644 Temperature Transmitter

Brand: Rosemount
Rosemount Temperature Transmitter, 644 Series
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644 Temperature Transmitter

Brand: Rosemount
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Reduce complexity and simplify the day to day operations of your diverse temperature applications with the versatile Rosemount 644 family of temperature transmitters. 

Make better decisions for your process with the new and easy to use Rosemount 644 Transmitter capabilities including: diagnostics, safety certification, integral transient protection and display options. 

The Rosemount 644 is a Versatile Temperature Transmitter that delivers field reliability and advanced accuracy and stability to meet demanding process needs.
Features
  • Extremely Versatile Temperature Transmitter Available in Hart®, Foundation™ Fieldbus or PROFIBUS® Protocols
  • Diverse Mounting Configurations Including Head, Field or Rail Mount with Many Enclosure Options
  • LOI Option Eliminates the Need for Special Configuration Tools: i.e. Field Communicator, for Ease-of-Use
  • Transmitter-Sensor Matching with Callendar-Van Dusen Constants Reduces Total Measurement Error
  • Hot Backup™ Capability and Sensor Drift Alert with Dual Sensors Ensure Measurement Integrity
  • Thermocouple Degradation Diagnostic Monitors Thermocouple Health to Detect Degradation Before Failure
  • Minimum and Maximum Temperature Tracking Observes Temperature Extremes for Easy Troubleshooting
  • Device Dashboards Provide Easy Interface for Simplified Device Configuration and Diagnostic Troubleshooting

Specifications

Brand

Accuracy

  • ± 0.03 % of Span

Alarm

  • NAMUR Alarm & Saturation Signal Levels

Approvals & Certifications

  • ATEX
  • CSA
  • FM
  • IEC Ex
  • INMETRO
  • TIIS

Conduit Connection

  • A Size Mini, 4-Pin Male Connector (minifast)
  • M12, 4-Pin, Male Connector (eurofast)

Configuration

  • FOUNDATION Fieldbus Protocols
  • HART Protocols
  • PROFIBUS PA Protocol

Damping Adjustment

  • 0 seconds Default

Display

  • LCD Display
  • LCD Display with Local Operator Interface

Electrical Connectors

  • Compression Screws Permanently Fixed to Terminal Block

Electromagnetic Interference Effect

  • Meets All Relevant Requirements of EN 61326 & NAMUR NE-21

Enclosure Finish

  • Polyurethane Paint

Enclosure, Body Material

  • Aluminum
  • Cast Stainless Steel, Polished Stainless Steel

Environmental Protection

  • IP66
  • IP68
  • NEMA 4X / IP66, 68

Humidity

  • 0 to 95 % RH

Input Power

  • 42.4 Vdc

Mounting

  • 316 Stainless Steel U-bolt Mounting Bracket with 2" Pipe Mount
  • L' Mounting Bracket for 2" Pipe or Panel Mounting

O-Ring Material

  • Buna-N

Operating Temperature

  • -40° to 85° C (-40° to 185° F)

Output

  • 2-Wire 4-20 mA

Power Supply Effect

  • ± 0.005 % of Span Per Volt

Process Temperature

  • 55° to 450° C (131° to 842° F)

Sensor, Probe Connection

  • 2-Wire
  • 3-Wire
  • 4-Wire
  • T/C & mV

Sensor, Probe Type

  • B Thermocouple
  • DIN Typical L
  • DIN Typical U
  • E Thermocouple
  • GOST L
  • J Thermocouple
  • K Thermocouple
  • N Thermocouple
  • R Thermocouple
  • S Thermocouple
  • T Thermocouple
  • Typical W5Re/W26Re

Stability

  • ± 0.15 % of Output Reading or 0.15° C (32.3° F) whichever is greater, for 24-months

Storage Temperature

  • -50° to 120° C (-58° to 248° F)

Temperature Effect

  • 0.001 % of Span

Vibration Effect

  • Frequency: 60 to 1000 Hz = Vibration: 5 G (50 MPS²) Peak Acceleration

Documentation

Data Sheets

Product Manuals

Certificates & Approvals

Drawings & Schematics

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