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© National Instruments Corp. 15 NI 9225E Operating Instructions and Specifications
Accuracy
Input noise ........................................2 mV
rms
Stability
Gain drift ....................................±10 ppm/°C
Offset drift..................................±970 μV/°C
Post calibration gain match
(ch-to-ch, 20 kHz).............................±0.25 dB max
Measurement Conditions
Percent of
Reading
(Gain Error)
Percent of
Range
*
(Offset Error)
Calibrated max (–40 to 70 °C) ±0.23% ±0.05%
Calibrated typ (25 °C, ±5 °C) ±0.05% ±0.008%
Calibrated max (25 °C, ±15 °C) ±0.084% ±0.016%
Uncalibrated max (–40 to 70 °C) ±1.6% ±0.66%
Uncalibrated typ (25 °C, ±5 °C) ±0.4% ±0.09%
*
Range equals 425 V.