Allen-Bradley 1756-IR12 - Page 37

Rockwell Automation Publication 1756-UM540E-EN-P - December 2017 37
Analog I/O Module Features Chapter 2
Table 6 lists the 1756-IT16 module error at 25 °C (77 °F) when using a
thermocouple input type.
Table 6 - 1756-IT16 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)———3.30 °C——3.58 °C4.12 °C5.90 °C9.06 °C5.72 °C
0 °C (32 °F) — 6.92 °C 9.18 °C 1.86 °C 17.02 °C 16.66 °C 1.54 °C 1.78 °C 2.28 °C 3.44 °C 2.32 °C
200 °C (392 °F) — 5.30 °C 5.66 °C 1.42 °C 10.18 °C 10.64 °C 1.22 °C 1.62 °C 2.26 °C 2.72 °C 1.70 °C
400 °C (752 °F) 22.16 °C 4.74 °C 4.72 °C 1.24 °C 8.68 °C 9.40 °C 1.12 °C 1.64 °C 2.14 °C 2.42 °C 1.46 °C
600 °C (1112 °F) 15.12 °C 4.74 °C 4.44 °C 1.12 °C 7.92 °C 8.82 °C 1.12 °C 1.54 °C 2.12 °C 2.32 °C —
800 °C (1472 °F) 11.78 °C 4.74 °C 4.40 °C 1.02 °C 7.30 °C 8.28 °C 1.14 °C 1.40 °C 2.20 °C 2.30 °C —
1000 °C (1832 °F) 9.86 °C 4.74 °C 4.50 °C — 6.80 °C 7.80 °C 1.20 °C 1.52 °C 2.30 °C 2.34 °C —
1200 °C (2192 °F) 8.70 °C 5.30 °C 4.72 °C — 6.46 °C 7.48 °C — 1.58 °C 2.46 °C 2.42 °C —
1400 °C (2552 °F) 7.98 °C 5.62 °C 4.94 °C — 6.36 °C 7.42 °C — — 2.66 °C — —
1600 °C (2912 °F)7.70 °C6.00 °C5.26 °C—6.48 °C7.60 °C—————
1800 °C (3272 °F)7.84 °C6.92 °C5.70 °C—7.34 °C8.72 °C—————
2000 °C (3632 °F)—7.50 °C6.38 °C————————
2200 °C (3992 °F)—8.18 °C7.90 °C————————
(1) This table represents +/-.04% typical error while the maximum stated error is +/- 0.10%.
IMPORTANT
When calculating total measurement error, module error at 25 °C (77 °F) is only
one factor in deriving the total measurement error budget.
Other factors that impact thermocouple measurement error include
the following:
• Thermocouple sensor accuracy/error
• Conditions of thermocouple wire, such as wire length
• Cold junction compensation values