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Nominal
Range
(V)
% of Reading
Full
Scale
24 Hours
±50
0.346
±20
0.271
±10
0.026
±5
0.016
±2
0.036
±1
0.043
±0.5
0.058
±0.2
0.103
Nominal
Range
(V)
% of Reading
Full
24
Scale
Hours
±50
0.157
±20
0.139
±10
0.033
±5
0.036
±2
0.039
±1
0.077
±0.5
0.100
±0.2
0.123
1
Accuracies are valid for measurements following an internal calibration. Averaged numbers assume dithering and
averaging of 100 single-channel readings. Measurement accuracies are listed for operational temperatures within ±1 °C
of internal calibration temperature and ±10 °C of external or factory-calibration temperature.
2
The offset might degrade by 3 LSB with filter enabled.
3
The offset might degrade by 1 LSB when sampling above 500 kS/s.
© National Instruments Corporation
Table A-1. NI 6115 Analog Input DC Accuracy Information
Absolute Accuracy
Quantization (mV)
Offset
Single
1 Year
(mV)
Pt.
0.348
33
42
0.273
13
17
0.028
6.7
8.3
0.018
3.4
4.2
0.038
1.3
1.8
0.045
0.68
1.1
0.060
0.35
0.69
0.105
0.15
0.43
Table A-2. NI 6120 Analog Input DC Accuracy Information
Absolute Accuracy
Noise + Quantization
Offset
Single
2,3
1 Year
(µV)
Pt.
0.159
7,799.2
5,621.9
0.141
3,120.7
2,248.7
0.034
1,561.1
1,124.4
0.37
781.4
562.2
0.041
344.0
224.9
0.079
264.4
150.0
0.102
178.8
144.3
0.125
90.8
112.8
Noise +
Temp
Drift
Averaged
(%/°C)
3.6
0.0229
1.4
0.0229
0.72
0.0004
0.36
0.0004
0.16
0.0004
0.09
0.0004
0.061
0.0004
0.039
0.0004
(µV)
Temp
Drift
Averaged
(%/°C)
503.5
0.0106
201.4
0.0106
100.7
0.0006
50.4
0.0006
20.1
0.0006
13.7
0.0006
13.7
0.0006
11.0
0.0006
A-3
Appendix A
Specifications
Relative Accuracy
Absolute
Resolution (mV)
Accuracy at
Full Scale
Single
(±mV)
Pt.
211.0
48
69.4
19
10.22
10
4.61
4.8
2.26
2.1
1.23
1.2
0.71
0.80
0.39
0.51
1
Relative Accuracy
Absolute
Accuracy
Resolution (µV)
at Full
Scale
Single
(±mV)
Pt.
86.92
6,629.9
31.11
2652.0
4.94
1326.0
2.61
663.0
1.15
265.2
1.05
180.8
0.69
180.8
0.35
144.7
NI 6115/6120 User Manual
Averaged
4.8
1.9
1.0
0.48
0.21
0.12
0.080
0.051
Averaged
663.0
265.2
132.6
66.3
26.5
18.1
18.1
14.5
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