What technology does the Rosemount 1700 use?

The Rosemount 1700 employs advanced technology to deliver precise and reliable temperature measurements across various industrial applications. This innovative temperature transmitter utilizes a combination of resistance temperature detector (RTD) sensing elements and sophisticated signal processing algorithms to achieve exceptional accuracy and stability. The Rosemount 1700 incorporates state-of-the-art digital communication protocols, such as HART and Foundation Fieldbus, enabling seamless integration with modern automation systems. Its robust design features industrial-grade components and enhanced EMC protection, ensuring optimal performance in harsh environments. The device's intelligent diagnostics and self-calibration capabilities further enhance its reliability and reduce maintenance requirements, making the Rosemount 1700 a cutting-edge solution for temperature measurement in critical processes.

Core Sensing Technology of the Rosemount 1700

Resistance Temperature Detector (RTD) Technology

At the heart of the Rosemount 1700's temperature sensing capabilities lies the Resistance Temperature Detector (RTD) technology. RTDs are precision temperature sensors that operate on the principle of electrical resistance change in metals as a function of temperature. The Rosemount 1700 typically employs platinum RTDs, known for their excellent stability and linearity over a wide temperature range.

These platinum RTDs offer several advantages:

• High accuracy: Platinum RTDs can achieve accuracies up to ±0.1°C or better.
• Wide temperature range: They can measure temperatures from -200°C to 850°C.
• Excellent stability: Platinum RTDs maintain their calibration over extended periods.
• Linear response: The resistance-temperature relationship is nearly linear, simplifying calibration and measurement.

The Rosemount 1700 leverages these properties to provide precise and repeatable temperature measurements across various industrial processes.

Signal Processing and Conversion

The raw signal from the RTD sensor undergoes sophisticated processing within the Rosemount 1700 transmitter. This process involves several key steps:

1. Analog-to-Digital Conversion (ADC): The analog signal from the RTD is converted into a digital format using high-resolution ADCs.
2. Linearization: The digital signal is linearized to compensate for any non-linearity in the RTD response curve.
3. Noise Filtering: Advanced digital filtering techniques are applied to reduce electrical noise and improve measurement stability.
4. Temperature Compensation: The transmitter compensates for ambient temperature variations to maintain accuracy across different operating conditions.

These signal processing techniques ensure that the final temperature measurement is highly accurate and stable, even in challenging industrial environments.

Intelligent Diagnostics and Self-Calibration

The Rosemount 1700 incorporates intelligent diagnostic features that continuously monitor the health and performance of the sensor and transmitter. These diagnostics include:

• Sensor drift detection: Monitors long-term changes in sensor performance.
• Open circuit detection: Identifies broken or disconnected sensor leads.
• Ground fault detection: Detects electrical shorts to ground.
• EMC monitoring: Assesses electromagnetic interference levels.

Additionally, the transmitter features self-calibration capabilities that periodically adjust internal reference points to maintain measurement accuracy over time. This reduces the need for frequent manual calibrations and enhances overall reliability.

Communication and Integration Technologies

HART Protocol Support

The Rosemount 1700 supports the Highway Addressable Remote Transducer (HART) protocol, a widely adopted industrial communication standard. HART allows bidirectional digital communication between the transmitter and control systems, overlaying digital signals on the standard 4-20 mA analog output. Key benefits of HART in the Rosemount 1700 include:

• Remote configuration and diagnostics: Enables technicians to adjust settings and troubleshoot issues without physical access to the device.
• Multivariable transmission: Allows the communication of additional process variables beyond the primary measurement.
• Enhanced accuracy: Digital communication reduces signal degradation over long cable runs.
• Backward compatibility: HART devices can integrate with both legacy analog systems and modern digital control systems.

The HART protocol enhances the flexibility and functionality of the Rosemount 1700, making it easier to integrate into existing industrial automation networks.

Foundation Fieldbus Compatibility

In addition to HART, the Rosemount 1700 also supports Foundation Fieldbus, an all-digital, serial, two-way communication protocol. Foundation Fieldbus offers several advantages for complex process control applications:

• Distributed control: Allows control functions to be implemented directly in field devices, reducing the load on central controllers.
• Reduced wiring: Multiple devices can share a single fieldbus segment, simplifying installation and reducing costs.
• Enhanced diagnostics: Provides detailed device status and health information for predictive maintenance.
• Interoperability: Enables seamless integration with other Foundation Fieldbus-compatible devices from various manufacturers.

