SCC-TC Series Thermocouple Input Modules User Guide 14 ni.com
Amplifier Characteristics
Open thermocouple detection current.....250 nA max1
(assuming floating thermocouple)
Common-mode rejection ratio................110 dB min1
Output range...........................................±10 V max1
Transfer Characteristics
Gain........................................................100
Gain error................................................±0.08% max1
Gain stability...........................................±0.0005%/°C max2
Offset error.............................................±5 µV max (post calibration)1
Offset stability........................................±0.6 µV/°C max2
Nonlinearity............................................±0.004% max1
Recommended warm-up time.................5 minutes
Measurement Accuracy 3
1 Temperature range is 23 °C ±5 °C.
2 Temperature range is 0 to 50 °C.
3 Total system measurement error for operating temperature within ±5 °C of calibration temperature. Includes
PCI/AT-MIO-16XE-50 one-year accuracy specification of 0.01% ±412 µV. SCC-TC01/02 accuracy specification of 0.08%
±5µV, and reference junction measurement accuracy of 0.5 °C. Assumes averaging. Non-averaged, single-point reading has
an additional uncertainty (up to ±0.1 °C for J-type thermocouple).
Thermocouple
Type
Temperature
Range (°C)
Maximum
Inaccuracy (±°C)
Typic al
Inaccuracy (±°C)
B400 to 600
600 to 1,800
2.5
2
0.31
0.13
E–200 to –100
–100 to 600
600 to 1,000
2
1
1.5
1.76
1
0.6
J–200 to –100
–100 to 500
500 to 1,100
2
1
1.5
1.6
0.9
0.72