Rosemount Models 3144 and 3244MV Smart Temperature Transmitters
5-10
REFERENCE DATA
Reference Accuracy Example
When using a Pt 100 (α = 0.00385) sensor input with a 0–100 °C span:
Digital Accuracy would be ±0.10 °C, D/A accuracy would be ±0.02% of
100 °C or ±0.02 °C, Total = ±0.12 °C.
Additional Notes for Model
3244MV Transmitters
NOTE 1: DIFFERENTIAL CAPABILITY EXISTS BETWEEN ANY TWO
SENSOR TYPES
For all differential configurations, the input range is X to +Y where
X = Sensor 1 minimum – Sensor 2 maximum and
Y = Sensor 1 maximum – Sensor 2 minimum.
NOTE 2: DIGITAL ACCURACY FOR DIFFERENTIAL
CONFIGURATIONS
Sensor types are similar (e.g., both RTDs or both T/Cs):
Digital Accuracy = 1.5 times worst case accuracy of either sensor type.
Sensor types are dissimilar (e.g., one RTD, one T/C):
Digital Accuracy = Sensor 1 Accuracy + Sensor 2 Accuracy
TABLE 5-1. Models 3144 and 3244MV Input Options and Accuracy.
Sensor Options Sensor Reference Input Ranges
Recommeded
Min. Span
(1)
Digital
Accuracy
(2)
D/A Acuracy
(3)
2, 3, or 4 Wire RTDs °C °F °C °F °C °F
Pt 100 IEC 751; α = 0.00385 (ITS–90) 1995 –200 to 850 –328 to 1562 10 18 ±0.10 ±0.18 ±0.02% of span
Pt 100 JIS 1604;
α =0.003916 1981 –200 to 645 –328 to 1193 10 18 ±0.10 ±0.18 ±0.02% of span
Pt 200 IEC 751;
α = 0.00385 (ITS–90) 1995 –200 to 850 –328 to 1562 10 18 ±0.22 ±0.40 ±0.02% of span
Pt 500 IEC 751;
α = 0.00385 (ITS–90) 1995 –200 to 850 –328 to 1562 10 18 ±0.14 ±0.25 ±0.02% of span
Pt 1000 IEC 751;
α = 0.00385 (ITS–90) 1995 –200 to 300 –328 to 572 10 18 ±0.10 ±0.18 ±0.02% of span
Ni 120 Edison Curve No.7 –70 to 300 –94 to 572 10 18 ±0.08 ±-0.14 ±0.02% of span
Cu 10 Edison Copper Winding No. 15 –50 to 250 –58 to 482 10 18 ±1.00 ±1.80 ±0.02% of span
NOTE: Using Pt 100 (
α
= 0.003916) and Pt 1000 (
α
= 0.00385) RTDs may require you to update your Model 275 HART Communicator. If you
order the transmitter preconfigured with the new sensor input types, your Model 275 HART Communicator must contain the appropriate device
descriptor in order to establish communications. Refer to Appendix B: Model 275 HART Communicator for more information.
Thermocouples
(4)
°C °F °C °F °C °F
NIST Type B
(5)
NIST Monograph 175 100 to 1820 212 to 3308 25 45 ±0.75 ±1.35 ±0.02% of span
NIST Type E NIST Monograph 175 –50 to 1000 –58 to 1832 25 45 ±0.20 ±0.36 ±0.02% of span
NIST Type J NIST Monograph 175 –180 to 760 –292 to 1400 25 45 ±0.25 ±0.45 ±0.02% of span
NIST Type K
(6)
NIST Monograph 175 –180 to 1372 –292 to 2502 25 45 ±0.25 ±0.45 ±0.02% of span
NIST Type N NIST Monograph 175 0 to 1300 32 to 2372 25 45 ±0.40 ±0.72 ±0.02% of span
NIST Type R NIST Monograph 175 0 to 1768 32 to 3214 25 45 ±0.60 ±1.08 ±0.02% of span
NIST Type S NIST Monograph 175 0 to 1768 32 to 3214 25 45 ±0.50 ±0.90 ±0.02% of span
NIST Type T NIST Monograph 175 –200 to 400 –328 to 752 25 45 ±0.25 ±0.45 ±0.02% of span
Millivolt Input
(7)
–10 to 100 mV 3 mV ±0.015 mV ±0.02% of span
2, 3, or 4 Wire Ohm Input
0 to 2000 ohms 20 ohm ±0.35 ohm ±0.02% of span
(1) No minimum or maximum span restrictions within the input ranges. Recommended minimum span will hold noise within accuracy
specifications with damping at zero seconds.
(2) Digital Accuracy: Digital output can be accessed by a HART communicator or a HART-based control system.
(3) Total Analog Accuracy is the sum of digital and D/A accuracies.
(4) Total Digital Accuracy for thermocouple only: sum of Digital Accuracy + 0.25 °C (cold junction accuracy).
(5) Digital Accuracy for NIST Type B T/C is ±2.0 °C (5.4 °F) from 100 to 300 °C (212 to 572 °F).
(6) Digital Accuracy for NIST Type K T/C is ±0.5 °C (0.9 °F) from –180 to –90 °C (–292 to –130 °F).
(7) Millivolt inputs are not approved for use with CSA Option Code I6.
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