Rockwell Automation 1769-IT6 Compact I/O 1769-IT6 Thermocouple/mV Input Module User Manual
Page 86
86
Rockwell Automation Publication 1769-UM004B-EN-P - March 2010
Appendix A Specifications
Table 15 - Accuracy
Input Type
(1)
With Autocalibration Enabled
Without Autocalibration
Accuracy
(2)
(3)
for 10 Hz, 50 Hz, and 60 Hz
Filters, max
Temperature Drift, max
(2)
(4)
At 25 °C (77 °F)
Ambient
At 0…60 °C
(32…140 °F)
Ambient
At 0…60 °C (32…140 °F) Ambient
Thermocouple J (-210…1200 °C (-346…2192 °F))
±0.6 °C (± 1.1 °F)
±0.9 °C (± 1.7 °F)
±0.0218 °C/°C (±0.0218 °F/°F)
Thermocouple N (-200…1300 °C (-328…2372 °F))
±1 °C (± 1.8 °F)
±1.5 °C (±2.7 °F)
±0.0367 °C/°C (±0.0367 °F/°F)
Thermocouple N (-210…-200 °C (-346…-328 °F))
±1.2 °C (±2.2 °F)
±1.8 °C (±3.3 °F)
±0.0424 °C/°C (±0.0424 °F/°F)
Thermocouple T (-230…400 °C (-382…752 °F))
±1 °C (± 1.8 °F)
±1.5 °C (±2.7 °F)
±0.0349 °C/°C (±0.0349 °F/°F)
Thermocouple T (-270…-230 °C (-454…-382 °F))
±5.4 °C (± 9.8 °F)
±7.0 °C (±12.6 °F)
±0.3500 °C/°C (±0.3500 °F/°F)
Thermocouple K (-230…1370 °C (-382…2498 °F))
±1 °C (± 1.8 °F)
±1.5 °C (±2.7 °F)
±0.4995 °C/°C (±0.4995 °F/°F)
Thermocouple K (-270…-225 °C (-454…-373 °F))
±7.5 °C (± 13.5 °F)
±10 °C (±18 °F)
±0.0378 °C/°C (±0.0378 °F/°F)
Thermocouple E (-210…1000 °C (-346…1832 °F))
±0.5 °C (± 0.9 °F)
±0.8 °C (±1.5 °F)
±0.0199 °C/°C (±0.0199 °F/°F)
Thermocouple E (-270…-210 °C (-454…-346 °F))
±4.2 °C (± 7.6 °F)
±6.3 °C (±11.4 °F)
±0.2698 °C/°C (±0.2698 °F/°F)
Thermocouple R
±1.7 °C (± 3.1 °F)
±2.6 °C (± 4.7 °F)
±0.0613 °C/°C (±0.0613 °F/°F)
Thermocouple S
±1.7 °C (± 3.1 °F)
±2.6 °C (± 4.7 °F)
±0.0600 °C/°C (±0.0600 °F/°F)
Thermocouple C
±1.8 °C (±3.3 °F)
±3.5 °C (±6.3 °F)
±0.0899 °C/°C (±0.0899 °F/°F)
Thermocouple B
±3.0 °C (±5.4 °F)
±4.5 °C (±8.1°F)
±0.1009 °C/°C (±0.1009 °F/°F)
±50 mV
±15 µV
±25 µV
±0.44 µV/°C (±0.80 µV/°F)
±100 mV
±20 µV
±30 µV
±0.69 µV/°C (±01.25 µV/°F)
(1)
The module uses the National Institute of Standards and Technology (NIST) ITS-90 standard for thermocouple linearization.
(2)
Accuracy and temperature drift information does not include the affects of errors or drift in the cold junction compensation circuit.
(3)
Accuracy is dependent upon the analog/digital converter output rate selection, data format, and input noise.
(4)
Temperature drift with autocalibration is slightly better than without autocalibration.
TIP
For more detailed accuracy and drift information, see the accuracy
graphs on
page 87
through
and the temperature drift graphs on
page 105
through
page 109
.