User manual

Calibration 2
U2300A Series DAQ Service Guide 19
• Non- Referenced Single- Ended (NRSE) Mode
In NRSE mode, the DAQ device does not provide the
grounding point. The ground reference point is provided
by the external analog input signal. You can connect the
signals in NRSE mode to measure ground- referenced
signal sources, which are connected to the same
grounding point. The following figure illustrates the
connection. The signal local ground reference is connected
to the negative input of the instrumentation Amplifier
(AI_SENSE pin on connector1). Hence, any potential
difference of the common mode ground between signal
ground and the signal ground on DAQ board will be
rejected by the instrumentation amplifier.
Figure 2-2 Ground-referenced sources and NRSE input connections