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SCC-TC Series Thermocouple Input Modules User Guide 14 ni.com
Amplifier Characteristics
Open thermocouple detection current.....250 nA max
1
(assuming floating thermocouple)
Common-mode rejection ratio................110 dB min
1
Output range ...........................................±10 V max
1
Transfer Characteristics
Gain ........................................................100
Gain error................................................±0.08% max
1
Gain stability...........................................±0.0005%/°C max
2
Offset error .............................................±5 µV max (post calibration)
1
Offset stability ........................................±0.6 µV/°C max
2
Nonlinearity ............................................±0.004% max
1
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%
±5 µV, 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)
Typical
Inaccuracy (±°C)
B 400 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