in industrial applications. It offers a range of up to 2000 psi (137.9 bar) and utilizes advanced capacitance sensor technology for reliable performance. The coplanar design ensures durability and resistance to harsh environments, making it suitable for oil and gas, chemical processing, and power generation industries. The transmitter supports HART protocol for smart communication, enabling seamless integration into process control systems. Its high accuracy and robust construction make it a trusted solution for gage pressure measurement. The 3051CG is part of the Rosemount 3051C family, known for its versatility and high-performance capabilities in demanding industrial conditions.
5.3 Rosemount 3051CF Series Flow Meter
The Rosemount 3051CF Series Flow Meter is a versatile solution for accurate flow measurement in industrial applications. Designed as part of the 3051C family, it integrates seamlessly with the platform’s advanced features, including capacitance sensor technology and HART communication. The flow meter is optimized for high-performance flow measurement, offering reliability and precision in demanding environments. It supports various process control systems and is compatible with Fieldbus protocols, ensuring flexible integration. The 3051CF Series is ideal for industries requiring precise flow monitoring, such as oil and gas, water treatment, and chemical processing. Its robust design and advanced diagnostics make it a reliable choice for maintaining process efficiency and accuracy in flow measurement applications.
5.4 Rosemount 3051T High-Temperature Transmitter
The Rosemount 3051T High-Temperature Transmitter is designed for applications requiring high process temperature capability, up to 375°F (191°C). It measures differential or gage pressure without the need for remote diaphragm seals or capillaries, ensuring reliable performance in extreme conditions. Built on the 3051C platform, it leverages advanced features like capacitance sensor technology and HART communication for precise measurements. The 3051T is ideal for industries such as oil and gas, chemical processing, and power generation, where high-temperature environments are common. Its robust design and compatibility with existing 3051C configurations make it a seamless integration into process control systems. Refer to the Rosemount 3051 manual for detailed specifications and installation guidelines.

Maintenance and Troubleshooting
Regular maintenance ensures optimal performance. Perform routine checks, clean sensors, and verify electrical connections. Address common issues like calibration drift or wiring faults promptly. Use diagnostic tools like HART or Fieldbus for troubleshooting. Consult the Rosemount 3051C manual for detailed repair procedures and guidelines to resolve operational problems effectively.
6.1 Routine Maintenance Tasks
Regular maintenance is crucial for ensuring the Rosemount 3051C operates efficiently. Start by inspecting electrical connections for tightness and integrity. Clean the sensor and housing to prevent contamination. Check the zero and span calibration periodically to maintain accuracy. Refer to the manual for specific calibration procedures. Additionally, verify that all gaskets and seals are in good condition to prevent leaks. Use diagnostic tools like HART or Fieldbus communication to monitor the transmitter’s health and address potential issues early. Always follow the manufacturer’s guidelines to avoid damage or performance degradation. Routine maintenance helps extend the lifespan of the transmitter and ensures reliable pressure measurements in industrial applications.
6.2 Common Issues and Solutions
Common issues with the Rosemount 3051C include calibration drift, electrical connection problems, and sensor contamination. For calibration drift, perform zero and span adjustments as outlined in the manual. Loose or corroded connections can cause inaccurate readings; ensure all wiring is secure and clean. Sensor contamination from dirt or moisture can be resolved by cleaning the sensor and ensuring proper sealing. If communication issues arise via HART or Fieldbus, check the configuration settings and ensure compatibility with your control system. Refer to the troubleshooting section in the manual for detailed diagnostic procedures. Addressing these issues promptly ensures optimal performance and accuracy in pressure measurement applications.
6.3 Diagnostic Techniques
Diagnosing issues with the Rosemount 3051C involves using advanced tools and methods. Utilize the HART protocol or Fieldbus communication to access detailed diagnostic data, such as sensor health and calibration status. Perform regular checks on wiring and connections to ensure integrity. Use the transmitter’s built-in self-test feature to identify internal faults. For sensor-related issues, inspect for contamination or damage and clean as needed. Refer to the manual for step-by-step diagnostic procedures. Employing these techniques helps pinpoint problems quickly, ensuring minimal downtime and maintaining accurate pressure measurements in industrial applications.
6.4 Repair and Replacement of Parts
Repairing or replacing parts on the Rosemount 3051C requires careful adherence to the manual. Identify faulty components using diagnostic tools and replace them with genuine Emerson parts. For remote diaphragm seals, ensure proper cleaning and reinstallation. Sensors and internal electronics should only be handled by trained personnel to avoid damage. Follow torque specifications for bolts and connections. After replacement, recalibrate the transmitter to maintain accuracy. Always refer to the manual for specific procedures and safety guidelines. If unsure, consult Emerson’s technical support for assistance. Proper repair ensures optimal performance and extends the transmitter’s lifespan in industrial applications.

