Rosemount 644H temperature transmitter and Rosemount 644r intelligent temperature transmitter are extensions of Rosemount Rosemount temperature transmitter instrument series, which can receive 2, 3 and 4-wire thermal resistance, thermocouple, resistance and millivolt input. The ambient temperature of each transmitter is special
The Rosemount 644H temperature transmitter can be installed in the connecting shell on the sensor to form an integrated temperature component, or installed in a junction box away from the sensor, or installed on the guide rail using the optional installation component (00644-5301-0010). Rosemount 644r temperature transmitters can be mounted directly on walls or din rails.
Rosemount 644 temperature transmitter has excellent performance and reliability compared with sensor direct wiring
The optional Wago spring clamp terminal provides an anti vibration connection mode for occasions without fastening
It can greatly reduce the cost of conductor and labor
Advanced diagnostic features reduce the number of field repairs
Ordering complete temperature transmitter and sensor assemblies simplifies installation, specification, and ordering, reducing costs
Excellent accuracy, stability and anti radio interference ability, reducing process variability
Excellent performance and reliability of Rosemount 644 temperature transmitter
The transmitter sensor comparison function can improve the measurement accuracy of the whole system
Temperature correction circuit to reduce the impact of ambient temperature
Independent alarm circuit to detect electronic board and sensor failure
The performance index shall be at least 3 σ
Accuracy: ± 0.15 ℃ (± 0.27of), PT100 thermal resistance
Stability: ± 0.1% reading or ± 0.1 ℃, whichever is greater, 12 months, thermal resistance and Thermocouple Input
There is no limit to the range setting within the range of the sensor
The optional Wago spring clamp terminal provides an anti vibration connection mode for occasions without fastening
Maintainability
Compatibility with HART 375, Hart 475 and AMS device management system based on PC
Improve process efficiency, quality and productivity
Main indicators
Simulation accuracy: ± 0.03% of range
Digital accuracy: ± 0.15 ℃ (± 0.27f), PT100 thermal resistance
Influence of ambient temperature: 0.003 ℃ / 1.0 ℃, Pt100
Stability: within one year, the error is ± 0.1%
Input: thermocouple, MV, Ohm
Output: 4-20mA, using HART communication protocol
Supply voltage: 12.0 to 42.4 Volts
