Key Benefits and Advantages
Exceptional Accuracy and Stability: The ST800 series delivers a reference accuracy of up to 0.0375% of span. Furthermore, it features a stability of 0.01% of URL (Upper Range Limit) per year for ten years. This long-term stability reduces the frequency of manual calibrations, lowering the total cost of ownership.
Modular Design for Easy Maintenance: SmartLine transmitters are built with a unique modular architecture. The display, electronic modules, and sensor head can be replaced or upgraded in the field without affecting the overall performance or requiring a full factory recalibration. This plug-and-play capability ensures high plant availability.
Advanced Graphics Display: The ST800 features a rich, high-resolution alphanumeric LCD. It provides much more than just a pressure reading; it can display bar graphs, trend charts, and diagnostic messages in multiple languages. The interface allows for local configuration using three external buttons, even in hazardous environments.
Smart Logging and Diagnostics: Integrated on-board logging allows the transmitter to store process variables and diagnostic data over time. This historical data is invaluable for troubleshooting and analyzing process upsets. The ST800 also provides advanced diagnostics for sensor health and loop integrity.
Standard Integration and Universal Compatibility: The ST800 supports all major communication protocols, including HART 7, DE (Digitally Enhanced), FOUNDATION Fieldbus, and PROFIBUS PA. It is designed to integrate seamlessly with Honeywell’s Experion PKS or any other third-party control system.
Static Pressure and Temperature Compensation: Each ST800 transmitter is characterized for both temperature and static pressure variations. This internal compensation ensures that the absolute pressure reading remains precise even when ambient or process conditions fluctuate.
Technical Properties
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Measurement Type: Absolute Pressure (STA800).
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Reference Accuracy: Up to 0.0375% of span.
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Stability: 0.01% per year for 10 years.
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Turndown Ratio: Up to 400:1.
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Communication: HART, DE, FOUNDATION Fieldbus, or PROFIBUS PA.
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Enclosure Rating: IP66/67 and NEMA 4X.
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Materials: Available in 316 Stainless Steel, Hastelloy C-276, and Monel.
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Safety: SIL 2/3 certified as a standard feature.
Field of Application
The STA800 is optimized for applications that require a stable zero reference and high sensitivity in low-pressure ranges.
Primary Industries and Uses:
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Vacuum Distillation: Monitoring the top of distillation columns where absolute pressure is critical for product purity.
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Chemical Processing: Measuring reactor pressures in low-vacuum chemical syntheses.
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Power Generation: Monitoring condenser vacuum to optimize turbine efficiency.
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Pharmaceutical: Precise pressure control in freeze-drying and vacuum-based drying processes.
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Food and Beverage: Managing vacuum levels in evaporation and concentration stages.