Compliance and Safety
The Rosemount 3051C complies with international standards and certifications, ensuring adherence to safety guidelines and environmental considerations for hazardous areas, guaranteeing safe and reliable operation.
7.1 Industry Standards and Certifications
The Rosemount 3051C adheres to various industry standards and certifications, ensuring compliance with global regulations. It meets requirements for FOUNDATION Fieldbus and PROFIBUS PA protocols, as well as safety standards for hazardous areas. The transmitter is certified for use in environments requiring explosion-proof and intrinsically safe designs, ensuring safe operation in demanding conditions. Additionally, it complies with environmental regulations, making it suitable for diverse industrial applications. These certifications guarantee reliability, performance, and safety, aligning with international codes and practices. The Rosemount 3051C is designed to meet the rigorous demands of industries such as oil, gas, and chemical processing, where adherence to standards is critical for operational integrity.
7.2 Safety Precautions and Guidelines
When working with the Rosemount 3051C, it is essential to follow safety precautions to ensure personal and system safety. Always read the manual thoroughly before installation, operation, or maintenance. Wear appropriate protective equipment, such as gloves and safety glasses, when handling the transmitter. Ensure the area is clear of hazards and properly ventilated. Follow all local and international safety regulations, as well as the manufacturer’s guidelines. Avoid exposing the transmitter to extreme conditions beyond its rated specifications. Properly ground the device to prevent electrical hazards. Never attempt repairs without disconnecting power sources. Adhere to explosion-proof and intrinsic safety standards if operating in hazardous areas. Regularly inspect the transmitter for damage or wear, and address any issues promptly to maintain safe operation.
7.3 Environmental and Hazardous Area Considerations
The Rosemount 3051C is designed to operate in various environmental conditions, including hazardous areas. It meets international standards for explosion-proof and intrinsic safety, making it suitable for use in classified zones. The transmitter is certified to ATEX, IECEx, and other global standards, ensuring safe operation in potentially explosive atmospheres. For hazardous areas, proper installation and wiring must follow the manufacturer’s guidelines and local regulations. The device’s robust construction withstands extreme temperatures, humidity, and corrosion, making it ideal for harsh industrial environments. Always consult the manual for specific environmental ratings and certifications. Ensure all electrical connections and mounting comply with hazardous area requirements to maintain safety and performance. Regular inspections are recommended to verify compliance and integrity in demanding conditions.

Accessories and Compatible Products
The Rosemount 3051C supports various accessories, including remote diaphragm seals, capillaries, and coplanar flanges; Compatible products like the Profibus-PA transducer block enhance functionality and integration in industrial systems.
8.1 Transducer Block (TB) for Profibus-PA
The Transducer Block (TB) for Profibus-PA is a compatible accessory designed for seamless integration with the Rosemount 3051C Pressure Transmitter. It enables advanced communication and control in industrial automation systems, supporting Profibus-PA protocol for efficient data exchange. The TB is engineered to operate with high precision, ensuring reliable performance in harsh environments. It is fully compatible with the Rosemount 3051C series, including differential, gage, and absolute pressure transmitters. The Profibus-PA transducer block enhances system diagnostics and configuration capabilities, making it easier to monitor and maintain pressure measurement systems. Its robust design and compliance with international standards ensure durability and reliability in demanding applications.
8.2 Remote Diaphragm Seals and Capillaries
Remote diaphragm seals and capillaries are essential accessories for the Rosemount 3051C Pressure Transmitter, enabling pressure measurement in high-temperature or corrosive environments. These components isolate the transmitter from direct contact with harsh process fluids, ensuring accurate and reliable measurements. The diaphragm seals are typically made from durable materials like stainless steel, while the capillaries transmit pressure changes to the sensor. They are ideal for applications where the transmitter cannot be exposed to extreme conditions. The remote diaphragm seals and capillaries are compatible with various Rosemount 3051C models, including differential, gage, and absolute pressure transmitters. Their design ensures minimal maintenance and long-term performance in demanding industrial settings.
8.3 Coplanar Flange and SST Materials
The Rosemount 3051C features a coplanar flange design, which simplifies installation and ensures accurate pressure measurement. Constructed from high-quality SST (stainless steel) materials, the flange provides exceptional durability and resistance to corrosion. This design allows for direct mounting of the transmitter to the process, eliminating the need for additional adapters. The SST materials ensure compatibility with a wide range of process fluids and withstand harsh environmental conditions. The coplanar flange and SST construction contribute to the transmitter’s reliability and performance in demanding industrial applications, making it a robust solution for precise pressure measurement in various industries.