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© National Instruments Corp. 21 NI 9229/9239
Accuracy, NI 9239
Input noise
NI 9229.......................................320 μV
rms
NI 9239.......................................70 μV
rms
Stability
Gain drift ....................................±5 ppm/°C
Offset drift
NI 9229 ................................±150
μV/°C
NI 9239 ................................±26
μV/°C
Measurement Conditions
Percent of
Reading
(Gain Error)
Percent of
Range
*
(Offset Error)
Calibrated max (–40 to 70 °C) ±0.13% ±0.06%
Calibrated typ (25 °C, ±5 °C) ±0.03% ±0.008%
Uncalibrated max (–40 to 70 °C) ±1.4% ±0.70%
Uncalibrated typ (25 °C, ±5 °C) ±0.3% ±0.11%
*
Range equals 10.52 V