Emerson Rosemount 644 HART, Reference Manual

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87
Specifications and Reference Data
Specifications and Reference Data
July 2016
Reference Manual
00809-0100-4728, Rev MB
Accuracy example
When using a Pt 100 (

= 0.00385) sensor input with a 0 to 100 °C
span:

Digital accuracy = ±0.15 °C

D/A accuracy = ±0.03% of 100 °C or ±0.03 °C

Total accuracy = ±0.18 °C.
Type J
NIST Monograph
175, IEC 584
–180 to 760 –292 to 1400 25 45 ± 0.35 ± 0.63 ±0.03% of span
Type K
(6)
NIST Monograph
175, IEC 584
–180 to 1372 –292 to 2501 25 45 ± 0.50 ± 0.90 ±0.03% of span
Type N
NIST Monograph
175, IEC 584
–200 to 1300 –328 to 2372 25 45 ± 0.50 ± 0.90 ±0.03% of span
Type R
NIST Monograph
175, IEC 584
0 to 1768 32 to 3214 25 45 ± 0.75 ± 1.35 ±0.03% of span
Type S
NIST Monograph
175, IEC 584
0 to 1768 32 to 3214 25 45 ± 0.70 ± 1.26 ±0.03% of span
Type T
NIST Monograph
175, IEC 584
–200 to 400 –328 to 752 25 45 ± 0.35 ± 0.63 ±0.03% of span
DIN Type L DIN 43710 –200 to 900 –328 to 1652 25 45 ± 0.35 ± 0.63 ±0.03% of span
DIN Type U DIN 43710 –200 to 900 –328 to 1112 25 45 ± 0.35 ± 0.63 ±0.03% of span
Type W5Re/W26Re ASTM E 988-96 0 to 2000 32 to 3632 25 45 ± 0.70 ± 1.26 ±0.03% of span
GOST Type L
GOST R
8.585-2001
–200 to 800 –328 to 1472 25 45 ± 1.00 ± 1.26 ±0.03% of span
Other input types
Millivolt Input –10 to 100 mV ±0.015 mV ±0.03% of span
2-, 3-, 4-wire Ohm Input 0 to 2000 ohms ±0.45 ohm ±0.03% 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. The published digital accuracy applies over the entire sensor input range. Digital output can be accessed by HART or F
OUNDATION
™
Fieldbus Communications or
Rosemount control system.
3. Total analog accuracy is the sum of digital and D/A accuracies. This is not applicable for F
OUNDATION
Fieldbus.
4. Total digital accuracy for thermocouple measurement: sum of digital ac0.5 °C. (cold junction accuracy).
5. Digital accuracy for NIST Type B T/C is ±3.0 °C (±5.4 °F) from 100 to 300 °C (212 to 572 °F).
6. Digital accuracy for NIST Type K T/C is ±0.70 °C (±1.26 °F) from –180 to –90 °C (–292 to –130 °F).
Table A-2. Rosemount 644 Input Options and Accuracy
Sensor
options
Sensor
reference
Input
ranges
Recommended
Min. Span
(1)
Digital
accuracy
(2)
D/A
accuracy
(3)