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Reference Manual
00809-0200-4728, Rev RA
Appendix A: Specifications and Reference Data
April 2015
Specifications and Reference Data
A.5.3
Performance specifications
EMC (Electromagnetic Compatibility)
NAMUR NE 21 Standard
The 644H HART meets the requirements for NAMUR NE 21 Rating.
CE EMC compliance testing
The 644 is compliant with Directive 2004/108/EC. Meets the criteria under IEC 61326:2006
Power supply effect
Less than ±0.005% of span per volt
Stability
RTDs and thermocouples have a stability of ±0.15% of output reading or 0.15 °C (whichever is
greater) for 24 months
Self calibration
The analog-to-digital measurement circuitry automatically self-calibrates for each temperature
update by comparing the dynamic measurement to extremely stable and accurate internal
reference elements.
Vibration effect
The 644 is tested to the following specifications with no effect on performance per IEC 60770-1,
1999:
Susceptibility
Parameter
Influence
HART
ESD
6 kV contact discharge
8 kV air discharge
None
Radiated
80 – 1000 MHz at 10 V/m AM
< 1.0%
Burst
1 kV for I.O.
None
Surge
0.5 kV line–line
1 kV line–ground (I.O. tool)
None
Conducted
10 kHz to 80 MHz at 10V
< 1.0%
Frequency
Vibration
10 to 60 Hz
0.21 mm displacement
60 to 2000 Hz
3 g peak acceleration
Summary of Contents for Rosemount 644
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