Keysight Technologies U2300A Serie Guia Del Usuario página 37

The following figure illustrates the connection of a floating signal source to the
U2300A series DAQ in differential input mode. For floating signal sources,
additional resistor is needed at each channel to provide a bias return path. The
resistor value is equivalent to about 100 times the source impedance. If the source
impedance is less than 100
directly to AI_GND, as well as the negative input of the Instrumentation Amplifier.
The noise couples in differential input mode are less compared to the
single-ended mode.
Figure 2-4
– Keysight U2300A series DAQ is designed with high input impedance. Please
NOTE
– Unused pins at multiplexing DAQ inputs can be treated as floating source
Keysight U2300A Series User's Guide
Floating source and differential input
ensure that all the connection are connected properly before acquiring any
data. Failing to do so may cause data fluctuation or erroneous readings.
with infinite output impedance. Therefore, necessary grounding system is
required in user application system.
Connector Pins Configuration
, you can connect the negative polarity of the signal
Ω
2
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