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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).
If the test reports that it cannot detect the strap
when the measured loop resistance is >10 k
ohms, this may mean:
o
There is no strap connected.
o
There is a strap, but the cable is too long
and has a loop resistance >10 k Ohms.
o
There is a strap, but there is a high
resistance fault or open in the cable.
o
The connection (leads or strap) may be
faulty.
The resistance test may be used to
troubleshoot this problem.
Fault Status displays the status of the RFL
test.
Test Status displays the current state of
measurement or an error message.
14.3 K-Test
The RFL K-Test (Küpfmüller test) method allows you to
locate faults on both conductors of one pair. In other
words, the K-Test is specialized for detecting double
faults.
Due to the precision and sensitive nature of RFL tests,
the cable pair under test should be open
(disconnected) and battery removed. One of the faults
must be greater in resistance than the fault on the other
pair.
Note: K-Test is implemented to locate double sided
faults when a good wire/pair isn't available. Both
resistance faults must occur at the same place in
the cable (either both to ground, or both to the
same negative or positive battery voltage).
© 2020 Radiodetection Ltd
6100-Cu Multifunction Copper Tester Operation Manual
The K-Test is performed in 2 steps:
1. Measurements are made with the far end open.
2. Measurements are made with the far end
closed/shorted (strap).
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 K-Test RFL.
131
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