Datcon DT9502 Operating Instructions Manual page 15

DT9502
Connection
3-wire mode
(see also "Application
example")
20171205-V3
•
The shieldings of the cables connected to Pt100 and to
the current loop must be connected with each other.
Be careful the polarity of the cables.
The 3-wire operating mode results in less accurate
measurement than the 4-wire operating mode, as the
different resistances of the cable wires, their asymmetry,
and the various temporary resistance values of contacts
cause additional measurement errors. The use of this mode
is recommended only for those cases that are satisfied by
less accuracy.
In all other cases it is practicable to use the 4-wire operating
mode (according to the connection depicted in the previous
page).
15