Esdun Industrial 
Product Description
Engineered for versatility, the Rosemount 644Temperature Transmitter is available with HART, FOUNDATION Fieldbus or PROFIBUS protocols in head, field or rail mount styles and a variety of enclosure options. By adding a Local Operator Interface (LOI), you can update your transmitter configuration in the field without tools. For diverse application requirements, this transmitter includes diagnostic capabilities, such as Hot Backup capability, sensor drift alert and thermocouple degradation.
Specifications
- Input：
- Dual and single sensor capability with universal sensor inputs (RTD, T/C, mV, ohms)
- Output Signal：
- 4-20 mA /HART protocol, FOUNDATION fieldbus protocol, PROFIBUS PA protocol
- Housing：
- Field mount, DIN A head mount or rail mount
- Display/Interface：
- LCD Display, LCD Display with Local Operator Interface (LOI), or LED
- Diagnostics：
- Basic diagnostics, Hot Backup capability, sensor drift alert, thermocouple degradation, min/max tracking
- Calibration Options：
- Transmitter-sensor matching (Callendar-Van Dusen constants), 5-point calibration
- Certifications/Approvals：
- SIL 2/3 certified to IEC 61508 by an independent 3rd party, hazardous location, marine type, see full specs for complete list of certifications
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