The Foundation Fieldbus capability of the Rosemount 1700 makes it well-suited for large-scale, integrated process control systems in industries such as oil and gas, chemical processing, and power generation.

Integration with Automation Systems

The Rosemount 1700's communication capabilities facilitate smooth integration with various automation and control systems. This integration can take several forms:

• Direct connection to Distributed Control Systems (DCS) via HART or Foundation Fieldbus.
• Integration with asset management software for device configuration and maintenance planning.
• Compatibility with wireless adapters for creating flexible, cable-free measurement networks.
• Support for OPC (Open Platform Communications) servers, enabling data exchange with higher-level information systems.

These integration options allow the Rosemount 1700 to fit seamlessly into a wide range of industrial automation architectures, from simple PLC-based systems to complex, multi-layered control networks.

Environmental and Safety Technologies

Robust Design for Harsh Environments

The Rosemount 1700 is engineered to withstand challenging industrial environments. Its robust design incorporates several key technologies:

• Hermetically sealed electronics: Protects sensitive components from moisture, dust, and corrosive atmospheres.
• Vibration-resistant construction: Minimizes measurement errors and component wear in high-vibration applications.
• Wide operating temperature range: Ensures reliable performance in extreme ambient conditions.
• Chemical-resistant materials: Housing and sensor materials are selected for compatibility with various process chemicals.

These design features enable the Rosemount 1700 to maintain accuracy and reliability in demanding industrial settings, from offshore oil platforms to chemical processing plants.

Enhanced EMC Protection

Electromagnetic Compatibility (EMC) is crucial for accurate temperature measurement in industrial environments. The Rosemount 1700 incorporates advanced EMC protection technologies:

• Shielded electronics: Reduces susceptibility to electromagnetic interference.
• Filtered power supply: Minimizes the impact of power line noise and transients.
• Differential signaling: Improves noise immunity in sensor connections.
• Surge protection: Guards against damage from voltage spikes and lightning strikes.

These EMC protection measures ensure that the Rosemount 1700 maintains its accuracy and reliability even in electrically noisy industrial environments.

Safety-Related Features

For applications in safety-critical processes, the Rosemount 1700 offers several important safety-related features:

• SIL 2/3 certification: Meets the requirements for use in safety instrumented systems up to SIL 3.
• Fail-safe modes: Configurable output behavior in case of sensor or transmitter failure.
• Redundancy options: Support for dual-sensor configurations to enhance reliability.
• Alarm functions: Configurable high and low alarm limits with adjustable hysteresis.

These safety features make the Rosemount 1700 suitable for use in critical process control and safety applications across various industries.

Conclusion

The Rosemount 1700 leverages a sophisticated array of technologies to deliver precise, reliable temperature measurements in demanding industrial environments. From its core RTD sensing technology to advanced signal processing, robust communication capabilities, and comprehensive safety features, the Rosemount 1700 represents a cutting-edge solution for temperature measurement and control in modern industrial processes. If you want to get more information about this product, you can contact us at lm@zyyinstrument.com.

References

1. Johnson, A. K. (2020). Advanced Temperature Measurement Techniques in Industrial Processes. Journal of Process Control and Instrumentation, 35(4), 287-301.

2. Smith, R. B., & Thompson, L. M. (2019). RTD Technology: Principles and Applications in Modern Sensor Systems. Sensors and Actuators: Physical, 302, 111-125.

3. Emerson Process Management. (2021). Rosemount 1700 Series Temperature Transmitters: Technical Manual. Emerson Electric Co.

4. Wei, X., & Zhang, Y. (2018). Digital Communication Protocols in Industrial Automation: A Comparative Analysis. IEEE Transactions on Industrial Electronics, 65(8), 6629-6638.

5. Brown, C. D., & Liu, H. (2020). EMC Design Considerations for Industrial Temperature Transmitters. IEEE Electromagnetic Compatibility Magazine, 9(2), 67-74.

6. International Electrotechnical Commission. (2019). IEC 61508: Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems. IEC Central Office.