Allen-Bradley 1756-IR12 - Module Error at 25 C (77 F)

36 Rockwell Automation Publication 1756-UM540E-EN-P - December 2017
Chapter 2 Analog I/O Module Features
• Application temperature, that is, the temperature of the physical location
where the thermocouple is being used.
Module Error at 25 °C (77 °F)
Table 5 lists the 1756-IRT8I module error at 25 °C (77 °F) when using a
thermocouple input type.
EXAMPLE
When a 1756-IRT8I or 1756-IT16 module is used with a thermocouple input
type in the following conditions, module error at
25 °C (77 °F) is ±3.74 °C (38.73 °F):
• Connected to a type S thermocouple
• Application temperature of 1200 °C (2192 °F)
In other words, the difference between the temperature the module
reports and the actual application temperature can be ±3.74 °C (38.73 °F).
The module can report an application temperature of 1200 °C (2192 °F) in
this case when the actual temperature can be in the range from
1196.26…1203.74 °C (2185.268…2198.732 °F).
These calculations used a typical error of 0.02% of full scale range.
Table 5 - 1756-IRT8I Module Error At 25 °C (77 °F) with Thermocouple Input Type
(1)
Application
Temperature
Module Error (+/-) at 25 °C (77 °F) When Connected to Thermocouple Types
Type B Type C Type D Type TXK/
XK(L)
Type R Type S Type E Type J Type K Type N Type T
-200 °C (-328 °F)———1.65 °C——1.79 °C2.06 °C2.95 °C4.53 °C2.86 °C
0 °C (32 °F) — 3.46 °C 4.59 °C 0.93 °C 8.51 °C 8.33 °C 0.77 °C 0.89 °C 1.14 °C 1.72 °C 1.16 °C
200 °C (392 °F) — 2.65 °C 2.83 °C 0.71 °C 5.09 °C 5.32 °C 0.61 °C 0.81 °C 1.13 °C 1.36 °C 0.85 °C
400 °C (752 °F) 11.08 °C 2.37 °C 2.36 °C 0.62 °C 4.34 °C 4.70 °C 0.56 °C 0.82 °C 1.07 °C 1.21 °C 0.73 °C
600 °C (1112 °F) 7.56 °C 2.37 °C 2.22 °C 0.56 °C 3.96 °C 4.41 °C 0.56 °C 0.77 °C 1.06 °C 1.16 °C —
800 °C (1472 °F) 5.89 °C 2.37 °C 2.20 °C 0.51 °C 3.65 °C 4.14 °C 0.57 °C 0.70 °C 1.10 °C 1.15 °C —
1000 °C (1832 °F) 4.93 °C 2.37 °C 2.25 °C — 3.40 °C 3.90 °C 0.60 °C 0.76 °C 1.15 °C 1.17 °C —
1200 °C (2192 °F) 4.35 °C 2.65 °C 2.36 °C — 3.23 °C 3.74 °C — 0.79 °C 1.23 °C 1.21 °C —
1400 °C (2552 °F) 3.99 °C 2.81 °C 2.47 °C — 3.18 °C 3.71 °C — — 1.33 °C — —
1600 °C (2912 °F)3.85 °C3.00 °C2.63 °C—3.24 °C3.80 °C—————
1800 °C (3272 °F)3.92 °C3.46 °C2.85 °C—3.67 °C4.36 °C—————
2000 °C (3632 °F)—3.75 °C3.19 °C————————
2200 °C (3992 °F)—4.09 °C3.95 °C————————
(1) This table represents +/-.02% typical error while the maximum stated error is +/- 0.05%.