Performance Specifications - Emerson Rosemount 248 Reference Manual

Appendix A: Specifications and reference data
March 2014
Enclosure ratings
The Universal (option code U) and Rosemount Connection (option code A) Heads are NEMA 4X,
IP66, and IP68. The Universal Head with
head (option code B) is IP54.
A.1.3

Performance specifications

EMC (ElectroMagnetic Compatibility) NAMUR NE21 Standard
The Rosemount 248 meets the requirements for NAMUR NE21 Rating.
Susceptibility
ESD
Radiated
Burst
Surge
Conducted
CE mark
The Rosemount 248 meets all requirements listed under IEC 61326: Amendment 1, 1998.
Power supply effect
Less than ±0.005% of span per volt
Vibration effect
The Rosemount 248 is tested to the following specifications with no effect on performance:
Frequency
10 to 60 Hz
60 to 2000 Hz
Stability
For RTD and thermocouple inputs, the transmitter will have a stability of ±0.1% of reading or 0.1
°C (whichever is greater) for twelve 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.
54
1 / -in. NPT threads is CSA Enclosure Type 4X. The BUZ
2
Parameter
6 kV contact discharge
8 kV air discharge
80 – 1000 MHz at 10 V/m AM
1 kV for I.O.
0.5 kV line–line
1 kV line–ground
150 kHz to 80 MHz at 10 V
Vibration
0.21 mm displacement
3 g peak acceleration
Reference Manual
00809-0100-4825, Rev CB
Influence
None
None
None
None
None
Specifications and Reference Data