Rosemount 644 temperature transmitter is versatile and can use HART™, FOUNDATION™ fieldbus or PROFIBUS™ protocol. It has top, field or rail mounting styles and a variety of housing options. By adding a local operator interface (LOI), the transmitter configuration can be updated in the field without tools. The transmitter also includes diagnostic functions such as Hot Backup™, sensor drift warning and thermocouple performance degradation to meet different application requirements.
Specifications
input
Support universal sensor input (RTD, T/C, mV, ohms), and support single sensor or double sensor assembly.
output signal
4-20 ma/hart protocol, FOUNDATION™ fieldbus protocol and PROFIBUS™ PA protocol.
shell
Field installation, DIN A head installation or rail installation.
Display/interface
LCD display, LCD display with local operator interface (LOI)
diagnose
Basic diagnosis, Hot Backup™ function, sensor drift warning, thermocouple aging, min/max tracking.
Calibration option
Transmitter-sensor matching (Calende-Van Dussen constant), 5- point calibration.