LKZ-1500-
LITE ● LKZ-1500 – USER MANUAL
39
5.2.2
The search of the insulation failure by the signal rise
The technique of search is the same for A-frame and DKI-E.
A-frame
: drive one of the sensors into the ground, and drive the other one next to the first
one.
DKI-E probe
: one of the two operators should walk along the track at a steady pace. The oth-
er operator must follow the track at a distance from the trace centreline.
The insulation fault is located where the signal strength peaks (
Fig. 35 Connection diagram and the signal strength when locating an insulation fault by detec-
tion of the signal rise
Using the “A-frame” provides more accurate readings from measurement to measurement, since
the fixed distance between the pins eliminates signal fluctuation error caused by different distances.
Measurements with this sensor, however, require the pins to be embedded into the soil, that may be
inconvenient in some cases.
Keep the insulator surface of the
A-frame
clean. Soiling may cause signal drop or loss of sensitiv-
ity. When operation keep the insulator surface of the A-frame clean. Soiling may cause signal drop or
loss of sensitivity.
DKI-E
sensor accelerates tracing of single expanded utilities. The sensor operability does not de-
pend on the type of soil or paving. The sensor, however, has lower sensitivity, particularly at low fre-
quencies. Each operator holds a contact electrode of the sensor during operation. If tracing is per-
formed close to the fault, the distance between the operators shall be reduced to clarify the position of
cable failure.
Signal strength
DKI-E
2nd operator
1st operator
with the Receiver
Insulation fault location
A-frame
(plan view)
4
m
m
a
x
Summary of Contents for LKZ-1500
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