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Reference Manual
00809-0100-4697, Rev EA
October 2011
A-5
Rosemount 848T
Accuracy
Differential Configuration Notes
Differential capability exists between any two sensor types.
For all differential configurations, the input range is X to Y where
Accuracy for Differential Configurations:
If sensor types are similar (for example, both RTDs or both thermocouples), the accuracy = 1.5 times worst case accuracy of either sensor type.
If sensor types are dissimilar (for example, one RTD and one thermocouple), the accuracy = Sensor 1 Accuracy + Sensor 2 Accuracy.
Table 1. Input Options/Accuracy
Sensor Option
Input Ranges Accuracy Over Range(s)
Sensor Reference °C °F °C °F
2- and 3-Wire RTDs
Pt 50 (␣ = 0.00391) GOST 6651-94 –200 to 550 –328 to 1022 ± 0.57 ± 1.03
Pt 100 (␣ = 0.00391) GOST 6651-94 –200 to 550 –328 to 1022 ± 0.28 ± 0.50
Pt 100 (␣ = 0.00385) IEC 751; ␣ = 0.00385, 1995 –200 to 850 –328 to 1562 ± 0.30 ± 0.54
Pt 100 (␣ = 0.003916) JIS 1604, 1981 –200 to 645 –328 to 1193 ± 0.30 ± 0.54
Pt 200 (␣ = 0.00385) IEC 751; ␣ = 0.00385, 1995 –200 to 850 –328 to 1562 ± 0.54 ± 0.98
Pt 200 (␣ = 0.003916) JIS 1604; ␣ = 0.003916, 1981 –200 to 645 –328 to 1193 ± 0.54 ± 0.98
Pt 500 IEC 751; ␣ = 0.00385, 1995 –200 to 850 –328 to 1562 ± 0.38 ± 0.68
Pt 1000 IEC 751; ␣ = 0.00385, 1995 –200 to 300 –328 to 572 ± 0.40 ± 0.72
Ni 120 Edison Curve No. 7 –70 to 300 –94 to 572 ± 0.30 ± 0.54
Cu 10 Edison Copper Winding No. 15 –50 to 250 –58 to 482 ± 3.20 ± 5.76
Cu 100 (a=428) GOST 6651-94 -185 to 200 -365 to 392 ± 0.48 ±0.86
Cu 50 (a=428) GOST 6651-94 -185 to 200 -365 to 392 ± 0.96 ±1.73
Cu 100 (a=426) GOST 6651-94 -50 to 200 -122 to 392 ± 0.48 ±0.86
Cu 50 (a=426) GOST 6651-94 -50 to 200 -122 to 392 ± 0.96 ±1.73
Thermocouples—Cold Junction Adds + 0.5 °C to Listed Accuracy
NIST Type B (Accuracy varies
according to input range)
NIST Monograph 175 100 to 300
301 to 1820
212 to 572
573 to 3308
± 6.00
± 1.54
± 10.80
± 2.78
NIST Type E NIST Monograph 175 –200 to 1000 –328 to 1832 ± 0.40 ± 0.72
NIST Type J NIST Monograph 175 –180 to 760 –292 to 1400 ± 0.70 ± 1.26
NIST Type K NIST Monograph 175 –180 to 1372 –292 to 2501 ± 1.00 ± 1.80
NIST Type N NIST Monograph 175 –200 to 1300 –328 to 2372 ± 1.00 ± 1.80
NIST Type R NIST Monograph 175 0 to 1768 32 to 3214 ± 1.50 ± 2.70
NIST Type S NIST Monograph 175 0 to 1768 32 to 3214 ± 1.40 ± 2.52
NIST Type T NIST Monograph 175 –200 to 400 –328 to 752 ± 0.70 ± 1.26
DIN L DIN 43710 –200 to 900 –328 to 1652 ± 0.70 ± 1.26
DIN U DIN 43710 –200 to 600 –328 to 1112 ± 0.70 ± 1.26
w5Re26/W26Re ASTME 988-96 0 to 2000 32 to 3632 ± 1.60 ± 2.88
GOST Type L GOST R 8.585-2001 -200 to 800 -392 to 1472 ± 0.71 ± 1.28
Terminal Temperature -50 to 85 -58 to 185 ±3.50 ± 6.30
Ohm Input 0 to 2000 ohms ± 0.90 ohms
Millivolt Input -10 to 100 mV ± 0.05 mV
1000 mV -10 to 1000 mV ± 1.0 mA
4–20 mA (Rosemount)
(1)
4–20 mA ± 0.01 mA
4–20 mA (NAMUR)
(1)
4–20 mA ± 0.01 mA
Multipoint Sensors
(2)
(1) Requires the S002 option code.
(2) Multipoint (up to 8 points) thermocouples and RTDs are available for purchase with the Rosemount 848T. Input ranges and accuracy for these sensors will
depend on the specific multipoint sensor chosen. For more information, contact your local Emerson representative.
X = Sensor A minimum - Sensor B max.
Y = Sensor A maximum - Sensor B min.