Connection Cable; Locating With The Rd2000 And T1 Transmitter - Radiodetection RD2000+ Guide De L'utilisateur

Connection Cable

Red cable connects the Transmitter
signal directly to target line. Black
cable provides the ground return via
Ground Stake. Connect cable plugs
lock in place in socket. To unlock
cable, grip the black sleeve on the
outside of the plug. Do not pull the
wire as this may damage the cable
and/or socket.
Ground Stake
This is for making a ground
connection to provide a return signal.
Regularly check your RD2000 and T1, in all modes over a cable which
gives a response you are familiar with.
Locating with the RD2000
and T1 Transmitter
Induction
The Transmitter has an internal aerial that will induce a signal onto a line
(or lines) directly below it, without the need for access to the line. Generally,
induction can only be used to depths of 2m (6ft).
Induction is only available with frequencies 8kHz and above.
Procedure
Set down the Transmitter over the
approximate position of the line
with arrows pointing parallel to
the line. Set Receiver sensitivity
to mid-way and start locating
line at least 10 paces away from
the Transmitter. Mark the ground
where each peak response is
detected by the Receiver.
Note: Induction cannot be used to apply a signal to a line below reinforced
concrete. the transmitter signal may be detected directly and not from
the target line, so do not attempt depth measurements when closer than
15 paces from the transmitter. to check, point the receiver directly at the
transmitter. if the receiver signal strength increases, either reduce the
transmitter power or increase the distance from the transmitter.
If the Receiver signal strength decreases, the received signal is from the
buried line.
Direct Connection
Suitable for use on continuous tracer wire, water and gas distribution
systems, a telecom cable, and pipeline at a CP test or other access point.
Procedure
Plug the Connection Cable into
the Transmitter and to the target
line. If necessary clean off paint,
rust or scale to ensure good
connection.
Clip the ground cable to an
independent grounding point a
few paces away and preferably at
right angles to the probable route
of the target line. Do not attach
ground to water pipe or buried
line which could carry the signal.
Start with the low power setting. A good connection is indicated by a change
in loudspeaker tone. If there is no tone change, check the electrical contact
and ground. If necessary change the position of the ground or tip water over
the ground contact if placed in dry soil or sand. If there is still no change in
tone increase the power setting to high.
Note: A receiver can detect a signal many times weaker than that necessary
for a transmitter tone change and short distances can be traced without a
tone change from the loudspeaker.
WARNING! should only be used on a power cable sheath by
qualifi ed personnel.
RD2000+, RD2000S, RD2000CPS and T1 User Guide
Signal Clamp
(optional extra)
The Signal Clamp applies a
signal to a pipe or a live cable
without interrupting the supply.
It applies a very discriminating
signal with reduced coupling to
other conductors.
WARNING! to avoid the risk of electric shock, the signal clamp must
be connected to the transmitter before being placed around the pipe
or cable.
Procedure
Connect the Signal Clamp to the Transmitter.
Place the Signal Clamp around the pipe or cable, ensuring the jaws are
closed. Switch on the Transmitter.
A disconnected pipe or cable cannot generally be located using a
Signal Clamp.
Locating a Sonde
A new battery of freshly recharged battery should be used at the beginning
of each day and preferably at the start of each job. Check that the Sonde
and Receiver are operating at the same frequency and working correctly.
As a quick test for both Sonde and Receiver - position the Sonde at a
distance equal to its rated Depth range from the receiver. Point the Receiver
at the Sonde with its blade in line. Check that the bar graph shows more than
50% at high sensitivity
Note: the blade of the new Receiver must be in line with the Sonde, the
opposite to Line locate.
Attach the Sonde to the rod and
insert it into the Drain or Duct
to be located. Keep the Sonde
just in view. Hold the Receiver
vertically directly over the Sonde
with the blade in line with the
Sonde.
Adjust the sensitivity of the
Receiver to give a bar graph
reading between 60-80%.
A Sonde radiates a peak fi eld
from the centre of its axis with
ghost signals at each side of the
peak. Move the Receiver a little
way to one side and then along
the axis of the Sonde forwards
and backwards to detect the
ghost signals.
It is a good idea to locate the
ghost signals as fi nding them
positively confi rms the position
of the main peak. To loose
the ghost signals reduce the
sensitivity of the Receiver a little,
leaving only the main peak signal
detectable.
With the Receiver sensitivity set
as desired, propel the Sonde
along three or four paces and
stop. Place the Receiver over the
supposed position of the Sonde
and...
A
Move the Receivers
backwards and forwards
with the blade in line with the
Sonde and stop when the bar
graph indicates a clear peak.
A
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