Table A-1. Rtd Measurement Accuracy - National Instruments Module SCXI-1503 User Manual

Appendix A Specifications
Measured
Temperature C
–100 to 0
0 to 25
25 to 100
100 to 500
500 to 1200
Notes: The accuracies in this table reflect using the module in4-wire mode. They do not include errors from the RTD
including lead-wire errors when using 2- or 3-wire connection.
The accuracies assume auto-zero is enabled and the environmental conditions are 25 C ±10 C over a one year period.
These accuracies were computed using a standard RTD with a TCR of 3851.
1
Assumes 1,000 point average, 25 C ±10 C over one year.
2
Assumes 1,000 point average, ±1 C of autozero temperature.
SCXI-1503 User Manual
Gain = 100
Calibrated
With autozero enabled
Gain error (relative to calibration reference)
Gain = 1 or 100
Calibrated
RTD Measurement Accuracy

Table A-1. RTD Measurement Accuracy

100 Max C 100
0.60
0.62
0.69
1.11
2.06
Amplifier Characteristics
Input coupling.........................................DC
Input impedance
Normal powered on .........................>1 G
Input bias current ....................................±
1
................................±25 V max
±10 V typ
2
............±10 V max
±5 V typ
1
................................0.074% of reading max
0.02% of reading typ
Typ C 1000
0.23
0.23
0.25
0.37
0.65
A-2
Max C 1000
1.09 0.46
1.11 0.47
1.20 0.49
1.68 0.65
2.81 1.04
nA
Typ C
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