Rosemount 644 Temperature Transmitter with HART, FOUNDATION Fieldbus or PROFIBUS
Versatile Single Point temperature transmitter delivers field reliability and advancedfeatures tomeet demanding process needs
The Rosemount 644 offers a flexible and reliable solution to any temperature measurement need. As a highly accurate transmitter that comes in either HART, FOUNDATION Fieldbus or PROFIBUS PA communication protocols, as well as head mount, field mount, or rail mount form factors, the Rosemount 644 is designed to meet your most demanding applications. Available LCD display and Local Operator Interface provide local measurement indication and Transmitter-Sensor Matching functionality provides unmatched accuracy for a transmitter and RTD sensor measurement point. See Features & Benefits below for the complete model offering overview.
Features & Benefits：
All models include:
Ability to accept universal sensor inputs (RTDs, T/C, mV and ohm)
Transmitter-Sensor Matching improves system accuracy up to 75%
Ambient Temperature Compensation functionality
Variety of enclosure options for Head Mount including polished stainless steel housings for biotechnology, pharmaceutical and other sanitary applications
Available as an installation-ready Complete Point Solution that includes a variety of sensors, thermowells and enclosures
Temperature Transmitters / Rail Mount / Rosemount 248 Temperature Transmitter – Rail Mount – Intrinsically Safe
| Brand | Rosemount |
| Accuracy | ±0.75% |
| Measurement Type | Temperature Transmitter |
| Certificates | FM, CENELEC ATEX, CSA, IECEx |
| Output | 4–20 mA with digital signal based on HART Protocol |
| Digital Accuracy | ±0.45 °C (±0.81 °F) |
| input | 2, 3, 4-wire RTD |
| voltage supply | 12.0 to 42.4 VDC |
| Conduit entry size | M20 x 1.5 (CM20),1/2-14NPT |
| Display | Can choose |
| Original | China,Singapore,USA,Germany |
Technical parameters
1. The power supply voltage: DC10V ~ 32 v.
2. 4-20 ma output signal superposition of HART digital communication/agreement (two wire system), HART communication does not affect 4-20 ma analog output
3.by hand and debug software remote PC unit state management;
4. The internal environment are measured with Pt100 temperature, to be used for thermocouple cold junction compensation;
5. Cold junction compensation accuracy: 0.5 ℃;
Adjustable damping: 6. 0 to 32 seconds;
7. The data refresh rate: 4 times/S;
8. Stability: + / – 0.2% per year
9. Working temperature environment: – 40 ℃ ~ + 85 ℃ (LCD operating temperature range: – 20 ℃ ~ + 70 ℃).
10. Overall dimensions: ￠44 mm;
11. The installation hole spacing: 33 mm;
12. Mechanical vibration resistance: 10 ~ 60 hz, 0.21 mm sine wave;
13. The radio frequency interference: IEC61000-4-3, 20 v/M, 80 ~ 1000 MHZ
