© 2014 Radiodetection Ltd
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9.2.1 Connecting the transmitter
1 With the transmitter switched off connect the direct
connection lead into the transmitter accessory
socket
2 Clip the red connection lead to the cable, cable
sheath or pipe ensuring that the area around the
connection is clean and that a positive connection is
achieved
3 Extend the black connection lead as far away as
possible and at 90° to the probable route of the
target cable and clip the connector to the ground
stake ensuring that a positive connection is
achieved
NOTE: Always connect the black connection lead to a
ground stake and not a water pipe or buried cable, as
these may carry the signal.
9.2.2 Reference readings
It is good practice to obtain a reference reading from the
ground stake before you attempt to locate a fault on a
target line. Reference readings help to provide the
following information:
Severity of fault
Survey interval
Before taking the reference reading set up the
transmitter and locator as follow:
On the transmitter
:
1 Select a fault-finding frequency using the
key
2 Use the
or
keys to increase or decrease the
output signal level
3 If required you can use the BOOST setting if the
fault is located on a high resistance cable or if the
cable is long
WARNING! By selecting 8KFF the transmitter will have
the ability to output high voltages and a high voltage
warning icon will appear on the transmitter’s LCD.
On the locator:
4 Connect one end of the connection lead to the A-
frame socket
5 Connect the other end to the locator accessory
socket
6 The locator will automatically recognize the A-frame
and display the A-frame icon on the LCD
7 Select a fault-finding frequency using the
key
NOTE: If the locator and transmitter are iLOC enabled
then you can remotely control the transmitter using the
locator. See Section 11 for more information.
Obtaining a reference reading:
Position the locator approximately 2m (6 feet) from the
ground stake and push the A-frame spikes into the
ground with the green spike towards the ground stake
Attach the locator to the A-frame by the retention hook.
(If you are holding the locator separately, make sure
that the locator is in line with the A-frame and is pointing
towards the green spike.) The fault direction arrow
should be pointing away from the ground stake. If it is
not, make sure that the transmitter is connected
correctly (red connector to the cable and black to the
ground stake).
Take the dB reading and keep it for reference. If there is
a single fault on the cable, it will be approximately the
same dB value as the reference reading.
NOTE. To establish how often to take readings on the
cable or pipe, move away from the ground stake and
take further readings until the arrow has difficulty in
locking and the dB reading is low. Measure the distance
that the locator is now away from the ground stake. This
is the distance that you can safely use between taking
readings on the cable or pipe to ensure that you do not
miss the fault.
9.3 How to find a fault
Starting from the transmitter, walk along the cable or
pipe route pushing the A-Frame spikes into the ground
with the green spike pointing away from the transmitter.
Where there are no faults the dB reading will be low and
the direction arrow may flicker forward and back.
NOTE: Flickering arrows may also indicate that you may
be too far away from the fault or ground stake (or both)
for the locator to lock on.
Figure 9.1: Cable sheath fault-finding
If you are trying to locate high resistance faults or there
is a long distance between faults, carry on with the
survey and the locator will lock on when you get closer
to the fault.
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