Reference Manual
00809-0100-4021, Rev FB
August 2011
Rosemount 3144P
A-4
Accuracy
Reference Accuracy Example (HART only)
When using a Pt 100 (= 0.00385) sensor input with a 0 to 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.
Differential Capability Exists Between Any Two Sensor Types
(dual-sensor option)
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.
Sensor Options Sensor Reference Input Ranges
Minimum
Span
(1)
Digital
Accuracy
(2)
D/A
Accuracy
(3)(4)
2-, 3-, 4-wire RTDs °C °F °C °F °C °F
Pt 100 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 10 18 ± 0.10 ± 0.18 ±0.02% of span
Pt 200 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 10 18 ± 0.22 ± 0.40 ±0.02% of span
Pt 500 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 10 18 ± 0.14 ± 0.25 ±0.02% of span
Pt 1000 ( = 0.00385) IEC 751 –200 to 300 –328 to 572 10 18 ± 0.10 ± 0.18 ±0.02% of span
Pt 100 ( = 0.003916) JIS 1604 –200 to 645 –328 to 1193 10 18 ± 0.10 ± 0.18 ±0.02% of span
Pt 200 ( = 0.003916) JIS 1604 –200 to 645 –328 to 1193 10 18 ± 0.22 ± 0.40 ±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
Pt 50 (=0.00391) GOST 6651-94 –200 to 550 –328 to 1022 10 18 ±0.20 ±0.36 ±0.02% of span
Pt 100 (=0.00391) GOST 6651-94 –200 to 550 –328 to 1022 10 18 ±0.10 ±0.18 ±0.02% of span
Cu 50 (=0.00426) GOST 6651-94 –50 to 200 –58 to 392 10 18 ±0.34 ±0.61 ±0.02% of span
Cu 50 (=0.00428) GOST 6651-94 –185 to 200 –301 to 392 10 18 ±0.34 ±0.61 ±0.02% of span
Cu 100 (=0.00426) GOST 6651-94 –50 to 200 –58 to 392 10 18 ±0.17 ±0.31 ±0.02% of span
Cu 100 (=0.00428) GOST 6651-94 –185 to 200 –301 to 392 10 18 ±0.17 ±0.31 ±0.02% of span
Thermocouples
(5)
Type B
(6)
NIST Monograph 175, IEC 584 100 to 1820 212 to 3308 25 45 ± 0.75 ± 1.35 ±0.02% of span
Type E NIST Monograph 175, IEC 584 –50 to 1000 –58 to 1832 25 45 ± 0.20 ± 0.36 ±0.02% of span
Type J NIST Monograph 175, IEC 584 –180 to 760 –292 to 1400 25 45 ± 0.25 ± 0.45 ±0.02% of span
Type K
(7)
NIST Monograph 175, IEC 584 –180 to 1372 –292 to 2501 25 45 ± 0.25 ± 0.45 ±0.02% of span
Type N NIST Monograph 175, IEC 584 –200 to 1300 –328 to 2372 25 45 ± 0.40 ± 0.72 ±0.02% of span
Type R NIST Monograph 175, IEC 584 0 to 1768 32 to 3214 25 45 ± 0.60 ± 1.08 ±0.02% of span
Type S NIST Monograph 175, IEC 584 0 to 1768 32 to 3214 25 45 ± 0.50 ± 0.90 ±0.02% of span
Type T NIST Monograph 175, IEC 584 –200 to 400 –328 to 752 25 45 ± 0.25 ± 0.45 ±0.02% of span
DIN Type L DIN 43710 –200 to 900 –328 to 1652 25 45 ± 0.35 ± 0.63 ±0.02% of span
DIN Type U DIN 43710 –200 to 600 –328 to 1112 25 45 ± 0.35 ± 0.63 ±0.02% of span
Type W5Re/W26Re ASTM E 988-96 0 to 2000 32 to 3632 25 45 ± 0.70 ± 1.26 ±0.02% of span
GOST Type L GOST R 8.585-2001 –200 to 800 –328 to 1472 25 45 ± 0.25 ± 0.45 ±0.02% of span
Other Input Types
Millivolt Input –10 to 100 mV 3 mV ±0.015 mV ±0.02% of span
2-, 3-, 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 specification with damping at
zero seconds.
(2) Digital accuracy: Digital output can be accessed by the Field Communicator.
(3) Total Analog accuracy is the sum of digital and D/A accuracies.
(4) Applies to HART / 4-20 mA devices.
(5) Total digital accuracy for thermocouple measurement: sum of digital accuracy +0.25 °C (0.45 °F) (cold junction accuracy).
(6) Digital accuracy for NIST Type B is ±3.0 °C (±5.4 °F) from 100 to 300 °C (212 to 572 °F).
(7) Digital accuracy for NIST Type K is ±0.50 °C (±0.9 °F) from –180 to –90 °C (–292 to –130 °F).
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