How They Made It Work: Emerson Rosemount 3144S Temperature Transmitter
Company
Technology
Emerson designed the Rosemount 3144S temperature transmitter to address common temperature-measurement challenges and industry trends in the chemical processing industry.
The transmitter provides 0.05°C accuracy and 20-year stability to ensure valid and consistent measurements. The transmitter also offers extended calibration intervals to reduce trips to the field.
Measurement reliability was further enhanced with complete diagnostic coverage from the sensor to the control room for real-time insight into each measurement point while minimizing downtime.
Emerson designed the Rosemount 3144S with user-friendly features, such as Bluetooth connectivity and plug-and-play sensor configuration, to meet the needs of the current workforce as more experienced workers retire.
Significance in chemical operations
The transmitter’s 20-year stability specification helps minimize maintenance, which is especially valuable in industries with continuous reaction processes. Its Hot Backup capability and RTD measurement protection were designed to ensure uninterrupted operation in the event of sensor failure, sensor degradation or wiring issues.
The transmitter’s advanced diagnostics, including loop integrity monitoring and thermocouple degradation, can help mitigate potential problems by providing early detection of issues that could compromise operational performance.
The transmitter also is compatible with Rosemount X-well technology, allowing for non-intrusive temperature measurement in more high temperature applications, like reactors or heat exchangers. This eliminates the need for thermowells, while reducing design complexity and installation costs.
Unique features
- ±0.05°C accuracy
- 20-year stability specification and a 20-year warranty.
- ReadyConnect technology for plug-and-play sensor configuration
- Interface with Bluetooth wireless connectivity a task-based menu structure and a customizable backlit LCD display for enhanced readability and consistent user experience across communication tools
- Rosemount X-well technology for non-intrusive temperature measurement up to 650°C, eliminating the need for thermowells
- Full diagnostic coverage from sensor to control room
- Loop Integrity, which continuously monitors for hidden electrical issues
- RTD measurement protection, which automatically switches from 4-wire to 3-wire RTD input configuration if a wire becomes compromised anywhere from the sensor element to the transmitter terminal connections
Challenges addressed
The ReadyConnect Technology has been shown to reduce configuration time up to 90+%, while eliminating manual input errors when configuring a calibrated RTD sensor with Callendar-Van Dusen coefficients. Simple input errors during configuration can impact measurements by over 10 degrees, sometimes much more.
The Rosemount X-well technology has been tested heavily in the chemical industry, particularly where high-temperature and corrosive process fluids can damage a thermowell, creating a safety issue. By providing a non-intrusive solution and removing the need for a thermowell and a process penetration, this risk of thermowell failure and process shutdown can be eliminated.
Case study
A major ethylene plant in North America needed to improve the operation of its distillation columns. The facility required high accuracy and reliability from its temperature measurements across its distillation columns profile to optimize product quality, yield and energy efficiency. Plant operators would often alter control strategies based on temperature measurements, so they need fast and accurate speed of response for tighter temperate control to reduce energy use by ensuring separations occurring at the right level. The Rosemount 3144S provided the measurements operators needed to optimize the performance of their distillation columns.