6100-Gfast Multifunction Copper Tester Operation Manual
© 2020 Radiodetection Ltd
135
RFL
Resistance fault locator (RFL) testing is a powerful
means to locate resistive faults such as shorts,
grounds, and battery crosses.
Before performing RFL tests, install the strap(s) at the
other end of the cable. Use of an oscillator or toner as a
far end strap is not recommended, as it will induce
errors. RFL consists of 3 tests: Single Pair, Separate
Good Pair, and Küpfmüller Test (K-Test).
14.1 Single Pair
The RFL
Single Pair
or 2-wire test allows you to locate
resistive faults between tip and ground, or ring and
ground. By default, the unit assumes that the fault
cable is connected to ring.
Connect the strap to the far end of the wires connected
to T/A and R/B.
The
connection diagram
shows you how to
connect the cables to the unit. The green lead
is used as reference.
When FED is
Enabled
on the
FED Setup
page, the
Confirmation
window pops up
displaying how to connect your cables at the
beginning of the test. The FED allows you to
remotely place a
strap
(to short together) the T-
R/A-B pair at the far end for 2-wire RFL.
The
Confirmation
diagram uses graphic and
textual components.
o
Proceed
button closes the hookup
diagram prompt and starts the test.
o
Cancel
button closes the hookup
diagram prompt only.
Note: Results are less accurate than a separate good
pair setup.
Current Test
displays the test being
measured. When FED is
Enabled
, the FED
icon and numeric state are displayed beside
the
Current Test
.
Cable Setup
button opens a new page that
allows you to set the cable parameters for the
Current Test
. Press
to open the page.
Result
displays single pair RFL test results.
Based on the cable condition, corresponding
values are added into the diagram at their
specific positions. Test result units are
dependent on
Standard
in
Setup/Application
Settings
.
o
Distance to strap (DTS).
o
Resistance to strap (RTS).
o
Distance from fault to strap (DFTS).
o
Resistance from fault to strap (RFTS).
o
Resistance to fault (RTF).
o
Distance to fault (DTF).
o
Faulted cable (FC).
o
Resistance at fault (Rf) is resistance
from the fault to the resistance wire.
o
Voltage at fault (Vf).
6100
