Rockwell Automation Publication 1756-UM540E-EN-P - December 2017 73
Temperature-sensing Analog Modules Chapter 4
1756-IRT8I Thermocouple Wire Length Compensation
Wires that connect a thermocouple to the module have an intrinsic resistance
that can negatively impact the accuracy of the module. The wire length and gauge
are directly related to resistance level and, by extension, to impact on the module
accuracy. The longer the wire length, the greater the resistance, the greater the
possible negative impact on module accuracy.
Thermocouple (mV) TC Type B 21…1820 °C (68…3308 °F)
293…2093 °K
528…3768 °R
TC Type C 0…2320 °C (32…4208 °F)
273…2593 °K
492…4668 °R
TC Type D 0…2320 °C (32…4208 °F)
273…2593 °K
492…4668 °R
TC Type E -270…1000 °C (-454…1832 °F)
3…1273 °K
6…2292 °R
TC Type J -210…1200 °C (-346…2192 °F)
63…1473 °K
114…2652 °R
TC Type K -270…1372 °C (-454…2502 °F)
3…1645 °K
6…2961 °R
TC Type N -270…1300 °C (-454…2372 °F)
3…1573 °K
6…2832 °R
TC Type R -50…1768 °C (-58…3215 °F)
223…2041 °K
402…3674 °R
TC Type S -50…1768 °C (-58…3215 °F)
223…2041 °K
402…3674 °R
TC Type T -270…400 °C (-454…752 °F)
3…673 °K
6…1212 °R
TC Type TXK/XK (L) -200…800 °C (-328…1472 °F)
73…1073 °K
132…1932 °R
Table 18 - Temperature Limits for RTD and Thermocouple Sensor Types
Input Type Sensor Type Temperature Range Limits
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