Rosemount 644 Integrated Temperature Transmitter
1. General Description
The Rosemount 644 Integrated Temperature Transmitter is a flexible device. Engineers design it for high performance and reliable temperature measurement.
This transmitter works well in many industrial applications. It helps monitor and control process variables.
It does this with accurate input and output handling. It also provides feedback control for PID control loops.
The Rosemount 644 smart temperature transmitter tracks minimum and maximum temperatures. It supports up to 10 extra function blocks. This transmitter is great for rail mount or DIN rail mounting.
This manufacturer designs this transmitter for control applications. It provides accurate temperature readings and supports control algorithms. This helps ensure the best performance in real-world industrial processes.
2. Technical Specifications
l Model: Rosemount 644
l Measurement Range: -50 to +85 °C (-58 to +185 °F)
l Accuracy: ±0.10°C (±0.18°F)
l Output Signal: 4-20 mA with HART® or digital output via FOUNDATION™ Fieldbus or PROFIBUS® PA
l Power Supply Voltage: 12–42 VDC
l Isolation Voltage: 500 VAC
l Humidity Limits: 0–95% RH (non-condensing)
l Features: Dual or single sensor capability, integral LCD for local display, advanced diagnostics, Hot Backup™ for critical applications
3. Rosemount 644 Features
l Smart Temperature Monitoring: Provides real-time temperature reading, minimum and maximum tracking, and sensor diagnostics.
l Flexible Mounting Options: Supports rail-mount transmitters, head-mount, and field-mount installations.
l Function Blocks: Can run up to 10 additional instantiated function blocks for process control and PID control.
l High Accuracy and Stability: Ensures full range, wide range, and reliable industrial process control.
l User-Friendly Configuration: Supports Rosemount 644 configuration via HART or digital interfaces for optimal control algorithms.
4. Applications
l Oil and Gas: Temperature monitoring in pipelines and process vessels.
l Chemical Processing: Ensuring optimal temperature control for reactions.
l HVAC Systems: Efficient heating and cooling system management.
l Food & Beverage Manufacturing: Compliance with safety and quality standards.
5. Rosemount 644 Installation Procedure (Step by Step)
l Preparation: Gather tools and safety gear, and review the Rosemount 644 transmitter installation manual.
l Mounting: Choose DIN rail mounting, head, or field mount, and secure the transmitter using the supplied hardware.
l Wiring: Follow the wiring diagram for proper input and output connections; ensure electrical safety.
l Turn on the transmitter. Set up the Rosemount 644. Adjust the zero and span values. Configure the function blocks as needed.
l Testing: Conduct loop tests, compare readings with known temperature values, and verify feedback control performance.
l Final Checks: Inspect all connections, document settings, and ensure stable operation.
6. Related Rosemount 644 Products
l 644H-HART
l 644F-FIELD
l Emerson Rosemount 644 Rail Mount
Rosemount 3051 Multivariable Differential Pressure Transmitter
Rosemount 3051DP Coplanar Transmitter Level Gauge
Rosemount 2088 Gauge and Absolute Pressure Transmitters
Rosemount 2051L Flange Diaphragm Level Transmitter
