Measurement Computing Data Translation DT3034 User Manual page 48

A)
+
Floating
R
Signal s
Source

B)
Bridge
R
v
R
s

+
DC Supply
Figure 7: Connecting Differential Voltage Inputs to the DT740
Note that since they measure the difference between the signals at the high (+) and low ()
inputs, differential connections usually cancel any common-mode voltages, leaving only the
signal. However, if you are using a grounded signal source and ground loop problems arise,
connect the differential signals to the DT740 screw terminal panel as shown in
Make sure that the low side of the signal () is connected to ground at the signal source, not at
the screw terminal panel, and do not tie the two grounds together.
Analog In 0
Analog In 0
Return
R1
Analog Ground
Analog In 0
Analog In 0
Return
Analog Ground
(Shown for Channel 0)
TB1
TB34
TB2
You can use resistor R1 to
connect the low side of
channel 0 to analog
ground.
TB1
TB34
TB2
Wiring Signals
DT740
Panel
DT740
Panel
Figure 8.
47