Direct Connection - SPX RADIODETECTION RD7100 Guide D'utilisation

Locating with Active Frequencies
Active frequencies are applied to the target pipe or cable using the transmitter, and
provide the most effective way of tracing buried pipes or cables.
Generally speaking, it is better to use a low frequency on larger, low impedance utilities,
and move to a higher frequency on smaller, high impedance utilities.
The lowest power setting required to trace the target utility should always be used to
minimize the risk of false trails.
The transmitter can apply a signal using three different methods:

Direct connection

In direct connection, you connect the transmitter directly to the pipe or cable you wish to
survey using the red Direct Connect lead supplied. The black lead is generally connected
to earth using the supplied ground stake.
The transmitter will then apply a discrete signal to the line, which you can trace using the
locator. This method provides the best signal on an individual line and enables the use of
lower frequencies, which can be traced for longer distances.
WARNING! Direct connection to live conductors is POTENTIALLY LETHAL. Direct
connections to live conductors should be attempted by fully qualified personnel only
using the relevant products that allow connections to energized lines.
Induction
The transmitter is placed on the ground over or near the survey area. You select the
appropriate frequency. The transmitter will then induce the signal indiscriminately to
any nearby metallic conductor. In induction mode, using higher frequencies is generally
recommended as they are induced more easily onto nearby conductors.
Transmitter Clamp
An optional signal clamp can be placed around an insulated live wire or pipe up to
8.5" / 215mm in diameter to transfer the transmitter signal to the utility. This method of
applying the transmitter signal is particularly useful on insulated live wires and removes
the need to disconnect the supply to the cable.
WARNING! Do not clamp around uninsulated live conductors.
WARNING! Before applying or removing the clamp around a power cable ensure
that the clamp is connected to the transmitter at all times.
Locating with Passive Frequencies
Passive frequency detection takes advantage of signals that are already present on
buried metallic conductors. The RD7100 supports up to three types of passive
frequencies: Power, Radio and CPS* signals. You can detect these frequencies without
the aid of the transmitter.
*Model specific.
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