Intab PC-Logger 3100i, How To Use Manual

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INTAB Interface-Teknik AB
6.3.3 Voltages
Voltages are measured by connecting in one of the two indicated ways (see
figure below). The two methods can be combined if care is taken to avoid
ground loops.
1) Signals with Common ground reference.
+
-
+
-
1
2
GND DIFF
Connect ”3100i” signal
GND to system ground.
Connect sensors
Place switch in position
”DIFF”
2) ”Floating” signals.
+
-
+
-
1
2
DIFF GND
Leave signal GND
unconnected.
Connect your sensors
Refer signals to GND by
placing switch in position
”GND”