user manual

© National Instruments Corporation 11 USB-9201/9221 User Guide and Specifications
Sample rate (aggregate)
1
USB-9201
Single channel.......................... 800 kS/s max
Scanning .................................. 500 kS/s
USB-9221 ....................................... 800 kS/s max
Operating voltage ranges
2
USB-9201 ....................................... ±10 V (not software selectable)
USB-9221 ....................................... ± 60 V (not software selectable)
Maximum voltage, (AI or COM to earth ground, verified by a dielectric
withstand test)
Screw terminal ................................ 250 V
rms
DSUB.............................................. ±60 VDC
Isolation voltage (AI or COM to earth ground, verified by a dielectric
withstand test)
Screw terminal ................................ 2,300 V
rms
DSUB.............................................. 1,000 V
rms
Overvoltage protection
(AI to COM)........................................... ±100 V
Accuracy
3
1
Full performance requires the use of a USB 2.0 high-speed host controller and USB 2.0 hubs.
2
Refer to the Safety section for details about safe operating voltages.
3
Excludes noise.
Error
Percent of
Reading
Percent of
Range*
USB-9201
Calibrated typ (25 °C, ±5°C) ±0.04% ± 0.07%
Calibrated max (0 to 60 °C) ±0.25% ± 0.25%
Uncalibrated typ (25 °C, ±5°C) ±0.26% ± 0.46%
Uncalibrated max (0 to 60 °C) ±0.67% ±1.25%
USB-9221
Calibrated typ (25 °C, ±5°C) ±0.04% ±0.07%
Calibrated max (0 to 60 °C) ±0.25% ±0.25%