Radiodetection RD4000T10, Руководство пользователя

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RD4000 Locating System User Manual
Page 48
Connecting a transmitter clamp
•
Plug the clamp connector into the transmitter accessory socket
•
Close the clamp around the pipe or cable, making sure the jaws are closed
•
Switch the transmitter on
•
Select required frequency and output power level.
Plug connector
The plug connector applies the transmitter signal to a live domestic power socket, and via the domestic wiring
system, onto the service cable and the supply cable in the street. The signal should be detectable on the supply
system a few hundred paces each side of the point of application. If access can be gained to the premises to
apply the plug connector this is the most certain system to locate a power distribution system in the street.
Live cable connector
WARNING. THE LIVE CABLE CONNECTOR IS FOR USE ONLY BY OPERATORS LICENSED OR
PERMITTED TO WORK ON LIVE CABLES.
The live cable connector is used to apply the transmitter signal to a live cable.
Induction
The RD4000T3, T3F, and RD4000T10 transmitters contain an antenna that will induce a signal onto a line directly
below the transmitter. Induction efficiency is poor on deep targets and is useful at depths down to two metres/6
feet. The induction signal can be applied without access to the line and is very simple and quick to apply.
The signal can induce onto nearby lines as well as the target. A substantial part of the signal strength is lost in
the surrounding soil. The receiver should not be used within a minimum of 30 paces from the transmitter, and
often much further if high power is being used from the transmitter. Induction should not be used to apply a
signal to a line that is below a metal cover or reinforced concrete (rebar), as the signal will be shielded by the
metal cover and the reinforcing mesh. Induction will not apply a signal to a well-insulated line unless the line is
effectively grounded at each end.
Positioning the transmitter
Position the transmitter over the target pipe or cable with the carrying handle in line with the pipe or cable.
Induction tips
Keeping distance from transmitter
In induction mode the transmitter radiates a signal into the
atmosphere as well as onto the line and this may cause
problems when trying to work close to the transmitter. To
check that the receiver is locating the line rather than picking
up the transmitter signal directly, move the transmitter a pace
or two to one side. If the line appears to move too it indicates
that the receiver is too close to the transmitter. Another method
of determining if the receiver is picking up the transmitter signal
is to point the receiver directly at the transmitter.
d
d
min 30 pa
ces recom
mended