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 Ac 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 Ac 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.
