Radiodetection RD5100 H2O+ Guide D'utilisation page 7

Locating pipes and cables
For more detailed descriptions of using the
locator and transmitter, and for detailed
locate techniques, refer to the Operation
Manual.
The RD5100H O+ locator is designed to
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operate with the 'blade' of the locator
perpendicular to the path of the cable or
pipe being located.
Running a Self-Test
We recommend that a Self-Test is run at
least weekly, or before each use. As the
Self-Test tests the integrity of the locate circuity, it is important that it is carried out
away from larger metallic object such as vehicles, or strong electrical signals. To run a
Self-Test:
1. Press the key to enter the menu.
2. Scroll to the INFO menu using the
3. Press the key to enter the INFO menu.
4. Select TEST using the or arrows.
5. Press the key to select YES.
6. Press the key to begin the Self-Test.
7. Once the Self-Test is completed, the result (PASS or FAIL) will be displayed.
8. Restart the locator using the key.
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
or arrows.
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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
215mm (8.5") 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 RD5100H
frequencies: Power and Radio signals. You can detect these frequencies without the aid
of the transmitter.
Locate Modes
The RD5100H O+ simplifies the locate mode choice by automatic selection. The
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required locate mode has been designed and optimized to meet the specific use
balanced against the required task. Locate modes are selected by the system
dependent on the frequency in use.
The locate mode is shown by symbols as follows:
PEAK: For accurate locating, the peak bargraph provides a visual readout of
the signal strength. The peak signal is found directly over the buried utility.
Peak mode is automatically selected in power or radio modes.
GUIDANCE: Proportional arrows and a ballistic 'needle' combine with audio
left/right indication for rapidly tracing the general path of a buried utility.
Switch the Target Position Indicator ON/OFF by holding the
automatically selected with active frequencies (512Hz/640Hz, 4096Hz, 8kHz, 9.8kHz,
33kHz, 65kHz, 83kHz and 131kHz).
O+ supports two types of passive
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key. Guidance mode is
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