15
MAIN UNIT
3
CONNECTIONS
3.4.2
Connecting Voltage Signals
Voltage signals can be connected in two basic ways. Which one to use depends
on whether the signal is "floating" or not.
Combinations of the two methods are of course possible!
Differential or ratiometric transducers may also be directly connected.
1) Connecting signals with common grounding
Note that only one of the
Diff/Gnd switches is in
position "Gnd".
This will establish a
good reference potential
for both channels.
2) Connecting isolated or "floating" signals.
Each floating signal has
to be individually
grounded to logger
"Gnd".
3) Differential or Ratiometric transducers
This illustration shows
how a bridge type
transducer (load cells,
pressure sensors etc.)
should be connected.
The "V-out" is used as
excitation voltage.
