Emerson Rosemount 248, Reference Manual

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56
Reference Manual
00809-0100-4825, Rev CB
Appendix A: Specifications and reference data
March 2014
Specifications and Reference Data
Transmitter accuracy example
When using a Pt 100 (a = 0.00385) sensor input with a 0 to 100 °C span: Accuracy would be
±0.2 °C.
Table A-2. Rosemount 248 Transmitter input Options, Accuracy, and Ambient Temperature Effects
Sensor Transmitter input ranges
(1)
(1) Input ranges are for transmitter only. Actual sensor (RTD or Thermocouple) operating ranges may be more limited. See “Sensor specifications” on page -57
Appendix A: Sensor specifications
for temperature ranges.
Accuracy
Temperature effects per
1.0 °C (1.8 °F) change in
ambient temperature
(2)
(2) Change in ambient is with reference to the calibration temperature of the transmitter at 68 °F (20 °C) from factory.
°C °F Fixed
% of
span Fixed
% of
span
2-, 3-, 4-wire RTDs
Pt 100
(3)
(

= 0.00385)
(3) IEC 751, 1995.
–200 to 850 –328 to 1562 0.2 °C (0.36 °F) ±0.1 0.006 °C (0.011 °F) ±0.004
Pt 100
(4)
(

= 0.003916)
(4) JIS 1604, 1981.
–200 to 645 –328 to
11
93 0.2 °C (0.36 °F) ±0.1 0.006 °C (0.011 °F) ±0.004
Pt 200
(3)
–200 to 850 –328 to 1562 1.17 °C (2.11 °F) ±0.1 0.018 °C (0.032 °F) ±0.004
Pt 500
(3)
–200 to 850 –328 to 1562 0.47 °C (0.85 °F) ±0.1 0.018 °C (0.032 °F) ±0.004
Pt 1000
(3)
–200 to 300 –328 to 572 0.23 °C (0.41 °F) ±0.1 0.010 °C (0.018 °F) ±0.004
Ni 120
(5)
(5) Edison Curve No. 7.
–70 to 300 –94 to 572 0.16 °C (0.29 °F) ±0.1 0.004 °C (0.007 °F) ±0.004
Cu 10
(6)
(6) Edison Copper Winding No. 15.
–50 to 250 –58 to 482 2 °C (3.60 °F) ±0.1 0.06 °C (0.108 °F) ±0.004
Cu 50 (

= 0.00428) -185 to 200 -365 to 392 0.68 °C (1.22 °F) ±0.1 0.012 °C (0.022 °F) ±0.004
Cu 100 (

= 0.00428) -185 to 200 -365 to 392 0.34 °C (0.61 °F) ±0.1 0.006 °C (0.011 °F) ±0.004
Cu 50 (

= 0.00426) -50 to 200 -122 to 392 0.68 °C (1.22 °F) ±0.1 0.012 °C (0.022 °F) ±0.004
Cu 100 (

= 0.00426) -50 to 200 -122 to 392 0.34 °C (0.61 °F) ±0.1 0.006 °C (0.011 °F) ±0.004
PT 50 (

= 0.00391) -200 to 550 -392 to 1022 0.40 °C (0.72 °F) ±0.1 0.012 °C (0.022 °F) ±0.004
PT 100 (

= 0.00391) -200 to 550 -392 to 1022 0.20 °C (0.36 °F) ±0.1 0.006 °C (0.011 °F) ±0.004
Thermocouples
(7)
(7) Total accuracy for thermocouple measurement: sum of ac0.5 °C.
Type B
(8)(9)
(8) NIST Monograph 175, IEC 584.
(9) Fixed accuracy for NIST Type B is ±5.4 °F (±3.0 °C) from 212 to 572 °F (100 to 300 °C).
100 to 1820 212 to 3308 1.5 °C (2.70 °F) ±0.1 0.056 °C (0.101 °F) ±0.004
Type E
(8)
–50 to 1000 –58 to 1832 0.4 °C (0.72 °F) ±0.1 0.016 °C (0.029 °F) ±0.004
Type J
(8)
–180 to 760 –292 to 1400 0.5 °C (0.90 °F) ±0.1 0.016 °C (0.029 °F) ±0.004
Type K
(8)(10)
(10) Fixed accuracy for NIST Type K is ±1.3 °F (±0.7 °C) from -292 to -130 °F (-130 to -90 °C).
–180 to 1372 –292 to 2502 0.5 °C (0.90 °F) ±0.1 0.02 °C (0.036 °F) ±0.004
Type N
(8)
–200 to 1300 –328 to 2372 0.8 °C (1.44 °F) ±0.1 0.02 °C (0.036 °F) ±0.004
Type R
(8)
0 to 1768 32 to 3214 1.2 °C (2.16 °F) ±0.1 0.06 °C (0.108 °F) ±0.004
Type S
(8)
0 to 1768 32 to 3214 1 °C (1.80 °F) ±0.1 0.06 °C (0.108 °F) ±0.004