3M
™
Advanced Systems Tester 900AST Series
32
RFL
(Resistance Fault Locate)
Use this function to locate a Resistance Fault on a
pair of conductors or between a single conductor
and ground
First, use the Resistance function to determine the
faulted conductor and to find a separate good pair of
conductors (with no faults) in the same cable. If you
prefer, you can run a pair of wires to the end of the
faulted wire to serve as the ‘separate good pair’.
Once you identify the wires, short (‘Strap’) the far-
end of the faulted conductor to the two conductors
of the separate good pair. Press the
key.
The hookup screen will show the last selected wire
gauge and temperature. Use the
key to change
the gauge, temperature or enter a known distance to
the Strap.
