SCC-TC Series Thermocouple Input Modules User Guide
12
ni.com
Measurement Accuracy
1
Cold-Junction Sensor
Cold-junction sensor accuracy
................±
0.4
°
C max from 15 to 35
°
C,
±
0.75
°
C max from 0 to 15
°
C
and 35 to 55
°
C
Output .....................................................1.91 V (0
°
C) to 0.58 V (55
°
C)
1
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
µ
V. SCC-TC01/02 accuracy specification of 0.08%
±
5
µ
V, 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
K
–200 to –100
–100 to 600
600 to 1,200
2.5
1.25
2
1.25
0.67
0.45
N
–200 to –100
–100 to 1,300
2.5
2
2
0.7
R
–50 to 0
0 to 100
100 to1,600
3
2
1.75
1.24
0.82
0.4
S
–50 to 0
0 to 1,400
1,400 to 1,600
3
2
2.5
1.3
1
1
T
–200 to –100
–100 to 400
2.5
1
2
0.9
