National Instruments USB-6001 User Manual

12 | ni.com | NI USB-6001/6002/6003 User Guide
Analog Input Modes
You can configure the analog input channels on the NI DAQ device to take up to four differential
(DIFF) or eight referenced single-ended (RSE) measurements.
• Differential mode—In DIFF mode, the NI DAQ device measures the difference in voltage
between two AI signals.
• Referenced single-ended mode—In RSE mode, the NI DAQ device measures the voltage
of an AI signal relative to AI GND.
Analog input modes are programmed on a per-channel basis. For example, you can configure
the device to scan two channels in differential mode and four channels on single-ended mode.
The AI settings determine how you connect your AI signals to the NI DAQ device.
Taking Differential Measurements
For differential signals, connect the positive lead of the voltage signal or source to the
AI+ terminal, and the negative lead to the AI- terminal.
Figure 6. Connecting a Differential Voltage Signal
Figure 7. Example of a Differential ±10 V Measurement
AI+
DAQ Device
AI–
Voltage
Source
–5
–10
10
5
0
Amplitude (V)
AI 1
AI 5
Result

National Instruments USB-6001 Specifications

General

Brand	National Instruments
Model	USB-6001
Category	I/O Systems
Language	English