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NI 9205/9206 Calibration Procedure
12
ni.com
AI Absolute Accuracy Tables and Formulas
The values in the following tables are based on calibrated scaling
coefficients, which are stored in the onboard EEPROM. The following
calibration specifications are for 23 ±10 °C.
Table 2.
Accuracy Summary
Nominal Range (V)
Absolute Accuracy
at Full Scale
1
(
μ
V)
Random Noise,
σ
(
μ
Vrms)
Sensitivity
2
(
μ
V)
±10
3230
240
96.0
±5
1730
116
46.4
±1
390
26
10.4
±0.2
114
10
4.0
1
Absolute accuracy values at full scale on the analog input channels assume the device is operating within 10 °C of the last
external calibration and are valid for averaging 100 samples immediately following internal calibration.
2
Sensitivity is the smallest voltage change that can be detected. It is a function of noise.
Table 3.
Accuracy Details
Nominal
Range (V)
Residual
Gain
Error
(ppm of
Reading)
Gain
Tempco
(ppm/°C)
Reference
Tempco
Residual
Offset
Error
(ppm of
Range)
Offset
Tempco
(ppm of
Range/°C)
INL Error
(ppm of
Range)
±10
115
11
5
20
44
76
±5
135
11
5
20
47
76
±1
155
11
5
25
66
76
±0.2
215
11
5
40
162
76