Emerson Rosemount - A.3 FOUNDATION fieldbus specifications; Power supply; Transient protection (option code T1); Local display

195
Reference Manual
00809-0100-4021, Rev GC
Appendix A: Reference Data
April 2014
Reference data
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.
Digital accuracy for differential configurations (dual-sensor
option, HART only)
 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.
Sensor options Sensor reference Input ranges
Minimum
span
(9)
Digital
accuracy
(10)
Enhanced
accuracy
(11)
D/A
accuracy
(12)(13)
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) Enhanced accuracy can be ordered using the P8 Model Code.
(4) Total Analog accuracy is the sum of digital and D/A accuracies.
(5) Applies to HART / 4-20 mA devices.
(6) Total digital accuracy for thermocouple measurement: sum of digital accuracy +0.25 °C (0.45 °F) (cold junction accuracy).
(7) Digital accuracy for NIST Type B is ±3.0 °C (±5.4 °F) from 100 to 300 °C (212 to 572 °F).
(8) Digital accuracy for NIST Type K is ±0.50 °C (±0.9 °F) from –180 to –90 °C (–292 to –130 °F).
(9) No minimum or maximum span restrictions within the input ranges. Recommended minimum span will hold noise within accuracy specification with damping at zero
seconds.
(10) Digital accuracy: Digital output can be accessed by the Field Communicator.
(11) Enhanced accuracy can be ordered using the P8 Model Code.
(12) Total Analog accuracy is the sum of digital and D/A accuracies.
(13) Applies to HART / 4-20 mA devices.
TotalSystemAccuracy TransmitterAccuracy
2
SensorAccuracy
2
+=