©
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
μ
V/°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.
